fix(logout): enhance logout handling with success and error toasts

src/app/core/services/toast.service.spec.ts

@@ -1,3 +1,4 @@
+import { DOCUMENT } from '@angular/common';
 import { TestBed } from '@angular/core/testing';
 import { vi } from 'vitest';
 import { ToastService } from './toast.service';
@@ -6,14 +7,16 @@ describe('ToastService', () => {
   let service: ToastService;
 
   beforeEach(() => {
+    vi.useFakeTimers();
     TestBed.configureTestingModule({
       providers: [ToastService]
     });
+    TestBed.inject(DOCUMENT).defaultView?.sessionStorage.removeItem('shopit.pending-toast');
     service = TestBed.inject(ToastService);
-    vi.useFakeTimers();
   });
 
   afterEach(() => {
+    TestBed.inject(DOCUMENT).defaultView?.sessionStorage.removeItem('shopit.pending-toast');
     vi.useRealTimers();
   });
 
@@ -98,4 +101,23 @@ describe('ToastService', () => {
 
     expect(service.toasts().length).toBe(1);
   });
+
+  it('should restore a toast queued for after a full page reload', () => {
+    service.showAfterReload('Sesión iniciada correctamente.', 'success', 0);
+
+    TestBed.resetTestingModule();
+    TestBed.configureTestingModule({ providers: [ToastService] });
+    service = TestBed.inject(ToastService);
+
+    expect(service.toasts()).toEqual([
+      expect.objectContaining({
+        message: 'Sesión iniciada correctamente.',
+        type: 'success',
+        duration: 0,
+      }),
+    ]);
+    expect(
+      TestBed.inject(DOCUMENT).defaultView?.sessionStorage.getItem('shopit.pending-toast'),
+    ).toBeNull();
+  });
 });

src/app/core/services/toast.service.ts

@@ -1,4 +1,7 @@
-import { Injectable, signal } from '@angular/core';
+import { DOCUMENT, isPlatformBrowser } from '@angular/common';
+import { inject, Injectable, PLATFORM_ID, signal } from '@angular/core';
+
+const PENDING_TOAST_STORAGE_KEY = 'shopit.pending-toast';
 
 export interface Toast {
   id: string;
@@ -11,9 +14,15 @@ export interface Toast {
   providedIn: 'root'
 })
 export class ToastService {
+  private readonly document = inject(DOCUMENT);
+  private readonly platformId = inject(PLATFORM_ID);
   private readonly toastsSignal = signal<Toast[]>([]);
   readonly toasts = this.toastsSignal.asReadonly();
 
+  constructor() {
+    this.restorePendingToast();
+  }
+
   show(message: string, type: 'success' | 'danger' | 'info' = 'info', duration = 3000): string {
     const id = Math.random().toString(36).substring(2, 9);
     const newToast: Toast = { id, message, type, duration };
@@ -41,7 +50,50 @@ export class ToastService {
     return this.show(message, 'success', duration);
   }
 
+  showAfterReload(
+    message: string,
+    type: Toast['type'] = 'info',
+    duration = 3000,
+  ): void {
+    if (!isPlatformBrowser(this.platformId)) {
+      return;
+    }
+
+    this.document.defaultView?.sessionStorage.setItem(
+      PENDING_TOAST_STORAGE_KEY,
+      JSON.stringify({ message, type, duration }),
+    );
+  }
+
   dismiss(id: string): void {
     this.toastsSignal.update((toasts) => toasts.filter((t) => t.id !== id));
   }
+
+  private restorePendingToast(): void {
+    if (!isPlatformBrowser(this.platformId)) {
+      return;
+    }
+
+    const storage = this.document.defaultView?.sessionStorage;
+    const pendingToast = storage?.getItem(PENDING_TOAST_STORAGE_KEY);
+
+    if (!pendingToast) {
+      return;
+    }
+
+    storage?.removeItem(PENDING_TOAST_STORAGE_KEY);
+
+    try {
+      const parsed = JSON.parse(pendingToast) as Partial<Toast>;
+
+      if (
+        typeof parsed.message === 'string' &&
+        (parsed.type === 'success' || parsed.type === 'danger' || parsed.type === 'info')
+      ) {
+        this.show(parsed.message, parsed.type, parsed.duration);
+      }
+    } catch {
+      // Ignore malformed session data left by an older or interrupted client.
+    }
+  }
 }