UX: Fix chat separator alignment (#20669)

Also: work around 1px svg shift in scroll-to-bottom button

app/assets/javascripts/discourse-common/addon/helpers/popular-themes.js

@@ -2,7 +2,7 @@ export const POPULAR_THEMES = [
   {
     name: "Graceful",
     value: "https://github.com/discourse/graceful",
-    preview: "https://theme-creator.discourse.org/theme/awesomerobot/graceful",
+    preview: "https://discourse.theme-creator.io/theme/awesomerobot/graceful",
     description: "A light and graceful theme for Discourse.",
     meta_url:
       "https://meta.discourse.org/t/a-graceful-theme-for-discourse/93040",
@@ -10,8 +10,7 @@ export const POPULAR_THEMES = [
   {
     name: "Material Design Theme",
     value: "https://github.com/discourse/material-design-stock-theme",
-    preview:
-      "https://theme-creator.discourse.org/theme/tshenry/material-design",
+    preview: "https://discourse.theme-creator.io/theme/tshenry/material-design",
     description:
       "Inspired by Material Design, this theme comes with several color palettes (incl. a dark one).",
     meta_url: "https://meta.discourse.org/t/material-design-stock-theme/47142",
@@ -19,7 +18,7 @@ export const POPULAR_THEMES = [
   {
     name: "Minima",
     value: "https://github.com/discourse/minima",
-    preview: "https://theme-creator.discourse.org/theme/awesomerobot/minima",
+    preview: "https://discourse.theme-creator.io/theme/awesomerobot/minima",
     description: "A minimal theme with reduced UI elements and focus on text.",
     meta_url:
       "https://meta.discourse.org/t/minima-a-minimal-theme-for-discourse/108178",
@@ -27,7 +26,7 @@ export const POPULAR_THEMES = [
   {
     name: "Sam's Simple Theme",
     value: "https://github.com/discourse/discourse-simple-theme",
-    preview: "https://theme-creator.discourse.org/theme/sam/simple",
+    preview: "https://discourse.theme-creator.io/theme/sam/simple",
     description:
       "Simplified front page design with classic colors and typography.",
     meta_url:
@@ -36,6 +35,8 @@ export const POPULAR_THEMES = [
   {
     name: "Brand Header",
     value: "https://github.com/discourse/discourse-brand-header",
+    preview:
+      "https://discourse.theme-creator.io/theme/vinothkannans/brand-header",
     description:
       "Add an extra top header with your logo, navigation links and social icons.",
     meta_url: "https://meta.discourse.org/t/brand-header-theme-component/77977",
@@ -45,7 +46,7 @@ export const POPULAR_THEMES = [
     name: "Custom Header Links",
     value: "https://github.com/discourse/discourse-custom-header-links",
     preview:
-      "https://theme-creator.discourse.org/theme/Johani/custom-header-links",
+      "https://discourse.theme-creator.io/theme/awesomerobot/custom-header-links",
     description: "Easily add custom text-based links to the header.",
     meta_url: "https://meta.discourse.org/t/custom-header-links/90588",
     component: true,
@@ -61,7 +62,7 @@ export const POPULAR_THEMES = [
     name: "Category Banners",
     value: "https://github.com/discourse/discourse-category-banners",
     preview:
-      "https://theme-creator.discourse.org/theme/awesomerobot/discourse-category-banners",
+      "https://discourse.theme-creator.io/theme/awesomerobot/discourse-category-banners",
     description:
       "Show banners on category pages using your existing category details.",
     meta_url: "https://meta.discourse.org/t/discourse-category-banners/86241",
@@ -70,7 +71,7 @@ export const POPULAR_THEMES = [
   {
     name: "Kanban Board",
     value: "https://github.com/discourse/discourse-kanban-theme",
-    preview: "https://theme-creator.discourse.org/theme/david/kanban",
+    preview: "https://discourse.theme-creator.io/theme/david/kanban",
     description: "Display and organize topics using a Kanban board interface.",
     meta_url:
       "https://meta.discourse.org/t/kanban-board-theme-component/118164",
@@ -84,10 +85,19 @@ export const POPULAR_THEMES = [
     meta_url: "https://meta.discourse.org/t/hamburger-theme-selector/61210",
     component: true,
   },
+  {
+    name: "Sidebar Theme Toggle",
+    value: "https://github.com/discourse/discourse-sidebar-theme-toggle",
+    description:
+      "Displays a theme selector in the sidebar menu’s footer provided there is more than one user-selectable theme.",
+    meta_url: "https://meta.discourse.org/t/sidebar-theme-toggle/242802",
+    component: true,
+  },
   {
     name: "Header Submenus",
     value: "https://github.com/discourse/discourse-header-submenus",
-    preview: "https://theme-creator.discourse.org/theme/Johani/header-submenus",
+    preview:
+      "https://discourse.theme-creator.io/theme/awesomerobot/header-submenus",
     description: "Lets you build a header menu with submenus (dropdowns).",
     meta_url: "https://meta.discourse.org/t/header-submenus/94584",
     component: true,
@@ -104,7 +114,7 @@ export const POPULAR_THEMES = [
   {
     name: "Easy Responsive Footer",
     value: "https://github.com/discourse/Discourse-easy-footer",
-    preview: "https://theme-creator.discourse.org/theme/Johani/easy-footer",
+    preview: "https://discourse.theme-creator.io/theme/Johani/easy-footer",
     description: "Add a fully responsive footer without writing any HTML.",
     meta_url: "https://meta.discourse.org/t/easy-responsive-footer/95818",
     component: true,

app/models/bookmark.rb

@@ -46,7 +46,8 @@ class Bookmark < ActiveRecord::Base
   validates :name, length: { maximum: 100 }
 
   def registered_bookmarkable
-    Bookmark.registered_bookmarkable_from_type(self.bookmarkable_type)
+    type = Bookmark.polymorphic_class_for(self.bookmarkable_type).name
+    Bookmark.registered_bookmarkable_from_type(type)
   end
 
   def polymorphic_columns_present

app/models/reviewable.rb

@@ -129,7 +129,7 @@ class Reviewable < ActiveRecord::Base
       update_args = {
         status: statuses[:pending],
         id: target.id,
-        type: target.class.name,
+        type: target.class.sti_name,
         potential_spam: potential_spam == true ? true : nil,
       }
 

lib/tasks/docker.rake

@@ -213,7 +213,10 @@ task "docker:test" do
             @good &&= run_or_fail("bundle exec rspec #{params.join(" ")}".strip)
           end
 
-          @good &&= run_or_fail("bundle exec rspec spec/system".strip) if ENV["RUN_SYSTEM_TESTS"]
+          if ENV["RUN_SYSTEM_TESTS"]
+            @good &&= run_or_fail("bin/ember-cli --build")
+            @good &&= run_or_fail("bundle exec rspec spec/system")
+          end
         end
 
         unless ENV["SKIP_PLUGINS"]

plugins/chat/app/controllers/admin/admin_incoming_chat_webhooks_controller.rb

@@ -1,60 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::AdminIncomingChatWebhooksController < Admin::AdminController
-  requires_plugin Chat::PLUGIN_NAME
-
-  def index
-    render_serialized(
-      {
-        chat_channels: ChatChannel.public_channels,
-        incoming_chat_webhooks: IncomingChatWebhook.includes(:chat_channel).all,
-      },
-      AdminChatIndexSerializer,
-      root: false,
-    )
-  end
-
-  def create
-    params.require(%i[name chat_channel_id])
-
-    chat_channel = ChatChannel.find_by(id: params[:chat_channel_id])
-    raise Discourse::NotFound if chat_channel.nil? || chat_channel.direct_message_channel?
-
-    webhook = IncomingChatWebhook.new(name: params[:name], chat_channel: chat_channel)
-    if webhook.save
-      render_serialized(webhook, IncomingChatWebhookSerializer, root: false)
-    else
-      render_json_error(webhook)
-    end
-  end
-
-  def update
-    params.require(%i[incoming_chat_webhook_id name chat_channel_id])
-
-    webhook = IncomingChatWebhook.find_by(id: params[:incoming_chat_webhook_id])
-    raise Discourse::NotFound unless webhook
-
-    chat_channel = ChatChannel.find_by(id: params[:chat_channel_id])
-    raise Discourse::NotFound if chat_channel.nil? || chat_channel.direct_message_channel?
-
-    if webhook.update(
-         name: params[:name],
-         description: params[:description],
-         emoji: params[:emoji],
-         username: params[:username],
-         chat_channel: chat_channel,
-       )
-      render json: success_json
-    else
-      render_json_error(webhook)
-    end
-  end
-
-  def destroy
-    params.require(:incoming_chat_webhook_id)
-
-    webhook = IncomingChatWebhook.find_by(id: params[:incoming_chat_webhook_id])
-    webhook.destroy if webhook
-    render json: success_json
-  end
-end

plugins/chat/app/controllers/api/chat_channels_status_controller.rb

@@ -1,11 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::Api::ChatChannelsStatusController < Chat::Api::ChatChannelsController
-  def update
-    with_service(Chat::Service::UpdateChannelStatus) do
-      on_success { render_serialized(result.channel, ChatChannelSerializer, root: "channel") }
-      on_model_not_found(:channel) { raise ActiveRecord::RecordNotFound }
-      on_failed_policy(:check_channel_permission) { raise Discourse::InvalidAccess }
-    end
-  end
-end

plugins/chat/app/controllers/api/chat_current_user_channels_controller.rb

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::Api::ChatCurrentUserChannelsController < Chat::Api
-  def index
-    structured = Chat::ChatChannelFetcher.structured(guardian)
-    render_serialized(structured, ChatChannelIndexSerializer, root: false)
-  end
-end

plugins/chat/app/controllers/api_controller.rb

@@ -1,29 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::Api < Chat::ChatBaseController
-  before_action :ensure_logged_in
-  before_action :ensure_can_chat
-
-  include Chat::WithServiceHelper
-
-  private
-
-  def ensure_can_chat
-    raise Discourse::NotFound unless SiteSetting.chat_enabled
-    guardian.ensure_can_chat!
-  end
-
-  def default_actions_for_service
-    proc do
-      on_success { render(json: success_json) }
-      on_failure { render(json: failed_json, status: 422) }
-      on_failed_policy(:invalid_access) { raise Discourse::InvalidAccess }
-      on_failed_contract do
-        render(
-          json: failed_json.merge(errors: result[:"result.contract.default"].errors.full_messages),
-          status: 400,
-        )
-      end
-    end
-  end
-end

plugins/chat/app/controllers/chat/admin/incoming_webhooks_controller.rb

@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+module Chat
+  module Admin
+    class IncomingWebhooksController < ::Admin::AdminController
+      requires_plugin Chat::PLUGIN_NAME
+
+      def index
+        render_serialized(
+          {
+            chat_channels: Chat::Channel.public_channels,
+            incoming_chat_webhooks: Chat::IncomingWebhook.includes(:chat_channel).all,
+          },
+          Chat::AdminChatIndexSerializer,
+          root: false,
+        )
+      end
+
+      def create
+        params.require(%i[name chat_channel_id])
+
+        chat_channel = Chat::Channel.find_by(id: params[:chat_channel_id])
+        raise Discourse::NotFound if chat_channel.nil? || chat_channel.direct_message_channel?
+
+        webhook = Chat::IncomingWebhook.new(name: params[:name], chat_channel: chat_channel)
+        if webhook.save
+          render_serialized(webhook, Chat::IncomingWebhookSerializer, root: false)
+        else
+          render_json_error(webhook)
+        end
+      end
+
+      def update
+        params.require(%i[incoming_chat_webhook_id name chat_channel_id])
+
+        webhook = Chat::IncomingWebhook.find_by(id: params[:incoming_chat_webhook_id])
+        raise Discourse::NotFound unless webhook
+
+        chat_channel = Chat::Channel.find_by(id: params[:chat_channel_id])
+        raise Discourse::NotFound if chat_channel.nil? || chat_channel.direct_message_channel?
+
+        if webhook.update(
+             name: params[:name],
+             description: params[:description],
+             emoji: params[:emoji],
+             username: params[:username],
+             chat_channel: chat_channel,
+           )
+          render json: success_json
+        else
+          render_json_error(webhook)
+        end
+      end
+
+      def destroy
+        params.require(:incoming_chat_webhook_id)
+
+        webhook = Chat::IncomingWebhook.find_by(id: params[:incoming_chat_webhook_id])
+        webhook.destroy if webhook
+        render json: success_json
+      end
+    end
+  end
+end

plugins/chat/app/controllers/chat/api/channel_threads_controller.rb

@@ -1,9 +1,9 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChannelThreadsController < Chat::Api
+class Chat::Api::ChannelThreadsController < Chat::ApiController
   def show
-    with_service(Chat::Service::LookupThread) do
-      on_success { render_serialized(result.thread, ChatThreadSerializer, root: "thread") }
+    with_service(::Chat::LookupThread) do
+      on_success { render_serialized(result.thread, ::Chat::ThreadSerializer, root: "thread") }
       on_failed_policy(:threaded_discussions_enabled) { raise Discourse::NotFound }
       on_failed_policy(:threading_enabled_for_channel) { raise Discourse::NotFound }
       on_model_not_found(:thread) { raise Discourse::NotFound }

plugins/chat/app/controllers/chat/api/channels_archives_controller.rb

@@ -1,13 +1,13 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChannelsArchivesController < Chat::Api::ChatChannelsController
+class Chat::Api::ChannelsArchivesController < Chat::Api::ChannelsController
   def create
     existing_archive = channel_from_params.chat_channel_archive
 
     if existing_archive.present?
       guardian.ensure_can_change_channel_status!(channel_from_params, :archived)
       raise Discourse::InvalidAccess if !existing_archive.failed?
-      Chat::ChatChannelArchiveService.retry_archive_process(chat_channel: channel_from_params)
+      Chat::ChannelArchiveService.retry_archive_process(chat_channel: channel_from_params)
       return render json: success_json
     end
 
@@ -20,12 +20,12 @@ class Chat::Api::ChatChannelsArchivesController < Chat::Api::ChatChannelsControl
     end
 
     begin
-      Chat::ChatChannelArchiveService.create_archive_process(
+      Chat::ChannelArchiveService.create_archive_process(
         chat_channel: channel_from_params,
         acting_user: current_user,
         topic_params: topic_params,
       )
-    rescue Chat::ChatChannelArchiveService::ArchiveValidationError => err
+    rescue Chat::ChannelArchiveService::ArchiveValidationError => err
       return render json: failed_json.merge(errors: err.errors), status: 400
     end
 

plugins/chat/app/controllers/chat/api/channels_controller.rb

@@ -3,19 +3,19 @@
 CHANNEL_EDITABLE_PARAMS = %i[name description slug]
 CATEGORY_CHANNEL_EDITABLE_PARAMS = %i[auto_join_users allow_channel_wide_mentions]
 
-class Chat::Api::ChatChannelsController < Chat::Api
+class Chat::Api::ChannelsController < Chat::ApiController
   def index
     permitted = params.permit(:filter, :limit, :offset, :status)
 
     options = { filter: permitted[:filter], limit: (permitted[:limit] || 25).to_i }
     options[:offset] = permitted[:offset].to_i
-    options[:status] = ChatChannel.statuses[permitted[:status]] ? permitted[:status] : nil
+    options[:status] = Chat::Channel.statuses[permitted[:status]] ? permitted[:status] : nil
 
-    memberships = Chat::ChatChannelMembershipManager.all_for_user(current_user)
-    channels = Chat::ChatChannelFetcher.secured_public_channels(guardian, memberships, options)
+    memberships = Chat::ChannelMembershipManager.all_for_user(current_user)
+    channels = Chat::ChannelFetcher.secured_public_channels(guardian, memberships, options)
     serialized_channels =
       channels.map do |channel|
-        ChatChannelSerializer.new(
+        Chat::ChannelSerializer.new(
           channel,
           scope: Guardian.new(current_user),
           membership: memberships.find { |membership| membership.chat_channel_id == channel.id },
@@ -29,7 +29,7 @@ class Chat::Api::ChatChannelsController < Chat::Api
   end
 
   def destroy
-    with_service Chat::Service::TrashChannel do
+    with_service Chat::TrashChannel do
       on_model_not_found(:channel) { raise ActiveRecord::RecordNotFound }
     end
   end
@@ -43,7 +43,7 @@ class Chat::Api::ChatChannelsController < Chat::Api
       raise Discourse::InvalidParameters.new(:name)
     end
 
-    if ChatChannel.exists?(
+    if Chat::Channel.exists?(
          chatable_type: "Category",
          chatable_id: channel_params[:chatable_id],
          name: channel_params[:name],
@@ -69,12 +69,12 @@ class Chat::Api::ChatChannelsController < Chat::Api
     channel.user_chat_channel_memberships.create!(user: current_user, following: true)
 
     if channel.auto_join_users
-      Chat::ChatChannelMembershipManager.new(channel).enforce_automatic_channel_memberships
+      Chat::ChannelMembershipManager.new(channel).enforce_automatic_channel_memberships
     end
 
     render_serialized(
       channel,
-      ChatChannelSerializer,
+      Chat::ChannelSerializer,
       membership: channel.membership_for(current_user),
       root: "channel",
     )
@@ -83,7 +83,7 @@ class Chat::Api::ChatChannelsController < Chat::Api
   def show
     render_serialized(
       channel_from_params,
-      ChatChannelSerializer,
+      Chat::ChannelSerializer,
       membership: channel_from_params.membership_for(current_user),
       root: "channel",
     )
@@ -96,11 +96,11 @@ class Chat::Api::ChatChannelsController < Chat::Api
       auto_join_limiter(channel_from_params).performed!
     end
 
-    with_service(Chat::Service::UpdateChannel, **params_to_edit) do
+    with_service(Chat::UpdateChannel, **params_to_edit) do
       on_success do
         render_serialized(
           result.channel,
-          ChatChannelSerializer,
+          Chat::ChannelSerializer,
           root: "channel",
           membership: result.channel.membership_for(current_user),
         )
@@ -116,7 +116,7 @@ class Chat::Api::ChatChannelsController < Chat::Api
   def channel_from_params
     @channel ||=
       begin
-        channel = ChatChannel.find(params.require(:channel_id))
+        channel = Chat::Channel.find(params.require(:channel_id))
         guardian.ensure_can_preview_chat_channel!(channel)
         channel
       end
@@ -126,7 +126,7 @@ class Chat::Api::ChatChannelsController < Chat::Api
     @membership ||=
       begin
         membership =
-          Chat::ChatChannelMembershipManager.new(channel_from_params).find_for_user(current_user)
+          Chat::ChannelMembershipManager.new(channel_from_params).find_for_user(current_user)
         raise Discourse::NotFound if membership.blank?
         membership
       end

plugins/chat/app/controllers/chat/api/channels_current_user_membership_controller.rb

@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChannelsCurrentUserMembershipController < Chat::Api::ChatChannelsController
+class Chat::Api::ChannelsCurrentUserMembershipController < Chat::Api::ChannelsController
   def create
     guardian.ensure_can_join_chat_channel!(channel_from_params)
 
     render_serialized(
       channel_from_params.add(current_user),
-      UserChatChannelMembershipSerializer,
+      Chat::UserChannelMembershipSerializer,
       root: "membership",
     )
   end
@@ -14,7 +14,7 @@ class Chat::Api::ChatChannelsCurrentUserMembershipController < Chat::Api::ChatCh
   def destroy
     render_serialized(
       channel_from_params.remove(current_user),
-      UserChatChannelMembershipSerializer,
+      Chat::UserChannelMembershipSerializer,
       root: "membership",
     )
   end

plugins/chat/app/controllers/chat/api/channels_current_user_notifications_settings_controller.rb

@@ -2,13 +2,13 @@
 
 MEMBERSHIP_EDITABLE_PARAMS = %i[muted desktop_notification_level mobile_notification_level]
 
-class Chat::Api::ChatChannelsCurrentUserNotificationsSettingsController < Chat::Api::ChatChannelsController
+class Chat::Api::ChannelsCurrentUserNotificationsSettingsController < Chat::Api::ChannelsController
   def update
     settings_params = params.require(:notifications_settings).permit(MEMBERSHIP_EDITABLE_PARAMS)
     membership_from_params.update!(settings_params.to_h)
     render_serialized(
       membership_from_params,
-      UserChatChannelMembershipSerializer,
+      Chat::UserChannelMembershipSerializer,
       root: "membership",
     )
   end

plugins/chat/app/controllers/chat/api/channels_memberships_controller.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChannelsMembershipsController < Chat::Api::ChatChannelsController
+class Chat::Api::ChannelsMembershipsController < Chat::Api::ChannelsController
   def index
     params.permit(:username, :offset, :limit)
 
@@ -8,7 +8,7 @@ class Chat::Api::ChatChannelsMembershipsController < Chat::Api::ChatChannelsCont
     limit = (params[:limit] || 50).to_i.clamp(1, 50)
 
     memberships =
-      ChatChannelMembershipsQuery.call(
+      Chat::ChannelMembershipsQuery.call(
         channel: channel_from_params,
         offset: offset,
         limit: limit,
@@ -17,7 +17,7 @@ class Chat::Api::ChatChannelsMembershipsController < Chat::Api::ChatChannelsCont
 
     render_serialized(
       memberships,
-      UserChatChannelMembershipSerializer,
+      Chat::UserChannelMembershipSerializer,
       root: "memberships",
       meta: {
         total_rows: channel_from_params.user_count,

plugins/chat/app/controllers/chat/api/channels_messages_moves_controller.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChannelsMessagesMovesController < Chat::Api::ChatChannelsController
+class Chat::Api::ChannelsMessagesMovesController < Chat::Api::ChannelsController
   def create
     move_params = params.require(:move)
     move_params.require(:message_ids)
@@ -8,10 +8,7 @@ class Chat::Api::ChatChannelsMessagesMovesController < Chat::Api::ChatChannelsCo
 
     raise Discourse::InvalidAccess if !guardian.can_move_chat_messages?(channel_from_params)
     destination_channel =
-      Chat::ChatChannelFetcher.find_with_access_check(
-        move_params[:destination_channel_id],
-        guardian,
-      )
+      Chat::ChannelFetcher.find_with_access_check(move_params[:destination_channel_id], guardian)
 
     begin
       message_ids = move_params[:message_ids].map(&:to_i)

plugins/chat/app/controllers/chat/api/channels_status_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class Chat::Api::ChannelsStatusController < Chat::Api::ChannelsController
+  def update
+    with_service(Chat::UpdateChannelStatus) do
+      on_success { render_serialized(result.channel, Chat::ChannelSerializer, root: "channel") }
+      on_model_not_found(:channel) { raise ActiveRecord::RecordNotFound }
+      on_failed_policy(:check_channel_permission) { raise Discourse::InvalidAccess }
+    end
+  end
+end

plugins/chat/app/controllers/chat/api/chatables_controller.rb

@@ -1,13 +1,14 @@
 # frozen_string_literal: true
 
-class Chat::Api::ChatChatablesController < Chat::Api
+class Chat::Api::ChatablesController < Chat::ApiController
   def index
     params.require(:filter)
     filter = params[:filter].downcase
 
