FEATURE: Show the posts count on the groups page. It seems a bit odd

that it uses a new AJAX call, but I wanted to keep the count separate
from the group object itself.

app/assets/javascripts/discourse/controllers/group_controller.js

@@ -7,6 +7,7 @@
   @module Discourse
 **/
 Discourse.GroupController = Discourse.ObjectController.extend({
+  postsCount: null,
 
   // It would be nice if bootstrap marked action lists as selected when their links
   // were 'active' not the `li` tags.

app/assets/javascripts/discourse/models/group.js

@@ -154,6 +154,12 @@ Discourse.Group.reopenClass({
     });
   },
 
+  findPostsCount: function(name) {
+    return Discourse.ajax("/groups/" + name + "/posts_count.json").then(function(g) {
+      return g.posts_count;
+    });
+  },
+
   find: function(name) {
     return Discourse.ajax("/groups/" + name + ".json").then(function(g) {
       return Discourse.Group.create(g.basic_group);

app/assets/javascripts/discourse/routes/group_route.js

@@ -12,4 +12,17 @@ Discourse.GroupRoute = Discourse.Route.extend({
     return Discourse.Group.find(params.name);
   },
 
+  afterModel: function(model) {
+    var self = this;
+    return Discourse.Group.findPostsCount(model.get('name')).then(function (c) {
+      self.set('postsCount', c);
+    });
+  },
+
+  setupController: function(controller, model) {
+    controller.setProperties({
+      model: model,
+      postsCount: this.get('postsCount')
+    });
+  }
 });

app/assets/javascripts/discourse/templates/group.js.handlebars

@@ -1,8 +1,15 @@
 <div class="container">
     <section class='user-navigation'>
       <ul class='action-list nav-stacked'>
-        <li {{bind-attr class="showingIndex:active"}}>{{#link-to 'group.index' model}}{{i18n groups.posts}}{{/link-to}}</li>
+        <li {{bind-attr class="showingIndex:active"}}>
-        <li {{bind-attr class="showingMembers:active"}}>{{#link-to 'group.members' model}}{{i18n groups.members}}{{/link-to}}</li>
+          {{#link-to 'group.index' model}}{{i18n groups.posts}}
+          <span class='count'>({{postsCount}})</span>
+          <span class='fa fa-chevron-right'></span>{{/link-to}}
+        </li>
+      <li {{bind-attr class="showingMembers:active"}}>
+        {{#link-to 'group.members' model}}{{i18n groups.members}}
+        <span class='fa fa-chevron-right'></span>{{/link-to}}
+      </li>
     </ul>
   </section>
 

app/controllers/groups_controller.rb

@@ -6,10 +6,16 @@ class GroupsController < ApplicationController
     render_serialized(group, BasicGroupSerializer)
   end
 
+  def posts_count
+    group = Group.where(name: params.require(:group_id)).first
+    guardian.ensure_can_see!(group)
+    render json: {posts_count: group.posts_for(guardian).count}
+  end
+
   def posts
     group = Group.where(name: params.require(:group_id)).first
     guardian.ensure_can_see!(group)
-    posts = group.posts_for(guardian, params[:before_post_id])
+    posts = group.posts_for(guardian, params[:before_post_id]).limit(20)
     render_serialized posts.to_a, GroupPostSerializer
   end
 

app/models/group.rb

@@ -31,7 +31,7 @@ class Group < ActiveRecord::Base
 
   validate :alias_level, inclusion: { in: ALIAS_LEVELS.values}
 
-  def posts_for(guardian, before_post_id)
+  def posts_for(guardian, before_post_id=nil)
     user_ids = group_users.map {|gu| gu.user_id}
     result = Post.where(user_id: user_ids).includes(:user, :topic).references(:posts, :topics)
     result = result.where('topics.archetype <> ?', Archetype.private_message)
@@ -46,7 +46,7 @@ class Group < ActiveRecord::Base
     end
 
     result = result.where('posts.id < ?', before_post_id) if before_post_id
-    result.order('posts.created_at desc').limit(20)
+    result.order('posts.created_at desc')
   end
 
   def self.trust_group_ids

config/routes.rb

@@ -167,6 +167,7 @@ Discourse::Application.routes.draw do
   resources :groups do
     get 'members'
     get 'posts'
+    get 'posts_count'
   end
 
   resources :posts do

spec/controllers/groups_controller_spec.rb

@@ -18,6 +18,21 @@ describe GroupsController do
     end
   end
 
+  describe "posts_count" do
+    it "ensures the group can be seen" do
+      Guardian.any_instance.expects(:can_see?).with(group).returns(false)
+      xhr :get, :posts_count, group_id: group.name
+      response.should_not be_success
+    end
+
+    it "performs the query and responds with JSON" do
+      Guardian.any_instance.expects(:can_see?).with(group).returns(true)
+      Group.any_instance.expects(:posts_for).returns(Group.none)
+      xhr :get, :posts_count, group_id: group.name
+      response.should be_success
+    end
+  end
+
   describe "posts" do
     it "ensures the group can be seen" do
       Guardian.any_instance.expects(:can_see?).with(group).returns(false)
@@ -27,7 +42,7 @@ describe GroupsController do
 
     it "calls `posts_for` and responds with JSON" do
       Guardian.any_instance.expects(:can_see?).with(group).returns(true)
-      Group.any_instance.expects(:posts_for).returns([])
+      Group.any_instance.expects(:posts_for).returns(Group.none)
       xhr :get, :posts, group_id: group.name
       response.should be_success
     end