Search: Add support for youtu.be and youtube.com URLs

src/invidious/routes/search.cr

@@ -51,6 +51,12 @@ module Invidious::Routes::Search
     else
       user = env.get? "user"
 
+      # An URL was copy/pasted in the search box.
+      # Redirect the user to the appropriate page.
+      if query.is_url?
+        return env.redirect UrlSanitizer.process(query.text).to_s
+      end
+
       begin
         items = query.process
       rescue ex : ChannelSearchException

src/invidious/search/query.cr

@@ -48,11 +48,12 @@ module Invidious::Search
     )
       # Get the raw search query string (common to all search types). In
       # Regular search mode, also look for the `search_query` URL parameter
-      if @type.regular?
-        @raw_query = params["q"]? || params["search_query"]? || ""
-      else
-        @raw_query = params["q"]? || ""
-      end
+      _raw_query = params["q"]?
+      _raw_query ||= params["search_query"]? if @type.regular?
+      _raw_query ||= ""
+
+      # Remove surrounding whitespaces. Mostly useful for copy/pasted URLs.
+      @raw_query = _raw_query.strip
 
       # Get the page number (also common to all search types)
       @page = params["page"]?.try &.to_i? || 1
@@ -85,7 +86,7 @@ module Invidious::Search
           @filters = Filters.from_iv_params(params)
           @channel = params["channel"]? || ""
 
-          if @filters.default? && @raw_query.includes?(':')
+          if @filters.default? && @raw_query.index(/\w:\w/)
             # Parse legacy filters from query
             @filters, @channel, @query, subs = Filters.from_legacy_filters(@raw_query)
           else
@@ -136,5 +137,19 @@ module Invidious::Search
 
       return params
     end
+
+    # Checks if the query is a standalone URL
+    def is_url? : Bool
+      # Only supported in regular search mode
+      return false if !@type.regular?
+
+      # If filters are present, that's a regular search
+      return false if !@filters.default?
+
+      # Simple heuristics: domain name
+      return @raw_query.starts_with?(
+        /(https?:\/\/)?(www\.)?(m\.)?youtu(\.be|be\.com)\//
+      )
+    end
   end
 end