Add support for default channel banners

src/invidious.cr

@@ -3565,6 +3565,7 @@ get "/api/v1/channels/:ucid" do |env|
 
       json.field "authorBanners" do
         json.array do
+          if channel.banner
             qualities = {
               {width: 2560, height: 424},
               {width: 2120, height: 351},
@@ -3572,19 +3573,20 @@ get "/api/v1/channels/:ucid" do |env|
             }
             qualities.each do |quality|
               json.object do
-              json.field "url", channel.banner.gsub("=w1060", "=w#{quality[:width]}")
+                json.field "url", channel.banner.not_nil!.gsub("=w1060", "=w#{quality[:width]}")
                 json.field "width", quality[:width]
                 json.field "height", quality[:height]
               end
             end
 
             json.object do
-            json.field "url", channel.banner.rchop("=w1060-fcrop64=1,00005a57ffffa5a8-nd-c0xffffffff-rj-k-no")
+              json.field "url", channel.banner.not_nil!.rchop("=w1060-fcrop64=1,00005a57ffffa5a8-nd-c0xffffffff-rj-k-no")
               json.field "width", 512
               json.field "height", 288
             end
           end
         end
+      end
 
       json.field "authorThumbnails" do
         json.array do
@@ -3592,7 +3594,7 @@ get "/api/v1/channels/:ucid" do |env|
 
           qualities.each do |quality|
             json.object do
-              json.field "url", channel.author_thumbnail.gsub("/s100-", "/s#{quality}-")
+              json.field "url", channel.author_thumbnail.gsub("=s100-", "=s#{quality}-")
               json.field "width", quality
               json.field "height", quality
             end

src/invidious/channels.cr

@@ -114,7 +114,7 @@ struct AboutChannel
     auto_generated:     Bool,
     author_url:         String,
     author_thumbnail:   String,
-    banner:             String,
+    banner:             String?,
     description_html:   String,
     paid:               Bool,
     total_views:        Int64,
@@ -654,6 +654,10 @@ def get_about_info(ucid, locale)
   banner = about.xpath_node(%q(//div[@id="gh-banner"]/style)).not_nil!.content
   banner = "https:" + banner.match(/background-image: url\((?<url>[^)]+)\)/).not_nil!["url"]
 
+  if banner.includes? "channels/c4/default_banner"
+    banner = nil
+  end
+
   description_html = about.xpath_node(%q(//div[contains(@class,"about-description")])).try &.to_s || ""
 
   paid = about.xpath_node(%q(//meta[@itemprop="paid"])).not_nil!["content"] == "True"

src/invidious/views/channel.ecr

@@ -3,13 +3,15 @@
 <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/channel/<%= channel.ucid %>" />
 <% end %>
 
-<div class="h-box">
-    <img style="width:100%" src="/ggpht<%= URI.parse(channel.banner.gsub("=w1060", "=w1280")).full_path %>">
-</div>
+<% if channel.banner %>
+    <div class="h-box">
+        <img style="width:100%" src="/ggpht<%= URI.parse(channel.banner.not_nil!.gsub("=w1060", "=w1280")).full_path %>">
+    </div>
 
-<div class="h-box">
+    <div class="h-box">
         <hr>
-</div>
+    </div>
+<% end %>
 
 <div class="pure-g h-box">
     <div class="pure-u-2-3">

src/invidious/views/playlists.ecr

@@ -2,13 +2,15 @@
 <title><%= channel.author %> - Invidious</title>
 <% end %>
 
-<div class="h-box">
-    <img style="width:100%" src="/ggpht<%= URI.parse(channel.banner.gsub("=w1060", "=w1280")).full_path %>">
-</div>
+<% if channel.banner %>
+    <div class="h-box">
+        <img style="width:100%" src="/ggpht<%= URI.parse(channel.banner.not_nil!.gsub("=w1060", "=w1280")).full_path %>">
+    </div>
 
-<div class="h-box">
+    <div class="h-box">
         <hr>
-</div>
+    </div>
+<% end %>
 
 <div class="pure-g h-box">
     <div class="pure-u-2-3">