Add pwa support

Tesses.YouTubeDownloader/src/ids.tcross

@@ -27,6 +27,7 @@ func TYTD.GetVideoId(v)
                 return null;
 
 }
+
 func TYTD.GetPlaylistId(pid)
 {
     func IsValidId(v)
@@ -84,4 +85,49 @@ func TYTD.GetChannelId(cid)
                 }
                 return null;
 
+}
+
+func TYTD.CreateYouTubeTempPlaylist(ids)
+{
+    var url = "https://www.youtube.com/watch_videos?video_ids=";
+    var first=true;
+    each(var item : ids)
+    {
+        if(!first) url += $"{url},{Net.Http.UrlEncode(item)}";
+        else
+            url += Net.Http.UrlEncode(item);
+        first=false;
+    }
+    return url;
+}
+func TYTD.GetYouTubeTempPlaylistRedirect(url)
+{
+    if(url.Contains("/watch_videos?") && url.Contains("video_ids="))
+    {
+        var queryPart = url.Split("?",true,2);
+        return $"/watch_videos?{queryPart[1]}";
+    }
+    return null;
+}
+func TYTD.GetYouTubeTempPlaylist(url)
+{
+    if(url.Contains("/watch_videos?") && url.Contains("video_ids="))
+    {
+        var queryPart = url.Split("?",true,2);
+        if(queryPart.Length == 2)
+        {
+            var queryParms =queryPart[1].Split("&");
+            
+            each(var item : queryParms)
+            {
+                const vals = item.Split("=",true,2);
+                if(vals.Length == 2 && vals[0] == "video_ids")
+                {
+                    return Net.Http.UrlDecode(vals[1]).Split(",");
+
+                }
+            }
+        }
+    }
+    return null;
 }