cedcdb0057
Due to default CSP web workers instantiated from CDN based assets are still
treated as "same-origin" meaning that we had no way of safely instansiating
a web worker from a theme.
This limits the theme system and adds the arbitrary restriction that WASM
based components can not be safely used.
To resolve this limitation all js assets in about.json are also cached on
local domain.
{
"name": "Header Icons",
"assets" : {
"worker" : "assets/worker.js"
}
}
This can then be referenced in JS via:
settings.theme_uploads_local.worker
local_js_assets are unconditionally served from the site directly and
bypass the entire CDN, using the pre-existing JavascriptCache
Previous to this change this code was completely dormant on sites which
used s3 based uploads, this reuses the very well tested and cached asset
system on s3 based sites.
Note, when creating local_js_assets it is highly recommended to keep the
assets lean and keep all the heavy working in CDN based assets. For example
wasm files can still live on the CDN but the lean worker that loads it can
live on local.
This change unlocks wasm in theme components, so wasm is now also allowed
in `theme_authorized_extensions`
* more usages of upload.content
* add a specific test for upload.content
* Adjust logic to ensure that after upgrades we still get a cached local js
on save
762 lines
22 KiB
Ruby
762 lines
22 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'global_path'
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require 'csv'
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require 'json_schemer'
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class Theme < ActiveRecord::Base
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include GlobalPath
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attr_accessor :child_components
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@cache = DistributedCache.new('theme')
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belongs_to :user
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belongs_to :color_scheme
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has_many :theme_fields, dependent: :destroy
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has_many :theme_settings, dependent: :destroy
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has_many :theme_translation_overrides, dependent: :destroy
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has_many :child_theme_relation, class_name: 'ChildTheme', foreign_key: 'parent_theme_id', dependent: :destroy
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has_many :parent_theme_relation, class_name: 'ChildTheme', foreign_key: 'child_theme_id', dependent: :destroy
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has_many :child_themes, -> { order(:name) }, through: :child_theme_relation, source: :child_theme
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has_many :parent_themes, -> { order(:name) }, through: :parent_theme_relation, source: :parent_theme
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has_many :color_schemes
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belongs_to :remote_theme, dependent: :destroy
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has_one :theme_modifier_set, dependent: :destroy
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has_one :settings_field, -> { where(target_id: Theme.targets[:settings], name: "yaml") }, class_name: 'ThemeField'
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has_one :javascript_cache, dependent: :destroy
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has_many :locale_fields, -> { filter_locale_fields(I18n.fallbacks[I18n.locale]) }, class_name: 'ThemeField'
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has_many :upload_fields, -> { where(type_id: ThemeField.types[:theme_upload_var]).preload(:upload) }, class_name: 'ThemeField'
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has_many :extra_scss_fields, -> { where(target_id: Theme.targets[:extra_scss]) }, class_name: 'ThemeField'
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has_many :yaml_theme_fields, -> { where("name = 'yaml' AND type_id = ?", ThemeField.types[:yaml]) }, class_name: 'ThemeField'
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has_many :var_theme_fields, -> { where("type_id IN (?)", ThemeField.theme_var_type_ids) }, class_name: 'ThemeField'
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has_many :builder_theme_fields, -> { where("name IN (?)", ThemeField.scss_fields) }, class_name: 'ThemeField'
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validate :component_validations
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after_create :update_child_components
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scope :user_selectable, ->() {
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where('user_selectable OR id = ?', SiteSetting.default_theme_id)
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}
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scope :include_relations, -> {
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includes(:child_themes,
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:parent_themes,
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:remote_theme,
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:theme_settings,
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:settings_field,
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:locale_fields,
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:user,
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:color_scheme,
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:theme_translation_overrides,
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theme_fields: :upload
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)
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}
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def notify_color_change(color, scheme: nil)
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scheme ||= color.color_scheme
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changed_colors << color if color
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changed_schemes << scheme if scheme
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end
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def theme_modifier_set
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super || build_theme_modifier_set
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end
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after_save do
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changed_colors.each(&:save!)
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changed_schemes.each(&:save!)
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changed_colors.clear
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changed_schemes.clear
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changed_fields.each(&:save!)
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changed_fields.clear
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theme_modifier_set.save!
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if saved_change_to_name?
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theme_fields.select(&:basic_html_field?).each(&:invalidate_baked!)
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end
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Theme.expire_site_cache! if saved_change_to_color_scheme_id? || saved_change_to_user_selectable? || saved_change_to_name?
