add null safety to clip parsing

src/invidious/routes/watch.cr

@@ -277,8 +277,8 @@ module Invidious::Routes::Watch
     if video_id = response.dig?("endpoint", "watchEndpoint", "videoId")
       if params = response.dig?("endpoint", "watchEndpoint", "params").try &.as_s
         start_time, end_time, _ = parse_clip_parameters(params)
-        env.params.query["start"] = start_time.to_s
-        env.params.query["end"] = end_time.to_s
+        env.params.query["start"] = start_time.to_s if start_time != nil
+        env.params.query["end"] = end_time.to_s if end_time != nil
       end
 
       return env.redirect "/watch?v=#{video_id}&#{env.params.query}"

src/invidious/videos/clip.cr

@@ -1,7 +1,7 @@
 require "json"
 
 # returns start_time, end_time and clip_title
-def parse_clip_parameters(params) : {Float64, Float64, String}
+def parse_clip_parameters(params) : {Float64?, Float64?, String?}
   decoded_protobuf = params.try { |i| URI.decode_www_form(i) }
     .try { |i| Base64.decode(i) }
     .try { |i| IO::Memory.new(i) }
@@ -9,12 +9,14 @@ def parse_clip_parameters(params) : {Float64, Float64, String}
 
   start_time = decoded_protobuf
     .try(&.["50:0:embedded"]["2:1:varint"].as_i64)
+    .try { |i| i/1000 }
 
   end_time = decoded_protobuf
     .try(&.["50:0:embedded"]["3:2:varint"].as_i64)
+    .try { |i| i/1000 }
 
   clip_title = decoded_protobuf
     .try(&.["50:0:embedded"]["4:3:string"].as_s)
 
-  return (start_time / 1000), (end_time / 1000), clip_title
+  return start_time, end_time, clip_title
 end