Implemented a response donation interface

ref #66

src/models/responses/IResponseDonation.ts

@@ -0,0 +1,37 @@
+import { IsInt, IsNotEmpty, IsPositive } from "class-validator";
+import { Donation } from '../entities/Donation';
+import { ResponseDonor } from './ResponseDonor';
+
+/**
+ * Defines the donation response interface.
+*/
+export abstract class IResponseDonation {
+    /**
+     * The donation's id.
+     */
+    @IsInt()
+    @IsPositive()
+    id: number;
+
+    /**
+     * The donation's donor.
+     */
+    @IsNotEmpty()
+    donor: ResponseDonor;
+
+    /**
+     * The donation's amount in the smalles unit of your currency (default: euro cent).
+     */
+    @IsInt()
+    amount: number;
+
+    /**
+     * Creates a IResponseDonation object from a scan.
+     * @param donation The donation the response shall be build for.
+     */
+    public constructor(donation: Donation) {
+        this.id = donation.id;
+        this.donor = donation.donor.toResponse();
+        this.amount = donation.amount;
+    }
+}