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notify_with_scheme = saved_change_to_color_scheme_id?
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reload
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settings_field&.ensure_baked! # Other fields require setting to be **baked**
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theme_fields.each(&:ensure_baked!)
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update_javascript_cache!
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remove_from_cache!
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DB.after_commit { ColorScheme.hex_cache.clear }
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notify_theme_change(with_scheme: notify_with_scheme)
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if theme_setting_requests_refresh
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DB.after_commit do
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Discourse.request_refresh!
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self.theme_setting_requests_refresh = false
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end
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end
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end
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def update_child_components
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if !component? && child_components.present?
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child_components.each do |url|
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url = ThemeStore::GitImporter.new(url.strip).url
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theme = RemoteTheme.find_by(remote_url: url)&.theme
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theme ||= RemoteTheme.import_theme(url, user)
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child_themes << theme
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end
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end
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end
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def update_javascript_cache!
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all_extra_js = theme_fields
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.where(target_id: Theme.targets[:extra_js])
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.order(:name, :id)
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.pluck(:value_baked)
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.join("\n")
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if all_extra_js.present?
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js_compiler = ThemeJavascriptCompiler.new(id, name)
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js_compiler.append_raw_script(all_extra_js)
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settings_hash = build_settings_hash
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js_compiler.prepend_settings(settings_hash) if settings_hash.present?
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javascript_cache || build_javascript_cache
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javascript_cache.update!(content: js_compiler.content)
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else
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javascript_cache&.destroy!
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end
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end
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after_destroy do
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remove_from_cache!
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if SiteSetting.default_theme_id == self.id
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Theme.clear_default!
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end
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if self.id
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ColorScheme
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.where(theme_id: self.id)
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.where("id NOT IN (SELECT color_scheme_id FROM themes where color_scheme_id IS NOT NULL)")
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.destroy_all
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ColorScheme
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.where(theme_id: self.id)
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.update_all(theme_id: nil)
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end
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Theme.expire_site_cache!
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ColorScheme.hex_cache.clear
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CSP::Extension.clear_theme_extensions_cache!
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SvgSprite.expire_cache
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end
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BASE_COMPILER_VERSION = 55
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def self.compiler_version
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get_set_cache "compiler_version" do
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dependencies = [
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BASE_COMPILER_VERSION,
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Ember::VERSION,
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GlobalSetting.cdn_url,
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Discourse.current_hostname
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]
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Digest::SHA1.hexdigest(dependencies.join)
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end
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end
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def self.get_set_cache(key, &blk)
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@cache.defer_get_set(key, &blk)
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end
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def self.theme_ids
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get_set_cache "theme_ids" do
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Theme.pluck(:id)
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end
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end
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def self.parent_theme_ids
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get_set_cache "parent_theme_ids" do
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Theme.where(component: false).pluck(:id)
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end
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end
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def self.is_parent_theme?(id)
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self.parent_theme_ids.include?(id)
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end
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def self.user_theme_ids
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get_set_cache "user_theme_ids" do
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Theme.user_selectable.pluck(:id)
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end
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end
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def self.allowed_remote_theme_ids
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return nil if GlobalSetting.allowed_theme_repos.blank?
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get_set_cache "allowed_remote_theme_ids" do
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urls = GlobalSetting.allowed_theme_repos.split(",").map(&:strip)
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Theme
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.joins(:remote_theme)
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.where('remote_themes.remote_url in (?)', urls)
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.pluck(:id)
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end
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end
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def self.components_for(theme_id)
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get_set_cache "theme_components_for_#{theme_id}" do
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ChildTheme.where(parent_theme_id: theme_id).pluck(:child_theme_id)
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end
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end
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def self.expire_site_cache!
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Site.clear_anon_cache!
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clear_cache!
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ApplicationSerializer.expire_cache_fragment!("user_themes")
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ColorScheme.hex_cache.clear
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end
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def self.clear_default!
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SiteSetting.default_theme_id = -1
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expire_site_cache!
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end
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def self.transform_ids(id)
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return [] if id.blank?
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id = id.to_i
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get_set_cache "transformed_ids_#{id}" do
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all_ids =
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if self.is_parent_theme?(id)
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components = components_for(id).tap { |c| c.sort!.uniq! }
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[id, *components]
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else
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[id]
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end
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disabled_ids = Theme.where(id: all_ids)
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.includes(:remote_theme)
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.select { |t| !t.supported? || !t.enabled? }
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.map(&:id)
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all_ids - disabled_ids
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end
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end
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def set_default!