-    memberships = Chat::ChatChannelMembershipManager.all_for_user(current_user)
+    memberships = Chat::ChannelMembershipManager.all_for_user(current_user)
+
     public_channels =
-      Chat::ChatChannelFetcher.secured_public_channels(
+      Chat::ChannelFetcher.secured_public_channels(
         guardian,
         memberships,
         filter: filter,
@@ -41,7 +42,7 @@ class Chat::Api::ChatChatablesController < Chat::Api
     direct_message_channels =
       if users.count > 0
         # FIXME: investigate the cost of this query
-        ChatChannel
+        Chat::Channel
           .includes(chatable: :users)
           .joins(direct_message: :direct_message_users)
           .group(1)
@@ -75,7 +76,7 @@ class Chat::Api::ChatChatablesController < Chat::Api
         users: users_without_channel,
         memberships: memberships,
       },
-      ChatChannelSearchSerializer,
+      Chat::ChannelSearchSerializer,
       root: false,
     )
   end

plugins/chat/app/controllers/chat/api/current_user_channels_controller.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class Chat::Api::CurrentUserChannelsController < Chat::ApiController
+  def index
+    structured = Chat::ChannelFetcher.structured(guardian)
+    render_serialized(structured, Chat::ChannelIndexSerializer, root: false)
+  end
+end

plugins/chat/app/controllers/chat/api_controller.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+module Chat
+  class ApiController < ::Chat::BaseController
+    before_action :ensure_logged_in
+    before_action :ensure_can_chat
+
+    include Chat::WithServiceHelper
+
+    private
+
+    def ensure_can_chat
+      raise Discourse::NotFound unless SiteSetting.chat_enabled
+      guardian.ensure_can_chat!
+    end
+
+    def default_actions_for_service
+      proc do
+        on_success { render(json: success_json) }
+        on_failure { render(json: failed_json, status: 422) }
+        on_failed_policy(:invalid_access) { raise Discourse::InvalidAccess }
+        on_failed_contract do
+          render(
+            json:
+              failed_json.merge(errors: result[:"result.contract.default"].errors.full_messages),
+            status: 400,
+          )
+        end
+      end
+    end
+  end
+end

plugins/chat/app/controllers/chat/base_controller.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module Chat
+  class BaseController < ::ApplicationController
+    before_action :ensure_logged_in
+    before_action :ensure_can_chat
+
+    private
+
+    def ensure_can_chat
+      raise Discourse::NotFound unless SiteSetting.chat_enabled
+      guardian.ensure_can_chat!
+    end
+
+    def set_channel_and_chatable_with_access_check(chat_channel_id: nil)
+      params.require(:chat_channel_id) if chat_channel_id.blank?
+      id_or_name = chat_channel_id || params[:chat_channel_id]
+      @chat_channel = Chat::ChannelFetcher.find_with_access_check(id_or_name, guardian)
+      @chatable = @chat_channel.chatable
+    end
+  end
+end

plugins/chat/app/controllers/chat/chat_controller.rb

@@ -0,0 +1,481 @@
+# frozen_string_literal: true
+
+module Chat
+  class ChatController < ::Chat::BaseController
+    PAST_MESSAGE_LIMIT = 40
+    FUTURE_MESSAGE_LIMIT = 40
+    PAST = "past"
+    FUTURE = "future"
+    CHAT_DIRECTIONS = [PAST, FUTURE]
+
+    # Other endpoints use set_channel_and_chatable_with_access_check, but
+    # these endpoints require a standalone find because they need to be
+    # able to get deleted channels and recover them.
+    before_action :find_chatable, only: %i[enable_chat disable_chat]
+    before_action :find_chat_message,
+                  only: %i[delete restore lookup_message edit_message rebake message_link]
+    before_action :set_channel_and_chatable_with_access_check,
+                  except: %i[
+                    respond
+                    enable_chat
+                    disable_chat
+                    message_link
+                    lookup_message
+                    set_user_chat_status
+                    dismiss_retention_reminder
+                    flag
+                  ]
+
+    def respond
+      render
+    end
+
+    def enable_chat
+      chat_channel = Chat::Channel.with_deleted.find_by(chatable_id: @chatable)
+
+      guardian.ensure_can_join_chat_channel!(chat_channel) if chat_channel
+
+      if chat_channel && chat_channel.trashed?
+        chat_channel.recover!
+      elsif chat_channel
+        return render_json_error I18n.t("chat.already_enabled")
+      else
+        chat_channel = @chatable.chat_channel
+        guardian.ensure_can_join_chat_channel!(chat_channel)
+      end
+
+      success = chat_channel.save
+      if success && chat_channel.chatable_has_custom_fields?
+        @chatable.custom_fields[Chat::HAS_CHAT_ENABLED] = true
+        @chatable.save!
+      end
+
+      if success
+        membership = Chat::ChannelMembershipManager.new(channel).follow(user)
+        render_serialized(chat_channel, Chat::ChannelSerializer, membership: membership)
+      else
+        render_json_error(chat_channel)
+      end
+
+      Chat::ChannelMembershipManager.new(channel).follow(user)
+    end
+
+    def disable_chat
+      chat_channel = Chat::Channel.with_deleted.find_by(chatable_id: @chatable)
+      guardian.ensure_can_join_chat_channel!(chat_channel)
+      return render json: success_json if chat_channel.trashed?
+      chat_channel.trash!(current_user)
+
+      success = chat_channel.save
+      if success
+        if chat_channel.chatable_has_custom_fields?
+          @chatable.custom_fields.delete(Chat::HAS_CHAT_ENABLED)
+          @chatable.save!
+        end
+
+        render json: success_json
+      else
+        render_json_error(chat_channel)
+      end
+    end
+
+    def create_message
+      raise Discourse::InvalidAccess if current_user.silenced?
+
+      Chat::MessageRateLimiter.run!(current_user)
+
+      @user_chat_channel_membership =
+        Chat::ChannelMembershipManager.new(@chat_channel).find_for_user(
+          current_user,
+          following: true,
+        )
+      raise Discourse::InvalidAccess unless @user_chat_channel_membership
+
+      reply_to_msg_id = params[:in_reply_to_id]
+      if reply_to_msg_id
+        rm = Chat::Message.find(reply_to_msg_id)
+        raise Discourse::NotFound if rm.chat_channel_id != @chat_channel.id
+      end
+
+      content = params[:message]
+
+      chat_message_creator =
+        Chat::MessageCreator.create(
+          chat_channel: @chat_channel,
+          user: current_user,
+          in_reply_to_id: reply_to_msg_id,
+          content: content,
+          staged_id: params[:staged_id],
+          upload_ids: params[:upload_ids],
+        )
+
+      return render_json_error(chat_message_creator.error) if chat_message_creator.failed?
+
+      @user_chat_channel_membership.update!(
+        last_read_message_id: chat_message_creator.chat_message.id,
+      )
+
+      if @chat_channel.direct_message_channel?
+        # If any of the channel users is ignoring, muting, or preventing DMs from
+        # the current user then we shold not auto-follow the channel once again or
+        # publish the new channel.
+        user_ids_allowing_communication =
+          UserCommScreener.new(
+            acting_user: current_user,
+            target_user_ids: @chat_channel.user_chat_channel_memberships.pluck(:user_id),
+          ).allowing_actor_communication
+
+        if user_ids_allowing_communication.any?
+          Chat::Publisher.publish_new_channel(
+            @chat_channel,
+            @chat_channel.chatable.users.where(id: user_ids_allowing_communication),
+          )
+
+          @chat_channel
+            .user_chat_channel_memberships
+            .where(user_id: user_ids_allowing_communication)
+            .update_all(following: true)
+        end
+      end
+
+      Chat::Publisher.publish_user_tracking_state(
+        current_user,
+        @chat_channel.id,
+        chat_message_creator.chat_message.id,
+      )
+      render json: success_json
+    end
+
+    def edit_message
+      chat_message_updater =
+        Chat::MessageUpdater.update(
+          guardian: guardian,
+          chat_message: @message,
+          new_content: params[:new_message],
+          upload_ids: params[:upload_ids] || [],
+        )
+
+      return render_json_error(chat_message_updater.error) if chat_message_updater.failed?
+
+      render json: success_json
+    end
+
+    def update_user_last_read
+      membership =
+        Chat::ChannelMembershipManager.new(@chat_channel).find_for_user(
+          current_user,
+          following: true,
+        )
+      raise Discourse::NotFound if membership.nil?
+
+      if membership.last_read_message_id &&
+           params[:message_id].to_i < membership.last_read_message_id
+        raise Discourse::InvalidParameters.new(:message_id)
+      end
+
+      unless Chat::Message.with_deleted.exists?(
+               chat_channel_id: @chat_channel.id,
+               id: params[:message_id],
+             )
+        raise Discourse::NotFound
+      end
+
+      membership.update!(last_read_message_id: params[:message_id])
+
+      Notification
+        .where(notification_type: Notification.types[:chat_mention])
+        .where(user: current_user)
+        .where(read: false)
+        .joins("INNER JOIN chat_mentions ON chat_mentions.notification_id = notifications.id")
+        .joins("INNER JOIN chat_messages ON chat_mentions.chat_message_id = chat_messages.id")
+        .where("chat_messages.id <= ?", params[:message_id].to_i)
+        .where("chat_messages.chat_channel_id = ?", @chat_channel.id)
+        .update_all(read: true)
+
+      Chat::Publisher.publish_user_tracking_state(
+        current_user,
+        @chat_channel.id,
+        params[:message_id],
+      )
+
+      render json: success_json
+    end
+
+    def messages
+      page_size = params[:page_size]&.to_i || 1000
+      direction = params[:direction].to_s
+      message_id = params[:message_id]
+      if page_size > 50 ||
+           (
+             message_id.blank? ^ direction.blank? &&
+               (direction.present? && !CHAT_DIRECTIONS.include?(direction))
+           )
+        raise Discourse::InvalidParameters
+      end
+
+      messages = preloaded_chat_message_query.where(chat_channel: @chat_channel)
+      messages = messages.with_deleted if guardian.can_moderate_chat?(@chatable)
+
+      if message_id.present?
+        condition = direction == PAST ? "<" : ">"
+        messages = messages.where("id #{condition} ?", message_id.to_i)
+      end
+
+      # NOTE: This order is reversed when we return the Chat::View below if the direction
+      # is not FUTURE.
+      order = direction == FUTURE ? "ASC" : "DESC"
+      messages = messages.order("created_at #{order}, id #{order}").limit(page_size).to_a
+
+      can_load_more_past = nil
+      can_load_more_future = nil
+
+      if direction == FUTURE
+        can_load_more_future = messages.size == page_size
+      elsif direction == PAST
+        can_load_more_past = messages.size == page_size
+      else
+        # When direction is blank, we'll return the latest messages.
+        can_load_more_future = false
+        can_load_more_past = messages.size == page_size
+      end
+
+      chat_view =
+        Chat::View.new(
+          chat_channel: @chat_channel,
+          chat_messages: direction == FUTURE ? messages : messages.reverse,
+          user: current_user,
+          can_load_more_past: can_load_more_past,
+          can_load_more_future: can_load_more_future,
+        )
+      render_serialized(chat_view, Chat::ViewSerializer, root: false)
+    end
+
+    def react
+      params.require(%i[message_id emoji react_action])
+      guardian.ensure_can_react!
+
+      Chat::MessageReactor.new(current_user, @chat_channel).react!(
+        message_id: params[:message_id],
+        react_action: params[:react_action].to_sym,
+        emoji: params[:emoji],
+      )
+
+      render json: success_json
+    end
+
+    def delete
+      guardian.ensure_can_delete_chat!(@message, @chatable)
+
+      Chat::MessageDestroyer.new.trash_message(@message, current_user)
+
+      head :ok
+    end
+
+    def restore
+      chat_channel = @message.chat_channel
+      guardian.ensure_can_restore_chat!(@message, chat_channel.chatable)
+      updated = @message.recover!
+      if updated
+        Chat::Publisher.publish_restore!(chat_channel, @message)
+        render json: success_json
+      else
+        render_json_error(@message)
+      end
+    end
+
+    def rebake
+      guardian.ensure_can_rebake_chat_message!(@message)
+      @message.rebake!(invalidate_oneboxes: true)
+      render json: success_json
+    end
+
+    def message_link
+      raise Discourse::NotFound if @message.blank? || @message.deleted_at.present?
+      raise Discourse::NotFound if @message.chat_channel.blank?
+      set_channel_and_chatable_with_access_check(chat_channel_id: @message.chat_channel_id)
+      render json:
+               success_json.merge(
+                 chat_channel_id: @chat_channel.id,
+                 chat_channel_title: @chat_channel.title(current_user),
+               )
+    end
+
+    def lookup_message
+      set_channel_and_chatable_with_access_check(chat_channel_id: @message.chat_channel_id)
+
+      messages = preloaded_chat_message_query.where(chat_channel: @chat_channel)
+      messages = messages.with_deleted if guardian.can_moderate_chat?(@chatable)
+
+      past_messages =
+        messages
+          .where("created_at < ?", @message.created_at)
+          .order(created_at: :desc)
+          .limit(PAST_MESSAGE_LIMIT)
+
+      future_messages =
+        messages
+          .where("created_at > ?", @message.created_at)
+          .order(created_at: :asc)
+          .limit(FUTURE_MESSAGE_LIMIT)
+
+      can_load_more_past = past_messages.count == PAST_MESSAGE_LIMIT
+      can_load_more_future = future_messages.count == FUTURE_MESSAGE_LIMIT
+      messages = [past_messages.reverse, [@message], future_messages].reduce([], :concat)
+      chat_view =
+        Chat::View.new(
+          chat_channel: @chat_channel,
+          chat_messages: messages,
+          user: current_user,
+          can_load_more_past: can_load_more_past,
+          can_load_more_future: can_load_more_future,
+        )
+      render_serialized(chat_view, Chat::ViewSerializer, root: false)
+    end
+
+    def set_user_chat_status
+      params.require(:chat_enabled)
+
+      current_user.user_option.update(chat_enabled: params[:chat_enabled])
+      render json: { chat_enabled: current_user.user_option.chat_enabled }
+    end
+
+    def invite_users
+      params.require(:user_ids)
+
+      users =
+        User
+          .includes(:groups)
+          .joins(:user_option)
+          .where(user_options: { chat_enabled: true })
+          .not_suspended
+          .where(id: params[:user_ids])
+      users.each do |user|
+        guardian = Guardian.new(user)
+        if guardian.can_chat? && guardian.can_join_chat_channel?(@chat_channel)
+          data = {
+            message: "chat.invitation_notification",
+            chat_channel_id: @chat_channel.id,
+            chat_channel_title: @chat_channel.title(user),
+            chat_channel_slug: @chat_channel.slug,
+            invited_by_username: current_user.username,
+          }
+          data[:chat_message_id] = params[:chat_message_id] if params[:chat_message_id]
+          user.notifications.create(
+            notification_type: Notification.types[:chat_invitation],
+            high_priority: true,
+            data: data.to_json,
+          )
+        end
+      end
+
+      render json: success_json
+    end
+
+    def dismiss_retention_reminder
+      params.require(:chatable_type)
+      guardian.ensure_can_chat!
+      unless Chat::Channel.chatable_types.include?(params[:chatable_type])
+        raise Discourse::InvalidParameters
+      end
+
+      field =
+        (
+          if Chat::Channel.public_channel_chatable_types.include?(params[:chatable_type])
+            :dismissed_channel_retention_reminder
+          else
+            :dismissed_dm_retention_reminder
+          end
+        )
+      current_user.user_option.update(field => true)
+      render json: success_json
+    end
+
+    def quote_messages
+      params.require(:message_ids)
+
+      message_ids = params[:message_ids].map(&:to_i)
+      markdown =
+        Chat::TranscriptService.new(
+          @chat_channel,
+          current_user,
+          messages_or_ids: message_ids,
+        ).generate_markdown
+      render json: success_json.merge(markdown: markdown)
+    end
+
+    def flag
+      RateLimiter.new(current_user, "flag_chat_message", 4, 1.minutes).performed!
+
+      permitted_params =
+        params.permit(
+          %i[chat_message_id flag_type_id message is_warning take_action queue_for_review],
+        )
+
+      chat_message =
+        Chat::Message.includes(:chat_channel, :revisions).find(permitted_params[:chat_message_id])
+
+      flag_type_id = permitted_params[:flag_type_id].to_i
+
+      if !ReviewableScore.types.values.include?(flag_type_id)
+        raise Discourse::InvalidParameters.new(:flag_type_id)
+      end
+
+      set_channel_and_chatable_with_access_check(chat_channel_id: chat_message.chat_channel_id)
+
+      result =
+        Chat::ReviewQueue.new.flag_message(chat_message, guardian, flag_type_id, permitted_params)
+
+      if result[:success]
+        render json: success_json
+      else
+        render_json_error(result[:errors])
+      end
+    end
+
+    def set_draft
+      if params[:data].present?
+        Chat::Draft.find_or_initialize_by(
+          user: current_user,
+          chat_channel_id: @chat_channel.id,
+        ).update!(data: params[:data])
+      else
+        Chat::Draft.where(user: current_user, chat_channel_id: @chat_channel.id).destroy_all
+      end
+
+      render json: success_json
+    end
+
+    private
+
+    def preloaded_chat_message_query
+      query =
+        Chat::Message
+          .includes(in_reply_to: [:user, chat_webhook_event: [:incoming_chat_webhook]])
+          .includes(:revisions)
+          .includes(user: :primary_group)
+          .includes(chat_webhook_event: :incoming_chat_webhook)
+          .includes(reactions: :user)
+          .includes(:bookmarks)
+          .includes(:uploads)
+          .includes(chat_channel: :chatable)
+
+      query = query.includes(user: :user_status) if SiteSetting.enable_user_status
+
+      query
+    end
+
+    def find_chatable
+      @chatable = Category.find_by(id: params[:chatable_id])
+      guardian.ensure_can_moderate_chat!(@chatable)
+    end
+
+    def find_chat_message
+      @message = preloaded_chat_message_query.with_deleted
+      @message = @message.where(chat_channel_id: params[:chat_channel_id]) if params[
+        :chat_channel_id
+      ]
+      @message = @message.find_by(id: params[:message_id])
+      raise Discourse::NotFound unless @message
+    end
+  end
+end

plugins/chat/app/controllers/chat/direct_messages_controller.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+module Chat
+  class DirectMessagesController < ::Chat::BaseController
+    # NOTE: For V1 of chat channel archiving and deleting we are not doing
+    # anything for DM channels, their behaviour will stay as is.
+    def create
+      guardian.ensure_can_chat!
+      users = users_from_usernames(current_user, params)
+
+      begin
+        chat_channel =
+          Chat::DirectMessageChannelCreator.create!(acting_user: current_user, target_users: users)
+        render_serialized(
+          chat_channel,
+          Chat::ChannelSerializer,
+          root: "channel",
+          membership: chat_channel.membership_for(current_user),
+        )
+      rescue Chat::DirectMessageChannelCreator::NotAllowed => err
+        render_json_error(err.message)
+      end
+    end
+
+    def index
+      guardian.ensure_can_chat!
+      users = users_from_usernames(current_user, params)
+
+      direct_message = Chat::DirectMessage.for_user_ids(users.map(&:id).uniq)
+      if direct_message
+        chat_channel = Chat::Channel.find_by(chatable_id: direct_message)
+        render_serialized(
+          chat_channel,
+          Chat::ChannelSerializer,
+          root: "channel",
+          membership: chat_channel.membership_for(current_user),
+        )
+      else
+        render body: nil, status: 404
+      end
+    end
+
+    private
+
+    def users_from_usernames(current_user, params)
+      params.require(:usernames)
+
+      usernames =
+        (params[:usernames].is_a?(String) ? params[:usernames].split(",") : params[:usernames])
+
+      users = [current_user]
+      other_usernames = usernames - [current_user.username]
+      users.concat(User.where(username: other_usernames).to_a) if other_usernames.any?
+      users
+    end
+  end
+end

plugins/chat/app/controllers/chat/emojis_controller.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Chat
+  class EmojisController < ::Chat::BaseController
+    def index
+      emojis = Emoji.all.group_by(&:group)
+      render json: MultiJson.dump(emojis)
+    end
+  end
+end

plugins/chat/app/controllers/chat/incoming_webhooks_controller.rb

@@ -0,0 +1,113 @@
+# frozen_string_literal: true
+
+module Chat
+  class IncomingWebhooksController < ::ApplicationController
+    WEBHOOK_MESSAGES_PER_MINUTE_LIMIT = 10
+
+    skip_before_action :verify_authenticity_token, :redirect_to_login_if_required
+
+    before_action :validate_payload
+
+    def create_message
+      debug_payload
+
+      process_webhook_payload(text: params[:text], key: params[:key])
+    end
+
+    # See https://api.slack.com/reference/messaging/payload for the
+    # slack message payload format. For now we only support the
+    # text param, which we preprocess lightly to remove the slack-isms
+    # in the formatting.
+    def create_message_slack_compatible
+      debug_payload
+
+      # See note in validate_payload on why this is needed
+      attachments =
+        if params[:payload].present?
+          payload = params[:payload]
+          if String === payload
+            payload = JSON.parse(payload)
+            payload.deep_symbolize_keys!
+          end
+          payload[:attachments]
+        else
+          params[:attachments]
+        end
+
+      if params[:text].present?
+        text = Chat::SlackCompatibility.process_text(params[:text])
+      else
+        text = Chat::SlackCompatibility.process_legacy_attachments(attachments)
+      end
+
+      process_webhook_payload(text: text, key: params[:key])
+    rescue JSON::ParserError
+      raise Discourse::InvalidParameters
+    end
+
+    private
+
+    def process_webhook_payload(text:, key:)
+      validate_message_length(text)
+      webhook = find_and_rate_limit_webhook(key)
+
+      chat_message_creator =
+        Chat::MessageCreator.create(
+          chat_channel: webhook.chat_channel,
+          user: Discourse.system_user,
+          content: text,
+          incoming_chat_webhook: webhook,
+        )
+      if chat_message_creator.failed?
+        render_json_error(chat_message_creator.error)
+      else
+        render json: success_json
+      end
+    end
+
+    def find_and_rate_limit_webhook(key)
+      webhook = Chat::IncomingWebhook.includes(:chat_channel).find_by(key: key)
+      raise Discourse::NotFound unless webhook
+
+      # Rate limit to 10 messages per-minute. We can move to a site setting in the future if needed.
+      RateLimiter.new(
+        nil,
+        "incoming_chat_webhook_#{webhook.id}",
+        WEBHOOK_MESSAGES_PER_MINUTE_LIMIT,
+        1.minute,
+      ).performed!
+      webhook
+    end
+
+    def validate_message_length(message)
+      return if message.length <= SiteSetting.chat_maximum_message_length
+      raise Discourse::InvalidParameters.new(
+              "Body cannot be over #{SiteSetting.chat_maximum_message_length} characters",
+            )
+    end
+
+    # The webhook POST body can be in 3 different formats:
+    #
+    # * { text: "message text" }, which is the most basic method, and also mirrors Slack payloads
+    # * { attachments: [ text: "message text" ] }, which is a variant of Slack payloads using legacy attachments
+    # * { payload: "<JSON STRING>", attachments: null, text: null }, where JSON STRING can look
+    #   like the `attachments` example above (along with other attributes), which is fired by OpsGenie
+    def validate_payload
+      params.require(:key)
+
+      if !params[:text] && !params[:payload] && !params[:attachments]
+        raise Discourse::InvalidParameters
+      end
+    end
+
+    def debug_payload
+      return if !SiteSetting.chat_debug_webhook_payloads
+      Rails.logger.warn(
+        "Debugging chat webhook payload for endpoint #{params[:key]}: " +
+          JSON.dump(
+            { payload: params[:payload], attachments: params[:attachments], text: params[:text] },
+          ),
+      )
+    end
+  end
+end

