#102: Moving Models and constants to their own library (#104)

* #102: Moving Models and constants to their own library * #102: Updated sln file * #102: Updated README to include step install migration tool
2024-08-05 20:05:57 -04:00
parent 8900afdfd2
commit a89580ac70
52 changed files with 53 additions and 25 deletions
@@ -0,0 +1,146 @@
+using Icarus.Models;
+using Icarus.Database.Contexts;
+
+namespace Icarus.Controllers.Managers;
+
+public class AlbumManager : BaseManager
+{
+    #region Fields
+    private AlbumContext? _albumContext;
+    #endregion
+
+
+    #region Properties
+    #endregion
+
+
+    #region Constructors
+    public AlbumManager(IConfiguration config)
+    {
+        _config = config;
+        _connectionString = _config.GetConnectionString("DefaultConnection");
+        _albumContext = new AlbumContext(_connectionString!);
+    }
+    #endregion
+
+
+    #region Methods
+    public void SaveAlbumToDatabase(ref Song song)
+    {
+        _logger.Info("Starting process to save the album record of the song to the database");
+
+        var album = new Album();
+
+        album.Title = song.AlbumTitle;
+        album.AlbumArtist = song.Artist;
+        album.Year = song.Year!.Value;
+        var albumTitle = song.AlbumTitle;
+        var albumArtist = song.Artist;
+
+        var albumRetrieved = _albumContext!.Albums!.FirstOrDefault(alb => alb.Title!.Equals(albumTitle) && alb.AlbumArtist!.Equals(albumArtist));
+
+        if (albumRetrieved == null)
+        {
+            album.SongCount = 1;
+            _albumContext.Add(album);
+            _albumContext.SaveChanges();
+
+            Console.WriteLine($"Album Id {album.Id}");
+        }
+        else
+        {
+            album.Id = albumRetrieved.Id;
+        }
+
+        song.AlbumId = album.Id;
+    }
+
+
+    public void DeleteAlbumFromDatabase(Song song)
+    {
+        var album = _albumContext!.Albums!.FirstOrDefault(alb => alb.Title!.Equals(song.AlbumTitle));
+
+        if (album == null)
+        {
+            _logger.Info("Cannot delete the album record because it does not exist");
+            return;
+        }
+
+        DeleteAlbumFromDb(album);
+    }
+
+
+    public Album UpdateAlbumInDatabase(Song oldSong, Song newSong)
+    {
+        var albumRecord = _albumContext!.Albums!.FirstOrDefault(alb => alb.Title!.Equals(oldSong.AlbumTitle));
+        var oldAlbumTitle = oldSong.AlbumTitle;
+        var oldAlbumArtist = oldSong.Artist;
+        var newAlbumTitle = newSong.AlbumTitle;
+        var newAlbumArtist = newSong.Artist;
+
+        var info = string.Empty;
+
+        if (string.IsNullOrEmpty(newAlbumArtist))
+            newAlbumArtist = oldAlbumArtist;
+        if (string.IsNullOrEmpty(newAlbumTitle))
+            newAlbumTitle = oldAlbumTitle;
+
+        if ((string.IsNullOrEmpty(newAlbumTitle) && string.IsNullOrEmpty(newAlbumArtist) || 
+                    oldAlbumTitle!.Equals(newAlbumTitle) && oldAlbumArtist!.Equals(newAlbumArtist)))
+        {
+            _logger.Info("No change to the song's album");
+            return albumRecord!;
+        }
+
+        info = "Change to the song's album";
+        _logger.Info(info);
+
+        var existingAlbumRecord = _albumContext.Albums!.FirstOrDefault(alb => alb.Title!.Equals(oldSong.AlbumTitle));
+        if (existingAlbumRecord == null)
+        {
+            _logger.Info("Creating new album record");
+
+            var newAlbumRecord = new Album
+            {
+                Title = newAlbumTitle,
+                AlbumArtist = newAlbumArtist,
+                Year = newSong.Year!.Value
+            };
+
+            _albumContext.Add(newAlbumRecord);
+            _albumContext.SaveChanges();
+
+            return newAlbumRecord;
+        }
+        else
+        {
+            _logger.Info("Updating existing album record");
+
+            existingAlbumRecord = _albumContext.Albums!.FirstOrDefault(alb => alb.Title!.Equals(newSong.AlbumTitle));
+            existingAlbumRecord!.AlbumArtist = newAlbumArtist;
+
+            _albumContext.Update(existingAlbumRecord);
+            _albumContext.SaveChanges();
+
+            return existingAlbumRecord;
+        }
+    }
+
+    private void DeleteAlbumFromDb(Album album)
+    {
+        if (SongsInAlbum(album) <= 1)
+        {
+            _albumContext!.Remove(album);
+            _albumContext.SaveChanges();
+        }
+    }
+
+    private int SongsInAlbum(Album album)
+    {
+        var sngContext = new SongContext(_connectionString!);
+        var songs = sngContext!.Songs!.Where(sng => sng.AlbumId == album.Id).ToList();
+
+        return songs.Count;
+    }
+    #endregion
+}