FIX: Various bugs from 2024 rewind (#29)

* Use post excerpt for best posts to avoid giant posts
  ruining it
* Make sure short emojis (e.g. `😂`) render in best posts
  and best topics
* Make images show in best post excerpts (requires core change)
* Fix invite action error, using column that doesn't exist
* Add missing # for top category slugs
* Refactor report service + controller a little to make it easier
  to figure out what went wrong if it fails, and to use the guardian
  user

Copies a couple of fixes from
https://github.com/discourse/discourse-rewind/pull/28 to make
things work locally, the conflicts will be easy to resolve.

**Best topics before**

<img width="977" height="712" alt="image"
src="https://github.com/user-attachments/assets/e120507f-d0d8-44f0-b242-e1056084ef03"
/>


**Best topics after**

<img width="969" height="648" alt="image"
src="https://github.com/user-attachments/assets/dd13f6ac-35df-4e9a-907e-9ed5102843b6"
/>

**Categories before**

<img width="904" height="465" alt="image"
src="https://github.com/user-attachments/assets/0d15e73d-3534-4836-b776-2c97381e58ef"
/>


**Categories after**

<img width="925" height="466" alt="image"
src="https://github.com/user-attachments/assets/3d6e4eae-32ed-4f11-a4f4-090e4473ebe9"
/>

app/controllers/discourse_rewind/rewinds_controller.rb

@@ -8,8 +8,12 @@ module ::DiscourseRewind
 
     def show
       DiscourseRewind::FetchReports.call(service_params) do
-        on_model_not_found(:year) { raise Discourse::NotFound }
-        on_model_not_found(:user) { raise Discourse::NotFound }
+        on_model_not_found(:year) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.invalid_year")
+        end
+        on_model_not_found(:reports) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.report_failed")
+        end
         on_success { |reports:| render json: MultiJson.dump(reports), status: :ok }
       end
     end

app/services/discourse_rewind/action/best_posts.rb

@@ -10,9 +10,19 @@ module DiscourseRewind
             .where(created_at: date)
             .where(deleted_at: nil)
             .where("post_number > 1")
-            .order("like_count DESC NULLS LAST")
+            .order("like_count DESC NULLS LAST, created_at ASC")
             .limit(3)
-            .pluck(:post_number, :topic_id, :like_count, :reply_count, :raw, :cooked)
+            .select(:post_number, :topic_id, :like_count, :reply_count, :raw, :cooked)
+            .map do |post|
+              {
+                post_number: post.post_number,
+                topic_id: post.topic_id,
+                like_count: post.like_count,
+                reply_count: post.reply_count,
+                excerpt:
+                  post.excerpt(200, { strip_links: true, remap_emoji: true, keep_images: true }),
+              }
+            end
 
         { data: best_posts, identifier: "best-posts" }
       end

app/services/discourse_rewind/fetch_reports.rb

@@ -41,16 +41,11 @@ module DiscourseRewind
     ]
 
     model :year
-    model :user
     model :date
     model :reports
 
     private
 
-    def fetch_user(guardian:)
-      User.find_by_username(guardian.user.username)
-    end
-
     def fetch_year
       current_date = Time.zone.now
       current_month = current_date.month
@@ -76,12 +71,13 @@ module DiscourseRewind
       Date.new(year).all_year
     end
 
-    def fetch_reports(date:, user:, guardian:, year:)
+    def fetch_reports(date:, guardian:, year:)
       key = "rewind:#{guardian.user.username}:#{year}"
       reports = Discourse.redis.get(key)
 
       if !reports
-        reports = REPORTS.map { |report| report.call(date:, user:, guardian:) }.compact
+        reports =
+          REPORTS.map { |report| report.call(date:, user: guardian.user, guardian:) }.compact
         Discourse.redis.setex(key, CACHE_DURATION, MultiJson.dump(reports))
       else
         reports = MultiJson.load(reports, symbolize_keys: true)