plugins/chat/app/controllers/chat_base_controller.rb

@@ -1,20 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::ChatBaseController < ::ApplicationController
-  before_action :ensure_logged_in
-  before_action :ensure_can_chat
-
-  private
-
-  def ensure_can_chat
-    raise Discourse::NotFound unless SiteSetting.chat_enabled
-    guardian.ensure_can_chat!
-  end
-
-  def set_channel_and_chatable_with_access_check(chat_channel_id: nil)
-    params.require(:chat_channel_id) if chat_channel_id.blank?
-    id_or_name = chat_channel_id || params[:chat_channel_id]
-    @chat_channel = Chat::ChatChannelFetcher.find_with_access_check(id_or_name, guardian)
-    @chatable = @chat_channel.chatable
-  end
-end

plugins/chat/app/controllers/chat_controller.rb

@@ -1,472 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::ChatController < Chat::ChatBaseController
-  PAST_MESSAGE_LIMIT = 40
-  FUTURE_MESSAGE_LIMIT = 40
-  PAST = "past"
-  FUTURE = "future"
-  CHAT_DIRECTIONS = [PAST, FUTURE]
-
-  # Other endpoints use set_channel_and_chatable_with_access_check, but
-  # these endpoints require a standalone find because they need to be
-  # able to get deleted channels and recover them.
-  before_action :find_chatable, only: %i[enable_chat disable_chat]
-  before_action :find_chat_message,
-                only: %i[delete restore lookup_message edit_message rebake message_link]
-  before_action :set_channel_and_chatable_with_access_check,
-                except: %i[
-                  respond
-                  enable_chat
-                  disable_chat
-                  message_link
-                  lookup_message
-                  set_user_chat_status
-                  dismiss_retention_reminder
-                  flag
-                ]
-
-  def respond
-    render
-  end
-
-  def enable_chat
-    chat_channel = ChatChannel.with_deleted.find_by(chatable: @chatable)
-
-    guardian.ensure_can_join_chat_channel!(chat_channel) if chat_channel
-
-    if chat_channel && chat_channel.trashed?
-      chat_channel.recover!
-    elsif chat_channel
-      return render_json_error I18n.t("chat.already_enabled")
-    else
-      chat_channel = @chatable.chat_channel
-      guardian.ensure_can_join_chat_channel!(chat_channel)
-    end
-
-    success = chat_channel.save
-    if success && chat_channel.chatable_has_custom_fields?
-      @chatable.custom_fields[Chat::HAS_CHAT_ENABLED] = true
-      @chatable.save!
-    end
-
-    if success
-      membership = Chat::ChatChannelMembershipManager.new(channel).follow(user)
-      render_serialized(chat_channel, ChatChannelSerializer, membership: membership)
-    else
-      render_json_error(chat_channel)
-    end
-
-    Chat::ChatChannelMembershipManager.new(channel).follow(user)
-  end
-
-  def disable_chat
-    chat_channel = ChatChannel.with_deleted.find_by(chatable: @chatable)
-    guardian.ensure_can_join_chat_channel!(chat_channel)
-    return render json: success_json if chat_channel.trashed?
-    chat_channel.trash!(current_user)
-
-    success = chat_channel.save
-    if success
-      if chat_channel.chatable_has_custom_fields?
-        @chatable.custom_fields.delete(Chat::HAS_CHAT_ENABLED)
-        @chatable.save!
-      end
-
-      render json: success_json
-    else
-      render_json_error(chat_channel)
-    end
-  end
-
-  def create_message
-    raise Discourse::InvalidAccess if current_user.silenced?
-
-    Chat::ChatMessageRateLimiter.run!(current_user)
-
-    @user_chat_channel_membership =
-      Chat::ChatChannelMembershipManager.new(@chat_channel).find_for_user(
-        current_user,
-        following: true,
-      )
-    raise Discourse::InvalidAccess unless @user_chat_channel_membership
-
-    reply_to_msg_id = params[:in_reply_to_id]
-    if reply_to_msg_id
-      rm = ChatMessage.find(reply_to_msg_id)
-      raise Discourse::NotFound if rm.chat_channel_id != @chat_channel.id
-    end
-
-    content = params[:message]
-
-    chat_message_creator =
-      Chat::ChatMessageCreator.create(
-        chat_channel: @chat_channel,
-        user: current_user,
-        in_reply_to_id: reply_to_msg_id,
-        content: content,
-        staged_id: params[:staged_id],
-        upload_ids: params[:upload_ids],
-      )
-
-    return render_json_error(chat_message_creator.error) if chat_message_creator.failed?
-
-    @user_chat_channel_membership.update!(
-      last_read_message_id: chat_message_creator.chat_message.id,
-    )
-
-    if @chat_channel.direct_message_channel?
-      # If any of the channel users is ignoring, muting, or preventing DMs from
-      # the current user then we shold not auto-follow the channel once again or
-      # publish the new channel.
-      user_ids_allowing_communication =
-        UserCommScreener.new(
-          acting_user: current_user,
-          target_user_ids: @chat_channel.user_chat_channel_memberships.pluck(:user_id),
-        ).allowing_actor_communication
-
-      if user_ids_allowing_communication.any?
-        ChatPublisher.publish_new_channel(
-          @chat_channel,
-          @chat_channel.chatable.users.where(id: user_ids_allowing_communication),
-        )
-
-        @chat_channel
-          .user_chat_channel_memberships
-          .where(user_id: user_ids_allowing_communication)
-          .update_all(following: true)
-      end
-    end
-
-    ChatPublisher.publish_user_tracking_state(
-      current_user,
-      @chat_channel.id,
-      chat_message_creator.chat_message.id,
-    )
-    render json: success_json
-  end
-
-  def edit_message
-    chat_message_updater =
-      Chat::ChatMessageUpdater.update(
-        guardian: guardian,
-        chat_message: @message,
-        new_content: params[:new_message],
-        upload_ids: params[:upload_ids] || [],
-      )
-
-    return render_json_error(chat_message_updater.error) if chat_message_updater.failed?
-
-    render json: success_json
-  end
-
-  def update_user_last_read
-    membership =
-      Chat::ChatChannelMembershipManager.new(@chat_channel).find_for_user(
-        current_user,
-        following: true,
-      )
-    raise Discourse::NotFound if membership.nil?
-
-    if membership.last_read_message_id && params[:message_id].to_i < membership.last_read_message_id
-      raise Discourse::InvalidParameters.new(:message_id)
-    end
-
-    unless ChatMessage.with_deleted.exists?(
-             chat_channel_id: @chat_channel.id,
-             id: params[:message_id],
-           )
-      raise Discourse::NotFound
-    end
-
-    membership.update!(last_read_message_id: params[:message_id])
-
-    Notification
-      .where(notification_type: Notification.types[:chat_mention])
-      .where(user: current_user)
-      .where(read: false)
-      .joins("INNER JOIN chat_mentions ON chat_mentions.notification_id = notifications.id")
-      .joins("INNER JOIN chat_messages ON chat_mentions.chat_message_id = chat_messages.id")
-      .where("chat_messages.id <= ?", params[:message_id].to_i)
-      .where("chat_messages.chat_channel_id = ?", @chat_channel.id)
-      .update_all(read: true)
-
-    ChatPublisher.publish_user_tracking_state(current_user, @chat_channel.id, params[:message_id])
-
-    render json: success_json
-  end
-
-  def messages
-    page_size = params[:page_size]&.to_i || 1000
-    direction = params[:direction].to_s
-    message_id = params[:message_id]
-    if page_size > 50 ||
-         (
-           message_id.blank? ^ direction.blank? &&
-             (direction.present? && !CHAT_DIRECTIONS.include?(direction))
-         )
-      raise Discourse::InvalidParameters
-    end
-
-    messages = preloaded_chat_message_query.where(chat_channel: @chat_channel)
-    messages = messages.with_deleted if guardian.can_moderate_chat?(@chatable)
-
-    if message_id.present?
-      condition = direction == PAST ? "<" : ">"
-      messages = messages.where("id #{condition} ?", message_id.to_i)
-    end
-
-    # NOTE: This order is reversed when we return the ChatView below if the direction
-    # is not FUTURE.
-    order = direction == FUTURE ? "ASC" : "DESC"
-    messages = messages.order("created_at #{order}, id #{order}").limit(page_size).to_a
-
-    can_load_more_past = nil
-    can_load_more_future = nil
-
-    if direction == FUTURE
-      can_load_more_future = messages.size == page_size
-    elsif direction == PAST
-      can_load_more_past = messages.size == page_size
-    else
-      # When direction is blank, we'll return the latest messages.
-      can_load_more_future = false
-      can_load_more_past = messages.size == page_size
-    end
-
-    chat_view =
-      ChatView.new(
-        chat_channel: @chat_channel,
-        chat_messages: direction == FUTURE ? messages : messages.reverse,
-        user: current_user,
-        can_load_more_past: can_load_more_past,
-        can_load_more_future: can_load_more_future,
-      )
-    render_serialized(chat_view, ChatViewSerializer, root: false)
-  end
-
-  def react
-    params.require(%i[message_id emoji react_action])
-    guardian.ensure_can_react!
-
-    Chat::ChatMessageReactor.new(current_user, @chat_channel).react!(
-      message_id: params[:message_id],
-      react_action: params[:react_action].to_sym,
-      emoji: params[:emoji],
-    )
-
-    render json: success_json
-  end
-
-  def delete
-    guardian.ensure_can_delete_chat!(@message, @chatable)
-
-    ChatMessageDestroyer.new.trash_message(@message, current_user)
-
-    head :ok
-  end
-
-  def restore
-    chat_channel = @message.chat_channel
-    guardian.ensure_can_restore_chat!(@message, chat_channel.chatable)
-    updated = @message.recover!
-    if updated
-      ChatPublisher.publish_restore!(chat_channel, @message)
-      render json: success_json
-    else
-      render_json_error(@message)
-    end
-  end
-
-  def rebake
-    guardian.ensure_can_rebake_chat_message!(@message)
-    @message.rebake!(invalidate_oneboxes: true)
-    render json: success_json
-  end
-
-  def message_link
-    raise Discourse::NotFound if @message.blank? || @message.deleted_at.present?
-    raise Discourse::NotFound if @message.chat_channel.blank?
-    set_channel_and_chatable_with_access_check(chat_channel_id: @message.chat_channel_id)
-    render json:
-             success_json.merge(
-               chat_channel_id: @chat_channel.id,
-               chat_channel_title: @chat_channel.title(current_user),
-             )
-  end
-
-  def lookup_message
-    set_channel_and_chatable_with_access_check(chat_channel_id: @message.chat_channel_id)
-
-    messages = preloaded_chat_message_query.where(chat_channel: @chat_channel)
-    messages = messages.with_deleted if guardian.can_moderate_chat?(@chatable)
-
-    past_messages =
-      messages
-        .where("created_at < ?", @message.created_at)
-        .order(created_at: :desc)
-        .limit(PAST_MESSAGE_LIMIT)
-
-    future_messages =
-      messages
-        .where("created_at > ?", @message.created_at)
-        .order(created_at: :asc)
-        .limit(FUTURE_MESSAGE_LIMIT)
-
-    can_load_more_past = past_messages.count == PAST_MESSAGE_LIMIT
-    can_load_more_future = future_messages.count == FUTURE_MESSAGE_LIMIT
-    messages = [past_messages.reverse, [@message], future_messages].reduce([], :concat)
-    chat_view =
-      ChatView.new(
-        chat_channel: @chat_channel,
-        chat_messages: messages,
-        user: current_user,
-        can_load_more_past: can_load_more_past,
-        can_load_more_future: can_load_more_future,
-      )
-    render_serialized(chat_view, ChatViewSerializer, root: false)
-  end
-
-  def set_user_chat_status
-    params.require(:chat_enabled)
-
-    current_user.user_option.update(chat_enabled: params[:chat_enabled])
-    render json: { chat_enabled: current_user.user_option.chat_enabled }
-  end
-
-  def invite_users
-    params.require(:user_ids)
-
-    users =
-      User
-        .includes(:groups)
-        .joins(:user_option)
-        .where(user_options: { chat_enabled: true })
-        .not_suspended
-        .where(id: params[:user_ids])
-    users.each do |user|
-      guardian = Guardian.new(user)
-      if guardian.can_chat? && guardian.can_join_chat_channel?(@chat_channel)
-        data = {
-          message: "chat.invitation_notification",
-          chat_channel_id: @chat_channel.id,
-          chat_channel_title: @chat_channel.title(user),
-          chat_channel_slug: @chat_channel.slug,
-          invited_by_username: current_user.username,
-        }
-        data[:chat_message_id] = params[:chat_message_id] if params[:chat_message_id]
-        user.notifications.create(
-          notification_type: Notification.types[:chat_invitation],
-          high_priority: true,
-          data: data.to_json,
-        )
-      end
-    end
-
-    render json: success_json
-  end
-
-  def dismiss_retention_reminder
-    params.require(:chatable_type)
-    guardian.ensure_can_chat!
-    unless ChatChannel.chatable_types.include?(params[:chatable_type])
-      raise Discourse::InvalidParameters
-    end
-
-    field =
-      (
-        if ChatChannel.public_channel_chatable_types.include?(params[:chatable_type])
-          :dismissed_channel_retention_reminder
-        else
-          :dismissed_dm_retention_reminder
-        end
-      )
-    current_user.user_option.update(field => true)
-    render json: success_json
-  end
-
-  def quote_messages
-    params.require(:message_ids)
-
-    message_ids = params[:message_ids].map(&:to_i)
-    markdown =
-      ChatTranscriptService.new(
-        @chat_channel,
-        current_user,
-        messages_or_ids: message_ids,
-      ).generate_markdown
-    render json: success_json.merge(markdown: markdown)
-  end
-
-  def flag
-    RateLimiter.new(current_user, "flag_chat_message", 4, 1.minutes).performed!
-
-    permitted_params =
-      params.permit(
-        %i[chat_message_id flag_type_id message is_warning take_action queue_for_review],
-      )
-
-    chat_message =
-      ChatMessage.includes(:chat_channel, :revisions).find(permitted_params[:chat_message_id])
-
-    flag_type_id = permitted_params[:flag_type_id].to_i
-
-    if !ReviewableScore.types.values.include?(flag_type_id)
-      raise Discourse::InvalidParameters.new(:flag_type_id)
-    end
-
-    set_channel_and_chatable_with_access_check(chat_channel_id: chat_message.chat_channel_id)
-
-    result =
-      Chat::ChatReviewQueue.new.flag_message(chat_message, guardian, flag_type_id, permitted_params)
-
-    if result[:success]
-      render json: success_json
-    else
-      render_json_error(result[:errors])
-    end
-  end
-
-  def set_draft
-    if params[:data].present?
-      ChatDraft.find_or_initialize_by(
-        user: current_user,
-        chat_channel_id: @chat_channel.id,
-      ).update!(data: params[:data])
-    else
-      ChatDraft.where(user: current_user, chat_channel_id: @chat_channel.id).destroy_all
-    end
-
-    render json: success_json
-  end
-
-  private
-
-  def preloaded_chat_message_query
-    query =
-      ChatMessage
-        .includes(in_reply_to: [:user, chat_webhook_event: [:incoming_chat_webhook]])
-        .includes(:revisions)
-        .includes(user: :primary_group)
-        .includes(chat_webhook_event: :incoming_chat_webhook)
-        .includes(reactions: :user)
-        .includes(:bookmarks)
-        .includes(:uploads)
-        .includes(chat_channel: :chatable)
-
-    query = query.includes(user: :user_status) if SiteSetting.enable_user_status
-
-    query
-  end
-
-  def find_chatable
-    @chatable = Category.find_by(id: params[:chatable_id])
-    guardian.ensure_can_moderate_chat!(@chatable)
-  end
-
-  def find_chat_message
-    @message = preloaded_chat_message_query.with_deleted
-    @message = @message.where(chat_channel_id: params[:chat_channel_id]) if params[:chat_channel_id]
-    @message = @message.find_by(id: params[:message_id])
-    raise Discourse::NotFound unless @message
-  end
-end

plugins/chat/app/controllers/direct_messages_controller.rb

@@ -1,55 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::DirectMessagesController < Chat::ChatBaseController
-  # NOTE: For V1 of chat channel archiving and deleting we are not doing
-  # anything for DM channels, their behaviour will stay as is.
-  def create
-    guardian.ensure_can_chat!
-    users = users_from_usernames(current_user, params)
-
-    begin
-      chat_channel =
-        Chat::DirectMessageChannelCreator.create!(acting_user: current_user, target_users: users)
-      render_serialized(
-        chat_channel,
-        ChatChannelSerializer,
-        root: "channel",
-        membership: chat_channel.membership_for(current_user),
-      )
-    rescue Chat::DirectMessageChannelCreator::NotAllowed => err
-      render_json_error(err.message)
-    end
-  end
-
-  def index
-    guardian.ensure_can_chat!
-    users = users_from_usernames(current_user, params)
-
-    direct_message = DirectMessage.for_user_ids(users.map(&:id).uniq)
-    if direct_message
-      chat_channel = ChatChannel.find_by(chatable: direct_message)
-      render_serialized(
-        chat_channel,
-        ChatChannelSerializer,
-        root: "channel",
-        membership: chat_channel.membership_for(current_user),
-      )
-    else
-      render body: nil, status: 404
-    end
-  end
-
-  private
-
-  def users_from_usernames(current_user, params)
-    params.require(:usernames)
-
-    usernames =
-      (params[:usernames].is_a?(String) ? params[:usernames].split(",") : params[:usernames])
-
-    users = [current_user]
-    other_usernames = usernames - [current_user.username]
-    users.concat(User.where(username: other_usernames).to_a) if other_usernames.any?
-    users
-  end
-end

plugins/chat/app/controllers/emojis_controller.rb

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::EmojisController < Chat::ChatBaseController
-  def index
-    emojis = Emoji.all.group_by(&:group)
-    render json: MultiJson.dump(emojis)
-  end
-end

plugins/chat/app/controllers/incoming_chat_webhooks_controller.rb

@@ -1,111 +0,0 @@
-# frozen_string_literal: true
-
-class Chat::IncomingChatWebhooksController < ApplicationController
-  WEBHOOK_MESSAGES_PER_MINUTE_LIMIT = 10
-
-  skip_before_action :verify_authenticity_token, :redirect_to_login_if_required
-
-  before_action :validate_payload
-
-  def create_message
-    debug_payload
-
-    process_webhook_payload(text: params[:text], key: params[:key])
-  end
-
-  # See https://api.slack.com/reference/messaging/payload for the
-  # slack message payload format. For now we only support the
-  # text param, which we preprocess lightly to remove the slack-isms
-  # in the formatting.
-  def create_message_slack_compatible
-    debug_payload
-
-    # See note in validate_payload on why this is needed
-    attachments =
-      if params[:payload].present?
-        payload = params[:payload]
-        if String === payload
-          payload = JSON.parse(payload)
-          payload.deep_symbolize_keys!
-        end
-        payload[:attachments]
-      else
-        params[:attachments]
-      end
-
-    if params[:text].present?
-      text = Chat::SlackCompatibility.process_text(params[:text])
-    else
-      text = Chat::SlackCompatibility.process_legacy_attachments(attachments)
-    end
-
-    process_webhook_payload(text: text, key: params[:key])
-  rescue JSON::ParserError
-    raise Discourse::InvalidParameters
-  end
-
-  private
-
-  def process_webhook_payload(text:, key:)
-    validate_message_length(text)
-    webhook = find_and_rate_limit_webhook(key)
-
-    chat_message_creator =
-      Chat::ChatMessageCreator.create(
-        chat_channel: webhook.chat_channel,
-        user: Discourse.system_user,
-        content: text,
-        incoming_chat_webhook: webhook,
-      )
-    if chat_message_creator.failed?
-      render_json_error(chat_message_creator.error)
-    else
-      render json: success_json
-    end
-  end
-
-  def find_and_rate_limit_webhook(key)
-    webhook = IncomingChatWebhook.includes(:chat_channel).find_by(key: key)
-    raise Discourse::NotFound unless webhook
-
-    # Rate limit to 10 messages per-minute. We can move to a site setting in the future if needed.
-    RateLimiter.new(
-      nil,
-      "incoming_chat_webhook_#{webhook.id}",
-      WEBHOOK_MESSAGES_PER_MINUTE_LIMIT,
-      1.minute,
-    ).performed!
-    webhook
-  end
-
-  def validate_message_length(message)
-    return if message.length <= SiteSetting.chat_maximum_message_length
-    raise Discourse::InvalidParameters.new(
-            "Body cannot be over #{SiteSetting.chat_maximum_message_length} characters",
-          )
-  end
-
-  # The webhook POST body can be in 3 different formats:
-  #
-  # * { text: "message text" }, which is the most basic method, and also mirrors Slack payloads
-  # * { attachments: [ text: "message text" ] }, which is a variant of Slack payloads using legacy attachments
-  # * { payload: "<JSON STRING>", attachments: null, text: null }, where JSON STRING can look
-  #   like the `attachments` example above (along with other attributes), which is fired by OpsGenie
-  def validate_payload
-    params.require(:key)
-
-    if !params[:text] && !params[:payload] && !params[:attachments]
-      raise Discourse::InvalidParameters
-    end
-  end
-
-  def debug_payload
-    return if !SiteSetting.chat_debug_webhook_payloads
-    Rails.logger.warn(
-      "Debugging chat webhook payload for endpoint #{params[:key]}: " +
-        JSON.dump(
-          { payload: params[:payload], attachments: params[:attachments], text: params[:text] },
-        ),
-    )
-  end
-end

plugins/chat/app/core_ext/plugin_instance.rb

@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-DiscoursePluginRegistry.define_register(:chat_markdown_features, Set)
-
-class Plugin::Instance
-  def chat
-    ChatPluginApiExtensions
-  end
-
-  module ChatPluginApiExtensions
-    def self.enable_markdown_feature(name)
-      DiscoursePluginRegistry.chat_markdown_features << name
-    end
-  end
-end

plugins/chat/app/helpers/chat/with_service_helper.rb

@@ -12,7 +12,7 @@ module Chat
           instance_exec(&object.method(:default_actions_for_service).call) if default_actions
           instance_exec(&(block || proc {}))
         end
-      Chat::ServiceRunner.call(service, object, **dependencies, &merged_block)
+      ServiceRunner.call(service, object, **dependencies, &merged_block)
     end
 
     def run_service(service, dependencies)

