FEATURE: First class messages to groups, you can select a group as a target of a message

app/controllers/posts_controller.rb

@@ -507,6 +507,14 @@ class PostsController < ApplicationController
     result[:user_agent] = request.user_agent
     result[:referrer] = request.env["HTTP_REFERER"]
 
+    if usernames = result[:target_usernames]
+      usernames = usernames.split(",")
+      groups = Group.mentionable(current_user).where('name in (?)', usernames).pluck('name')
+      usernames -= groups
+      result[:target_usernames] = usernames.join(",")
+      result[:target_group_names] = groups.join(",")
+    end
+
     result
   end
 

app/controllers/users_controller.rb

@@ -548,6 +548,14 @@ class UsersController < ApplicationController
       end
     end
 
+    if params[:include_mentionable_groups] == "true" && current_user
+      to_render[:groups] = Group.mentionable(current_user)
+                                .where("name ILIKE :term_like", term_like: "#{term}%")
+                                .map do |m|
+        {name: m.name, usernames: []}
+      end
+    end
+
     render json: to_render
   end