assets/javascripts/discourse/components/reports/best-posts.gjs

@@ -1,6 +1,5 @@
 import Component from "@glimmer/component";
 import { concat } from "@ember/helper";
-import { get } from "@ember/object";
 import { htmlSafe } from "@ember/template";
 import icon from "discourse/helpers/d-icon";
 import { i18n } from "discourse-i18n";
@@ -22,13 +21,15 @@ export default class BestPosts extends Component {
             <div class={{concat "rewind-card" " rank-" (this.rank idx)}}>
               <span class="best-posts -rank"></span>
               <span class="best-posts -rank"></span>
-              <div class="best-posts__post">{{htmlSafe (get post "5")}}</div>
+              <div class="best-posts__post"><p>{{htmlSafe
+                    post.excerpt
+                  }}</p></div>
               <div class="best-posts__metadata">
                 <span class="best-posts__likes">
-                  {{icon "heart"}}{{htmlSafe (get post "2")}}</span>
+                  {{icon "heart"}}{{post.like_count}}</span>
                 <span class="best-posts__replies">
-                  {{icon "comment"}}{{htmlSafe (get post "3")}}</span>
-                <a href="/t/{{get post '1'}}/{{get post '0'}}">{{i18n
+                  {{icon "comment"}}{{post.reply_count}}</span>
+                <a href="/t/{{post.topic_id}}/{{post.post_number}}">{{i18n
                     "discourse_rewind.reports.best_posts.view_post"
                   }}</a>
               </div>

assets/javascripts/discourse/components/reports/best-topics.gjs

@@ -1,6 +1,7 @@
 import Component from "@glimmer/component";
 import { concat } from "@ember/helper";
 import { htmlSafe } from "@ember/template";
+import replaceEmoji from "discourse/helpers/replace-emoji";
 import { i18n } from "discourse-i18n";
 
 export default class BestTopics extends Component {
@@ -25,8 +26,8 @@ export default class BestTopics extends Component {
                 <span class="best-topics -rank"></span>
                 <span class="best-topics -rank"></span>
                 <h2 class="best-topics__header">{{topic.title}}</h2>
-                <span class="best-topics__excerpt">{{htmlSafe
-                    topic.excerpt
+                <span class="best-topics__excerpt">{{replaceEmoji
+                    (htmlSafe topic.excerpt)
                   }}</span>
               </a>
             {{/each}}

assets/javascripts/discourse/components/reports/most-viewed-categories.gjs

@@ -13,7 +13,7 @@ const MostViewedCategories = <template>
           <a class="folder-wrapper" href={{concat "/c/-/" data.category_id}}>
             <span class="folder-tab"></span>
             <div class="rewind-card">
-              <p class="most-viewed-categories__category">{{data.name}}</p>
+              <p class="most-viewed-categories__category">#{{data.name}}</p>
             </div>
             <span class="folder-bg"></span>
           </a>

config/locales/server.en.yml

@@ -1,3 +1,6 @@
 en:
   site_settings:
     discourse_rewind_enabled: "Enable Discourse Rewind for a fun end-of-year summary for members' activity in the community."
+  discourse_rewind:
+    report_failed: "Failed to generate Discourse Rewind report."
+    invalid_year: "Rewind can only be generated in January or December."

spec/requests/rewinds_controller_spec.rb

@@ -15,6 +15,7 @@ RSpec.describe DiscourseRewind::RewindsController do
         get "/rewinds.json"
 
         expect(response.status).to eq(404)
+        expect(response.parsed_body["errors"].first).to eq(I18n.t("discourse_rewind.invalid_year"))
       end
     end
 
@@ -26,6 +27,21 @@ RSpec.describe DiscourseRewind::RewindsController do
 
         expect(response.status).to eq(200)
       end
+
+      context "when reports are not found or error" do
+        before do
+          DiscourseRewind::Action::TopWords.stubs(:call).raises(StandardError.new("Some error"))
+        end
+
+        it "returns 404 with message" do
+          get "/rewinds.json"
+
+          expect(response.status).to eq(404)
+          expect(response.parsed_body["errors"].first).to eq(
+            I18n.t("discourse_rewind.report_failed"),
+          )
+        end
+      end
     end
   end
 end