FEATURE: Allow a user to upload an image for their expansion background.

app/controllers/users_controller.rb

@@ -461,6 +461,8 @@ class UsersController < ApplicationController
         upload_avatar_for(user, upload)
       when "profile_background"
         upload_profile_background_for(user.user_profile, upload)
+      when "expansion_background"
+        upload_expansion_background_for(user.user_profile, upload)
       end
     else
       render status: 422, text: upload.errors.full_messages
@@ -490,6 +492,8 @@ class UsersController < ApplicationController
     image_type = params.require(:image_type)
     if image_type == 'profile_background'
       user.user_profile.clear_profile_background
+    elsif image_type == 'expansion_background'
+      user.user_profile.clear_expansion_background
     else
       raise Discourse::InvalidParameters.new(:image_type)
     end
@@ -547,8 +551,11 @@ class UsersController < ApplicationController
 
     def upload_profile_background_for(user_profile, upload)
       user_profile.upload_profile_background(upload)
-      # TODO: add a resize job here
+      render json: { url: upload.url, width: upload.width, height: upload.height }
+    end
 
+    def upload_expansion_background_for(user_profile, upload)
+      user_profile.upload_expansion_background(upload)
       render json: { url: upload.url, width: upload.width, height: upload.height }
     end