Add option to view only notifications

src/invidious.cr

@@ -1769,6 +1769,10 @@ post "/preferences" do |env|
     unseen_only ||= "off"
     unseen_only = unseen_only == "on"
 
+    notifications_only = env.params.body["notifications_only"]?.try &.as(String)
+    notifications_only ||= "off"
+    notifications_only = notifications_only == "on"
+
     preferences = {
       "video_loop"         => video_loop,
       "autoplay"           => autoplay,
@@ -1783,6 +1787,7 @@ post "/preferences" do |env|
       "sort"               => sort,
       "latest_only"        => latest_only,
       "unseen_only"        => unseen_only,
+      "notifications_only" => notifications_only,
     }.to_json
 
     PG_DB.exec("UPDATE users SET preferences = $1 WHERE email = $2", preferences, user.email)
@@ -1823,6 +1828,28 @@ get "/feed/subscriptions" do |env|
       offset = (page - 1) * max_results
     end
 
+    notifications = PG_DB.query_one("SELECT notifications FROM users WHERE email = $1", user.email,
+      as: Array(String))
+    if preferences.notifications_only && !notifications.empty?
+      args = arg_array(notifications)
+
+      videos = PG_DB.query_all("SELECT * FROM channel_videos WHERE id IN (#{args})
+      ORDER BY published DESC", notifications, as: ChannelVideo)
+      notifications = [] of ChannelVideo
+
+      videos.sort_by! { |video| video.published }.reverse!
+
+      case preferences.sort
+      when "alphabetically"
+        videos.sort_by! { |video| video.title }
+      when "alphabetically - reverse"
+        videos.sort_by! { |video| video.title }.reverse!
+      when "channel name"
+        videos.sort_by! { |video| video.author }
+      when "channel name - reverse"
+        videos.sort_by! { |video| video.author }.reverse!
+      end
+    else
       if preferences.latest_only
         if preferences.unseen_only
           ucids = arg_array(user.subscriptions)
@@ -1878,6 +1905,7 @@ get "/feed/subscriptions" do |env|
 
       notifications = videos.select { |v| notifications.includes? v.id }
       videos = videos - notifications
+    end
 
     if !limit
       videos = videos[0..max_results]

src/invidious/helpers.cr

@@ -180,6 +180,11 @@ class Preferences
     sort:               String,
     latest_only:        Bool,
     unseen_only:        Bool,
+    notifications_only: {
+      type:    Bool,
+      nilable: true,
+      default: false,
+    },
   })
 end
 

src/invidious/views/preferences.ecr

@@ -97,6 +97,11 @@ function update_value(element) {
                 <input name="unseen_only" id="unseen_only" type="checkbox" <% if user.preferences.unseen_only %>checked<% end %>>
             </div>
 
+            <div class="pure-control-group">
+                <label for="notifications_only">Only show notifications: </label>
+                <input name="notifications_only" id="notifications_only" type="checkbox" <% if user.preferences.notifications_only %>checked<% end %>>
+            </div>
+
             <legend>Data preferences</legend>
             <div class="pure-control-group">
                 <label>