Updated Song model to include ArtistId, Updated Artist Model, and partially implemented Artist API endpoint functionality. I left TODO's on where to pick up. #19, #21, #26

Models/Context/ArtistContext.cs

@@ -12,7 +12,7 @@ namespace Icarus.Models.Context
 {
 	public class ArtistContext : DbContext
 	{
-		public DbSet<Artist> Artist { get; set; }
+		public DbSet<Artist> Artists { get; set; }
 
 		public ArtistContext(DbContextOptions<ArtistContext> options)
 			: base (options)
@@ -20,7 +20,8 @@ namespace Icarus.Models.Context
 
 		protected override void OnModelCreating(ModelBuilder modelBuilder)
 		{
-			modelBuilder.Entity<Artist>();
+			modelBuilder.Entity<Artist>()
+				.ToTable("Artist");
 		}
 	}
 }

Models/Context/ArtistStoreContext.cs

@@ -43,18 +43,8 @@ namespace Icarus.Models.Context
 					{
 						using (var reader = cmd.ExecuteReader())
 						{
-							while (reader.Read())
-							{
-								var id = Convert.ToInt32(reader["Id"].ToString());
-								var name = reader["Name"].ToString();
-								var songCount = Convert.ToInt32(reader["SongCount"].ToString());
-								artists.Add(new Artist
-								{
-									Id = id,
-									Name = name,
-									SongCount = songCount
-								});
-							}
+
+							artists = ParseData(reader);
 						}
 					}
 				}
@@ -67,6 +57,211 @@ namespace Icarus.Models.Context
 
 			return artists;
 		}
+
+
+		public bool DoesArtistExist(Artist artist)
+		{
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+
+					var query = "SELECT * FROM Artist WHERE ArtistId=@ArtistId";
+					using (MySqlCommand cmd = new MySqlCommand(query, conn))
+					{
+						cmd.Parameters.AddWithValue("@AlbumId", artist.ArtistId);
+						
+						using (var reader = cmd.ExecuteReader())
+						{
+							artist =  ParseSingleData(reader);
+
+							if (artist.Name != null)
+							{
+								_logger.Info($"Artist {artist.Name} exists");
+								return true;
+							}
+						}
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+			return false;
+		}
+		public bool DoesArtistExist(Song song)
+		{
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+
+					var query = "SELECT * FROM Album WHERE Name=@Name";
+					using (MySqlCommand cmd = new MySqlCommand(query, conn))
+					{
+						cmd.Parameters.AddWithValue("@Name", song.Artist);
+						
+						using (var reader = cmd.ExecuteReader())
+						{
+							var artist =  ParseSingleData(reader);
+
+							if (!String.IsNullOrEmpty(artist.Name))
+							{
+								_logger.Info($"Artist {artist.Name} exists");
+								return true;
+							}
+						}
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+			return false;
+		}
+
+
+		public void SaveArtist(Artist artist)
+		{
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+					var query = "INSERT INTO Artist(Name, SongCount) " +
+						"VALUES(@Name, @SongCount)";
+
+					using (MySqlCommand cmd = new MySqlCommand(query, conn))
+					{
+						cmd.Parameters.AddWithValue("@Name", artist.Name);
+						cmd.Parameters.AddWithValue("@SongCount", artist.SongCount);
+
+						cmd.ExecuteNonQuery();
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+		}
+		public void UpdateArtist(Artist artist)
+		{
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+					// TODO: Implement functionality
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+		}
+
+		public Artist GetArtist(Artist artist)
+		{
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+
+					var query = "SELECT * FROM Artist WHERE ArtistId=@ArtistId";
+					using (MySqlCommand cmd = new MySqlCommand(query, conn))
+					{
+						cmd.Parameters.AddWithValue("@ArtistId", artist.ArtistId);
+						using (var reader = cmd.ExecuteReader())
+						{
+							artist = ParseSingleData(reader);
+						}
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+
+			return artist;
+		}
+		public Artist GetArtist(Song song)
+		{
+			Artist artist = new Artist();
+			try
+			{
+				using (MySqlConnection conn = GetConnection())
+				{
+					conn.Open();
+
+					var query = "SELECT * FROM Artist WHERE ArtistId=@ArtistId";
+					using (MySqlCommand cmd = new MySqlCommand(query, conn))
+					{
+						cmd.Parameters.AddWithValue("@ArtistId", song.ArtistId);
+						using (var reader = cmd.ExecuteReader())
+						{
+							artist = ParseSingleData(reader);
+						}
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+				_logger.Error(msg, "An error occurred");
+			}
+
+			return artist;
+		}
+
+
+		private List<Artist> ParseData(MySqlDataReader reader)
+		{
+			List<Artist> artists = new List<Artist>();
+
+			while (reader.Read())
+			{
+				var id = Convert.ToInt32(reader["ArtistId"]);
+				var name = reader["Name"].ToString();
+				var songCount = Convert.ToInt32(reader["SongCount"].ToString());
+				artists.Add(new Artist
+				{
+					ArtistId = id,
+					Name = name,
+					SongCount = songCount
+				});
+			}
+
+			return artists;
+		}
+
+		private Artist ParseSingleData(MySqlDataReader reader)
+		{
+			Artist artist = new Artist();
+
+			while (reader.Read())
+			{
+				var id = Convert.ToInt32(reader["ArtistId"]);
+				var name = reader["Name"].ToString();
+				var songCount = Convert.ToInt32(reader["SongCount"].ToString());
+				artist.ArtistId = id;
+				artist.Name = name;
+				artist.SongCount = songCount;
+			}
+
+			return artist;
+		}
 		#endregion
 	}
 }

Models/Context/SongContext.cs

@@ -24,9 +24,15 @@ namespace Icarus.Models.Context
             		modelBuilder.Entity<Song>()
 				.ToTable("Song")
 				.HasOne(s => s.Album)
-				.WithMany(a => a.Songs)
+				.WithMany(al => al.Songs)
 				.HasForeignKey(s => s.AlbumId)
 				.HasConstraintName("ForeignKey_Song_Album");
+
+			modelBuilder.Entity<Song>()
+				.HasOne(sa => sa.SongArtist)
+				.WithMany(ar => ar.Songs)
+				.HasForeignKey(s => s.ArtistId)
+				.HasConstraintName("ForeignKey_Song_Artist");
         	}
     	}
 }