plugins/chat/app/jobs/regular/auto_join_channel_batch.rb

@@ -1,81 +0,0 @@
-# NOTE: When changing auto-join logic, make sure to update the `settings.auto_join_users_info` translation as well.
-# frozen_string_literal: true
-
-module Jobs
-  class AutoJoinChannelBatch < ::Jobs::Base
-    def execute(args)
-      return "starts_at or ends_at missing" if args[:starts_at].blank? || args[:ends_at].blank?
-      start_user_id = args[:starts_at].to_i
-      end_user_id = args[:ends_at].to_i
-
-      return "End is higher than start" if end_user_id < start_user_id
-
-      channel =
-        ChatChannel.find_by(
-          id: args[:chat_channel_id],
-          auto_join_users: true,
-          chatable_type: "Category",
-        )
-
-      return if !channel
-
-      category = channel.chatable
-      return if !category
-
-      query_args = {
-        chat_channel_id: channel.id,
-        start: start_user_id,
-        end: end_user_id,
-        suspended_until: Time.zone.now,
-        last_seen_at: 3.months.ago,
-        channel_category: channel.chatable_id,
-        mode: UserChatChannelMembership.join_modes[:automatic],
-      }
-
-      new_member_ids = DB.query_single(create_memberships_query(category), query_args)
-
-      # Only do this if we are running auto-join for a single user, if we
-      # are doing it for many then we should do it after all batches are
-      # complete for the channel in Jobs::AutoManageChannelMemberships
-      if start_user_id == end_user_id
-        Chat::ChatChannelMembershipManager.new(channel).recalculate_user_count
-      end
-
-      ChatPublisher.publish_new_channel(channel.reload, User.where(id: new_member_ids))
-    end
-
-    private
-
-    def create_memberships_query(category)
-      query = <<~SQL
-        INSERT INTO user_chat_channel_memberships (user_id, chat_channel_id, following, created_at, updated_at, join_mode)
-        SELECT DISTINCT(users.id), :chat_channel_id, TRUE, NOW(), NOW(), :mode
-        FROM users
-        INNER JOIN user_options uo ON uo.user_id = users.id
-        LEFT OUTER JOIN user_chat_channel_memberships uccm ON
-          uccm.chat_channel_id = :chat_channel_id AND uccm.user_id = users.id
-      SQL
-
-      query += <<~SQL if category.read_restricted?
-          INNER JOIN group_users gu ON gu.user_id = users.id
-          LEFT OUTER JOIN category_groups cg ON cg.group_id = gu.group_id
-        SQL
-
-      query += <<~SQL
-        WHERE (users.id >= :start AND users.id <= :end) AND
-          users.staged IS FALSE AND users.active AND
-          NOT EXISTS(SELECT 1 FROM anonymous_users a WHERE a.user_id = users.id) AND
-          (suspended_till IS NULL OR suspended_till <= :suspended_until) AND
-          (last_seen_at > :last_seen_at) AND
-          uo.chat_enabled AND
-          uccm.id IS NULL
-      SQL
-
-      query += <<~SQL if category.read_restricted?
-          AND cg.category_id = :channel_category
-        SQL
-
-      query += "RETURNING user_chat_channel_memberships.user_id"
-    end
-  end
-end

plugins/chat/app/jobs/regular/auto_manage_channel_memberships.rb

@@ -1,79 +0,0 @@
-# NOTE: When changing auto-join logic, make sure to update the `settings.auto_join_users_info` translation as well.
-# frozen_string_literal: true
-
-module Jobs
-  class AutoManageChannelMemberships < ::Jobs::Base
-    def execute(args)
-      channel =
-        ChatChannel.includes(:chatable).find_by(
-          id: args[:chat_channel_id],
-          auto_join_users: true,
-          chatable_type: "Category",
-        )
-
-      return if !channel&.chatable
-
-      processed =
-        UserChatChannelMembership.where(
-          chat_channel: channel,
-          following: true,
-          join_mode: UserChatChannelMembership.join_modes[:automatic],
-        ).count
-
-      auto_join_query(channel).find_in_batches do |batch|
-        break if processed >= SiteSetting.max_chat_auto_joined_users
-
-        starts_at = batch.first.query_user_id
-        ends_at = batch.last.query_user_id
-
-        Jobs.enqueue(
-          :auto_join_channel_batch,
-          chat_channel_id: channel.id,
-          starts_at: starts_at,
-          ends_at: ends_at,
-        )
-
-        processed += batch.size
-      end
-
-      # The Jobs::AutoJoinChannelBatch job will only do this recalculation
-      # if it's operating on one user, so we need to make sure we do it for
-      # the channel here once this job is complete.
-      Chat::ChatChannelMembershipManager.new(channel).recalculate_user_count
-    end
-
-    private
-
-    def auto_join_query(channel)
-      category = channel.chatable
-
-      users =
-        User
-          .real
-          .activated
-          .not_suspended
-          .not_staged
-          .distinct
-          .select(:id, "users.id AS query_user_id")
-          .where("last_seen_at > ?", 3.months.ago)
-          .joins(:user_option)
-          .where(user_options: { chat_enabled: true })
-          .joins(<<~SQL)
-            LEFT OUTER JOIN user_chat_channel_memberships uccm
-            ON uccm.chat_channel_id = #{channel.id} AND
-            uccm.user_id = users.id
-          SQL
-          .where("uccm.id IS NULL")
-
-      if category.read_restricted?
-        users =
-          users
-            .joins(:group_users)
-            .joins("INNER JOIN category_groups cg ON cg.group_id = group_users.group_id")
-            .where("cg.category_id = ?", channel.chatable_id)
-      end
-
-      users
-    end
-  end
-end

plugins/chat/app/jobs/regular/chat/auto_join_channel_batch.rb

@@ -0,0 +1,83 @@
+# NOTE: When changing auto-join logic, make sure to update the `settings.auto_join_users_info` translation as well.
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class AutoJoinChannelBatch < ::Jobs::Base
+      def execute(args)
+        return "starts_at or ends_at missing" if args[:starts_at].blank? || args[:ends_at].blank?
+        start_user_id = args[:starts_at].to_i
+        end_user_id = args[:ends_at].to_i
+
+        return "End is higher than start" if end_user_id < start_user_id
+
+        channel =
+          ::Chat::Channel.find_by(
+            id: args[:chat_channel_id],
+            auto_join_users: true,
+            chatable_type: "Category",
+          )
+
+        return if !channel
+
+        category = channel.chatable
+        return if !category
+
+        query_args = {
+          chat_channel_id: channel.id,
+          start: start_user_id,
+          end: end_user_id,
+          suspended_until: Time.zone.now,
+          last_seen_at: 3.months.ago,
+          channel_category: channel.chatable_id,
+          mode: ::Chat::UserChatChannelMembership.join_modes[:automatic],
+        }
+
+        new_member_ids = DB.query_single(create_memberships_query(category), query_args)
+
+        # Only do this if we are running auto-join for a single user, if we
+        # are doing it for many then we should do it after all batches are
+        # complete for the channel in Jobs::Chat::AutoManageChannelMemberships
+        if start_user_id == end_user_id
+          ::Chat::ChannelMembershipManager.new(channel).recalculate_user_count
+        end
+
+        ::Chat::Publisher.publish_new_channel(channel.reload, User.where(id: new_member_ids))
+      end
+
+      private
+
+      def create_memberships_query(category)
+        query = <<~SQL
+        INSERT INTO user_chat_channel_memberships (user_id, chat_channel_id, following, created_at, updated_at, join_mode)
+        SELECT DISTINCT(users.id), :chat_channel_id, TRUE, NOW(), NOW(), :mode
+        FROM users
+        INNER JOIN user_options uo ON uo.user_id = users.id
+        LEFT OUTER JOIN user_chat_channel_memberships uccm ON
+          uccm.chat_channel_id = :chat_channel_id AND uccm.user_id = users.id
+      SQL
+
+        query += <<~SQL if category.read_restricted?
+          INNER JOIN group_users gu ON gu.user_id = users.id
+          LEFT OUTER JOIN category_groups cg ON cg.group_id = gu.group_id
+        SQL
+
+        query += <<~SQL
+        WHERE (users.id >= :start AND users.id <= :end) AND
+          users.staged IS FALSE AND users.active AND
+          NOT EXISTS(SELECT 1 FROM anonymous_users a WHERE a.user_id = users.id) AND
+          (suspended_till IS NULL OR suspended_till <= :suspended_until) AND
+          (last_seen_at > :last_seen_at) AND
+          uo.chat_enabled AND
+          uccm.id IS NULL
+      SQL
+
+        query += <<~SQL if category.read_restricted?
+          AND cg.category_id = :channel_category
+        SQL
+
+        query += "RETURNING user_chat_channel_memberships.user_id"
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/auto_manage_channel_memberships.rb

@@ -0,0 +1,81 @@
+# NOTE: When changing auto-join logic, make sure to update the `settings.auto_join_users_info` translation as well.
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class AutoManageChannelMemberships < ::Jobs::Base
+      def execute(args)
+        channel =
+          ::Chat::Channel.includes(:chatable).find_by(
+            id: args[:chat_channel_id],
+            auto_join_users: true,
+            chatable_type: "Category",
+          )
+
+        return if !channel&.chatable
+
+        processed =
+          ::Chat::UserChatChannelMembership.where(
+            chat_channel: channel,
+            following: true,
+            join_mode: ::Chat::UserChatChannelMembership.join_modes[:automatic],
+          ).count
+
+        auto_join_query(channel).find_in_batches do |batch|
+          break if processed >= ::SiteSetting.max_chat_auto_joined_users
+
+          starts_at = batch.first.query_user_id
+          ends_at = batch.last.query_user_id
+
+          ::Jobs.enqueue(
+            ::Jobs::Chat::AutoJoinChannelBatch,
+            chat_channel_id: channel.id,
+            starts_at: starts_at,
+            ends_at: ends_at,
+          )
+
+          processed += batch.size
+        end
+
+        # The Jobs::Chat::AutoJoinChannelBatch job will only do this recalculation
+        # if it's operating on one user, so we need to make sure we do it for
+        # the channel here once this job is complete.
+        ::Chat::ChannelMembershipManager.new(channel).recalculate_user_count
+      end
+
+      private
+
+      def auto_join_query(channel)
+        category = channel.chatable
+
+        users =
+          ::User
+            .real
+            .activated
+            .not_suspended
+            .not_staged
+            .distinct
+            .select(:id, "users.id AS query_user_id")
+            .where("last_seen_at > ?", 3.months.ago)
+            .joins(:user_option)
+            .where(user_options: { chat_enabled: true })
+            .joins(<<~SQL)
+            LEFT OUTER JOIN user_chat_channel_memberships uccm
+            ON uccm.chat_channel_id = #{channel.id} AND
+            uccm.user_id = users.id
+          SQL
+            .where("uccm.id IS NULL")
+
+        if category.read_restricted?
+          users =
+            users
+              .joins(:group_users)
+              .joins("INNER JOIN category_groups cg ON cg.group_id = group_users.group_id")
+              .where("cg.category_id = ?", channel.chatable_id)
+        end
+
+        users
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/channel_archive.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class ChannelArchive < ::Jobs::Base
+      sidekiq_options retry: false
+
+      def execute(args = {})
+        channel_archive = ::Chat::ChannelArchive.find_by(id: args[:chat_channel_archive_id])
+
+        # this should not really happen, but better to do this than throw an error
+        if channel_archive.blank?
+          ::Rails.logger.warn(
+            "Chat channel archive #{args[:chat_channel_archive_id]} could not be found, aborting archive job.",
+          )
+          return
+        end
+
+        if channel_archive.complete?
+          channel_archive.chat_channel.update!(status: :archived)
+
+          ::Chat::Publisher.publish_archive_status(
+            channel_archive.chat_channel,
+            archive_status: :success,
+            archived_messages: channel_archive.archived_messages,
+            archive_topic_id: channel_archive.destination_topic_id,
+            total_messages: channel_archive.total_messages,
+          )
+
+          return
+        end
+
+        ::DistributedMutex.synchronize(
+          "archive_chat_channel_#{channel_archive.chat_channel_id}",
+          validity: 20.minutes,
+        ) { ::Chat::ChannelArchiveService.new(channel_archive).execute }
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/channel_delete.rb

@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class ChannelDelete < ::Jobs::Base
+      def execute(args = {})
+        chat_channel = ::Chat::Channel.with_deleted.find_by(id: args[:chat_channel_id])
+
+        # this should not really happen, but better to do this than throw an error
+        if chat_channel.blank?
+          ::Rails.logger.warn(
+            "Chat channel #{args[:chat_channel_id]} could not be found, aborting delete job.",
+          )
+          return
+        end
+
+        ::DistributedMutex.synchronize("delete_chat_channel_#{chat_channel.id}") do
+          ::Rails.logger.debug("Deleting webhooks and events for channel #{chat_channel.id}")
+          ::Chat::Message.transaction do
+            webhooks = ::Chat::IncomingWebhook.where(chat_channel: chat_channel)
+            ::Chat::WebhookEvent.where(incoming_chat_webhook_id: webhooks.select(:id)).delete_all
+            webhooks.delete_all
+          end
+
+          ::Rails.logger.debug("Deleting drafts and memberships for channel #{chat_channel.id}")
+          ::Chat::Draft.where(chat_channel: chat_channel).delete_all
+          ::Chat::UserChatChannelMembership.where(chat_channel: chat_channel).delete_all
+
+          ::Rails.logger.debug(
+            "Deleting chat messages, mentions, revisions, and uploads for channel #{chat_channel.id}",
+          )
+          chat_messages = ::Chat::Message.where(chat_channel: chat_channel)
+          delete_messages_and_related_records(chat_channel, chat_messages) if chat_messages.any?
+        end
+      end
+
+      def delete_messages_and_related_records(chat_channel, chat_messages)
+        message_ids = chat_messages.pluck(:id)
+
+        ::Chat::Message.transaction do
+          ::Chat::Mention.where(chat_message_id: message_ids).delete_all
+          ::Chat::MessageRevision.where(chat_message_id: message_ids).delete_all
+          ::Chat::MessageReaction.where(chat_message_id: message_ids).delete_all
+
+          # if the uploads are not used anywhere else they will be deleted
+          # by the CleanUpUploads job in core
+          ::DB.exec("DELETE FROM chat_uploads WHERE chat_message_id IN (#{message_ids.join(",")})")
+          ::UploadReference.where(
+            target_id: message_ids,
+            target_type: ::Chat::Message.sti_name,
+          ).delete_all
+
+          # only the messages and the channel are Trashable, everything else gets
+          # permanently destroyed
+          chat_messages.update_all(
+            deleted_by_id: chat_channel.deleted_by_id,
+            deleted_at: Time.zone.now,
+          )
+        end
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/delete_user_messages.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class DeleteUserMessages < ::Jobs::Base
+      def execute(args)
+        return if args[:user_id].nil?
+
+        ::Chat::MessageDestroyer.new.destroy_in_batches(
+          ::Chat::Message.with_deleted.where(user_id: args[:user_id]),
+        )
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/notify_mentioned.rb

@@ -0,0 +1,148 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class NotifyMentioned < ::Jobs::Base
+      def execute(args = {})
+        @chat_message =
+          ::Chat::Message.includes(:user, :revisions, chat_channel: :chatable).find_by(
+            id: args[:chat_message_id],
+          )
+        if @chat_message.nil? ||
+             @chat_message.revisions.where("created_at > ?", args[:timestamp]).any?
+          return
+        end
+
+        @creator = @chat_message.user
+        @chat_channel = @chat_message.chat_channel
+        @already_notified_user_ids = args[:already_notified_user_ids] || []
+        user_ids_to_notify = args[:to_notify_ids_map] || {}
+        user_ids_to_notify.each { |mention_type, ids| process_mentions(ids, mention_type.to_sym) }
+      end
+
+      private
+
+      def get_memberships(user_ids)
+        query =
+          ::Chat::UserChatChannelMembership.includes(:user).where(
+            user_id: (user_ids - @already_notified_user_ids),
+            chat_channel_id: @chat_message.chat_channel_id,
+          )
+        query = query.where(following: true) if @chat_channel.public_channel?
+        query
+      end
+
+      def build_data_for(membership, identifier_type:)
+        data = {
+          chat_message_id: @chat_message.id,
+          chat_channel_id: @chat_channel.id,
+          mentioned_by_username: @creator.username,
+          is_direct_message_channel: @chat_channel.direct_message_channel?,
+        }
+
+        if !@is_direct_message_channel
+          data[:chat_channel_title] = @chat_channel.title(membership.user)
+          data[:chat_channel_slug] = @chat_channel.slug
+        end
+
+        return data if identifier_type == :direct_mentions
+
+        case identifier_type
+        when :here_mentions
+          data[:identifier] = "here"
+        when :global_mentions
+          data[:identifier] = "all"
+        else
+          data[:identifier] = identifier_type if identifier_type
+          data[:is_group_mention] = true
+        end
+
+        data
+      end
+
+      def build_payload_for(membership, identifier_type:)
+        payload = {
+          notification_type: ::Notification.types[:chat_mention],
+          username: @creator.username,
+          tag: ::Chat::Notifier.push_notification_tag(:mention, @chat_channel.id),
+          excerpt: @chat_message.push_notification_excerpt,
+          post_url: "#{@chat_channel.relative_url}/#{@chat_message.id}",
+        }
+
+        translation_prefix =
+          (
+            if @chat_channel.direct_message_channel?
+              "discourse_push_notifications.popup.direct_message_chat_mention"
+            else
+              "discourse_push_notifications.popup.chat_mention"
+            end
+          )
+
+        translation_suffix = identifier_type == :direct_mentions ? "direct" : "other_type"
+        identifier_text =
+          case identifier_type
+          when :here_mentions
+            "@here"
+          when :global_mentions
+            "@all"
+          when :direct_mentions
+            ""
+          else
+            "@#{identifier_type}"
+          end
+
+        payload[:translated_title] = ::I18n.t(
+          "#{translation_prefix}.#{translation_suffix}",
+          username: @creator.username,
+          identifier: identifier_text,
+          channel: @chat_channel.title(membership.user),
+        )
+
+        payload
+      end
+
+      def create_notification!(membership, mention, mention_type)
+        notification_data = build_data_for(membership, identifier_type: mention_type)
+        is_read = ::Chat::Notifier.user_has_seen_message?(membership, @chat_message.id)
+        notification =
+          ::Notification.create!(
+            notification_type: ::Notification.types[:chat_mention],
+            user_id: membership.user_id,
+            high_priority: true,
+            data: notification_data.to_json,
+            read: is_read,
+          )
+
+        mention.update!(notification: notification)
+      end
+
+      def send_notifications(membership, mention_type)
+        payload = build_payload_for(membership, identifier_type: mention_type)
+
+        if !membership.desktop_notifications_never? && !membership.muted?
+          ::MessageBus.publish(
+            "/chat/notification-alert/#{membership.user_id}",
+            payload,
+            user_ids: [membership.user_id],
+          )
+        end
+
+        if !membership.mobile_notifications_never? && !membership.muted?
+          ::PostAlerter.push_notification(membership.user, payload)
+        end
+      end
+
+      def process_mentions(user_ids, mention_type)
+        memberships = get_memberships(user_ids)
+
+        memberships.each do |membership|
+          mention = ::Chat::Mention.find_by(user: membership.user, chat_message: @chat_message)
+          if mention.present?
+            create_notification!(membership, mention, mention_type)
+            send_notifications(membership, mention_type)
+          end
+        end
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/notify_watching.rb

@@ -0,0 +1,88 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class NotifyWatching < ::Jobs::Base
+      def execute(args = {})
+        @chat_message =
+          ::Chat::Message.includes(:user, chat_channel: :chatable).find_by(
+            id: args[:chat_message_id],
+          )
+        return if @chat_message.nil?
+
+        @creator = @chat_message.user
+        @chat_channel = @chat_message.chat_channel
+        @is_direct_message_channel = @chat_channel.direct_message_channel?
+
+        always_notification_level = ::Chat::UserChatChannelMembership::NOTIFICATION_LEVELS[:always]
+
+        members =
+          ::Chat::UserChatChannelMembership
+            .includes(user: :groups)
+            .joins(user: :user_option)
+            .where(user_option: { chat_enabled: true })
+            .where.not(user_id: args[:except_user_ids])
+            .where(chat_channel_id: @chat_channel.id)
+            .where(following: true)
+            .where(
+              "desktop_notification_level = ? OR mobile_notification_level = ?",
+              always_notification_level,
+              always_notification_level,
+            )
+            .merge(User.not_suspended)
+
+        if @is_direct_message_channel
+          ::UserCommScreener
+            .new(acting_user: @creator, target_user_ids: members.map(&:user_id))
+            .allowing_actor_communication
+            .each do |user_id|
+              send_notifications(members.find { |member| member.user_id == user_id })
+            end
+        else
+          members.each { |member| send_notifications(member) }
+        end
+      end
+
+      def send_notifications(membership)
+        user = membership.user
+        guardian = ::Guardian.new(user)
+        return unless guardian.can_chat? && guardian.can_join_chat_channel?(@chat_channel)
+        return if ::Chat::Notifier.user_has_seen_message?(membership, @chat_message.id)
+        return if online_user_ids.include?(user.id)
+
+        translation_key =
+          (
+            if @is_direct_message_channel
+              "discourse_push_notifications.popup.new_direct_chat_message"
+            else
+              "discourse_push_notifications.popup.new_chat_message"
+            end
+          )
+
+        translation_args = { username: @creator.username }
+        translation_args[:channel] = @chat_channel.title(user) unless @is_direct_message_channel
+
+        payload = {
+          username: @creator.username,
+          notification_type: ::Notification.types[:chat_message],
+          post_url: @chat_channel.relative_url,
+          translated_title: ::I18n.t(translation_key, translation_args),
+          tag: ::Chat::Notifier.push_notification_tag(:message, @chat_channel.id),
+          excerpt: @chat_message.push_notification_excerpt,
+        }
+
+        if membership.desktop_notifications_always? && !membership.muted?
+          ::MessageBus.publish("/chat/notification-alert/#{user.id}", payload, user_ids: [user.id])
+        end
+
+        if membership.mobile_notifications_always? && !membership.muted?
+          ::PostAlerter.push_notification(user, payload)
+        end
+      end
+
+      def online_user_ids
+        @online_user_ids ||= ::PresenceChannel.new("/chat/online").user_ids
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/process_message.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class ProcessMessage < ::Jobs::Base
+      def execute(args = {})
+        ::DistributedMutex.synchronize(
+          "jobs_chat_process_message_#{args[:chat_message_id]}",
+          validity: 10.minutes,
+        ) do
+          chat_message = ::Chat::Message.find_by(id: args[:chat_message_id])
+          return if !chat_message
+          processor = ::Chat::MessageProcessor.new(chat_message)
+          processor.run!
+
+          if args[:is_dirty] || processor.dirty?
+            chat_message.update(
+              cooked: processor.html,
+              cooked_version: ::Chat::Message::BAKED_VERSION,
+            )
+            ::Chat::Publisher.publish_processed!(chat_message)
+          end
+        end
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/send_message_notifications.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class SendMessageNotifications < ::Jobs::Base
+      def execute(args)
+        reason = args[:reason]
+        valid_reasons = %w[new edit]
+        return unless valid_reasons.include?(reason)
+
+        return if (timestamp = args[:timestamp]).blank?
+
+        return if (message = ::Chat::Message.find_by(id: args[:chat_message_id])).nil?
+
+        if reason == "new"
+          ::Chat::Notifier.new(message, timestamp).notify_new
+        elsif reason == "edit"
+          ::Chat::Notifier.new(message, timestamp).notify_edit
+        end
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat/update_channel_user_count.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class UpdateChannelUserCount < Jobs::Base
+      def execute(args = {})
+        channel = ::Chat::Channel.find_by(id: args[:chat_channel_id])
+        return if channel.blank?
+        return if !channel.user_count_stale
+
+        channel.update!(
+          user_count: ::Chat::ChannelMembershipsQuery.count(channel),
+          user_count_stale: false,
+        )
+
+        ::Chat::Publisher.publish_chat_channel_metadata(channel)
+      end
+    end
+  end
+end