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if component
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raise Discourse::InvalidParameters.new(
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I18n.t("themes.errors.component_no_default")
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)
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end
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SiteSetting.default_theme_id = id
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Theme.expire_site_cache!
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end
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def default?
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SiteSetting.default_theme_id == id
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end
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def supported?
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if minimum_version = remote_theme&.minimum_discourse_version
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return false unless Discourse.has_needed_version?(Discourse::VERSION::STRING, minimum_version)
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end
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if maximum_version = remote_theme&.maximum_discourse_version
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return false unless Discourse.has_needed_version?(maximum_version, Discourse::VERSION::STRING)
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end
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true
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end
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def component_validations
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return unless component
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errors.add(:base, I18n.t("themes.errors.component_no_color_scheme")) if color_scheme_id.present?
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errors.add(:base, I18n.t("themes.errors.component_no_user_selectable")) if user_selectable
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errors.add(:base, I18n.t("themes.errors.component_no_default")) if default?
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end
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def switch_to_component!
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return if component
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Theme.transaction do
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self.component = true
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self.color_scheme_id = nil
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self.user_selectable = false
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Theme.clear_default! if default?
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ChildTheme.where("parent_theme_id = ?", id).destroy_all
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self.save!
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end
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end
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def switch_to_theme!
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return unless component
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Theme.transaction do
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self.enabled = true
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self.component = false
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ChildTheme.where("child_theme_id = ?", id).destroy_all
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self.save!
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end
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end
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def self.lookup_field(theme_id, target, field, skip_transformation: false)
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return "" if theme_id.blank?
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theme_ids = !skip_transformation ? transform_ids(theme_id) : [theme_id]
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cache_key = "#{theme_ids.join(",")}:#{target}:#{field}:#{Theme.compiler_version}"
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lookup = @cache[cache_key]
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return lookup.html_safe if lookup
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target = target.to_sym
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val = resolve_baked_field(theme_ids, target, field)
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get_set_cache(cache_key) { val || "" }.html_safe
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end
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def self.lookup_modifier(theme_ids, modifier_name)
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theme_ids = [theme_ids] unless theme_ids.is_a?(Array)
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get_set_cache("#{theme_ids.join(",")}:modifier:#{modifier_name}:#{Theme.compiler_version}") do
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ThemeModifierSet.resolve_modifier_for_themes(theme_ids, modifier_name)
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end
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end
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def self.remove_from_cache!
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clear_cache!
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end
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def self.clear_cache!
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DB.after_commit do
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@cache.clear
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end
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end
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def self.targets
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@targets ||= Enum.new(common: 0, desktop: 1, mobile: 2, settings: 3, translations: 4, extra_scss: 5, extra_js: 6, tests_js: 7)
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end
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def self.lookup_target(target_id)
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self.targets.invert[target_id]
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end
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def self.notify_theme_change(theme_ids, with_scheme: false, clear_manager_cache: true, all_themes: false)
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Stylesheet::Manager.clear_theme_cache!
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targets = [:mobile_theme, :desktop_theme]
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if with_scheme
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targets.prepend(:desktop, :mobile, :admin)
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targets.append(*Discourse.find_plugin_css_assets(mobile_view: true, desktop_view: true))
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Stylesheet::Manager.cache.clear if clear_manager_cache
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end
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if all_themes
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message = theme_ids.map { |id| refresh_message_for_targets(targets, id) }.flatten
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else
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message = refresh_message_for_targets(targets, theme_ids).flatten
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end
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MessageBus.publish('/file-change', message)
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end
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def notify_theme_change(with_scheme: false)
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DB.after_commit do
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theme_ids = Theme.transform_ids(id)
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self.class.notify_theme_change(theme_ids, with_scheme: with_scheme)
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end
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end
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def self.refresh_message_for_targets(targets, theme_ids)
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theme_ids = [theme_ids] unless theme_ids.is_a?(Array)
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targets.each_with_object([]) do |target, data|
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theme_ids.each do |theme_id|
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data << Stylesheet::Manager.new(theme_id: theme_id).stylesheet_data(target.to_sym)
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end
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end
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end
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def self.resolve_baked_field(theme_ids, target, name)
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if target == :extra_js
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require_rebake = ThemeField.where(theme_id: theme_ids, target_id: Theme.targets[:extra_js]).
