FEATURE - allow Group Moderators to edit category description (#10292)

Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>

app/models/post.rb

@@ -485,6 +485,10 @@ class Post < ActiveRecord::Base
       post_number == 1
   end
 
+  def is_category_description?
+    topic.present? && topic.is_category_topic? && is_first_post?
+  end
+
   def is_reply_by_email?
     via_email && post_number.present? && post_number > 1
   end

lib/guardian/category_guardian.rb

@@ -54,6 +54,10 @@ module CategoryGuardian
     secure_category_ids.include?(category.id)
   end
 
+  def can_edit_category_description?(category)
+    can_perform_action_available_to_group_moderators?(category.topic)
+  end
+
   def secure_category_ids
     @secure_category_ids ||= @user.secure_category_ids
   end

lib/guardian/post_guardian.rb

@@ -161,6 +161,10 @@ module PostGuardian
       return !post.edit_time_limit_expired?(@user)
     end
 
+    if post.is_category_description?
+      return true if can_edit_category_description?(post.topic.category)
+    end
+
     false
   end
 

lib/post_revisor.rb

@@ -192,8 +192,13 @@ class PostRevisor
       PostLocker.new(@post, @editor).lock
     end
 
-    # We log staff edits to posts
+    # We log staff/group moderator edits to posts
-    if @editor.staff? && @editor.id != @post.user_id && @fields.has_key?('raw') && !@opts[:skip_staff_log]
+    if (
+      (@editor.staff? || (@post.is_category_description? && Guardian.new(@editor).can_edit_category_description?(@post.topic.category))) &&
+      @editor.id != @post.user_id &&
+      @fields.has_key?('raw') &&
+      !@opts[:skip_staff_log]
+    )
       StaffActionLogger.new(@editor).log_post_edit(
         @post,
         old_raw: old_raw

spec/components/post_revisor_spec.rb

@@ -598,6 +598,28 @@ describe PostRevisor do
       end
     end
 
+    context "logging group moderator edits" do
+      fab!(:group_user) { Fabricate(:group_user) }
+      fab!(:category) { Fabricate(:category, reviewable_by_group_id: group_user.group.id, topic: topic) }
+
+      before do
+        SiteSetting.enable_category_group_moderation = true
+        topic.update!(category: category)
+        post.update!(topic: topic)
+      end
+
+      it "logs an edit when a group moderator revises the category description" do
+        PostRevisor.new(post).revise!(group_user.user, raw: "a group moderator can update the description")
+
+        log = UserHistory.where(
+          acting_user_id: group_user.user.id,
+          action: UserHistory.actions[:post_edit]
+        ).first
+        expect(log).to be_present
+        expect(log.details).to eq("Hello world\n\n---\n\na group moderator can update the description")
+      end
+    end
+
     context "staff_edit_locks_post" do
 
       context "disabled" do

spec/requests/posts_controller_spec.rb

@@ -426,6 +426,53 @@ describe PostsController do
       end
     end
 
+    describe "when logged in as group moderator" do
+      fab!(:topic) { Fabricate(:topic, category: category) }
+      fab!(:post) { Fabricate(:post, user: user, topic: topic) }
+      fab!(:group_user) { Fabricate(:group_user) }
+      let(:user_gm) { group_user.user }
+      let(:group) { group_user.group }
+
+      before do
+        SiteSetting.enable_category_group_moderation = true
+        post.topic.category.update!(reviewable_by_group_id: group.id, topic_id: topic.id)
+        sign_in(user_gm)
+      end
+
+      it "allows updating the category description" do
+        put "/posts/#{post.id}.json", params: update_params
+        expect(response.status).to eq(200)
+
+        post.reload
+        expect(post.raw).to eq('edited body')
+        expect(UserHistory.where(action: UserHistory.actions[:post_edit]).count).to eq(1)
+      end
+
+      it "can not update other posts within the primary category topic" do
+        second_post = Fabricate(:post, user: user, topic: topic)
+
+        put "/posts/#{second_post.id}.json", params: update_params
+        expect(response.status).to eq(403)
+      end
+
+      it "can not update other first posts of topics in the same category" do
+        second_topic_in_category = Fabricate(:topic, category: category)
+        post_in_second_topic = Fabricate(:post, user: user, topic: second_topic_in_category)
+
+        put "/posts/#{post_in_second_topic.id}.json", params: update_params
+        expect(response.status).to eq(403)
+      end
+
+      it "can not update category descriptions in other categories" do
+        second_category = Fabricate(:category)
+        topic.update!(category: second_category)
+
+        put "/posts/#{post.id}.json", params: update_params
+        expect(response.status).to eq(403)
+      end
+
+    end
+
     it 'can not change category to a disallowed category' do
       post = create_post
       sign_in(post.user)

spec/services/staff_action_logger_spec.rb

@@ -595,4 +595,26 @@ describe StaffActionLogger do
     end
   end
 
+  describe 'log_post_staff_note' do
+    fab!(:post) { Fabricate(:post) }
+
+    it "raises an error when argument is missing" do
+      expect { logger.log_topic_archived(nil) }.to raise_error(Discourse::InvalidParameters)
+    end
+
+    it "creates a new UserHistory record" do
+      expect { logger.log_post_staff_note(post, { new_raw_value: 'my note', old_value: nil }) }.to change { UserHistory.count }.by(1)
+      user_history = UserHistory.last
+      expect(user_history.action).to eq(UserHistory.actions[:post_staff_note_create])
+      expect(user_history.new_value).to eq('my note')
+      expect(user_history.previous_value).to eq(nil)
+
+      expect { logger.log_post_staff_note(post, { new_raw_value: nil, old_value: 'my note' }) }.to change { UserHistory.count }.by(1)
+      user_history = UserHistory.last
+      expect(user_history.action).to eq(UserHistory.actions[:post_staff_note_destroy])
+      expect(user_history.new_value).to eq(nil)
+      expect(user_history.previous_value).to eq('my note')
+    end
+  end
+
 end

test/javascripts/acceptance/post-admin-menu-test.js

@@ -7,6 +7,7 @@ QUnit.test("Enter as a anon user", async assert => {
   await click(".show-more-actions");
 
   assert.ok(exists("#topic"), "The topic was rendered");
+  assert.ok(exists("#post_1 .post-controls .edit"), "The edit button was not rendered");
   assert.ok(!exists(".show-post-admin-menu"), "The wrench button was not rendered");
 });
 
@@ -17,5 +18,6 @@ QUnit.test("Enter as a user with group moderator permissions", async assert => {
   await click(".show-more-actions");
   await click(".show-post-admin-menu");
 
+  assert.ok(exists("#post_1 .post-controls .edit"), "The edit button was rendered");
   assert.ok(exists(".add-notice"), "The add notice button was rendered");
 });