#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

Icarus/Database/Contexts/ArtistContext.cs

@@ -0,0 +1,34 @@
+using Microsoft.EntityFrameworkCore;
+
+using Icarus.Models;
+
+namespace Icarus.Database.Contexts;
+
+public class ArtistContext : DbContext
+{
+    public DbSet<Artist> Artists { get; set; }
+
+    public ArtistContext(DbContextOptions<ArtistContext> options) : base (options) { }
+    public ArtistContext(string connString) : base(new DbContextOptionsBuilder<ArtistContext>()
+                        .UseMySQL(connString).Options)
+    {
+    }                        
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Artist>()
+            .ToTable("Artist");
+    }
+
+    public Artist RetrieveRecord(Artist artist)
+    {
+
+        return Artists.FirstOrDefault(arst => arst.Id == artist.Id)!;
+    }
+
+
+    public bool DoesRecordExist(Artist artist)
+    {
+        return Artists.FirstOrDefault(arst => arst.Id == artist.Id) != null ? true : false;
+    }
+}