plugins/chat/app/jobs/regular/chat_channel_archive.rb

@@ -1,38 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ChatChannelArchive < ::Jobs::Base
-    sidekiq_options retry: false
-
-    def execute(args = {})
-      channel_archive = ::ChatChannelArchive.find_by(id: args[:chat_channel_archive_id])
-
-      # this should not really happen, but better to do this than throw an error
-      if channel_archive.blank?
-        Rails.logger.warn(
-          "Chat channel archive #{args[:chat_channel_archive_id]} could not be found, aborting archive job.",
-        )
-        return
-      end
-
-      if channel_archive.complete?
-        channel_archive.chat_channel.update!(status: :archived)
-
-        ChatPublisher.publish_archive_status(
-          channel_archive.chat_channel,
-          archive_status: :success,
-          archived_messages: channel_archive.archived_messages,
-          archive_topic_id: channel_archive.destination_topic_id,
-          total_messages: channel_archive.total_messages,
-        )
-
-        return
-      end
-
-      DistributedMutex.synchronize(
-        "archive_chat_channel_#{channel_archive.chat_channel_id}",
-        validity: 20.minutes,
-      ) { Chat::ChatChannelArchiveService.new(channel_archive).execute }
-    end
-  end
-end

plugins/chat/app/jobs/regular/chat_channel_delete.rb

@@ -1,58 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ChatChannelDelete < ::Jobs::Base
-    def execute(args = {})
-      chat_channel = ::ChatChannel.with_deleted.find_by(id: args[:chat_channel_id])
-
-      # this should not really happen, but better to do this than throw an error
-      if chat_channel.blank?
-        Rails.logger.warn(
-          "Chat channel #{args[:chat_channel_id]} could not be found, aborting delete job.",
-        )
-        return
-      end
-
-      DistributedMutex.synchronize("delete_chat_channel_#{chat_channel.id}") do
-        Rails.logger.debug("Deleting webhooks and events for channel #{chat_channel.id}")
-        ChatMessage.transaction do
-          webhooks = IncomingChatWebhook.where(chat_channel: chat_channel)
-          ChatWebhookEvent.where(incoming_chat_webhook_id: webhooks.select(:id)).delete_all
-          webhooks.delete_all
-        end
-
-        Rails.logger.debug("Deleting drafts and memberships for channel #{chat_channel.id}")
-        ChatDraft.where(chat_channel: chat_channel).delete_all
-        UserChatChannelMembership.where(chat_channel: chat_channel).delete_all
-
-        Rails.logger.debug(
-          "Deleting chat messages, mentions, revisions, and uploads for channel #{chat_channel.id}",
-        )
-        chat_messages = ChatMessage.where(chat_channel: chat_channel)
-        delete_messages_and_related_records(chat_channel, chat_messages) if chat_messages.any?
-      end
-    end
-
-    def delete_messages_and_related_records(chat_channel, chat_messages)
-      message_ids = chat_messages.pluck(:id)
-
-      ChatMessage.transaction do
-        ChatMention.where(chat_message_id: message_ids).delete_all
-        ChatMessageRevision.where(chat_message_id: message_ids).delete_all
-        ChatMessageReaction.where(chat_message_id: message_ids).delete_all
-
-        # if the uploads are not used anywhere else they will be deleted
-        # by the CleanUpUploads job in core
-        DB.exec("DELETE FROM chat_uploads WHERE chat_message_id IN (#{message_ids.join(",")})")
-        UploadReference.where(target_id: message_ids, target_type: "ChatMessage").delete_all
-
-        # only the messages and the channel are Trashable, everything else gets
-        # permanently destroyed
-        chat_messages.update_all(
-          deleted_by_id: chat_channel.deleted_by_id,
-          deleted_at: Time.zone.now,
-        )
-      end
-    end
-  end
-end

plugins/chat/app/jobs/regular/chat_notify_mentioned.rb

@@ -1,146 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ChatNotifyMentioned < ::Jobs::Base
-    def execute(args = {})
-      @chat_message =
-        ChatMessage.includes(:user, :revisions, chat_channel: :chatable).find_by(
-          id: args[:chat_message_id],
-        )
-      if @chat_message.nil? ||
-           @chat_message.revisions.where("created_at > ?", args[:timestamp]).any?
-        return
-      end
-
-      @creator = @chat_message.user
-      @chat_channel = @chat_message.chat_channel
-      @already_notified_user_ids = args[:already_notified_user_ids] || []
-      user_ids_to_notify = args[:to_notify_ids_map] || {}
-      user_ids_to_notify.each { |mention_type, ids| process_mentions(ids, mention_type.to_sym) }
-    end
-
-    private
-
-    def get_memberships(user_ids)
-      query =
-        UserChatChannelMembership.includes(:user).where(
-          user_id: (user_ids - @already_notified_user_ids),
-          chat_channel_id: @chat_message.chat_channel_id,
-        )
-      query = query.where(following: true) if @chat_channel.public_channel?
-      query
-    end
-
-    def build_data_for(membership, identifier_type:)
-      data = {
-        chat_message_id: @chat_message.id,
-        chat_channel_id: @chat_channel.id,
-        mentioned_by_username: @creator.username,
-        is_direct_message_channel: @chat_channel.direct_message_channel?,
-      }
-
-      if !@is_direct_message_channel
-        data[:chat_channel_title] = @chat_channel.title(membership.user)
-        data[:chat_channel_slug] = @chat_channel.slug
-      end
-
-      return data if identifier_type == :direct_mentions
-
-      case identifier_type
-      when :here_mentions
-        data[:identifier] = "here"
-      when :global_mentions
-        data[:identifier] = "all"
-      else
-        data[:identifier] = identifier_type if identifier_type
-        data[:is_group_mention] = true
-      end
-
-      data
-    end
-
-    def build_payload_for(membership, identifier_type:)
-      payload = {
-        notification_type: Notification.types[:chat_mention],
-        username: @creator.username,
-        tag: Chat::ChatNotifier.push_notification_tag(:mention, @chat_channel.id),
-        excerpt: @chat_message.push_notification_excerpt,
-        post_url: "#{@chat_channel.relative_url}/#{@chat_message.id}",
-      }
-
-      translation_prefix =
-        (
-          if @chat_channel.direct_message_channel?
-            "discourse_push_notifications.popup.direct_message_chat_mention"
-          else
-            "discourse_push_notifications.popup.chat_mention"
-          end
-        )
-
-      translation_suffix = identifier_type == :direct_mentions ? "direct" : "other_type"
-      identifier_text =
-        case identifier_type
-        when :here_mentions
-          "@here"
-        when :global_mentions
-          "@all"
-        when :direct_mentions
-          ""
-        else
-          "@#{identifier_type}"
-        end
-
-      payload[:translated_title] = I18n.t(
-        "#{translation_prefix}.#{translation_suffix}",
-        username: @creator.username,
-        identifier: identifier_text,
-        channel: @chat_channel.title(membership.user),
-      )
-
-      payload
-    end
-
-    def create_notification!(membership, mention, mention_type)
-      notification_data = build_data_for(membership, identifier_type: mention_type)
-      is_read = Chat::ChatNotifier.user_has_seen_message?(membership, @chat_message.id)
-      notification =
-        Notification.create!(
-          notification_type: Notification.types[:chat_mention],
-          user_id: membership.user_id,
-          high_priority: true,
-          data: notification_data.to_json,
-          read: is_read,
-        )
-
-      mention.update!(notification: notification)
-    end
-
-    def send_notifications(membership, mention_type)
-      payload = build_payload_for(membership, identifier_type: mention_type)
-
-      if !membership.desktop_notifications_never? && !membership.muted?
-        MessageBus.publish(
-          "/chat/notification-alert/#{membership.user_id}",
-          payload,
-          user_ids: [membership.user_id],
-        )
-      end
-
-      if !membership.mobile_notifications_never? && !membership.muted?
-        PostAlerter.push_notification(membership.user, payload)
-      end
-    end
-
-    def process_mentions(user_ids, mention_type)
-      memberships = get_memberships(user_ids)
-
-      memberships.each do |membership|
-        mention = ChatMention.find_by(user: membership.user, chat_message: @chat_message)
-        if mention.present?
-          create_notification!(membership, mention, mention_type)
-          send_notifications(membership, mention_type)
-        end
-      end
-    end
-  end
-end

plugins/chat/app/jobs/regular/chat_notify_watching.rb

@@ -1,84 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ChatNotifyWatching < ::Jobs::Base
-    def execute(args = {})
-      @chat_message =
-        ChatMessage.includes(:user, chat_channel: :chatable).find_by(id: args[:chat_message_id])
-      return if @chat_message.nil?
-
-      @creator = @chat_message.user
-      @chat_channel = @chat_message.chat_channel
-      @is_direct_message_channel = @chat_channel.direct_message_channel?
-
-      always_notification_level = UserChatChannelMembership::NOTIFICATION_LEVELS[:always]
-
-      members =
-        UserChatChannelMembership
-          .includes(user: :groups)
-          .joins(user: :user_option)
-          .where(user_option: { chat_enabled: true })
-          .where.not(user_id: args[:except_user_ids])
-          .where(chat_channel_id: @chat_channel.id)
-          .where(following: true)
-          .where(
-            "desktop_notification_level = ? OR mobile_notification_level = ?",
-            always_notification_level,
-            always_notification_level,
-          )
-          .merge(User.not_suspended)
-
-      if @is_direct_message_channel
-        UserCommScreener
-          .new(acting_user: @creator, target_user_ids: members.map(&:user_id))
-          .allowing_actor_communication
-          .each do |user_id|
-            send_notifications(members.find { |member| member.user_id == user_id })
-          end
-      else
-        members.each { |member| send_notifications(member) }
-      end
-    end
-
-    def send_notifications(membership)
-      user = membership.user
-      guardian = Guardian.new(user)
-      return unless guardian.can_chat? && guardian.can_join_chat_channel?(@chat_channel)
-      return if Chat::ChatNotifier.user_has_seen_message?(membership, @chat_message.id)
-      return if online_user_ids.include?(user.id)
-
-      translation_key =
-        (
-          if @is_direct_message_channel
-            "discourse_push_notifications.popup.new_direct_chat_message"
-          else
-            "discourse_push_notifications.popup.new_chat_message"
-          end
-        )
-
-      translation_args = { username: @creator.username }
-      translation_args[:channel] = @chat_channel.title(user) unless @is_direct_message_channel
-
-      payload = {
-        username: @creator.username,
-        notification_type: Notification.types[:chat_message],
-        post_url: @chat_channel.relative_url,
-        translated_title: I18n.t(translation_key, translation_args),
-        tag: Chat::ChatNotifier.push_notification_tag(:message, @chat_channel.id),
-        excerpt: @chat_message.push_notification_excerpt,
-      }
-
-      if membership.desktop_notifications_always? && !membership.muted?
-        MessageBus.publish("/chat/notification-alert/#{user.id}", payload, user_ids: [user.id])
-      end
-
-      if membership.mobile_notifications_always? && !membership.muted?
-        PostAlerter.push_notification(user, payload)
-      end
-    end
-
-    def online_user_ids
-      @online_user_ids ||= PresenceChannel.new("/chat/online").user_ids
-    end
-  end
-end

plugins/chat/app/jobs/regular/delete_user_messages.rb

@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class DeleteUserMessages < ::Jobs::Base
-    def execute(args)
-      return if args[:user_id].nil?
-
-      ChatMessageDestroyer.new.destroy_in_batches(
-        ChatMessage.with_deleted.where(user_id: args[:user_id]),
-      )
-    end
-  end
-end

plugins/chat/app/jobs/regular/process_chat_message.rb

@@ -1,22 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ProcessChatMessage < ::Jobs::Base
-    def execute(args = {})
-      DistributedMutex.synchronize(
-        "process_chat_message_#{args[:chat_message_id]}",
-        validity: 10.minutes,
-      ) do
-        chat_message = ChatMessage.find_by(id: args[:chat_message_id])
-        return if !chat_message
-        processor = Chat::ChatMessageProcessor.new(chat_message)
-        processor.run!
-
-        if args[:is_dirty] || processor.dirty?
-          chat_message.update(cooked: processor.html, cooked_version: ChatMessage::BAKED_VERSION)
-          ChatPublisher.publish_processed!(chat_message)
-        end
-      end
-    end
-  end
-end

plugins/chat/app/jobs/regular/send_message_notifications.rb

@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class SendMessageNotifications < ::Jobs::Base
-    def execute(args)
-      reason = args[:reason]
-      valid_reasons = %w[new edit]
-      return unless valid_reasons.include?(reason)
-
-      return if (timestamp = args[:timestamp]).blank?
-
-      return if (message = ChatMessage.find_by(id: args[:chat_message_id])).nil?
-
-      if reason == "new"
-        Chat::ChatNotifier.new(message, timestamp).notify_new
-      elsif reason == "edit"
-        Chat::ChatNotifier.new(message, timestamp).notify_edit
-      end
-    end
-  end
-end

plugins/chat/app/jobs/regular/update_channel_user_count.rb

@@ -1,18 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class UpdateChannelUserCount < Jobs::Base
-    def execute(args = {})
-      channel = ChatChannel.find_by(id: args[:chat_channel_id])
-      return if channel.blank?
-      return if !channel.user_count_stale
-
-      channel.update!(
-        user_count: ChatChannelMembershipsQuery.count(channel),
-        user_count_stale: false,
-      )
-
-      ChatPublisher.publish_chat_channel_metadata(channel)
-    end
-  end
-end

plugins/chat/app/jobs/scheduled/auto_join_users.rb

@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class AutoJoinUsers < ::Jobs::Scheduled
-    every 1.hour
-
-    def execute(_args)
-      ChatChannel
-        .where(auto_join_users: true)
-        .each do |channel|
-          Chat::ChatChannelMembershipManager.new(channel).enforce_automatic_channel_memberships
-        end
-    end
-  end
-end

plugins/chat/app/jobs/scheduled/chat/auto_join_users.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class AutoJoinUsers < ::Jobs::Scheduled
+      every 1.hour
+
+      def execute(_args)
+        ::Chat::Channel
+          .where(auto_join_users: true)
+          .each do |channel|
+            ::Chat::ChannelMembershipManager.new(channel).enforce_automatic_channel_memberships
+          end
+      end
+    end
+  end
+end

plugins/chat/app/jobs/scheduled/chat/delete_old_messages.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class DeleteOldMessages < ::Jobs::Scheduled
+      daily at: 0.hours
+
+      def execute(args = {})
+        delete_public_channel_messages
+        delete_dm_channel_messages
+      end
+
+      private
+
+      def delete_public_channel_messages
+        return unless valid_day_value?(:chat_channel_retention_days)
+
+        ::Chat::MessageDestroyer.new.destroy_in_batches(
+          ::Chat::Message.in_public_channel.with_deleted.created_before(
+            ::SiteSetting.chat_channel_retention_days.days.ago,
+          ),
+        )
+      end
+
+      def delete_dm_channel_messages
+        return unless valid_day_value?(:chat_dm_retention_days)
+
+        ::Chat::MessageDestroyer.new.destroy_in_batches(
+          ::Chat::Message.in_dm_channel.with_deleted.created_before(
+            ::SiteSetting.chat_dm_retention_days.days.ago,
+          ),
+        )
+      end
+
+      def valid_day_value?(setting_name)
+        (::SiteSetting.public_send(setting_name) || 0).positive?
+      end
+    end
+  end
+end

plugins/chat/app/jobs/scheduled/chat/email_notifications.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class EmailNotifications < ::Jobs::Scheduled
+      every 5.minutes
+
+      def execute(args = {})
+        return unless ::SiteSetting.chat_enabled
+
+        ::Chat::Mailer.send_unread_mentions_summary
+      end
+    end
+  end
+end

plugins/chat/app/jobs/scheduled/chat/periodical_updates.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module Jobs
+  module Chat
+    class PeriodicalUpdates < ::Jobs::Scheduled
+      every 15.minutes
+
+      def execute(args = nil)
+        # TODO: Add rebaking of old messages (baked_version <
+        # Chat::Message::BAKED_VERSION or baked_version IS NULL)
+        ::Chat::Channel.ensure_consistency!
+        nil
+      end
+    end
+  end
+end

plugins/chat/app/jobs/scheduled/chat/update_user_counts_for_channels.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Jobs
+  # TODO (martin) Move into Chat::Channel.ensure_consistency! so it
+  # is run with Jobs::Chat::PeriodicalUpdates
+  module Chat
+    class UpdateUserCountsForChannels < ::Jobs::Scheduled
+      every 1.hour
+
+      # FIXME: This could become huge as the amount of channels grows, we
+      # need a different approach here. Perhaps we should only bother for
+      # channels updated or with new messages in the past N days? Perhaps
+      # we could update all the counts in a single query as well?
+      def execute(args = {})
+        ::Chat::Channel
+          .where(status: %i[open closed])
+          .find_each { |chat_channel| set_user_count(chat_channel) }
+      end
+
+      def set_user_count(chat_channel)
+        current_count = chat_channel.user_count || 0
+        new_count = ::Chat::ChannelMembershipsQuery.count(chat_channel)
+        return if current_count == new_count
+
+        chat_channel.update(user_count: new_count, user_count_stale: false)
+        ::Chat::Publisher.publish_chat_channel_metadata(chat_channel)
+      end
+    end
+  end
+end

plugins/chat/app/jobs/scheduled/chat_periodical_updates.rb

@@ -1,14 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class ChatPeriodicalUpdates < ::Jobs::Scheduled
-    every 15.minutes
-
-    def execute(args = nil)
-      # TODO: Add rebaking of old messages (baked_version <
-      # ChatMessage::BAKED_VERSION or baked_version IS NULL)
-      ChatChannel.ensure_consistency!
-      nil
-    end
-  end
-end

plugins/chat/app/jobs/scheduled/delete_old_chat_messages.rb

@@ -1,38 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class DeleteOldChatMessages < ::Jobs::Scheduled
-    daily at: 0.hours
-
-    def execute(args = {})
-      delete_public_channel_messages
-      delete_dm_channel_messages
-    end
-
-    private
-
-    def delete_public_channel_messages
-      return unless valid_day_value?(:chat_channel_retention_days)
-
-      ChatMessageDestroyer.new.destroy_in_batches(
-        ChatMessage.in_public_channel.with_deleted.created_before(
-          SiteSetting.chat_channel_retention_days.days.ago,
-        ),
-      )
-    end
-
-    def delete_dm_channel_messages
-      return unless valid_day_value?(:chat_dm_retention_days)
-
-      ChatMessageDestroyer.new.destroy_in_batches(
-        ChatMessage.in_dm_channel.with_deleted.created_before(
-          SiteSetting.chat_dm_retention_days.days.ago,
-        ),
-      )
-    end
-
-    def valid_day_value?(setting_name)
-      (SiteSetting.public_send(setting_name) || 0).positive?
-    end
-  end
-end

plugins/chat/app/jobs/scheduled/email_chat_notifications.rb

@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  class EmailChatNotifications < ::Jobs::Scheduled
-    every 5.minutes
-
-    def execute(args = {})
-      return unless SiteSetting.chat_enabled
-
-      Chat::ChatMailer.send_unread_mentions_summary
-    end
-  end
-end

plugins/chat/app/jobs/scheduled/update_user_counts_for_chat_channels.rb

@@ -1,28 +0,0 @@
-# frozen_string_literal: true
-
-module Jobs
-  # TODO (martin) Move into ChatChannel.ensure_consistency! so it
-  # is run with ChatPeriodicalUpdates
-  class UpdateUserCountsForChatChannels < ::Jobs::Scheduled
-    every 1.hour
-
-    # FIXME: This could become huge as the amount of channels grows, we
-    # need a different approach here. Perhaps we should only bother for
-    # channels updated or with new messages in the past N days? Perhaps
-    # we could update all the counts in a single query as well?
-    def execute(args = {})
-      ChatChannel
-        .where(status: %i[open closed])
-        .find_each { |chat_channel| set_user_count(chat_channel) }
-    end
-
-    def set_user_count(chat_channel)
-      current_count = chat_channel.user_count || 0
-      new_count = ChatChannelMembershipsQuery.count(chat_channel)
-      return if current_count == new_count
-
-      chat_channel.update(user_count: new_count, user_count_stale: false)
-      ChatPublisher.publish_chat_channel_metadata(chat_channel)
-    end
-  end
-end

plugins/chat/app/models/category_channel.rb

@@ -1,45 +0,0 @@
-# frozen_string_literal: true
-
-class CategoryChannel < ChatChannel
-  alias_attribute :category, :chatable
-
-  delegate :read_restricted?, to: :category
-  delegate :url, to: :chatable, prefix: true
-
-  %i[category_channel? public_channel? chatable_has_custom_fields?].each do |name|
-    define_method(name) { true }
-  end
-
-  def allowed_group_ids
-    return if !read_restricted?
-
-    staff_groups = Group::AUTO_GROUPS.slice(:staff, :moderators, :admins).values
-    category.secure_group_ids.to_a.concat(staff_groups)
-  end
-
-  def title(_ = nil)
-    name.presence || category.name
-  end
-
-  def generate_auto_slug
-    return if self.slug.present?
-    self.slug = Slug.for(self.title.strip, "")
-    self.slug = "" if duplicate_slug?
-  end
-
-  def ensure_slug_ok
-    if self.slug.present?
-      # if we don't unescape it first we strip the % from the encoded version
-      slug = SiteSetting.slug_generation_method == "encoded" ? CGI.unescape(self.slug) : self.slug
-      self.slug = Slug.for(slug, "", method: :encoded)
-
-      if self.slug.blank?
-        errors.add(:slug, :invalid)
-      elsif SiteSetting.slug_generation_method == "ascii" && !CGI.unescape(self.slug).ascii_only?
-        errors.add(:slug, I18n.t("chat.category_channel.errors.slug_contains_non_ascii_chars"))
-      elsif duplicate_slug?
-        errors.add(:slug, I18n.t("chat.category_channel.errors.is_already_in_use"))
-      end
-    end
-  end
-end