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where("compiler_version <> ?", Theme.compiler_version)
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require_rebake.each { |tf| tf.ensure_baked! }
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require_rebake.map(&:theme_id).uniq.each do |theme_id|
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Theme.find(theme_id).update_javascript_cache!
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end
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caches = JavascriptCache.where(theme_id: theme_ids)
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caches = caches.sort_by { |cache| theme_ids.index(cache.theme_id) }
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return caches.map { |c| "<script src='#{c.url}' data-theme-id='#{c.theme_id}'></script>" }.join("\n")
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end
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list_baked_fields(theme_ids, target, name).map { |f| f.value_baked || f.value }.join("\n")
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end
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def self.list_baked_fields(theme_ids, target, name)
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target = target.to_sym
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name = name&.to_sym
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if target == :translations
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fields = ThemeField.find_first_locale_fields(theme_ids, I18n.fallbacks[name])
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else
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target = :mobile if target == :mobile_theme
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target = :desktop if target == :desktop_theme
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fields = ThemeField.find_by_theme_ids(theme_ids)
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.where(target_id: [Theme.targets[target], Theme.targets[:common]])
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fields = fields.where(name: name.to_s) unless name.nil?
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fields = fields.order(:target_id)
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end
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fields.each(&:ensure_baked!)
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fields
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end
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def resolve_baked_field(target, name)
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list_baked_fields(target, name).map { |f| f.value_baked || f.value }.join("\n")
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end
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def list_baked_fields(target, name)
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theme_ids = Theme.transform_ids(id)
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theme_ids = [theme_ids.first] if name != :color_definitions
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self.class.list_baked_fields(theme_ids, target, name)
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end
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def remove_from_cache!
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self.class.remove_from_cache!
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end
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def changed_fields
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@changed_fields ||= []
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end
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def changed_colors
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@changed_colors ||= []
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end
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def changed_schemes
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@changed_schemes ||= Set.new
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end
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def set_field(target:, name:, value: nil, type: nil, type_id: nil, upload_id: nil)
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name = name.to_s
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target_id = Theme.targets[target.to_sym]
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raise "Unknown target #{target} passed to set field" unless target_id
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type_id ||= type ? ThemeField.types[type.to_sym] : ThemeField.guess_type(name: name, target: target)
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raise "Unknown type #{type} passed to set field" unless type_id
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value ||= ""
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field = theme_fields.find { |f| f.name == name && f.target_id == target_id && f.type_id == type_id }
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if field
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if value.blank? && !upload_id
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theme_fields.delete field.destroy
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else
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if field.value != value || field.upload_id != upload_id
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field.value = value
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field.upload_id = upload_id
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changed_fields << field
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end
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end
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field
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else
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theme_fields.build(target_id: target_id, value: value, name: name, type_id: type_id, upload_id: upload_id) if value.present? || upload_id.present?
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end
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end
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def add_relative_theme!(kind, theme)
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new_relation = if kind == :child
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child_theme_relation.new(child_theme_id: theme.id)
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else
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parent_theme_relation.new(parent_theme_id: theme.id)
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end
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if new_relation.save
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child_themes.reload
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parent_themes.reload
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save!
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Theme.clear_cache!
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else
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raise Discourse::InvalidParameters.new(new_relation.errors.full_messages.join(", "))
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end
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end
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def internal_translations
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@internal_translations ||= translations(internal: true)
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end
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def translations(internal: false)
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fallbacks = I18n.fallbacks[I18n.locale]
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begin
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data = locale_fields.first&.translation_data(with_overrides: false, internal: internal, fallback_fields: locale_fields)
|
|
return {} if data.nil?
|
|
best_translations = {}
|
|
fallbacks.reverse.each do |locale|
|
|
best_translations.deep_merge! data[locale] if data[locale]
|
|
end
|
|
ThemeTranslationManager.list_from_hash(theme: self, hash: best_translations, locale: I18n.locale)
|
|
rescue ThemeTranslationParser::InvalidYaml
|
|
{}
|
|
end
|
|
end
|
|
|
|
def settings
|
|
field = settings_field
|
|
return [] unless field && field.error.nil?
