From 65f65d93f468dac153abcf2a22aa2f4f05821a0d2141407f19e3d52ffb9cc9cf Mon Sep 17 00:00:00 2001
From: Vladislav <ozerow.vlad2018@yandex.ru>
Date: Tue, 30 Jun 2026 19:13:51 -0400
Subject: [PATCH] =?UTF-8?q?Bot=20commit:=20=D0=94=D0=BE=D0=B1=D0=B0=D0=B2?=
 =?UTF-8?q?=D0=BB=D0=B5=D0=BD=20=D1=84=D0=B0=D0=B9=D0=BB=20static/service-?=
 =?UTF-8?q?worker.js?=
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---
 static/service-worker.js | 177 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100644 static/service-worker.js

diff --git a/static/service-worker.js b/static/service-worker.js
new file mode 100644
index 0000000..1395521
--- /dev/null
+++ b/static/service-worker.js
@@ -0,0 +1,177 @@
+const CACHE_NAME = 'app-cache-v2.1.4';
+
+const ASSETS_TO_CACHE = [
+    '/pwa2',
+    '/icon-192x192.png',
+    '/icon-512x512.png',
+    '/offline.html',
+    '/static/Inter-Bold.woff2',
+    '/static/Inter-SemiBold.woff2',
+    '/static/Inter-Regular.woff2',
+    '/static/painter.svg',
+    '/static/event1.jpg',
+    '/static/event2.jpg',
+    '/static/event3.jpg',
+    '/static/event4.jpg',
+    '/static/event5.jpg',
+    '/static/event6.jpg',
+    '/static/event7.webp',
+];
+const MIN_VALID_SIZE = 500;
+
+const NOCACHE_PATHS = [
+    '/api',
+    '/form',
+    '/profile',
+    '/competitions',
+    '/competition',
+    '/exhibitions',
+    '/exhibition',
+    '/login',
+    '/registration'
+];
+
+const VALIDATE_ON_MODIFY_PATHS = [
+    '/artists',
+    '/partner',
+    '/news',
+    '/',
+    '/pwa',
+    '/paintings',
+    
+];
+
+self.addEventListener('install', (e) => {
+    e.waitUntil(
+        caches.open(CACHE_NAME).then((cache) => {
+            console.log('Caching static assets...');
+            return cache.addAll(ASSETS_TO_CACHE);
+        })
+        .then(() => {
+            console.log('All assets cached successfully.');
+            return self.skipWaiting();
+        })
+        .catch((error) => {
+            console.error('Failed to cache assets during install:', error);
+        })
+    );
+});
+
+self.addEventListener('activate', (e) => {
+    e.waitUntil(
+        caches.keys().then((keys) =>
+            Promise.all(
+                keys.map((key) => {
+                    if (key !== CACHE_NAME) {
+                        console.log(`Deleting old cache: ${key}`);
+                        return caches.delete(key);
+                    }
+                })
+            )
+        )
+        .then(() => {
+            console.log('Service Worker activated.');
+            return self.clients.claim();
+        })
+        .then(() => {
+            return self.clients.matchAll().then((clients) => {
+                clients.forEach((client) => 
+                    client.postMessage({ type: 'SW_UPDATED' })
+                );
+            });
+        })
+    );
+});
+self.addEventListener('fetch', (e) => {
+    if (e.request.method !== 'GET') return;
+
+    const url = new URL(e.request.url);
+
+    if (NOCACHE_PATHS.some(path => 
+        url.pathname === path || url.pathname.startsWith(path + '/')
+    )) {
+        return;
+    }
+
+    e.respondWith(
+        (async () => {
+            const cache = await caches.open(CACHE_NAME);
+            const cachedResponse = await caches.match(e.request);
+
+            const shouldValidate = VALIDATE_ON_MODIFY_PATHS.some(path => 
+                url.pathname === path || url.pathname.startsWith(path + '/')
+            );
+
+            let isCachedTooSmall = false;
+            if (cachedResponse) {
+                const contentLength = parseInt(cachedResponse.headers.get('Content-Length') || '0', 10);
+                isCachedTooSmall = contentLength > 0 && contentLength < MIN_VALID_SIZE;
+            }
+
+            if (cachedResponse && !shouldValidate && !isCachedTooSmall) {
+                return cachedResponse;
+            }
+
+            try {
+                const networkResponse = await fetch(e.request);
+
+                if (networkResponse && networkResponse.status === 200) {
+                    const responseClone = networkResponse.clone();
+
+                    let shouldUpdateCache = true;
+
+                    if (shouldValidate && cachedResponse) {
+                        const [cachedModified, netModified] = await Promise.all([
+                            cachedResponse.headers.get('Last-Modified'),
+                            networkResponse.headers.get('Last-Modified')
+                        ]);
+
+                        const [cachedLen, netLen] = await Promise.all([
+                            cachedResponse.headers.get('Content-Length'),
+                            networkResponse.headers.get('Content-Length')
+                        ]);
+
+                        if (cachedModified === netModified && cachedLen === netLen) {
+                            shouldUpdateCache = false;
+                            console.log(`Content unchanged for ${url.pathname}, keeping cached version`);
+                        }
+                    }
+
+                    if (isCachedTooSmall) {
+                        console.warn(`Cached file ${url.pathname} was too small (${cachedResponse.headers.get('Content-Length')} bytes). Forcing update.`);
+                        shouldUpdateCache = true;
+                    }
+
+                    if (shouldUpdateCache) {
+                        console.log(`Caching/updating: ${url.pathname}`);
+                        await cache.put(e.request, responseClone);
+                    }
+
+                    return networkResponse;
+                }
+
+                if (cachedResponse) return cachedResponse;
+
+                throw new Error('Network response was not ok');
+
+            } catch (err) {
+                console.error('Fetch failed:', err);
+
+                if (e.request.mode === 'navigate') {
+                    const offlinePage = await caches.match('/offline.html');
+                    if (offlinePage) return offlinePage;
+
+                    const rootPage = await caches.match('/');
+                    if (rootPage) return rootPage;
+                }
+
+                if (cachedResponse) {
+                    console.warn(`Returning cached response despite small size due to offline state: ${url.pathname}`);
+                    return cachedResponse;
+                }
+
+                throw err;
+            }
+        })()
+    );
+});
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