UX: sort admins and moderators by last seen date on /about page

UX: only show active admins and moderators on /about page

app/assets/javascripts/discourse/routes/about.js.es6

@@ -1,7 +1,23 @@
 import { ajax } from "discourse/lib/ajax";
 export default Discourse.Route.extend({
   model() {
-    return ajax("/about.json").then(result => result.about);
+    return ajax("/about.json").then(result => {
+      let activeAdmins = [];
+      let activeModerators = [];
+      const yearAgo = moment()
+        .locale("en")
+        .utc()
+        .subtract(1, "year");
+      result.about.admins.forEach(r => {
+        if (moment(r.last_seen_at) > yearAgo) activeAdmins.push(r);
+      });
+      result.about.moderators.forEach(r => {
+        if (moment(r.last_seen_at) > yearAgo) activeModerators.push(r);
+      });
+      result.about.admins = activeAdmins;
+      result.about.moderators = activeModerators;
+      return result.about;
+    });
   },
 
   titleToken() {

app/models/about.rb

@@ -36,11 +36,13 @@ class About
   def moderators
     @moderators ||= User.where(moderator: true, admin: false)
       .human_users
-      .order(:username_lower)
+      .order("last_seen_at DESC")
   end
 
   def admins
-    @admins ||= User.where(admin: true).human_users.order(:username_lower)
+    @admins ||= User.where(admin: true)
+      .human_users
+      .order("last_seen_at DESC")
   end
 
   def stats

app/serializers/about_serializer.rb

@@ -1,6 +1,11 @@
 class AboutSerializer < ApplicationSerializer
-  has_many :moderators, serializer: UserNameSerializer, embed: :objects
+
-  has_many :admins, serializer: UserNameSerializer, embed: :objects
+  class UserAboutSerializer < BasicUserSerializer
+    attributes :title, :last_seen_at
+  end
+
+  has_many :moderators, serializer: UserAboutSerializer, embed: :objects
+  has_many :admins, serializer: UserAboutSerializer, embed: :objects
 
   attributes :stats,
              :description,

test/javascripts/fixtures/about.js.es6

@@ -21,37 +21,43 @@ export default {
           id: 3,
           username: "supermathie",
           uploaded_avatar_id: 5247,
-          avatar_template: "/images/avatar.png"
+          avatar_template: "/images/avatar.png",
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 32,
           username: "codinghorror",
           uploaded_avatar_id: 5297,
-          avatar_template: "/images/avatar.png"
+          avatar_template: "/images/avatar.png",
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 19,
           username: "eviltrout",
           uploaded_avatar_id: 5275,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 2,
           username: "neil",
           uploaded_avatar_id: 5245,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 1,
           username: "sam",
           uploaded_avatar_id: 5243,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 1995,
           username: "zogstrip",
           uploaded_avatar_id: 8630,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         }
       ],
       admins: [
@@ -60,48 +66,56 @@ export default {
           username: "supermathie",
           uploaded_avatar_id: 5247,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 32,
           username: "codinghorror",
           uploaded_avatar_id: 5297,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 19,
           username: "eviltrout",
           uploaded_avatar_id: 5275,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 38,
           username: "frandallfarmer",
           uploaded_avatar_id: 5307,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 6626,
           username: "riking",
           uploaded_avatar_id: 9779,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 2,
           username: "neil",
           uploaded_avatar_id: 5245,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 1,
           username: "sam",
           uploaded_avatar_id: 5243,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         },
         {
           id: 1995,
           username: "zogstrip",
           uploaded_avatar_id: 8630,
           avatar_template: "/images/avatar.png"
+          last_seen_at: "2019-01-15T06:17:45.799Z"
         }
       ]
     }