اضافه کردن PWA به وبسایت

const CACHE_NAME = 'web-tools-v1.0.0';
const urlsToCache = [
    '/',
    '/index.html',
    '/style.css',
    '/script.js',
    '/favicon.png',
    '/favicon.ico',
    '/manifest.json'
];

self.addEventListener('install', (event) => {
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then((cache) => {
                console.log('Opened cache');
                return cache.addAll(urlsToCache);
            })
    );
});

// Send message to all clients when new version is ready
self.addEventListener('activate', (event) => {
    const cacheWhitelist = [CACHE_NAME];

    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cacheName) => {
                    if (cacheWhitelist.indexOf(cacheName) === -1) {
                        return caches.delete(cacheName);
                    }
                })
            );
        }).then(() => {
            // Notify all clients about the update
            return self.clients.matchAll().then((clients) => {
                clients.forEach(client => {
                    client.postMessage({
                        type: 'SW_UPDATED',
                        message: 'نسخه جدید در دسترس است'
                    });
                });
            });
        })
    );

    return self.clients.claim();
});

// Listen for skip waiting message from page
self.addEventListener('message', (event) => {
    if (event.data && event.data.type === 'SKIP_WAITING') {
        self.skipWaiting();
    }
});

// Fetch and cache strategy
self.addEventListener('fetch', (event) => {
    event.respondWith(
        caches.match(event.request)
            .then((response) => {
                if (response) {
                    return response;
                }

                const fetchRequest = event.request.clone();

                return fetch(fetchRequest).then((response) => {
                    if (!response || response.status !== 200 || response.type !== 'basic') {
                        return response;
                    }

                    const responseToCache = response.clone();

                    caches.open(CACHE_NAME)
                        .then((cache) => {
                            cache.put(event.request, responseToCache);
                        });

                    return response;
                });
            })
    );
});

// Background sync event
self.addEventListener('sync', (event) => {
    if (event.tag === 'sync-data') {
        event.waitUntil(syncData());
    }
});

// Example function to sync data
async function syncData() {
    console.log('Syncing data...');
}

// Push notification event
self.addEventListener('push', (event) => {
    const options = {
        body: event.data ? event.data.text() : 'اعلان جدید',
        icon: '/favicon.png',
        badge: '/favicon.png',
        vibrate: [100, 50, 100],
        data: {
            dateOfArrival: Date.now(),
            primaryKey: 1
        }
    };

    event.waitUntil(
        self.registration.showNotification('ابزارهای وب', options)
    );
});

// Notification click event
self.addEventListener('notificationclick', (event) => {
    event.notification.close();

    event.waitUntil(
        clients.openWindow('/')
    );
});

// PWA Install Prompt
let deferredPrompt;
const installPromptDismissed = localStorage.getItem('installPromptDismissed');

window.addEventListener('beforeinstallprompt', (e) => {
    e.preventDefault();
    deferredPrompt = e;

    if (!installPromptDismissed) {
        showInstallPrompt();
    }
});

function showInstallPrompt() {
    const prompt = document.createElement('div');
    prompt.className = 'install-prompt';
    prompt.innerHTML = `
        <div class="install-prompt-text">
            <div class="install-prompt-title">📱 نصب اپلیکیشن</div>
        </div>
        <button class="install-btn" id="installBtn">نصب</button>
        <button class="close-install" id="closeInstall">✕</button>
    `;
    document.body.appendChild(prompt);

    document.getElementById('installBtn').addEventListener('click', async () => {
        if (!deferredPrompt) return;

        deferredPrompt.prompt();
        const {outcome} = await deferredPrompt.userChoice;

        if (outcome === 'accepted') {
            console.log('User accepted the install prompt');
        }

        deferredPrompt = null;
        prompt.remove();
    });

    document.getElementById('closeInstall').addEventListener('click', () => {
        localStorage.setItem('installPromptDismissed', 'true');
        prompt.remove();
    });
}

// Register Service Worker
if ('serviceWorker' in navigator) {
    let newWorker;

    window.addEventListener('load', () => {
        navigator.serviceWorker.register('/sw.js')
            .then(registration => {
                console.log('SW registered:', registration);

                // Check for updates periodically
                setInterval(() => {
                    registration.update();
                }, 60000); // Check every minute

                // Listen for waiting worker
                registration.addEventListener('updatefound', () => {
                    newWorker = registration.installing;

                    newWorker.addEventListener('statechange', () => {
                        if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
                            // New service worker is ready
                            showUpdateNotification();
                        }
                    });
                });
            })
            .catch(err => {
                console.log('SW registration failed:', err);
            });

        // Listen for messages from service worker
        navigator.serviceWorker.addEventListener('message', (event) => {
            if (event.data && event.data.type === 'SW_UPDATED') {
                showUpdateNotification();
            }
        });

        // Handle controller change
        navigator.serviceWorker.addEventListener('controllerchange', () => {
            window.location.reload();
        });
    });

    // Show update notification
    function showUpdateNotification() {
        const notification = document.getElementById('updateNotification');
        if (notification) {
            notification.classList.remove('hidden');
            notification.classList.add('show');
        }
    }

    // Handle update button click
    document.addEventListener('DOMContentLoaded', () => {
        const updateButton = document.getElementById('updateButton');
        const dismissButton = document.getElementById('dismissUpdate');
        const notification = document.getElementById('updateNotification');

        if (updateButton) {
            updateButton.addEventListener('click', () => {
                // Clear all caches and reload
                if ('caches' in window) {
                    caches.keys().then(names => {
                        names.forEach(name => {
                            caches.delete(name);
                        });
                    }).then(() => {
                        // Tell the service worker to skip waiting
                        if (newWorker) {
                            newWorker.postMessage({type: 'SKIP_WAITING'});
                        } else {
                            window.location.reload();
                        }
                    });
                } else {
                    window.location.reload();
                }
            });
        }

        if (dismissButton) {
            dismissButton.addEventListener('click', () => {
                notification.classList.remove('show');
                notification.classList.add('hidden');
            });
        }
    });
}

// Handle app installation
window.addEventListener('appinstalled', () => {
    console.log('App installed successfully');
    deferredPrompt = null;
});