proxy pattern

Author: pestsov-v

structure_patterns/Proxy.ts

@@ -0,0 +1,33 @@
+interface IPaymentAPI {
+	getPaymenyDetail(id: number): IPaymentDetail | undefined;
+}
+
+interface IPaymentDetail {
+	id: number;
+	sum: number;
+}
+
+class PaymentAPI implements  IPaymentAPI {
+	private data = [{id: 1, sum: 1000 }]
+	getPaymenyDetail(id: number): IPaymentDetail | undefined {
+		return this.data.find(d => d.id === id)
+	}
+}
+
+class PaymentAccessProxy implements IPaymentAPI {
+	constructor(private api: PaymentAPI, private userId: number) {}
+
+	getPaymenyDetail(id: number): IPaymentDetail | undefined{
+		if (this.userId === 1) {
+			return this.api.getPaymenyDetail(id)
+		}
+		console.log('Попытка получить данные платежа')
+		return undefined
+	}
+}
+
+const proxy = new PaymentAccessProxy(new PaymentAPI(), 1)
+console.log(proxy.getPaymenyDetail(1))
+
+const proxy2 = new PaymentAccessProxy(new PaymentAPI(), 2)
+console.log(proxy.getPaymenyDetail(2))