FIX: Posts with Staff Colors were excluded from the group activity

Now they are included, with the correct color applied.

app/assets/javascripts/discourse/app/components/group-post.js

@@ -1,10 +1,17 @@
 import Component from "@ember/component";
 import discourseComputed from "discourse-common/utils/decorators";
 import getURL from "discourse-common/lib/get-url";
+import { propertyEqual } from "discourse/lib/computed";
 
 export default Component.extend({
+  classNameBindings: [":user-stream-item", ":item", "moderatorAction"],
+
   @discourseComputed("post.url")
   postUrl(url) {
     return getURL(url);
   },
+  moderatorAction: propertyEqual(
+    "post.post_type",
+    "site.post_types.moderator_action"
+  ),
 });

app/assets/javascripts/discourse/app/templates/group-activity-posts.hbs

@@ -1,7 +1,7 @@
 {{#load-more selector=".user-stream-item" action=(action "loadMore")}}
   <div class="user-stream">
     {{#each model as |post|}}
-      {{group-post post=post class="user-stream-item item"}}
+      {{group-post post=post}}
     {{else}}
       <div>{{i18n emptyText}}</div>
     {{/each}}

app/models/group.rb

@@ -303,7 +303,7 @@ class Group < ActiveRecord::Base
       .where(groups: { id: id })
       .where('topics.archetype <> ?', Archetype.private_message)
       .where('topics.visible')
-      .where(post_type: Post.types[:regular])
+      .where(post_type: [Post.types[:regular], Post.types[:moderator_action]])
 
     if opts[:category_id].present?
       result = result.where('topics.category_id = ?', opts[:category_id].to_i)

app/serializers/group_post_serializer.rb

@@ -11,7 +11,8 @@ class GroupPostSerializer < ApplicationSerializer
              :url,
              :category_id,
              :post_number,
-             :topic_id
+             :topic_id,
+             :post_type
 
   has_one :user, serializer: GroupPostUserSerializer, embed: :object
   has_one :topic, serializer: BasicTopicSerializer, embed: :object

spec/requests/groups_controller_spec.rb

@@ -461,6 +461,15 @@ describe GroupsController do
       expect(response.status).to eq(200)
       expect(response.parsed_body.first["id"]).to eq(post.id)
     end
+
+    it "returns moderator actions" do
+      sign_in(user)
+      post = Fabricate(:post, user: user, post_type: Post.types[:moderator_action])
+      get "/groups/#{group.name}/posts.json"
+
+      expect(response.status).to eq(200)
+      expect(response.parsed_body.first["id"]).to eq(post.id)
+    end
   end
 
   describe "#members" do