Add error message when comments are disabled

assets/css/default.css

@@ -797,3 +797,7 @@ h1, h2, h3, h4, h5, p,
 #download_widget {
     width: 100%;
 }
+
+#comments-turned-off-on-video-message > p, #comments-disabled-message > p {
+  text-align: center;
+}

assets/js/comments.js

@@ -53,6 +53,10 @@ function show_youtube_replies(event) {
 }
 
 function get_youtube_comments() {
+    if (!video_data.comments_enabled) {
+        return;
+    };
+
     var comments = document.getElementById('comments');
 
     var fallback = comments.innerHTML;

assets/js/watch.js

@@ -186,8 +186,5 @@ addEventListener('load', function (e) {
         get_youtube_comments();
     } else if (video_data.params.comments[1] === 'reddit') {
         get_reddit_comments();
-    } else {
-        var comments = document.getElementById('comments');
-        comments.innerHTML = '';
     } 
 });

locales/en-US.json

@@ -213,6 +213,8 @@
     "View Reddit comments": "View Reddit comments",
     "Hide replies": "Hide replies",
     "Show replies": "Show replies",
+    "youtube_comments_disabled_text": "Comments are turned off on this video",
+    "invidious_comments_disabled_text": "Comments are hidden as per configuration",
     "Incorrect password": "Incorrect password",
     "Wrong answer": "Wrong answer",
     "Erroneous CAPTCHA": "Erroneous CAPTCHA",

src/invidious/videos.cr

@@ -272,6 +272,11 @@ struct Video
     }
   end
 
+  # Returns true if comments are enabled on the video
+  def comments?
+    return info["commentsEnabled"].as_bool
+  end
+
   # Macros defining getters/setters for various types of data
 
   private macro getset_string(name)

src/invidious/videos/parser.cr

@@ -378,6 +378,20 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
       .try &.as_s.split(" ", 2)[0]
   end
 
+  # Comments enabled?
+  comments_enabled = true
+
+  # When comments are enabled the primary results should contain either the comments-entry-point
+  # or comment-item-section section
+  if primary_results
+    section = primary_results.as_a.find { |s| s.dig?("itemSectionRenderer", "sectionIdentifier") == "comment-item-section" }
+
+    # messageRenderer should say "Comments are turned off."
+    if section && section.dig?("itemSectionRenderer", "contents", 0, "messageRenderer")
+      comments_enabled = false
+    end
+  end
+
   # Return data
 
   if live_now
@@ -422,6 +436,8 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
     "authorThumbnail" => JSON::Any.new(author_thumbnail.try &.as_s || ""),
     "authorVerified"  => JSON::Any.new(author_verified || false),
     "subCountText"    => JSON::Any.new(subs_text || "-"),
+
+    "commentsEnabled" => JSON::Any.new(comments_enabled),
   }
 
   return params

src/invidious/views/watch.ecr

@@ -63,6 +63,7 @@ we're going to need to do it here in order to allow for translations.
     "preferences" => preferences,
     "premiere_timestamp" => video.premiere_timestamp.try &.to_unix,
     "vr" => video.is_vr,
+    "comments_enabled" => video.comments?,
     "projection_type" => video.projection_type,
     "local_disabled" => CONFIG.disabled?("local"),
     "support_reddit" => true
@@ -289,6 +290,12 @@ we're going to need to do it here in order to allow for translations.
 
             <% end %>
             <div id="comments" class="comments">
+                <% if (params.comments <=> ["", ""]) == 0 %>
+                    <div id="comments-disabled-message" class="h-box v-box">
+                        <p><b><%=translate(locale, "invidious_comments_disabled_text")%></b></p>
+                    </div>
+                <% else %>
+                    <% if video.comments? %>
                         <% if nojs %>
                             <%= comment_html %>
                         <% else %>
@@ -298,6 +305,12 @@ we're going to need to do it here in order to allow for translations.
                                 </a>
                             </noscript>
                         <% end %>
+                    <% else %>
+                        <div id="comments-turned-off-on-video-message" class="h-box v-box">
+                            <p><b><%=translate(locale, "youtube_comments_disabled_text")%></b></p>
+                        </div>
+                    <% end %>
+                <% end %>
             </div>
         </div>
     </div>