|
|
|
|
settings = []
|
|
ThemeSettingsParser.new(field).load do |name, default, type, opts|
|
|
settings << ThemeSettingsManager.create(name, default, type, self, opts)
|
|
end
|
|
settings
|
|
end
|
|
|
|
def cached_settings
|
|
Theme.get_set_cache "settings_for_theme_#{self.id}" do
|
|
build_settings_hash
|
|
end
|
|
end
|
|
|
|
def cached_default_settings
|
|
Theme.get_set_cache "default_settings_for_theme_#{self.id}" do
|
|
settings_hash = {}
|
|
self.settings.each do |setting|
|
|
settings_hash[setting.name] = setting.default
|
|
end
|
|
settings_hash
|
|
end
|
|
end
|
|
|
|
def build_settings_hash
|
|
hash = {}
|
|
self.settings.each do |setting|
|
|
hash[setting.name] = setting.value
|
|
end
|
|
|
|
theme_uploads = {}
|
|
theme_uploads_local = {}
|
|
|
|
upload_fields.each do |field|
|
|
if field.upload&.url
|
|
theme_uploads[field.name] = Discourse.store.cdn_url(field.upload.url)
|
|
end
|
|
if field.javascript_cache
|
|
theme_uploads_local[field.name] = field.javascript_cache.local_url
|
|
end
|
|
end
|
|
|
|
hash['theme_uploads'] = theme_uploads if theme_uploads.present?
|
|
hash['theme_uploads_local'] = theme_uploads_local if theme_uploads_local.present?
|
|
|
|
hash
|
|
end
|
|
|
|
def update_setting(setting_name, new_value)
|
|
target_setting = settings.find { |setting| setting.name == setting_name }
|
|
raise Discourse::NotFound unless target_setting
|
|
|
|
target_setting.value = new_value
|
|
|
|
if target_setting.requests_refresh?
|
|
self.theme_setting_requests_refresh = true
|
|
end
|
|
end
|
|
|
|
def update_translation(translation_key, new_value)
|
|
target_translation = translations.find { |translation| translation.key == translation_key }
|
|
raise Discourse::NotFound unless target_translation
|
|
target_translation.value = new_value
|
|
end
|
|
|
|
def translation_override_hash
|
|
hash = {}
|
|
theme_translation_overrides.each do |override|
|
|
cursor = hash
|
|
path = [override.locale] + override.translation_key.split(".")
|
|
path[0..-2].each do |key|
|
|
cursor = (cursor[key] ||= {})
|
|
end
|
|
cursor[path[-1]] = override.value
|
|
end
|
|
hash
|
|
end
|
|
|
|
def generate_metadata_hash
|
|
{}.tap do |meta|
|
|
meta[:name] = name
|
|
meta[:component] = component
|
|
|
|
RemoteTheme::METADATA_PROPERTIES.each do |property|
|
|
meta[property] = remote_theme&.public_send(property)
|
|
meta[property] = nil if meta[property] == "URL" # Clean up old discourse_theme CLI placeholders
|
|
end
|
|
|
|
meta[:assets] = {}.tap do |hash|
|
|
theme_fields.where(type_id: ThemeField.types[:theme_upload_var]).each do |field|
|
|
hash[field.name] = field.file_path
|
|
end
|
|
end
|
|
|
|
meta[:color_schemes] = {}.tap do |hash|
|
|
schemes = self.color_schemes
|
|
# The selected color scheme may not belong to the theme, so include it anyway
|
|
schemes = [self.color_scheme] + schemes if self.color_scheme
|
|
schemes.uniq.each do |scheme|
|
|
hash[scheme.name] = {}.tap { |colors| scheme.colors.each { |color| colors[color.name] = color.hex } }
|
|
end
|
|
end
|
|
|
|
meta[:modifiers] = {}.tap do |hash|
|
|
ThemeModifierSet.modifiers.keys.each do |modifier|
|
|
value = self.theme_modifier_set.public_send(modifier)
|
|
hash[modifier] = value if !value.nil?
|
|
end
|
|
end
|
|
|
|
meta[:learn_more] = "https://meta.discourse.org/t/beginners-guide-to-using-discourse-themes/91966"
|
|
|
|
end
|
|
end
|
|
|
|
def disabled_by
|
|
find_disable_action_log&.acting_user
|
|
end
|
|
|
|
def disabled_at
|
|
find_disable_action_log&.created_at
|
|
end
|
|
|
|
def with_scss_load_paths
|
|
return yield([]) if self.extra_scss_fields.empty?
