FEATURE: show added date when looking at group members

app/assets/javascripts/discourse/templates/group-index.hbs

@@ -25,6 +25,7 @@
       <thead>
         {{group-index-toggle order=order desc=desc field='username_lower' i18nKey='username'}}
         <th class='group-owner'>{{i18n "groups.members.owner"}}</th>
+        {{group-index-toggle order=order desc=desc field='added_at' i18nKey='groups.member_added'}}
         {{group-index-toggle order=order desc=desc field='last_posted_at' i18nKey='last_post'}}
         {{group-index-toggle order=order desc=desc field='last_seen_at'  i18nKey='last_seen'}}
         <th></th>
@@ -44,7 +45,9 @@
                 </strong>
               {{/if}}
             </td>
-
+            <td>
+              <span class="text">{{bound-date m.added_at}}</span>
+            </td>
             <td>
               <span class="text">{{bound-date m.last_posted_at}}</span>
             </td>

app/controllers/groups_controller.rb

@@ -216,6 +216,8 @@ class GroupsController < ApplicationController
 
     if params[:order] && %w{last_posted_at last_seen_at}.include?(params[:order])
       order = "#{params[:order]} #{dir} NULLS LAST"
+    elsif params[:order] == 'added_at'
+      order = "group_users.created_at #{dir}"
     end
 
     users = group.users.human_users
@@ -231,6 +233,8 @@ class GroupsController < ApplicationController
       end
     end
 
+    users = users.select('users.*, group_users.created_at as added_at')
+
     members = users
       .order('NOT group_users.owner')
       .order(order)

app/serializers/group_user_serializer.rb

@@ -1,3 +1,7 @@
 class GroupUserSerializer < BasicUserSerializer
-  attributes :name, :title, :last_posted_at, :last_seen_at
+  attributes :name, :title, :last_posted_at, :last_seen_at, :added_at
+
+  def include_added_at
+    object.respond_to? :added_at
+  end
 end

config/locales/client.en.yml

@@ -413,6 +413,7 @@ en:
         remove_user_as_group_owner: "Revoke owner"
 
     groups:
+      member_added: "Added"
       add_members:
         title: "Add Members"
         description: "Manage the membership of this group"

spec/requests/groups_controller_spec.rb

@@ -360,7 +360,15 @@ describe GroupsController do
     end
 
     it "ensures that membership can be paginated" do
-      5.times { group.add(Fabricate(:user)) }
+
+      freeze_time
+
+      first_user = Fabricate(:user)
+      group.add(first_user)
+
+      freeze_time 1.day.from_now
+
+      4.times { group.add(Fabricate(:user)) }
       usernames = group.users.map { |m| m.username }.sort
 
       get "/groups/#{group.name}/members.json", params: { limit: 3 }
@@ -378,6 +386,11 @@ describe GroupsController do
       members = JSON.parse(response.body)["members"]
 
       expect(members.map { |m| m['username'] }).to eq(usernames[3..5])
+
+      get "/groups/#{group.name}/members.json", params: { order: 'added_at', desc: true }
+      members = JSON.parse(response.body)["members"]
+
+      expect(members.last['added_at']).to eq(first_user.created_at.as_json)
     end
   end