feat: basic initial implementation of spotify client link validator and song submission form refs: NOISSUE

song_of_the_day/SongValidators/YoutubeMusicValidator.cs

@@ -0,0 +1,43 @@
+using AngleSharp;
+using AngleSharp.Dom;
+
+public class YoutubeMusicValidator : UriBasedSongValidatorBase
+{
+    public override string UriValidatorRegex => @"^(https?://)?(music\.youtube\.com/watch\?v=|youtu\.be/)([a-zA-Z0-9_-]{11})";
+
+    public override async Task<bool> CanExtractSongMetadataAsync(Uri songUri)
+    {
+        return this.CanValidateUri(songUri);
+    }
+
+    public override async Task<Song> ValidateAsync(Uri songUri)
+    {
+        var title = string.Empty;
+        var artist = string.Empty;
+
+        using(HttpClient httpClient = new HttpClient())
+        {
+            var response = await httpClient.GetAsync(songUri);
+            var config = Configuration.Default.WithDefaultLoader();
+            var context = BrowsingContext.New(config);
+            using(var document = await context.OpenAsync(async req => req.Content(await response.Content.ReadAsStringAsync())))
+            {
+                // document.getElementsByTagName("ytmusic-player-queue-item")[0].getElementsByClassName("song-title")[0].innerHTML
+                title = document.QuerySelector(".ytmusic-player-queue-item")?.QuerySelector(".song-title")?.InnerHtml;
+                // document.getElementsByTagName("ytmusic-player-queue-item")[0].getElementsByClassName("byline")[0].innerHTML
+                artist = document.QuerySelector(".ytmusic-player-queue-item")?.QuerySelector(".byline")?.InnerHtml;
+            }
+        }
+        
+        var song = new Song
+        {
+            Name = title,
+            Artist = artist,
+            Url = songUri.ToString(),
+            Provider = SongProvider.YouTube,
+            SpotifyId = this.LookupSpotifyId(title, artist)
+        };
+
+        return song;
+    }
+}