Can now dynamically update song metadata, discovered and fixed a bug that would update all Song records when updating a single song's metadata #36

Controllers/Utilities/MetadataRetriever.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 
 using TagLib;
 
@@ -9,6 +10,8 @@ namespace Icarus.Controllers.Utilities
 	public class MetadataRetriever
 	{
 		#region Fields
+		private Song _updatedSong;
+		private string _message;
 		private string _title;
 		private string _artist;
 		private string _album;
@@ -19,6 +22,16 @@ namespace Icarus.Controllers.Utilities
 
 
 		#region Properties
+		public Song UpdatedSongRecord
+		{
+			get => _updatedSong;
+			set => _updatedSong = value;
+		}
+		public string Message
+		{
+			get => _message;
+			set => _message = value;
+		}
 		#endregion
 
 
@@ -74,9 +87,92 @@ namespace Icarus.Controllers.Utilities
 			catch (Exception ex)
 			{
 				var msg = ex.Message;
+				Console.WriteLine($"An error occurred: \n{msg}");
+			}
+		}
+		public void UpdateMetadata(Song updatedSong, Song oldSong)
+		{
+			try
+			{
+				InitializeUpdatedSong(oldSong);
+				var songValues = CheckSongValues(updatedSong);
+				PerformUpdate(updatedSong, songValues);
+				Message = "Successfully updated metadata";
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				Console.WriteLine($"An error occurred: {msg}");
+				Message = "Failed to update metadata";
 			}
 		}
 
+		private void PerformUpdate(Song updatedSong, SortedDictionary<string, bool> checkedValues)
+		{
+			var filePath = updatedSong.SongPath;
+			var title = updatedSong.Title;
+			var artist = updatedSong.Artist;
+			var album = updatedSong.Album;
+			var genre = updatedSong.Genre;
+			var year = updatedSong.Year;
+			TagLib.File fileTag = TagLib.File.Create(filePath);
+			try
+			{
+				Console.WriteLine($"Updating metadata of {title}");
+				foreach (var key in checkedValues.Keys)
+				{
+					bool result = checkedValues[key];
+					if (!result)
+					{
+						switch (key.ToLower())
+						{
+							case "title":
+								_updatedSong.Title = title;
+								fileTag.Tag.Title = title;
+								break;
+							case "artists":
+								_updatedSong.Artist = artist;
+								fileTag.Tag.Artists = new []{artist};
+								break;
+							case "album":
+								_updatedSong.Album = album;
+								fileTag.Tag.Album = album;
+								break;
+							case "genre":
+								_updatedSong.Genre = genre;
+								fileTag.Tag.Genres = new []{genre};
+								break;
+							case "year":
+								_updatedSong.Year = year;
+								fileTag.Tag.Year = (uint)year;
+								break;
+						}
+					}
+				}
+				fileTag.Save();
+				Console.WriteLine("Successfully updated metadata");
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				Console.WriteLine($"An error occurred:\n{msg}");
+			}
+		}
+		private void InitializeUpdatedSong(Song song)
+		{
+			_updatedSong = new Song
+			{
+				Id = song.Id,
+				Title = song.Title,
+			     	Album = song.Album,
+		     	     	Artist = song.Artist,
+				Genre = song.Genre,
+				Year = song.Year,
+				Duration = song.Duration,
+				Filename = song.Filename,
+				SongPath = song.SongPath
+			};
+		}
 		private void PrintMetadata()
 		{
 			Console.WriteLine("\n\nMetadata of the song:");
@@ -87,6 +183,45 @@ namespace Icarus.Controllers.Utilities
 			Console.WriteLine($"Year: {_year}");
 			Console.WriteLine($"Duration: {_duration}\n\n");
 		}
+		private void PrintMetadata(Song song, string message)
+		{
+			Console.WriteLine($"\n\n{message}");
+			Console.WriteLine($"Title: {song.Title}");
+			Console.WriteLine($"Artist: {song.Artist}");
+			Console.WriteLine($"Album: {song.Album}");
+			Console.WriteLine($"Genre: {song.Genre}");
+			Console.WriteLine($"Year: {song.Year}");
+			Console.WriteLine($"Duration: {song.Duration}\n\n");
+		}
+
+		private SortedDictionary<string, bool> CheckSongValues(Song song)
+		{
+			var songValues = new SortedDictionary<string, bool>();
+			Console.WriteLine("Checking for null data");
+			try
+			{
+				songValues["Title"] = String.IsNullOrEmpty(song.Title);
+				songValues["Artists"] = String.IsNullOrEmpty(song.Artist);
+				songValues["Album"] = String.IsNullOrEmpty(song.Album);
+				songValues["Genre"] = String.IsNullOrEmpty(song.Genre);
+				if (song.Year==0)
+				{
+					songValues["Year"] = true;
+				}
+				else
+				{
+					songValues["Year"] = false;
+				}
+				Console.WriteLine("Checking for null data completed");
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				Console.WriteLine($"An error occurred: \n{msg}");
+			}
+
+			return songValues;
+		}	
 		#endregion
 	}
 }

Models/Context/MusicStoreContext.cs

@@ -57,7 +57,8 @@ namespace Icarus.Models.Context
 
 		    			string query = "UPDATE Songs SET Title=@Title, Album=@Album, " +
 							"Artist=@Artist, Year=@Year, Genre=@Genre, " +
-				   		"Duration=@Duration, Filename=@Filename, SongPath=@SongPath";
+				   			"Duration=@Duration, Filename=@Filename, " +
+							"SongPath=@SongPath WHERE Id=@Id";
 					using (MySqlCommand cmd = new MySqlCommand(query, conn))
 					{
 		        			cmd.Parameters.AddWithValue("@Title", song.Title);
@@ -68,6 +69,7 @@ namespace Icarus.Models.Context
 						cmd.Parameters.AddWithValue("@Duration", song.Duration);
 						cmd.Parameters.AddWithValue("@Filename", song.Filename);
 						cmd.Parameters.AddWithValue("@SongPath", song.SongPath);
+						cmd.Parameters.AddWithValue(@"Id", song.Id);
 
 						cmd.ExecuteNonQuery();
 					}