plugins/chat/app/models/chat/category_channel.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+module Chat
+  class CategoryChannel < Channel
+    alias_attribute :category, :chatable
+
+    delegate :read_restricted?, to: :category
+    delegate :url, to: :chatable, prefix: true
+
+    def self.polymorphic_class_for(name)
+      Chat::Chatable.polymorphic_class_for(name) || super(name)
+    end
+
+    %i[category_channel? public_channel? chatable_has_custom_fields?].each do |name|
+      define_method(name) { true }
+    end
+
+    def allowed_group_ids
+      return if !read_restricted?
+
+      staff_groups = Group::AUTO_GROUPS.slice(:staff, :moderators, :admins).values
+      category.secure_group_ids.to_a.concat(staff_groups)
+    end
+
+    def title(_ = nil)
+      name.presence || category.name
+    end
+
+    def generate_auto_slug
+      return if self.slug.present?
+      self.slug = Slug.for(self.title.strip, "")
+      self.slug = "" if duplicate_slug?
+    end
+
+    def ensure_slug_ok
+      if self.slug.present?
+        # if we don't unescape it first we strip the % from the encoded version
+        slug = SiteSetting.slug_generation_method == "encoded" ? CGI.unescape(self.slug) : self.slug
+        self.slug = Slug.for(slug, "", method: :encoded)
+
+        if self.slug.blank?
+          errors.add(:slug, :invalid)
+        elsif SiteSetting.slug_generation_method == "ascii" && !CGI.unescape(self.slug).ascii_only?
+          errors.add(:slug, I18n.t("chat.category_channel.errors.slug_contains_non_ascii_chars"))
+        elsif duplicate_slug?
+          errors.add(:slug, I18n.t("chat.category_channel.errors.is_already_in_use"))
+        end
+      end
+    end
+  end
+end

plugins/chat/app/models/chat/channel.rb

@@ -0,0 +1,196 @@
+# frozen_string_literal: true
+
+module Chat
+  class Channel < ActiveRecord::Base
+    include Trashable
+
+    self.table_name = "chat_channels"
+
+    belongs_to :chatable, polymorphic: true
+
+    def self.sti_class_for(type_name)
+      Chat::Chatable.sti_class_for(type_name) || super(type_name)
+    end
+
+    def self.sti_name
+      Chat::Chatable.sti_name_for(self) || super
+    end
+
+    belongs_to :direct_message,
+               class_name: "Chat::DirectMessage",
+               foreign_key: :chatable_id,
+               inverse_of: :direct_message_channel,
+               optional: true
+
+    has_many :chat_messages, class_name: "Chat::Message", foreign_key: :chat_channel_id
+    has_many :user_chat_channel_memberships,
+             class_name: "Chat::UserChatChannelMembership",
+             foreign_key: :chat_channel_id
+    has_one :chat_channel_archive, class_name: "Chat::ChannelArchive", foreign_key: :chat_channel_id
+
+    enum :status, { open: 0, read_only: 1, closed: 2, archived: 3 }, scopes: false
+
+    validates :name,
+              length: {
+                maximum: Proc.new { SiteSetting.max_topic_title_length },
+              },
+              presence: true,
+              allow_nil: true
+    validate :ensure_slug_ok, if: :slug_changed?
+    before_validation :generate_auto_slug
+
+    scope :public_channels,
+          -> {
+            where(chatable_type: public_channel_chatable_types).where(
+              "categories.id IS NOT NULL",
+            ).joins(
+              "LEFT JOIN categories ON categories.id = chat_channels.chatable_id AND chat_channels.chatable_type = 'Category'",
+            )
+          }
+
+    delegate :empty?, to: :chat_messages, prefix: true
+
+    class << self
+      def editable_statuses
+        statuses.filter { |k, _| !%w[read_only archived].include?(k) }
+      end
+
+      def public_channel_chatable_types
+        %w[Category]
+      end
+
+      def direct_channel_chatable_types
+        %w[DirectMessage]
+      end
+
+      def chatable_types
+        public_channel_chatable_types + direct_channel_chatable_types
+      end
+    end
+
+    statuses.keys.each do |status|
+      define_method("#{status}!") { |acting_user| change_status(acting_user, status.to_sym) }
+    end
+
+    %i[
+      category_channel?
+      direct_message_channel?
+      public_channel?
+      chatable_has_custom_fields?
+      read_restricted?
+    ].each { |name| define_method(name) { false } }
+
+    %i[allowed_user_ids allowed_group_ids chatable_url].each { |name| define_method(name) { nil } }
+
+    def membership_for(user)
+      user_chat_channel_memberships.find_by(user: user)
+    end
+
+    def add(user)
+      Chat::ChannelMembershipManager.new(self).follow(user)
+    end
+
+    def remove(user)
+      Chat::ChannelMembershipManager.new(self).unfollow(user)
+    end
+
+    def url
+      "#{Discourse.base_url}/chat/c/#{self.slug || "-"}/#{self.id}"
+    end
+
+    def relative_url
+      "#{Discourse.base_path}/chat/c/#{self.slug || "-"}/#{self.id}"
+    end
+
+    def self.ensure_consistency!
+      update_counts
+    end
+
+    # TODO (martin) Move Jobs::Chat::UpdateUserCountsForChannels into here
+    def self.update_counts
+      # NOTE: Chat::Channel#messages_count is not updated every time
+      # a message is created or deleted in a channel, so it should not
+      # be displayed in the UI. It is updated eventually via Jobs::Chat::PeriodicalUpdates
+      DB.exec <<~SQL
+      UPDATE chat_channels channels
+      SET messages_count = subquery.messages_count
+      FROM (
+        SELECT COUNT(*) AS messages_count, chat_channel_id
+        FROM chat_messages
+        WHERE chat_messages.deleted_at IS NULL
+        GROUP BY chat_channel_id
+      ) subquery
+      WHERE channels.id = subquery.chat_channel_id
+      AND channels.deleted_at IS NULL
+      AND subquery.messages_count != channels.messages_count
+    SQL
+    end
+
+    private
+
+    def change_status(acting_user, target_status)
+      return if !Guardian.new(acting_user).can_change_channel_status?(self, target_status)
+      self.update!(status: target_status)
+      log_channel_status_change(acting_user: acting_user)
+    end
+
+    def log_channel_status_change(acting_user:)
+      DiscourseEvent.trigger(
+        :chat_channel_status_change,
+        channel: self,
+        old_status: status_previously_was,
+        new_status: status,
+      )
+
+      StaffActionLogger.new(acting_user).log_custom(
+        "chat_channel_status_change",
+        {
+          chat_channel_id: self.id,
+          chat_channel_name: self.name,
+          previous_value: status_previously_was,
+          new_value: status,
+        },
+      )
+
+      Chat::Publisher.publish_channel_status(self)
+    end
+
+    def duplicate_slug?
+      Chat::Channel.where(slug: self.slug).where.not(id: self.id).any?
+    end
+  end
+end
+
+# == Schema Information
+#
+# Table name: chat_channels
+#
+#  id                           :bigint           not null, primary key
+#  chatable_id                  :integer          not null
+#  deleted_at                   :datetime
+#  deleted_by_id                :integer
+#  featured_in_category_id      :integer
+#  delete_after_seconds         :integer
+#  chatable_type                :string           not null
+#  created_at                   :datetime         not null
+#  updated_at                   :datetime         not null
+#  name                         :string
+#  description                  :text
+#  status                       :integer          default("open"), not null
+#  user_count                   :integer          default(0), not null
+#  last_message_sent_at         :datetime         not null
+#  auto_join_users              :boolean          default(FALSE), not null
+#  allow_channel_wide_mentions  :boolean          default(TRUE), not null
+#  user_count_stale             :boolean          default(FALSE), not null
+#  slug                         :string
+#  type                         :string
+#  threading_enabled            :boolean          default(FALSE), not null
+#
+# Indexes
+#
+#  index_chat_channels_on_messages_count             (messages_count)
+#  index_chat_channels_on_chatable_id                    (chatable_id)
+#  index_chat_channels_on_chatable_id_and_chatable_type  (chatable_id,chatable_type)
+#  index_chat_channels_on_slug                           (slug) UNIQUE
+#  index_chat_channels_on_status                         (status)
+#

plugins/chat/app/models/chat/channel_archive.rb

@@ -1,21 +1,24 @@
 # frozen_string_literal: true
 
-class ChatChannelArchive < ActiveRecord::Base
-  belongs_to :chat_channel
-  belongs_to :archived_by, class_name: "User"
+module Chat
+  class ChannelArchive < ActiveRecord::Base
+    belongs_to :chat_channel, class_name: "Chat::Channel"
+    belongs_to :archived_by, class_name: "User"
+    belongs_to :destination_topic, class_name: "Topic"
 
-  belongs_to :destination_topic, class_name: "Topic"
+    self.table_name = "chat_channel_archives"
 
-  def complete?
-    self.archived_messages >= self.total_messages && self.chat_channel.chat_messages.count.zero?
-  end
+    def complete?
+      self.archived_messages >= self.total_messages && self.chat_channel.chat_messages.count.zero?
+    end
 
-  def failed?
-    !complete? && self.archive_error.present?
-  end
+    def failed?
+      !complete? && self.archive_error.present?
+    end
 
-  def new_topic?
-    self.destination_topic_title.present?
+    def new_topic?
+      self.destination_topic_title.present?
+    end
   end
 end
 

plugins/chat/app/models/chat/deleted_user.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Chat
+  class DeletedUser < User
+    def username
+      I18n.t("chat.deleted_chat_username")
+    end
+
+    def avatar_template
+      "/plugins/chat/images/deleted-chat-user-avatar.png"
+    end
+
+    def bot?
+      false
+    end
+  end
+end

plugins/chat/app/models/chat/direct_message.rb

@@ -0,0 +1,72 @@
+# frozen_string_literal: true
+
+module Chat
+  class DirectMessage < ActiveRecord::Base
+    self.table_name = "direct_message_channels"
+
+    include Chatable
+
+    def self.polymorphic_name
+      Chat::Chatable.polymorphic_name_for(self) || super
+    end
+
+    has_many :direct_message_users,
+             class_name: "Chat::DirectMessageUser",
+             foreign_key: :direct_message_channel_id
+    has_many :users, through: :direct_message_users
+
+    has_one :direct_message_channel, as: :chatable, class_name: "Chat::DirectMessageChannel"
+
+    def self.for_user_ids(user_ids)
+      joins(:users)
+        .group("direct_message_channels.id")
+        .having("ARRAY[?] = ARRAY_AGG(users.id ORDER BY users.id)", user_ids.sort)
+        &.first
+    end
+
+    def user_can_access?(user)
+      users.include?(user)
+    end
+
+    def chat_channel_title_for_user(chat_channel, acting_user)
+      users =
+        (direct_message_users.map(&:user) - [acting_user]).map do |user|
+          user || Chat::DeletedUser.new
+        end
+
+      # direct message to self
+      if users.empty?
+        return I18n.t("chat.channel.dm_title.single_user", username: "@#{acting_user.username}")
+      end
+
+      # all users deleted
+      return chat_channel.id if !users.first
+
+      usernames_formatted = users.sort_by(&:username).map { |u| "@#{u.username}" }
+      if usernames_formatted.size > 5
+        return(
+          I18n.t(
+            "chat.channel.dm_title.multi_user_truncated",
+            comma_separated_usernames:
+              usernames_formatted[0..4].join(I18n.t("word_connector.comma")),
+            count: usernames_formatted.length - 5,
+          )
+        )
+      end
+
+      I18n.t(
+        "chat.channel.dm_title.multi_user",
+        comma_separated_usernames: usernames_formatted.join(I18n.t("word_connector.comma")),
+      )
+    end
+  end
+end
+
+# == Schema Information
+#
+# Table name: direct_message_channels
+#
+#  id         :bigint           not null, primary key
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#

plugins/chat/app/models/chat/direct_message_channel.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+module Chat
+  class DirectMessageChannel < Channel
+    alias_attribute :direct_message, :chatable
+
+    def self.polymorphic_class_for(name)
+      Chat::Chatable.polymorphic_class_for(name) || super(name)
+    end
+
+    def direct_message_channel?
+      true
+    end
+
+    def allowed_user_ids
+      direct_message.user_ids
+    end
+
+    def read_restricted?
+      true
+    end
+
+    def title(user)
+      direct_message.chat_channel_title_for_user(self, user)
+    end
+
+    def ensure_slug_ok
+      true
+    end
+
+    def generate_auto_slug
+      self.slug = nil
+    end
+  end
+end

plugins/chat/app/models/chat/direct_message_user.rb

@@ -1,8 +1,14 @@
 # frozen_string_literal: true
 
-class DirectMessageUser < ActiveRecord::Base
-  belongs_to :direct_message, foreign_key: :direct_message_channel_id
-  belongs_to :user
+module Chat
+  class DirectMessageUser < ActiveRecord::Base
+    self.table_name = "direct_message_users"
+
+    belongs_to :direct_message,
+               class_name: "Chat::DirectMessage",
+               foreign_key: :direct_message_channel_id
+    belongs_to :user
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/draft.rb

@@ -1,13 +1,17 @@
 # frozen_string_literal: true
 
-class ChatDraft < ActiveRecord::Base
-  belongs_to :user
-  belongs_to :chat_channel
+module Chat
+  class Draft < ActiveRecord::Base
+    belongs_to :user
+    belongs_to :chat_channel, class_name: "Chat::Channel"
 
-  validate :data_length
-  def data_length
-    if self.data && self.data.length > SiteSetting.max_chat_draft_length
-      self.errors.add(:base, I18n.t("chat.errors.draft_too_long"))
+    self.table_name = "chat_drafts"
+
+    validate :data_length
+    def data_length
+      if self.data && self.data.length > SiteSetting.max_chat_draft_length
+        self.errors.add(:base, I18n.t("chat.errors.draft_too_long"))
+      end
     end
   end
 end

plugins/chat/app/models/chat/incoming_webhook.rb

@@ -1,13 +1,17 @@
 # frozen_string_literal: true
 
-class IncomingChatWebhook < ActiveRecord::Base
-  belongs_to :chat_channel
-  has_many :chat_webhook_events
+module Chat
+  class IncomingWebhook < ActiveRecord::Base
+    self.table_name = "incoming_chat_webhooks"
 
-  before_create { self.key = SecureRandom.hex(12) }
+    belongs_to :chat_channel, class_name: "Chat::Channel"
+    has_many :chat_webhook_events, class_name: "Chat::WebhookEvent"
 
-  def url
-    "#{Discourse.base_url}/chat/hooks/#{key}.json"
+    before_create { self.key = SecureRandom.hex(12) }
+
+    def url
+      "#{Discourse.base_url}/chat/hooks/#{key}.json"
+    end
   end
 end
 

plugins/chat/app/models/chat/mention.rb

@@ -1,9 +1,13 @@
 # frozen_string_literal: true
 
-class ChatMention < ActiveRecord::Base
-  belongs_to :user
-  belongs_to :chat_message
-  belongs_to :notification, dependent: :destroy
+module Chat
+  class Mention < ActiveRecord::Base
+    self.table_name = "chat_mentions"
+
+    belongs_to :user
+    belongs_to :chat_message, class_name: "Chat::Message"
+    belongs_to :notification, dependent: :destroy
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/message.rb

@@ -0,0 +1,360 @@
+# frozen_string_literal: true
+
+module Chat
+  class Message < ActiveRecord::Base
+    include Trashable
+
+    self.table_name = "chat_messages"
+
+    attribute :has_oneboxes, default: false
+
+    BAKED_VERSION = 2
+
+    belongs_to :chat_channel, class_name: "Chat::Channel"
+    belongs_to :user
+    belongs_to :in_reply_to, class_name: "Chat::Message"
+    belongs_to :last_editor, class_name: "User"
+    belongs_to :thread, class_name: "Chat::Thread"
+
+    has_many :replies,
+             class_name: "Chat::Message",
+             foreign_key: "in_reply_to_id",
+             dependent: :nullify
+    has_many :revisions,
+             class_name: "Chat::MessageRevision",
+             dependent: :destroy,
+             foreign_key: :chat_message_id
+    has_many :reactions,
+             class_name: "Chat::MessageReaction",
+             dependent: :destroy,
+             foreign_key: :chat_message_id
+    has_many :bookmarks,
+             -> {
+               unscope(where: :bookmarkable_type).where(bookmarkable_type: Chat::Message.sti_name)
+             },
+             as: :bookmarkable,
+             dependent: :destroy
+    has_many :upload_references,
+             -> { unscope(where: :target_type).where(target_type: Chat::Message.sti_name) },
+             dependent: :destroy,
+             foreign_key: :target_id
+    has_many :uploads, through: :upload_references, class_name: "::Upload"
+
+    CLASS_MAPPING = { "ChatMessage" => Chat::Message }
+
+    # the model used when loading type column
+    def self.sti_class_for(name)
+      CLASS_MAPPING[name] if CLASS_MAPPING.key?(name)
+    end
+    # the type column value
+    def self.sti_name
+      CLASS_MAPPING.invert.fetch(self)
+    end
+
+    # the model used when loading chatable_type column
+    def self.polymorphic_class_for(name)
+      CLASS_MAPPING[name] if CLASS_MAPPING.key?(name)
+    end
+    # the type stored in *_type column of polymorphic associations
+    def self.polymorphic_name
+      CLASS_MAPPING.invert.fetch(self) || super
+    end
+
+    # TODO (martin) Remove this when we drop the ChatUpload table
+    has_many :chat_uploads,
+             dependent: :destroy,
+             class_name: "Chat::Upload",
+             foreign_key: :chat_message_id
+    has_one :chat_webhook_event,
+            dependent: :destroy,
+            class_name: "Chat::WebhookEvent",
+            foreign_key: :chat_message_id
+    has_many :chat_mentions,
+             dependent: :destroy,
+             class_name: "Chat::Mention",
+             foreign_key: :chat_message_id
+
+    scope :in_public_channel,
+          -> {
+            joins(:chat_channel).where(
+              chat_channel: {
+                chatable_type: Chat::Channel.public_channel_chatable_types,
+              },
+            )
+          }
+
+    scope :in_dm_channel,
+          -> {
+            joins(:chat_channel).where(
+              chat_channel: {
+                chatable_type: Chat::Channel.direct_channel_chatable_types,
+              },
+            )
+          }
+
+    scope :created_before, ->(date) { where("chat_messages.created_at < ?", date) }
+
+    before_save { ensure_last_editor_id }
+
+    def validate_message(has_uploads:)
+      WatchedWordsValidator.new(attributes: [:message]).validate(self)
+
+      if self.new_record? || self.changed.include?("message")
+        Chat::DuplicateMessageValidator.new(self).validate
+      end
+
+      if !has_uploads && message_too_short?
+        self.errors.add(
+          :base,
+          I18n.t(
+            "chat.errors.minimum_length_not_met",
+            count: SiteSetting.chat_minimum_message_length,
+          ),
+        )
+      end
+
+      if message_too_long?
+        self.errors.add(
+          :base,
+          I18n.t("chat.errors.message_too_long", count: SiteSetting.chat_maximum_message_length),
+        )
+      end
+    end
+
+    def attach_uploads(uploads)
+      return if uploads.blank? || self.new_record?
+
+      now = Time.now
+      ref_record_attrs =
+        uploads.map do |upload|
+          {
+            upload_id: upload.id,
+            target_id: self.id,
+            target_type: self.class.sti_name,
+            created_at: now,
+            updated_at: now,
+          }
+        end
+      UploadReference.insert_all!(ref_record_attrs)
+    end
+
+    def excerpt(max_length: 50)
+      # just show the URL if the whole message is a URL, because we cannot excerpt oneboxes
+      return message if UrlHelper.relaxed_parse(message).is_a?(URI)
+
+      # upload-only messages are better represented as the filename
+      return uploads.first.original_filename if cooked.blank? && uploads.present?
+
+      # this may return blank for some complex things like quotes, that is acceptable
+      PrettyText.excerpt(message, max_length, { text_entities: true })
+    end
+
+    def cooked_for_excerpt
+      (cooked.blank? && uploads.present?) ? "<p>#{uploads.first.original_filename}</p>" : cooked
+    end
+
+    def push_notification_excerpt
+      Emoji.gsub_emoji_to_unicode(message).truncate(400)
+    end
+
+    def to_markdown
+      upload_markdown =
+        self
+          .upload_references
+          .includes(:upload)
+          .order(:created_at)
+          .map(&:to_markdown)
+          .reject(&:empty?)
+
+      return self.message if upload_markdown.empty?
+
+      return ["#{self.message}\n"].concat(upload_markdown).join("\n") if self.message.present?
+
+      upload_markdown.join("\n")
+    end
+
+    def cook
+      ensure_last_editor_id
+
+      self.cooked = self.class.cook(self.message, user_id: self.last_editor_id)
+      self.cooked_version = BAKED_VERSION
+    end
+
+    def rebake!(invalidate_oneboxes: false, priority: nil)
+      ensure_last_editor_id
+
+      previous_cooked = self.cooked
+      new_cooked =
+        self.class.cook(
+          message,
+          invalidate_oneboxes: invalidate_oneboxes,
+          user_id: self.last_editor_id,
+        )
+      update_columns(cooked: new_cooked, cooked_version: BAKED_VERSION)
+      args = { chat_message_id: self.id }
+      args[:queue] = priority.to_s if priority && priority != :normal
+      args[:is_dirty] = true if previous_cooked != new_cooked
+
+      Jobs.enqueue(Jobs::Chat::ProcessMessage, args)
+    end
+
+    def self.uncooked
+      where("cooked_version <> ? or cooked_version IS NULL", BAKED_VERSION)
+    end
+
+    MARKDOWN_FEATURES = %w[
+      anchor
+      bbcode-block
+      bbcode-inline
+      code
+      category-hashtag
+      censored
+      chat-transcript
+      discourse-local-dates
+      emoji
+      emojiShortcuts
+      inlineEmoji
+      html-img
+      hashtag-autocomplete
+      mentions
+      unicodeUsernames
+      onebox
+      quotes
+      spoiler-alert
+      table
+      text-post-process
+      upload-protocol
+      watched-words
+    ]
+
+    MARKDOWN_IT_RULES = %w[
+      autolink
+      list
+      backticks
+      newline
+      code
+      fence
+      image
+      table
+      linkify
+      link
+      strikethrough
+      blockquote
+      emphasis
+    ]
+
+    def self.cook(message, opts = {})
+      # A rule in our Markdown pipeline may have Guardian checks that require a
+      # user to be present. The last editing user of the message will be more
+      # generally up to date than the creating user. For example, we use
+      # this when cooking #hashtags to determine whether we should render
+      # the found hashtag based on whether the user can access the channel it
+      # is referencing.
+      cooked =
+        PrettyText.cook(
+          message,
+          features_override:
+            MARKDOWN_FEATURES + DiscoursePluginRegistry.chat_markdown_features.to_a,
+          markdown_it_rules: MARKDOWN_IT_RULES,
+          force_quote_link: true,
+          user_id: opts[:user_id],
+          hashtag_context: "chat-composer",
+        )
+
+      result =
+        Oneboxer.apply(cooked) do |url|
+          if opts[:invalidate_oneboxes]
+            Oneboxer.invalidate(url)
+            InlineOneboxer.invalidate(url)
+          end
+          onebox = Oneboxer.cached_onebox(url)
+          onebox
+        end
+
+      cooked = result.to_html if result.changed?
+      cooked
+    end
+
+    def full_url
+      "#{Discourse.base_url}#{url}"
+    end
+
+    def url
+      "/chat/c/-/#{self.chat_channel_id}/#{self.id}"
+    end
+
+    def create_mentions(user_ids)
+      return if user_ids.empty?
+
+      now = Time.zone.now
+      mentions = []
+      User
+        .where(id: user_ids)
+        .find_each do |user|
+          mentions << {
+            chat_message_id: self.id,
+            user_id: user.id,
+            created_at: now,
+            updated_at: now,
+          }
+        end
+
+      Chat::Mention.insert_all(mentions)
+    end
+
+    def update_mentions(mentioned_user_ids)
+      old_mentions = chat_mentions.pluck(:user_id)
+      updated_mentions = mentioned_user_ids
+      mentioned_user_ids_to_drop = old_mentions - updated_mentions
+      mentioned_user_ids_to_add = updated_mentions - old_mentions
+
+      delete_mentions(mentioned_user_ids_to_drop)
+      create_mentions(mentioned_user_ids_to_add)
+    end
+
+    private
+
+    def delete_mentions(user_ids)
+      chat_mentions.where(user_id: user_ids).destroy_all
+    end
+
+    def message_too_short?
+      message.length < SiteSetting.chat_minimum_message_length
+    end
+
+    def message_too_long?
+      message.length > SiteSetting.chat_maximum_message_length
+    end
+
+    def ensure_last_editor_id
+      self.last_editor_id ||= self.user_id
+    end
+  end
+end
+
+# == Schema Information
+#
+# Table name: chat_messages
+#
+#  id              :bigint           not null, primary key
+#  chat_channel_id :integer          not null
+#  user_id         :integer
+#  created_at      :datetime         not null
+#  updated_at      :datetime         not null
+#  deleted_at      :datetime
+#  deleted_by_id   :integer
+#  in_reply_to_id  :integer
+#  message         :text
+#  cooked          :text
+#  cooked_version  :integer
+#  last_editor_id  :integer          not null
+#  thread_id       :integer
+#
+# Indexes
+#
+#  idx_chat_messages_by_created_at_not_deleted            (created_at) WHERE (deleted_at IS NULL)
+#  index_chat_messages_on_chat_channel_id_and_created_at  (chat_channel_id,created_at)
+#  index_chat_messages_on_chat_channel_id_and_id          (chat_channel_id,id) WHERE (deleted_at IS NULL)
+#  index_chat_messages_on_last_editor_id                  (last_editor_id)
+#  index_chat_messages_on_thread_id                       (thread_id)
+#

plugins/chat/app/models/chat/message_reaction.rb

@@ -1,8 +1,12 @@
 # frozen_string_literal: true
 
-class ChatMessageReaction < ActiveRecord::Base
-  belongs_to :chat_message
-  belongs_to :user
+module Chat
+  class MessageReaction < ActiveRecord::Base
+    self.table_name = "chat_message_reactions"
+
+    belongs_to :chat_message, class_name: "Chat::Message"
+    belongs_to :user
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/message_revision.rb

