feature: implement payment verification, make cart as converted after successful payment

src/app/core/layouts/header/header.ts

@@ -6,10 +6,11 @@ import { Cart } from "@app/shared/components/cart/cart";
 import { CartModel } from "@app/core/models/cart.model";
 import { map } from "rxjs";
 import { AsyncPipe } from "@angular/common";
+import { RouterLink } from "@angular/router";
 
 @Component({
   selector: "app-header",
-  imports: [LucideAngularModule, Cart, AsyncPipe],
+  imports: [LucideAngularModule, Cart, AsyncPipe, RouterLink],
   templateUrl: "./header.html",
   styleUrl: "./header.css",
 })
@@ -19,8 +20,7 @@ export class Header {
   readonly SearchIcon = Search;
   readonly authService = inject(AuthService);
   readonly cartService = inject(CartService);
-  protected readonly AuthState = AuthState;
-
   cartItems$ = this.cartService.cartItems$;
   cartItemCount = this.cartItems$.pipe(map((cart: CartModel) => cart.itemsCount ?? 0));
+  protected readonly AuthState = AuthState;
 }

src/app/core/services/cart-service.ts

@@ -1,9 +1,8 @@
 import { HttpClient, HttpErrorResponse } from "@angular/common/http";
-import { effect, inject, Injectable, signal } from "@angular/core";
+import { effect, inject, Injectable } from "@angular/core";
 import { API_URL } from "../tokens/api-url-tokens";
-import { CartItemModel, CartItemRequest, CartModel } from "../models/cart.model";
-import { AuthService, AuthState } from "@core/services/auth-service";
-import { Cart } from "@app/shared/components/cart/cart";
+import { CartItemRequest, CartModel } from "../models/cart.model";
+import { AuthService } from "@core/services/auth-service";
 import { BehaviorSubject, tap } from "rxjs";
 
 @Injectable({
@@ -29,7 +28,7 @@ export class CartService {
     });
   }
 
-  private fetchCart() {
+  fetchCart() {
     return this.http.get<CartModel>(this.apiUrl + "/cart").subscribe({
       next: (data) => this._cartItems.next(data),
       error: (error: HttpErrorResponse) => {

src/app/features/checkout/confirmation/confirmation.html

@@ -1,27 +1,47 @@
 <div class="flex flex-col gap-4 items-center justify-center">
+  <app-loading-spinner [isLoading]="isProcessing()">
     <div class="card max-w-md text-center flex items-center flex-col gap-4">
-    <div class="rounded-full bg-green-100 p-4">
+      <div
+        [class.bg-green-100]="paymentData()!.isSuccess"
+        [class.bg-red-100]="!paymentData()!.isSuccess"
+        class="rounded-full p-4"
+      >
+        @if (paymentData()!.isSuccess) {
         <lucide-angular [img]="BadgeCheck" class="w-6 h-6 text-green-500" />
+        } @else {
+        <lucide-angular [img]="BadgeQuestionMark" class="w-6 h-6 text-red-500" />
+        }
       </div>
-    <p class="text-xl font-medium text-green-600">Payment Successful</p>
-    <p class="text-sm text-gray-400">
-      Your payment processed successfully. You will receive a confirmation email shortly.
+      <p
+        [class.text-green-500]="paymentData()!.isSuccess"
+        [class.text-red-500]="!paymentData()!.isSuccess"
+        class="text-xl font-medium"
+      >
+        {{ paymentData()!.message }}
       </p>
+      <p class="text-sm text-gray-400">
+        @if (paymentData()!.isSuccess) { Your payment processed successfully. You will receive a
+        confirmation email shortly. } @else { If money is debited then wait for few hours then check
+        payment status. }
+      </p>
+      @if (paymentData()!.isSuccess) {
       <article class="rounded-xl bg-gray-100 px-3 py-4 text-gray-500 text-sm w-full space-y-4">
         <article class="flex justify-between border-b border-b-gray-200 pb-4">
           <p class="font-medium">Amount</p>
-        <p>Rs. 20000</p>
+          <p>Rs.{{ paymentData()?.amount }}</p>
         </article>
 
