Add error message when comments are disabled

assets/css/default.css

@@ -418,7 +418,7 @@ p.channel-name { margin: 0; overflow-wrap: anywhere;}
 p.video-data   { margin: 0; font-weight: bold; font-size: 80%; }
 
 .channel-profile > .channel-name,
-.channel-profile > .channel-name-pronouns >  .channel-name 
+.channel-profile > .channel-name-pronouns >  .channel-name
 {
   overflow-wrap: anywhere;
 }
@@ -909,4 +909,8 @@ h1, h2, h3, h4, h5, p,
   padding-left: 10px;
   display: inline-block;
   vertical-align: top;
-}
+}
+
+#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

@@ -190,8 +190,5 @@ 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

@@ -222,6 +222,8 @@
     "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

@@ -193,6 +193,11 @@ 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

@@ -295,6 +295,20 @@ module Invidious::Videos::Parser
           "likeButton", "toggleButtonRenderer"
         )
 
+      # 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
+
       if likes_button
         likes_txt = likes_button.dig?("accessibilityText")
         # Note: The like count from `toggledText` is off by one, as it would
@@ -441,6 +455,7 @@ module Invidious::Videos::Parser
       "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.vr?,
+    "comments_enabled" => video.comments?,
     "projection_type" => video.projection_type,
     "local_disabled" => CONFIG.disabled?("local"),
     "support_reddit" => true,
@@ -289,14 +290,26 @@ we're going to need to do it here in order to allow for translations.
 
             <% end %>
             <div id="comments" class="comments">
-                <% if nojs %>
-                    <%= comment_html %>
+                <% if (params.comments <=> ["", ""]) == 0 %>
+                    <div id="comments-disabled-message" class="h-box v-box">
+                        <p><b><%= I18n.translate(locale, "invidious_comments_disabled_text") %></b></p>
+                    </div>
                 <% else %>
-                    <noscript>
-                        <a href="/watch?<%= env.params.query %>&nojs=1">
-                            <%= I18n.translate(locale, "Hi! Looks like you have JavaScript turned off. Click here to view comments, keep in mind they may take a bit longer to load.") %>
-                        </a>
-                    </noscript>
+                    <% if video.comments? %>
+                        <% if nojs %>
+                            <%= comment_html %>
+                        <% else %>
+                            <noscript>
+                                <a href="/watch?<%= env.params.query %>&nojs=1">
+                                    <%= I18n.translate(locale, "Hi! Looks like you have JavaScript turned off. Click here to view comments, keep in mind they may take a bit longer to load.") %>
+                                </a>
+                            </noscript>
+                        <% end %>
+                    <% else %>
+                        <div id="comments-turned-off-on-video-message" class="h-box v-box">
+                            <p><b><%= I18n.translate(locale, "youtube_comments_disabled_text") %></b></p>
+                        </div>
+                    <% end %>
                 <% end %>
             </div>
         </div>