@@ -1,8 +1,12 @@
 # frozen_string_literal: true
 
-class ChatMessageRevision < ActiveRecord::Base
-  belongs_to :chat_message
-  belongs_to :user
+module Chat
+  class MessageRevision < ActiveRecord::Base
+    self.table_name = "chat_message_revisions"
+
+    belongs_to :chat_message, class_name: "Chat::Message"
+    belongs_to :user
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/reviewable_message.rb

@@ -0,0 +1,159 @@
+# frozen_string_literal: true
+
+module Chat
+  class ReviewableMessage < Reviewable
+    def serializer
+      Chat::ReviewableMessageSerializer
+    end
+
+    def self.action_aliases
+      {
+        agree_and_keep_hidden: :agree_and_delete,
+        agree_and_silence: :agree_and_delete,
+        agree_and_suspend: :agree_and_delete,
+        delete_and_agree: :agree_and_delete,
+      }
+    end
+
+    def self.score_to_silence_user
+      sensitivity_score(SiteSetting.chat_silence_user_sensitivity, scale: 0.6)
+    end
+
+    def chat_message
+      @chat_message ||= (target || Chat::Message.with_deleted.find_by(id: target_id))
+    end
+
+    def chat_message_creator
+      @chat_message_creator ||= chat_message.user
+    end
+
+    def flagged_by_user_ids
+      @flagged_by_user_ids ||= reviewable_scores.map(&:user_id)
+    end
+
+    def post
+      nil
+    end
+
+    def build_actions(actions, guardian, args)
+      return unless pending?
+      return if chat_message.blank?
+
+      agree =
+        actions.add_bundle(
+          "#{id}-agree",
+          icon: "thumbs-up",
+          label: "reviewables.actions.agree.title",
+        )
+
+      if chat_message.deleted_at?
+        build_action(actions, :agree_and_restore, icon: "far-eye", bundle: agree)
+        build_action(actions, :agree_and_keep_deleted, icon: "thumbs-up", bundle: agree)
+        build_action(actions, :disagree_and_restore, icon: "thumbs-down")
+      else
+        build_action(actions, :agree_and_delete, icon: "far-eye-slash", bundle: agree)
+        build_action(actions, :agree_and_keep_message, icon: "thumbs-up", bundle: agree)
+        build_action(actions, :disagree, icon: "thumbs-down")
+      end
+
+      if guardian.can_suspend?(chat_message_creator)
+        build_action(
+          actions,
+          :agree_and_suspend,
+          icon: "ban",
+          bundle: agree,
+          client_action: "suspend",
+        )
+        build_action(
+          actions,
+          :agree_and_silence,
+          icon: "microphone-slash",
+          bundle: agree,
+          client_action: "silence",
+        )
+      end
+
+      build_action(actions, :ignore, icon: "external-link-alt")
+
+      unless chat_message.deleted_at?
+        build_action(actions, :delete_and_agree, icon: "far-trash-alt")
+      end
+    end
+
+    def perform_agree_and_keep_message(performed_by, args)
+      agree
+    end
+
+    def perform_agree_and_restore(performed_by, args)
+      agree { chat_message.recover! }
+    end
+
+    def perform_agree_and_delete(performed_by, args)
+      agree { chat_message.trash!(performed_by) }
+    end
+
+    def perform_disagree_and_restore(performed_by, args)
+      disagree { chat_message.recover! }
+    end
+
+    def perform_disagree(performed_by, args)
+      disagree
+    end
+
+    def perform_ignore(performed_by, args)
+      ignore
+    end
+
+    def perform_delete_and_ignore(performed_by, args)
+      ignore { chat_message.trash!(performed_by) }
+    end
+
+    private
+
+    def agree
+      yield if block_given?
+      create_result(:success, :approved) do |result|
+        result.update_flag_stats = { status: :agreed, user_ids: flagged_by_user_ids }
+        result.recalculate_score = true
+      end
+    end
+
+    def disagree
+      yield if block_given?
+
+      UserSilencer.unsilence(chat_message_creator)
+
+      create_result(:success, :rejected) do |result|
+        result.update_flag_stats = { status: :disagreed, user_ids: flagged_by_user_ids }
+        result.recalculate_score = true
+      end
+    end
+
+    def ignore
+      yield if block_given?
+      create_result(:success, :ignored) do |result|
+        result.update_flag_stats = { status: :ignored, user_ids: flagged_by_user_ids }
+      end
+    end
+
+    def build_action(
+      actions,
+      id,
+      icon:,
+      button_class: nil,
+      bundle: nil,
+      client_action: nil,
+      confirm: false
+    )
+      actions.add(id, bundle: bundle) do |action|
+        prefix = "reviewables.actions.#{id}"
+        action.icon = icon
+        action.button_class = button_class
+        action.label = "chat.#{prefix}.title"
+        action.description = "chat.#{prefix}.description"
+        action.client_action = client_action
+        action.confirm_message = "#{prefix}.confirm" if confirm
+      end
+    end
+  end
+end

plugins/chat/app/models/chat/thread.rb

@@ -1,29 +1,34 @@
 # frozen_string_literal: true
 
-class ChatThread < ActiveRecord::Base
-  EXCERPT_LENGTH = 150
+module Chat
+  class Thread < ActiveRecord::Base
+    EXCERPT_LENGTH = 150
 
-  belongs_to :channel, foreign_key: "channel_id", class_name: "ChatChannel"
-  belongs_to :original_message_user, foreign_key: "original_message_user_id", class_name: "User"
-  belongs_to :original_message, foreign_key: "original_message_id", class_name: "ChatMessage"
+    self.table_name = "chat_threads"
 
-  has_many :chat_messages,
-           -> { order("chat_messages.created_at ASC, chat_messages.id ASC") },
-           foreign_key: :thread_id,
-           primary_key: :id
+    belongs_to :channel, foreign_key: "channel_id", class_name: "Chat::Channel"
+    belongs_to :original_message_user, foreign_key: "original_message_user_id", class_name: "User"
+    belongs_to :original_message, foreign_key: "original_message_id", class_name: "Chat::Message"
 
-  enum :status, { open: 0, read_only: 1, closed: 2, archived: 3 }, scopes: false
+    has_many :chat_messages,
+             -> { order("chat_messages.created_at ASC, chat_messages.id ASC") },
+             foreign_key: :thread_id,
+             primary_key: :id,
+             class_name: "Chat::Message"
 
-  def url
-    "#{channel.url}/t/#{self.id}"
-  end
+    enum :status, { open: 0, read_only: 1, closed: 2, archived: 3 }, scopes: false
 
-  def relative_url
-    "#{channel.relative_url}/t/#{self.id}"
-  end
+    def url
+      "#{channel.url}/t/#{self.id}"
+    end
 
-  def excerpt
-    original_message.excerpt(max_length: EXCERPT_LENGTH)
+    def relative_url
+      "#{channel.relative_url}/t/#{self.id}"
+    end
+
+    def excerpt
+      original_message.excerpt(max_length: EXCERPT_LENGTH)
+    end
   end
 end
 

plugins/chat/app/models/chat/upload.rb

@@ -5,11 +5,15 @@
 #
 # NOTE: Do not use this model anymore, chat messages are linked to uploads via
 # the UploadReference table now, just like everything else.
-class ChatUpload < ActiveRecord::Base
-  belongs_to :chat_message
-  belongs_to :upload
+module Chat
+  class Upload < ActiveRecord::Base
+    self.table_name = "chat_uploads"
 
-  deprecate *public_instance_methods(false)
+    belongs_to :chat_message, class_name: "Chat::Message"
+    belongs_to :upload
+
+    deprecate *public_instance_methods(false)
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/user_chat_channel_membership.rb

@@ -1,18 +1,22 @@
 # frozen_string_literal: true
 
-class UserChatChannelMembership < ActiveRecord::Base
-  NOTIFICATION_LEVELS = { never: 0, mention: 1, always: 2 }
+module Chat
+  class UserChatChannelMembership < ActiveRecord::Base
+    self.table_name = "user_chat_channel_memberships"
 
-  belongs_to :user
-  belongs_to :chat_channel
-  belongs_to :last_read_message, class_name: "ChatMessage", optional: true
+    NOTIFICATION_LEVELS = { never: 0, mention: 1, always: 2 }
 
-  enum :desktop_notification_level, NOTIFICATION_LEVELS, prefix: :desktop_notifications
-  enum :mobile_notification_level, NOTIFICATION_LEVELS, prefix: :mobile_notifications
-  enum :join_mode, { manual: 0, automatic: 1 }
+    belongs_to :user
+    belongs_to :last_read_message, class_name: "Chat::Message", optional: true
+    belongs_to :chat_channel, class_name: "Chat::Channel", foreign_key: :chat_channel_id
 
-  attribute :unread_count, default: 0
-  attribute :unread_mentions, default: 0
+    enum :desktop_notification_level, NOTIFICATION_LEVELS, prefix: :desktop_notifications
+    enum :mobile_notification_level, NOTIFICATION_LEVELS, prefix: :mobile_notifications
+    enum :join_mode, { manual: 0, automatic: 1 }
+
+    attribute :unread_count, default: 0
+    attribute :unread_mentions, default: 0
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat/view.rb

@@ -0,0 +1,95 @@
+# frozen_string_literal: true
+
+module Chat
+  class View
+    attr_reader :user, :chat_channel, :chat_messages, :can_load_more_past, :can_load_more_future
+
+    def initialize(
+      chat_channel:,
+      chat_messages:,
+      user:,
+      can_load_more_past: nil,
+      can_load_more_future: nil
+    )
+      @chat_channel = chat_channel
+      @chat_messages = chat_messages
+      @user = user
+      @can_load_more_past = can_load_more_past
+      @can_load_more_future = can_load_more_future
+    end
+
+    def reviewable_ids
+      return @reviewable_ids if defined?(@reviewable_ids)
+
+      @reviewable_ids = @user.staff? ? get_reviewable_ids : nil
+    end
+
+    def user_flag_statuses
+      return @user_flag_statuses if defined?(@user_flag_statuses)
+
+      @user_flag_statuses = get_user_flag_statuses
+    end
+
+    private
+
+    def get_reviewable_ids
+      sql = <<~SQL
+        SELECT
+          target_id,
+          MAX(r.id) reviewable_id
+        FROM
+          reviewables r
+        JOIN
+          reviewable_scores s ON reviewable_id = r.id
+        WHERE
+          r.target_id IN (:message_ids) AND
+          r.target_type = :target_type AND
+          s.status = :pending
+        GROUP BY
+          target_id
+    SQL
+
+      ids = {}
+
+      DB
+        .query(
+          sql,
+          pending: ReviewableScore.statuses[:pending],
+          message_ids: @chat_messages.map(&:id),
+          target_type: Chat::Message.sti_name,
+        )
+        .each { |row| ids[row.target_id] = row.reviewable_id }
+
+      ids
+    end
+
+    def get_user_flag_statuses
+      sql = <<~SQL
+        SELECT
+          target_id,
+          s.status
+        FROM
+          reviewables r
+        JOIN
+          reviewable_scores s ON reviewable_id = r.id
+        WHERE
+          s.user_id = :user_id AND
+          r.target_id IN (:message_ids) AND
+          r.target_type = :target_type
+    SQL
+
+      statuses = {}
+
+      DB
+        .query(
+          sql,
+          message_ids: @chat_messages.map(&:id),
+          user_id: @user.id,
+          target_type: Chat::Message.sti_name,
+        )
+        .each { |row| statuses[row.target_id] = row.status }
+
+      statuses
+    end
+  end
+end

plugins/chat/app/models/chat/webhook_event.rb

@@ -1,11 +1,15 @@
 # frozen_string_literal: true
 
-class ChatWebhookEvent < ActiveRecord::Base
-  belongs_to :chat_message
-  belongs_to :incoming_chat_webhook
+module Chat
+  class WebhookEvent < ActiveRecord::Base
+    self.table_name = "chat_webhook_events"
 
-  delegate :username, to: :incoming_chat_webhook
-  delegate :emoji, to: :incoming_chat_webhook
+    belongs_to :chat_message, class_name: "Chat::Message"
+    belongs_to :incoming_chat_webhook, class_name: "Chat::IncomingWebhook"
+
+    delegate :username, to: :incoming_chat_webhook
+    delegate :emoji, to: :incoming_chat_webhook
+  end
 end
 
 # == Schema Information

plugins/chat/app/models/chat_channel.rb

@@ -1,176 +0,0 @@
-# frozen_string_literal: true
-
-class ChatChannel < ActiveRecord::Base
-  include Trashable
-
-  belongs_to :chatable, polymorphic: true
-  belongs_to :direct_message,
-             -> { where(chat_channels: { chatable_type: "DirectMessage" }) },
-             foreign_key: "chatable_id"
-
-  has_many :chat_messages
-  has_many :user_chat_channel_memberships
-
-  has_one :chat_channel_archive
-
-  enum :status, { open: 0, read_only: 1, closed: 2, archived: 3 }, scopes: false
-
-  validates :name,
-            length: {
-              maximum: Proc.new { SiteSetting.max_topic_title_length },
-            },
-            presence: true,
-            allow_nil: true
-  validate :ensure_slug_ok, if: :slug_changed?
-  before_validation :generate_auto_slug
-
-  scope :public_channels,
-        -> {
-          where(chatable_type: public_channel_chatable_types).where(
-            "categories.id IS NOT NULL",
-          ).joins(
-            "LEFT JOIN categories ON categories.id = chat_channels.chatable_id AND chat_channels.chatable_type = 'Category'",
-          )
-        }
-
-  delegate :empty?, to: :chat_messages, prefix: true
-
-  class << self
-    def editable_statuses
-      statuses.filter { |k, _| !%w[read_only archived].include?(k) }
-    end
-
-    def public_channel_chatable_types
-      ["Category"]
-    end
-
-    def chatable_types
-      public_channel_chatable_types << "DirectMessage"
-    end
-  end
-
-  statuses.keys.each do |status|
-    define_method("#{status}!") { |acting_user| change_status(acting_user, status.to_sym) }
-  end
-
-  %i[
-    category_channel?
-    direct_message_channel?
-    public_channel?
-    chatable_has_custom_fields?
-    read_restricted?
-  ].each { |name| define_method(name) { false } }
-
-  %i[allowed_user_ids allowed_group_ids chatable_url].each { |name| define_method(name) { nil } }
-
-  def membership_for(user)
-    user_chat_channel_memberships.find_by(user: user)
-  end
-
-  def add(user)
-    Chat::ChatChannelMembershipManager.new(self).follow(user)
-  end
-
-  def remove(user)
-    Chat::ChatChannelMembershipManager.new(self).unfollow(user)
-  end
-
-  def url
-    "#{Discourse.base_url}/chat/c/#{self.slug || "-"}/#{self.id}"
-  end
-
-  def relative_url
-    "#{Discourse.base_path}/chat/c/#{self.slug || "-"}/#{self.id}"
-  end
-
-  def self.ensure_consistency!
-    update_counts
-  end
-
-  # TODO (martin) Move UpdateUserCountsForChatChannels into here
-  def self.update_counts
-    # NOTE: ChatChannel#messages_count is not updated every time
-    # a message is created or deleted in a channel, so it should not
-    # be displayed in the UI. It is updated eventually via Jobs::ChatPeriodicalUpdates
-    DB.exec <<~SQL
-      UPDATE chat_channels channels
-      SET messages_count = subquery.messages_count
-      FROM (
-        SELECT COUNT(*) AS messages_count, chat_channel_id
-        FROM chat_messages
-        WHERE chat_messages.deleted_at IS NULL
-        GROUP BY chat_channel_id
-      ) subquery
-      WHERE channels.id = subquery.chat_channel_id
-      AND channels.deleted_at IS NULL
-      AND subquery.messages_count != channels.messages_count
-    SQL
-  end
-
-  private
-
-  def change_status(acting_user, target_status)
-    return if !Guardian.new(acting_user).can_change_channel_status?(self, target_status)
-    self.update!(status: target_status)
-    log_channel_status_change(acting_user: acting_user)
-  end
-
-  def log_channel_status_change(acting_user:)
-    DiscourseEvent.trigger(
-      :chat_channel_status_change,
-      channel: self,
-      old_status: status_previously_was,
-      new_status: status,
-    )
-
-    StaffActionLogger.new(acting_user).log_custom(
-      "chat_channel_status_change",
-      {
-        chat_channel_id: self.id,
-        chat_channel_name: self.name,
-        previous_value: status_previously_was,
-        new_value: status,
-      },
-    )
-
-    ChatPublisher.publish_channel_status(self)
-  end
-
-  def duplicate_slug?
-    ChatChannel.where(slug: self.slug).where.not(id: self.id).any?
-  end
-end
-
-# == Schema Information
-#
-# Table name: chat_channels
-#
-#  id                           :bigint           not null, primary key
-#  chatable_id                  :integer          not null
-#  deleted_at                   :datetime
-#  deleted_by_id                :integer
-#  featured_in_category_id      :integer
-#  delete_after_seconds         :integer
-#  chatable_type                :string           not null
-#  created_at                   :datetime         not null
-#  updated_at                   :datetime         not null
-#  name                         :string
-#  description                  :text
-#  status                       :integer          default("open"), not null
-#  user_count                   :integer          default(0), not null
-#  last_message_sent_at         :datetime         not null
-#  auto_join_users              :boolean          default(FALSE), not null
-#  allow_channel_wide_mentions  :boolean          default(TRUE), not null
-#  user_count_stale             :boolean          default(FALSE), not null
-#  slug                         :string
-#  type                         :string
-#  threading_enabled            :boolean          default(FALSE), not null
-#
-# Indexes
-#
-#  index_chat_channels_on_messages_count             (messages_count)
-#  index_chat_channels_on_chatable_id                    (chatable_id)
-#  index_chat_channels_on_chatable_id_and_chatable_type  (chatable_id,chatable_type)
-#  index_chat_channels_on_slug                           (slug) UNIQUE
-#  index_chat_channels_on_status                         (status)
-#