         <article class="flex justify-between">
           <p class="font-medium">Transaction ID</p>
-        <p class="truncate">text_ch_989789y789jhhg8h8</p>
+          <p class="truncate">{{ paymentData()?.transactionId }}</p>
         </article>
         <article class="flex justify-between">
           <p class="font-medium">Payment method</p>
-        <p>Stripe Checkout</p>
+          <p>{{ paymentData()?.paymentMethod | uppercase }}</p>
         </article>
       </article>
+      }
     </div>
+  </app-loading-spinner>
   <app-go-back class="w-min-content! flex-nowrap" route="/" text="Continue Shopping" />
 </div>

src/app/features/checkout/confirmation/confirmation.ts

@@ -1,24 +1,73 @@
-import { Component, inject } from "@angular/core";
-import { BadgeCheck, LucideAngularModule } from "lucide-angular";
+import { Component, DestroyRef, inject, OnInit, signal } from "@angular/core";
+import { BadgeCheck, BadgeQuestionMark, LucideAngularModule } from "lucide-angular";
 import { GoBack } from "@shared/components/go-back/go-back";
 import { ActivatedRoute } from "@angular/router";
+import { LoadingSpinner } from "@shared/components/loading-spinner/loading-spinner";
+import {
+  OrderService,
+  PaymentVerificationResponse,
+} from "@app/features/checkout/services/order-service";
+import { finalize, tap } from "rxjs";
+import { takeUntilDestroyed } from "@angular/core/rxjs-interop";
+import { UpperCasePipe } from "@angular/common";
+import { CartService } from "@core/services/cart-service";
 
 @Component({
   selector: "app-confirmation",
-  imports: [LucideAngularModule, GoBack],
+  imports: [LucideAngularModule, GoBack, LoadingSpinner, UpperCasePipe],
   templateUrl: "./confirmation.html",
   styleUrl: "./confirmation.css",
 })
-class Confirmation {
+export default class Confirmation implements OnInit {
+  destroyRef = inject(DestroyRef);
+  protected paymentData = signal<PaymentVerificationResponse | null>(null);
+  protected isProcessing = signal(false);
   protected readonly BadgeCheck = BadgeCheck;
+  protected readonly BadgeQuestionMark = BadgeQuestionMark;
   private route = inject(ActivatedRoute);
+  private orderService = inject(OrderService);
+  private cartService = inject(CartService);
   private orderId: string | null = null;
   private sessionId: string | null = null;
 
   ngOnInit() {
-    this.orderId = this.route.snapshot.paramMap.get("order_id");
-    this.sessionId = this.route.snapshot.paramMap.get("session_id");
-  }
+    this.orderId = this.route.snapshot.queryParamMap.get("order_id");
+    this.sessionId = this.route.snapshot.queryParamMap.get("session_id");
+    this.checkConfirmation();
   }
 
-export default Confirmation;
+  private checkConfirmation() {
+    if (!this.orderId || !this.sessionId) {
+      console.error("Missing order ID or session ID");
+      return;
+    }
+    try {
+      this.isProcessing.set(true);
+      const orderId = parseInt(this.orderId!);
+      this.orderService
+        .verifyPayment(orderId, this.sessionId!)
+        .pipe(
+          tap((data) => {
+            this.paymentData.set(data);
+            if (data && data.isSuccess) {
+              this.cartService.fetchCart();
+            }
+          }),
+          finalize(() => this.isProcessing.set(false)),
+          takeUntilDestroyed(this.destroyRef),
+        )
+        .subscribe({
+          next: () => {
+            console.log("Payment verified successfully");
+          },
+          error: (err) => {
+            console.error(err);
+          },
+        });
+    } catch (e) {
+      this.isProcessing.set(false);
+      console.error(e);
+      return;
+    }
+  }
+}

src/app/features/checkout/services/order-service.ts

@@ -6,6 +6,14 @@ import { FormControl, Validators } from "@angular/forms";
 import { tap } from "rxjs";
 import { SessionStorageService } from "@core/services/session-storage.service";
 
+export interface PaymentVerificationResponse {
+  isSuccess: boolean;
+  message: string;
+  amount: number | null;
+  transactionId: string | null;
+  paymentMethod: string | null;
+}
+
 export interface CheckoutResponse {
   success: boolean;
   amount: number;
@@ -61,4 +69,11 @@ export class OrderService {
       },
     );
   }
+
+  verifyPayment(orderId: number, sessionId: string) {
+    return this.http.post<PaymentVerificationResponse>(`${this.apiUrl}/payments/verify`, {
+      orderId: orderId,
+      sessionId: sessionId,
+    });
+  }
 }