Add instance redirect on empty/broken search

locales/en-US.json

@@ -162,6 +162,7 @@
     "Show less": "Show less",
     "Watch on YouTube": "Watch on YouTube",
     "Switch Invidious Instance": "Switch Invidious Instance",
+    "Broken?": "Broken?",
     "Hide annotations": "Hide annotations",
     "Show annotations": "Show annotations",
     "Genre: ": "Genre: ",

src/invidious/helpers/utils.cr

@@ -410,7 +410,7 @@ def convert_theme(theme)
   end
 end
 
-def fetch_random_instance()
+def fetch_random_instance
   instance_list = HTTP::Client.get "https://api.invidious.io/instances.json"
   instance_list = JSON.parse(instance_list.body)
 

src/invidious/routes/misc.cr

@@ -37,8 +37,13 @@ class Invidious::Routes::Misc < Invidious::Routes::BaseRoute
   end
 
   def cross_instance_redirect(env)
-      id = env.params.query["id"]
     instance_url = fetch_random_instance
+    if env.params.query["id"]?
+      id = env.params.query["id"]
       env.redirect "https://#{instance_url}/watch?v=#{id}"
+    elsif env.params.query["q"]?
+      query, page = env.params.query["q"], env.params.query["page"]
+      env.redirect "https://#{instance_url}/search?q=#{query}&page=#{page}"
+    end
   end
 end

src/invidious/views/search.ecr

@@ -2,7 +2,13 @@
 <title><%= search_query.not_nil!.size > 30 ? HTML.escape(query.not_nil![0,30].rstrip(".") + "...") : HTML.escape(query.not_nil!) %> - Invidious</title>
 <% end %>
 
-<details id="filters">
+<!-- Search redirection and filtering UI -->
+<% if count == 0 %>
+    <h3 style="text-align: center">
+        <%= translate(locale, "Broken?") %> <a href="/redirect?q=<%= HTML.escape(query.not_nil!) %>&page=<%= page + 1 %>"><%= translate(locale, "Switch Invidious Instance") %></a>
+    </h3>
+<% else %>
+    <details id="filters">
         <summary>
             <h3 style="display:inline"> <%= translate(locale, "filter") %> </h3>
         </summary>
@@ -87,7 +93,8 @@
                 <% end %>
             </div>
         </div>
-</details>
+    </details>
+<% end %>
 
 <hr/>