Clean up of purchase data (#190)

Co-authored-by: Jonas Anker Rasmussen <jonasanker@gmail.com>

coffeecard/CoffeeCard.Library/Migrations/20230711144034_AddPurchaseTypes.cs

@@ -0,0 +1,53 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CoffeeCard.Library.Migrations
+{
+    public partial class AddPurchaseTypes : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "PurchaseId",
+                schema: "dbo",
+                table: "Vouchers",
+                type: "int",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "Type",
+                schema: "dbo",
+                table: "Purchases",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "PosPurchases",
+                schema: "dbo",
+                columns: table => new
+                {
+                    PurchaseId = table.Column<int>(type: "int", nullable: false),
+                    BaristaInitials = table.Column<string>(type: "nvarchar(max)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_PosPurchases", x => x.PurchaseId);
+                    table.ForeignKey(
+                        name: "FK_PosPurchases_Purchases_PurchaseId",
+                        column: x => x.PurchaseId,
+                        principalSchema: "dbo",
+                        principalTable: "Purchases",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "PosPurchases",
+                schema: "dbo");
+        }
+    }
+}