|
|
|
|
ThemeStore::ZipExporter.new(self).with_export_dir(extra_scss_only: true) do |dir|
|
|
yield ["#{dir}/stylesheets"]
|
|
end
|
|
end
|
|
|
|
def scss_variables
|
|
settings_hash = build_settings_hash
|
|
theme_variable_fields = var_theme_fields
|
|
|
|
return if theme_variable_fields.empty? && settings_hash.empty?
|
|
|
|
contents = +""
|
|
|
|
theme_variable_fields&.each do |field|
|
|
if field.type_id == ThemeField.types[:theme_upload_var]
|
|
if upload = field.upload
|
|
url = upload_cdn_path(upload.url)
|
|
contents << "$#{field.name}: unquote(\"#{url}\");"
|
|
end
|
|
else
|
|
contents << to_scss_variable(field.name, field.value)
|
|
end
|
|
end
|
|
|
|
settings_hash&.each do |name, value|
|
|
next if name == "theme_uploads" || name == "theme_uploads_local"
|
|
contents << to_scss_variable(name, value)
|
|
end
|
|
|
|
contents
|
|
end
|
|
|
|
def convert_settings
|
|
settings.each do |setting|
|
|
setting_row = ThemeSetting.where(theme_id: self.id, name: setting.name.to_s).first
|
|
|
|
if setting_row && setting_row.data_type != setting.type
|
|
if (setting_row.data_type == ThemeSetting.types[:list] &&
|
|
setting.type == ThemeSetting.types[:string] &&
|
|
setting.json_schema.present?)
|
|
convert_list_to_json_schema(setting_row, setting)
|
|
else
|
|
Rails.logger.warn("Theme setting type has changed but cannot be converted. \n\n #{setting.inspect}")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def convert_list_to_json_schema(setting_row, setting)
|
|
schema = setting.json_schema
|
|
return if !schema
|
|
keys = schema["items"]["properties"].keys
|
|
return if !keys
|
|
|
|
current_values = CSV.parse(setting_row.value, **{ col_sep: '|' }).flatten
|
|
new_values = []
|
|
current_values.each do |item|
|
|
parts = CSV.parse(item, **{ col_sep: ',' }).flatten
|
|
props = parts.map.with_index { |p, idx| [keys[idx], p] }.to_h
|
|
new_values << props
|
|
end
|
|
|
|
schemer = JSONSchemer.schema(schema)
|
|
raise "Schema validation failed" if !schemer.valid?(new_values)
|
|
|
|
setting_row.value = new_values.to_json
|
|
setting_row.data_type = setting.type
|
|
setting_row.save!
|
|
end
|
|
|
|
def baked_js_tests_with_digest
|
|
content = theme_fields
|
|
.where(target_id: Theme.targets[:tests_js])
|
|
.each(&:ensure_baked!)
|
|
.map(&:value_baked)
|
|
.join("\n")
|
|
|
|
return [nil, nil] if content.blank?
|
|
|
|
content = <<~JS + content
|
|
(function() {
|
|
require("discourse/lib/theme-settings-store").registerSettings(#{self.id}, #{cached_default_settings.to_json}, { force: true });
|
|
})();
|
|
JS
|
|
[content, Digest::SHA1.hexdigest(content)]
|
|
end
|
|
|
|
private
|
|
|
|
attr_accessor :theme_setting_requests_refresh
|
|
|
|
def to_scss_variable(name, value)
|
|
escaped = SassC::Script::Value::String.quote(value, sass: true)
|
|
"$#{name}: unquote(#{escaped});"
|
|
end
|
|
|
|
def find_disable_action_log
|
|
if component? && !enabled?
|
|
@disable_log ||= UserHistory.where(context: id.to_s, action: UserHistory.actions[:disable_theme_component]).order("created_at DESC").first
|
|
end
|
|
end
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: themes
|
|
#
|
|
# id :integer not null, primary key
|
|
# name :string not null
|
|
# user_id :integer not null
|
|
# created_at :datetime not null
|
|
# updated_at :datetime not null
|
|
# compiler_version :integer default(0), not null
|
|
# user_selectable :boolean default(FALSE), not null
|
|
# hidden :boolean default(FALSE), not null
|
|
# color_scheme_id :integer
|
|
# remote_theme_id :integer
|
|
# component :boolean default(FALSE), not null
|
|
# enabled :boolean default(TRUE), not null
|
|
# auto_update :boolean default(TRUE), not null
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_themes_on_remote_theme_id (remote_theme_id) UNIQUE
|
|
#
|