plugins/chat/app/models/chat_message.rb

@@ -1,297 +0,0 @@
-# frozen_string_literal: true
-
-class ChatMessage < ActiveRecord::Base
-  include Trashable
-  attribute :has_oneboxes, default: false
-
-  BAKED_VERSION = 2
-
-  belongs_to :chat_channel
-  belongs_to :user
-  belongs_to :in_reply_to, class_name: "ChatMessage"
-  belongs_to :last_editor, class_name: "User"
-  belongs_to :thread, class_name: "ChatThread"
-
-  has_many :replies, class_name: "ChatMessage", foreign_key: "in_reply_to_id", dependent: :nullify
-  has_many :revisions, class_name: "ChatMessageRevision", dependent: :destroy
-  has_many :reactions, class_name: "ChatMessageReaction", dependent: :destroy
-  has_many :bookmarks, as: :bookmarkable, dependent: :destroy
-  has_many :upload_references, as: :target, dependent: :destroy
-  has_many :uploads, through: :upload_references
-
-  # TODO (martin) Remove this when we drop the ChatUpload table
-  has_many :chat_uploads, dependent: :destroy
-  has_one :chat_webhook_event, dependent: :destroy
-  has_many :chat_mentions, dependent: :destroy
-
-  scope :in_public_channel,
-        -> {
-          joins(:chat_channel).where(
-            chat_channel: {
-              chatable_type: ChatChannel.public_channel_chatable_types,
-            },
-          )
-        }
-
-  scope :in_dm_channel,
-        -> { joins(:chat_channel).where(chat_channel: { chatable_type: "DirectMessage" }) }
-
-  scope :created_before, ->(date) { where("chat_messages.created_at < ?", date) }
-
-  before_save { ensure_last_editor_id }
-
-  def validate_message(has_uploads:)
-    WatchedWordsValidator.new(attributes: [:message]).validate(self)
-
-    if self.new_record? || self.changed.include?("message")
-      Chat::DuplicateMessageValidator.new(self).validate
-    end
-
-    if !has_uploads && message_too_short?
-      self.errors.add(
-        :base,
-        I18n.t(
-          "chat.errors.minimum_length_not_met",
-          count: SiteSetting.chat_minimum_message_length,
-        ),
-      )
-    end
-
-    if message_too_long?
-      self.errors.add(
-        :base,
-        I18n.t("chat.errors.message_too_long", count: SiteSetting.chat_maximum_message_length),
-      )
-    end
-  end
-
-  def attach_uploads(uploads)
-    return if uploads.blank? || self.new_record?
-
-    now = Time.now
-    ref_record_attrs =
-      uploads.map do |upload|
-        {
-          upload_id: upload.id,
-          target_id: self.id,
-          target_type: "ChatMessage",
-          created_at: now,
-          updated_at: now,
-        }
-      end
-    UploadReference.insert_all!(ref_record_attrs)
-  end
-
-  def excerpt(max_length: 50)
-    # just show the URL if the whole message is a URL, because we cannot excerpt oneboxes
-    return message if UrlHelper.relaxed_parse(message).is_a?(URI)
-
-    # upload-only messages are better represented as the filename
-    return uploads.first.original_filename if cooked.blank? && uploads.present?
-
-    # this may return blank for some complex things like quotes, that is acceptable
-    PrettyText.excerpt(message, max_length, { text_entities: true })
-  end
-
-  def cooked_for_excerpt
-    (cooked.blank? && uploads.present?) ? "<p>#{uploads.first.original_filename}</p>" : cooked
-  end
-
-  def push_notification_excerpt
-    Emoji.gsub_emoji_to_unicode(message).truncate(400)
-  end
-
-  def to_markdown
-    upload_markdown =
-      self
-        .upload_references
-        .includes(:upload)
-        .order(:created_at)
-        .map(&:to_markdown)
-        .reject(&:empty?)
-
-    return self.message if upload_markdown.empty?
-
-    return ["#{self.message}\n"].concat(upload_markdown).join("\n") if self.message.present?
-
-    upload_markdown.join("\n")
-  end
-
-  def cook
-    ensure_last_editor_id
-
-    self.cooked = self.class.cook(self.message, user_id: self.last_editor_id)
-    self.cooked_version = BAKED_VERSION
-  end
-
-  def rebake!(invalidate_oneboxes: false, priority: nil)
-    ensure_last_editor_id
-
-    previous_cooked = self.cooked
-    new_cooked =
-      self.class.cook(
-        message,
-        invalidate_oneboxes: invalidate_oneboxes,
-        user_id: self.last_editor_id,
-      )
-    update_columns(cooked: new_cooked, cooked_version: BAKED_VERSION)
-    args = { chat_message_id: self.id }
-    args[:queue] = priority.to_s if priority && priority != :normal
-    args[:is_dirty] = true if previous_cooked != new_cooked
-
-    Jobs.enqueue(:process_chat_message, args)
-  end
-
-  def self.uncooked
-    where("cooked_version <> ? or cooked_version IS NULL", BAKED_VERSION)
-  end
-
-  MARKDOWN_FEATURES = %w[
-    anchor
-    bbcode-block
-    bbcode-inline
-    code
-    category-hashtag
-    censored
-    chat-transcript
-    discourse-local-dates
-    emoji
-    emojiShortcuts
-    inlineEmoji
-    html-img
-    hashtag-autocomplete
-    mentions
-    unicodeUsernames
-    onebox
-    quotes
-    spoiler-alert
-    table
-    text-post-process
-    upload-protocol
-    watched-words
-  ]
-
-  MARKDOWN_IT_RULES = %w[
-    autolink
-    list
-    backticks
-    newline
-    code
-    fence
-    image
-    table
-    linkify
-    link
-    strikethrough
-    blockquote
-    emphasis
-  ]
-
-  def self.cook(message, opts = {})
-    # A rule in our Markdown pipeline may have Guardian checks that require a
-    # user to be present. The last editing user of the message will be more
-    # generally up to date than the creating user. For example, we use
-    # this when cooking #hashtags to determine whether we should render
-    # the found hashtag based on whether the user can access the channel it
-    # is referencing.
-    cooked =
-      PrettyText.cook(
-        message,
-        features_override: MARKDOWN_FEATURES + DiscoursePluginRegistry.chat_markdown_features.to_a,
-        markdown_it_rules: MARKDOWN_IT_RULES,
-        force_quote_link: true,
-        user_id: opts[:user_id],
-        hashtag_context: "chat-composer",
-      )
-
-    result =
-      Oneboxer.apply(cooked) do |url|
-        if opts[:invalidate_oneboxes]
-          Oneboxer.invalidate(url)
-          InlineOneboxer.invalidate(url)
-        end
-        onebox = Oneboxer.cached_onebox(url)
-        onebox
-      end
-
-    cooked = result.to_html if result.changed?
-    cooked
-  end
-
-  def full_url
-    "#{Discourse.base_url}#{url}"
-  end
-
-  def url
-    "/chat/c/-/#{self.chat_channel_id}/#{self.id}"
-  end
-
-  def create_mentions(user_ids)
-    return if user_ids.empty?
-
-    now = Time.zone.now
-    mentions = []
-    User
-      .where(id: user_ids)
-      .find_each do |user|
-        mentions << { chat_message_id: self.id, user_id: user.id, created_at: now, updated_at: now }
-      end
-
-    ChatMention.insert_all(mentions)
-  end
-
-  def update_mentions(mentioned_user_ids)
-    old_mentions = chat_mentions.pluck(:user_id)
-    updated_mentions = mentioned_user_ids
-    mentioned_user_ids_to_drop = old_mentions - updated_mentions
-    mentioned_user_ids_to_add = updated_mentions - old_mentions
-
-    delete_mentions(mentioned_user_ids_to_drop)
-    create_mentions(mentioned_user_ids_to_add)
-  end
-
-  private
-
-  def delete_mentions(user_ids)
-    chat_mentions.where(user_id: user_ids).destroy_all
-  end
-
-  def message_too_short?
-    message.length < SiteSetting.chat_minimum_message_length
-  end
-
-  def message_too_long?
-    message.length > SiteSetting.chat_maximum_message_length
-  end
-
-  def ensure_last_editor_id
-    self.last_editor_id ||= self.user_id
-  end
-end
-
-# == Schema Information
-#
-# Table name: chat_messages
-#
-#  id              :bigint           not null, primary key
-#  chat_channel_id :integer          not null
-#  user_id         :integer
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  deleted_at      :datetime
-#  deleted_by_id   :integer
-#  in_reply_to_id  :integer
-#  message         :text
-#  cooked          :text
-#  cooked_version  :integer
-#  last_editor_id  :integer          not null
-#  thread_id       :integer
-#
-# Indexes
-#
-#  idx_chat_messages_by_created_at_not_deleted            (created_at) WHERE (deleted_at IS NULL)
-#  index_chat_messages_on_chat_channel_id_and_created_at  (chat_channel_id,created_at)
-#  index_chat_messages_on_chat_channel_id_and_id          (chat_channel_id,id) WHERE (deleted_at IS NULL)
-#  index_chat_messages_on_last_editor_id                  (last_editor_id)
-#  index_chat_messages_on_thread_id                       (thread_id)
-#

plugins/chat/app/models/chat_view.rb

@@ -1,87 +0,0 @@
-# frozen_string_literal: true
-
-class ChatView
-  attr_reader :user, :chat_channel, :chat_messages, :can_load_more_past, :can_load_more_future
-
-  def initialize(
-    chat_channel:,
-    chat_messages:,
-    user:,
-    can_load_more_past: nil,
-    can_load_more_future: nil
-  )
-    @chat_channel = chat_channel
-    @chat_messages = chat_messages
-    @user = user
-    @can_load_more_past = can_load_more_past
-    @can_load_more_future = can_load_more_future
-  end
-
-  def reviewable_ids
-    return @reviewable_ids if defined?(@reviewable_ids)
-
-    @reviewable_ids = @user.staff? ? get_reviewable_ids : nil
-  end
-
-  def user_flag_statuses
-    return @user_flag_statuses if defined?(@user_flag_statuses)
-
-    @user_flag_statuses = get_user_flag_statuses
-  end
-
-  private
-
-  def get_reviewable_ids
-    sql = <<~SQL
-        SELECT
-          target_id,
-          MAX(r.id) reviewable_id
-        FROM
-          reviewables r
-        JOIN
-          reviewable_scores s ON reviewable_id = r.id
-        WHERE
-          r.target_id IN (:message_ids) AND
-          r.target_type = 'ChatMessage' AND
-          s.status = :pending
-        GROUP BY
-          target_id
-    SQL
-
-    ids = {}
-
-    DB
-      .query(
-        sql,
-        pending: ReviewableScore.statuses[:pending],
-        message_ids: @chat_messages.map(&:id),
-      )
-      .each { |row| ids[row.target_id] = row.reviewable_id }
-
-    ids
-  end
-
-  def get_user_flag_statuses
-    sql = <<~SQL
-        SELECT
-          target_id,
-          s.status
-        FROM
-          reviewables r
-        JOIN
-          reviewable_scores s ON reviewable_id = r.id
-        WHERE
-          s.user_id = :user_id AND
-          r.target_id IN (:message_ids) AND
-          r.target_type = 'ChatMessage'
-    SQL
-
-    statuses = {}
-
-    DB
-      .query(sql, message_ids: @chat_messages.map(&:id), user_id: @user.id)
-      .each { |row| statuses[row.target_id] = row.status }
-
-    statuses
-  end
-end

plugins/chat/app/models/concerns/chat/chatable.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+module Chat
+  module Chatable
+    extend ActiveSupport::Concern
+
+    STI_CLASS_MAPPING = {
+      "CategoryChannel" => Chat::CategoryChannel,
+      "DirectMessageChannel" => Chat::DirectMessageChannel,
+    }
+
+    # the model used when loading type column
+    def self.sti_class_for(name)
+      STI_CLASS_MAPPING[name] if STI_CLASS_MAPPING.key?(name)
+    end
+
+    # the type column value
+    def self.sti_name_for(klass)
+      STI_CLASS_MAPPING.invert.fetch(klass)
+    end
+
+    POLYMORPHIC_CLASS_MAPPING = { "DirectMessage" => Chat::DirectMessage }
+
+    # the model used when loading chatable_type column
+    def self.polymorphic_class_for(name)
+      POLYMORPHIC_CLASS_MAPPING[name] if POLYMORPHIC_CLASS_MAPPING.key?(name)
+    end
+
+    # the chatable_type column value
+    def self.polymorphic_name_for(klass)
+      POLYMORPHIC_CLASS_MAPPING.invert.fetch(klass)
+    end
+
+    def chat_channel
+      channel_class.new(chatable: self)
+    end
+
+    def create_chat_channel!(**args)
+      channel_class.create!(args.merge(chatable: self))
+    end
+
+    private
+
+    def channel_class
+      case self
+      when Chat::DirectMessage
+        Chat::DirectMessageChannel
+      when Category
+        Chat::CategoryChannel
+      else
+        raise("Unknown chatable #{self}")
+      end
+    end
+  end
+end

plugins/chat/app/models/concerns/chatable.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-module Chatable
-  extend ActiveSupport::Concern
-
-  def chat_channel
-    channel_class.new(chatable: self)
-  end
-
-  def create_chat_channel!(**args)
-    channel_class.create!(args.merge(chatable: self))
-  end
-
-  private
-
-  def channel_class
-    "#{self.class}Channel".safe_constantize || raise("Unknown chatable #{self}")
-  end
-end

plugins/chat/app/models/deleted_chat_user.rb

@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-class DeletedChatUser < User
-  def username
-    I18n.t("chat.deleted_chat_username")
-  end
-
-  def avatar_template
-    "/plugins/chat/images/deleted-chat-user-avatar.png"
-  end
-
-  def bot?
-    false
-  end
-end

plugins/chat/app/models/direct_message.rb

@@ -1,59 +0,0 @@
-# frozen_string_literal: true
-
-class DirectMessage < ActiveRecord::Base
-  self.table_name = "direct_message_channels"
-
-  include Chatable
-
-  has_many :direct_message_users, foreign_key: :direct_message_channel_id
-  has_many :users, through: :direct_message_users
-
-  def self.for_user_ids(user_ids)
-    joins(:users)
-      .group("direct_message_channels.id")
-      .having("ARRAY[?] = ARRAY_AGG(users.id ORDER BY users.id)", user_ids.sort)
-      &.first
-  end
-
-  def user_can_access?(user)
-    users.include?(user)
-  end
-
-  def chat_channel_title_for_user(chat_channel, acting_user)
-    users =
-      (direct_message_users.map(&:user) - [acting_user]).map { |user| user || DeletedChatUser.new }
-
-    # direct message to self
-    if users.empty?
-      return I18n.t("chat.channel.dm_title.single_user", username: "@#{acting_user.username}")
-    end
-
-    # all users deleted
-    return chat_channel.id if !users.first
-
-    usernames_formatted = users.sort_by(&:username).map { |u| "@#{u.username}" }
-    if usernames_formatted.size > 5
-      return(
-        I18n.t(
-          "chat.channel.dm_title.multi_user_truncated",
-          comma_separated_usernames: usernames_formatted[0..4].join(I18n.t("word_connector.comma")),
-          count: usernames_formatted.length - 5,
-        )
-      )
-    end
-
-    I18n.t(
-      "chat.channel.dm_title.multi_user",
-      comma_separated_usernames: usernames_formatted.join(I18n.t("word_connector.comma")),
-    )
-  end
-end
-
-# == Schema Information
-#
-# Table name: direct_message_channels
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#

plugins/chat/app/models/direct_message_channel.rb

@@ -1,29 +0,0 @@
-# frozen_string_literal: true
-
-class DirectMessageChannel < ChatChannel
-  alias_attribute :direct_message, :chatable
-
-  def direct_message_channel?
-    true
-  end
-
-  def allowed_user_ids
-    direct_message.user_ids
-  end
-
-  def read_restricted?
-    true
-  end
-
-  def title(user)
-    direct_message.chat_channel_title_for_user(self, user)
-  end
-
-  def ensure_slug_ok
-    true
-  end
-
-  def generate_auto_slug
-    self.slug = nil
-  end
-end

plugins/chat/app/models/reviewable_chat_message.rb

@@ -1,149 +0,0 @@
-# frozen_string_literal: true
-
-require_dependency "reviewable"
-
-class ReviewableChatMessage < Reviewable
-  def self.action_aliases
-    {
-      agree_and_keep_hidden: :agree_and_delete,
-      agree_and_silence: :agree_and_delete,
-      agree_and_suspend: :agree_and_delete,
-      delete_and_agree: :agree_and_delete,
-    }
-  end
-
-  def self.score_to_silence_user
-    sensitivity_score(SiteSetting.chat_silence_user_sensitivity, scale: 0.6)
-  end
-
-  def chat_message
-    @chat_message ||= (target || ChatMessage.with_deleted.find_by(id: target_id))
-  end
-
-  def chat_message_creator
-    @chat_message_creator ||= chat_message.user
-  end
-
-  def flagged_by_user_ids
-    @flagged_by_user_ids ||= reviewable_scores.map(&:user_id)
-  end
-
-  def post
-    nil
-  end
-
-  def build_actions(actions, guardian, args)
-    return unless pending?
-    return if chat_message.blank?
-
-    agree =
-      actions.add_bundle("#{id}-agree", icon: "thumbs-up", label: "reviewables.actions.agree.title")
-
-    if chat_message.deleted_at?
-      build_action(actions, :agree_and_restore, icon: "far-eye", bundle: agree)
-      build_action(actions, :agree_and_keep_deleted, icon: "thumbs-up", bundle: agree)
-      build_action(actions, :disagree_and_restore, icon: "thumbs-down")
-    else
-      build_action(actions, :agree_and_delete, icon: "far-eye-slash", bundle: agree)
-      build_action(actions, :agree_and_keep_message, icon: "thumbs-up", bundle: agree)
-      build_action(actions, :disagree, icon: "thumbs-down")
-    end
-
-    if guardian.can_suspend?(chat_message_creator)
-      build_action(
-        actions,
-        :agree_and_suspend,
-        icon: "ban",
-        bundle: agree,
-        client_action: "suspend",
-      )
-      build_action(
-        actions,
-        :agree_and_silence,
-        icon: "microphone-slash",
-        bundle: agree,
-        client_action: "silence",
-      )
-    end
-
-    build_action(actions, :ignore, icon: "external-link-alt")
-
-    build_action(actions, :delete_and_agree, icon: "far-trash-alt") unless chat_message.deleted_at?
-  end
-
-  def perform_agree_and_keep_message(performed_by, args)
-    agree
-  end
-
-  def perform_agree_and_restore(performed_by, args)
-    agree { chat_message.recover! }
-  end
-
-  def perform_agree_and_delete(performed_by, args)
-    agree { chat_message.trash!(performed_by) }
-  end
-
-  def perform_disagree_and_restore(performed_by, args)
-    disagree { chat_message.recover! }
-  end
-
-  def perform_disagree(performed_by, args)
-    disagree
-  end
-
-  def perform_ignore(performed_by, args)
-    ignore
-  end
-
-  def perform_delete_and_ignore(performed_by, args)
-    ignore { chat_message.trash!(performed_by) }
-  end
-
-  private
-
-  def agree
-    yield if block_given?
-    create_result(:success, :approved) do |result|
-      result.update_flag_stats = { status: :agreed, user_ids: flagged_by_user_ids }
-      result.recalculate_score = true
-    end
-  end
-
-  def disagree
-    yield if block_given?
-
-    UserSilencer.unsilence(chat_message_creator)
-
-    create_result(:success, :rejected) do |result|
-      result.update_flag_stats = { status: :disagreed, user_ids: flagged_by_user_ids }
-      result.recalculate_score = true
-    end
-  end
-
-  def ignore
-    yield if block_given?
-    create_result(:success, :ignored) do |result|
-      result.update_flag_stats = { status: :ignored, user_ids: flagged_by_user_ids }
-    end
-  end
-
-  def build_action(
-    actions,
-    id,
-    icon:,
-    button_class: nil,
-    bundle: nil,
-    client_action: nil,
-    confirm: false
-  )
-    actions.add(id, bundle: bundle) do |action|
-      prefix = "reviewables.actions.#{id}"
-      action.icon = icon
-      action.button_class = button_class
-      action.label = "chat.#{prefix}.title"
-      action.description = "chat.#{prefix}.description"
-      action.client_action = client_action
-      action.confirm_message = "#{prefix}.confirm" if confirm
-    end
-  end
-end

plugins/chat/app/queries/chat/channel_memberships_query.rb

@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+module Chat
+  class ChannelMembershipsQuery
+    def self.call(channel:, limit: 50, offset: 0, username: nil, count_only: false)
+      query =
+        Chat::UserChatChannelMembership
+          .joins(:user)
+          .includes(:user)
+          .where(user: User.activated.not_suspended.not_staged)
+          .where(chat_channel: channel, following: true)
+
+      return query.count if count_only
+
+      if channel.category_channel? && channel.read_restricted? && channel.allowed_group_ids
+        query =
+          query.where(
+            "user_id IN (SELECT user_id FROM group_users WHERE group_id IN (?))",
+            channel.allowed_group_ids,
+          )
+      end
+
+      if username.present?
+        if SiteSetting.prioritize_username_in_ux || !SiteSetting.enable_names
+          query = query.where("users.username_lower ILIKE ?", "%#{username}%")
+        else
+          query =
+            query.where(
+              "LOWER(users.name) ILIKE ? OR users.username_lower ILIKE ?",
+              "%#{username}%",
+              "%#{username}%",
+            )
+        end
+      end
+
+      if SiteSetting.prioritize_username_in_ux || !SiteSetting.enable_names
+        query = query.order("users.username_lower ASC")
+      else
+        query = query.order("users.name ASC, users.username_lower ASC")
+      end
+
+      query.offset(offset).limit(limit)
+    end
+
+    def self.count(channel)
+      call(channel: channel, count_only: true)
+    end
+  end
+end

plugins/chat/app/queries/chat/channel_unreads_query.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
-class ChatChannelUnreadsQuery
-  def self.call(channel_id:, user_id:)
-    sql = <<~SQL
+module Chat
+  class ChannelUnreadsQuery
+    def self.call(channel_id:, user_id:)
+      sql = <<~SQL
       SELECT (
       SELECT COUNT(*) AS unread_count
       FROM chat_messages
@@ -27,14 +28,15 @@ class ChatChannelUnreadsQuery
     ) AS mention_count;
     SQL
 
-    DB
-      .query(
-        sql,
-        channel_id: channel_id,
-        user_id: user_id,
-        notification_type: Notification.types[:chat_mention],
-      )
-      .first
-      .to_h
+      DB
+        .query(
+          sql,
+          channel_id: channel_id,
+          user_id: user_id,
+          notification_type: Notification.types[:chat_mention],
+        )
+        .first
+        .to_h
+    end
   end
 end

plugins/chat/app/queries/chat_channel_memberships_query.rb

@@ -1,47 +0,0 @@
-# frozen_string_literal: true
-
-class ChatChannelMembershipsQuery
-  def self.call(channel:, limit: 50, offset: 0, username: nil, count_only: false)
-    query =
-      UserChatChannelMembership
-        .joins(:user)
-        .includes(:user)
-        .where(user: User.activated.not_suspended.not_staged)
-        .where(chat_channel: channel, following: true)
-
-    return query.count if count_only
-
-    if channel.category_channel? && channel.read_restricted? && channel.allowed_group_ids
-      query =
-        query.where(
-          "user_id IN (SELECT user_id FROM group_users WHERE group_id IN (?))",
-          channel.allowed_group_ids,
-        )
-    end
-
-    if username.present?
-      if SiteSetting.prioritize_username_in_ux || !SiteSetting.enable_names
-        query = query.where("users.username_lower ILIKE ?", "%#{username}%")
-      else
-        query =
-          query.where(
-            "LOWER(users.name) ILIKE ? OR users.username_lower ILIKE ?",
-            "%#{username}%",
-            "%#{username}%",
-          )
-      end
-    end
-
-    if SiteSetting.prioritize_username_in_ux || !SiteSetting.enable_names
-      query = query.order("users.username_lower ASC")
-    else
-      query = query.order("users.name ASC, users.username_lower ASC")
-    end
-
-    query.offset(offset).limit(limit)
-  end
-
-  def self.count(channel)
-    call(channel: channel, count_only: true)
-  end
-end

plugins/chat/app/serializers/admin_chat_index_serializer.rb

@@ -1,14 +0,0 @@
-# frozen_string_literal: true
-
-class AdminChatIndexSerializer < ApplicationSerializer
-  has_many :chat_channels, serializer: ChatChannelSerializer, embed: :objects
-  has_many :incoming_chat_webhooks, serializer: IncomingChatWebhookSerializer, embed: :objects
-
-  def chat_channels
-    object[:chat_channels]
-  end
-
-  def incoming_chat_webhooks
-    object[:incoming_chat_webhooks]
-  end
-end

plugins/chat/app/serializers/base_chat_channel_membership_serializer.rb

@@ -1,12 +0,0 @@
-# frozen_string_literal: true
-
-class BaseChatChannelMembershipSerializer < ApplicationSerializer
-  attributes :following,
-             :muted,
-             :desktop_notification_level,
-             :mobile_notification_level,
-             :chat_channel_id,
-             :last_read_message_id,
-             :unread_count,
-             :unread_mentions
-end

plugins/chat/app/serializers/chat/admin_chat_index_serializer.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module Chat
+  class AdminChatIndexSerializer < ApplicationSerializer
+    has_many :chat_channels, serializer: Chat::ChannelSerializer, embed: :objects
+    has_many :incoming_chat_webhooks, serializer: Chat::IncomingWebhookSerializer, embed: :objects
+
+    def chat_channels
+      object[:chat_channels]
+    end
+
+    def incoming_chat_webhooks
+      object[:incoming_chat_webhooks]
+    end
+  end
+end

plugins/chat/app/serializers/chat/base_channel_membership_serializer.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+module Chat
+  class BaseChannelMembershipSerializer < ApplicationSerializer
+    attributes :following,
+               :muted,
+               :desktop_notification_level,
+               :mobile_notification_level,
+               :chat_channel_id,
+               :last_read_message_id,
+               :unread_count,
+               :unread_mentions
+  end
+end