feat(auth): implement Google OAuth login flow and handle session clearing on 401

src/app/features/store/pages/login-page/login-page.component.html

@@ -81,7 +81,8 @@
   variant="neutral-outline"
   hostClass="w-100 d-block"
   buttonClass="w-100 d-inline-flex align-items-center justify-content-center gap-2 py-2 fw-semibold"
-  [disabled]="true"
+  [disabled]="isSubmitting()"
+  (click)="loginWithGoogle()"
 >
   <svg
     xmlns="http://www.w3.org/2000/svg"

src/app/features/store/pages/login-page/login-page.component.ts

@@ -1,7 +1,7 @@
-import { DOCUMENT } from '@angular/common';
-import { ChangeDetectionStrategy, Component, inject, signal } from '@angular/core';
+import { DOCUMENT, isPlatformBrowser } from '@angular/common';
+import { ChangeDetectionStrategy, Component, inject, PLATFORM_ID, signal } from '@angular/core';
 import { FormBuilder, ReactiveFormsModule, Validators } from '@angular/forms';
-import { Router } from '@angular/router';
+import { ActivatedRoute, Router } from '@angular/router';
 
 import { AuthService } from '../../../../core/services/auth/auth.service';
 import { ButtonComponent } from '../../../../shared/components/button/button.component';
@@ -20,8 +20,10 @@ const EMAIL_MAX_LENGTH = 255;
 export class LoginPageComponent {
   private readonly formBuilder = inject(FormBuilder);
   private readonly router = inject(Router);
+  private readonly route = inject(ActivatedRoute);
   private readonly authService = inject(AuthService);
   private readonly document = inject(DOCUMENT);
+  private readonly platformId = inject(PLATFORM_ID);
 
   private readonly submittedState = signal(false);
   private readonly serverErrorState = signal<string | null>(null);
@@ -35,6 +37,18 @@ export class LoginPageComponent {
   protected readonly serverError = this.serverErrorState.asReadonly();
   protected readonly isSubmitting = this.isSubmittingState.asReadonly();
 
+  ngOnInit(): void {
+    if (!isPlatformBrowser(this.platformId)) {
+      return;
+    }
+
+    const oauthCode = this.route.snapshot.queryParamMap.get('oauth_code');
+
+    if (oauthCode) {
+      this.completeGoogleLogin(oauthCode);
+    }
+  }
+
   goToRegister(): void {
     void this.router.navigate(['/register']);
   }
@@ -62,6 +76,16 @@ export class LoginPageComponent {
     });
   }
 
+  loginWithGoogle(): void {
+    this.serverErrorState.set(null);
+
+    try {
+      this.authService.loginWithGoogle();
+    } catch (error: unknown) {
+      this.serverErrorState.set(this.resolveErrorMessage(error));
+    }
+  }
+
   protected updateEmail(value: string | number): void {
     this.form.controls.email.setValue(String(value));
   }
@@ -107,6 +131,22 @@ export class LoginPageComponent {
     this.document.location.assign(homeUrl);
   }
 
+  private completeGoogleLogin(oauthCode: string): void {
+    this.isSubmittingState.set(true);
+    this.serverErrorState.set(null);
+
+    this.authService.completeGoogleLogin(oauthCode).subscribe({
+      next: () => {
+        this.isSubmittingState.set(false);
+        this.redirectToHome();
+      },
+      error: (error: unknown) => {
+        this.isSubmittingState.set(false);
+        this.serverErrorState.set(this.resolveErrorMessage(error));
+      }
+    });
+  }
+
   private resolveErrorMessage(error: unknown): string {
     const errorPayload =
       typeof error === 'object' && error !== null && 'error' in error