var data = [
  ["I","./index.html",21120910],
  ["L","./数据列表.js",2],
  ["B","./基础_良良.js",22010922],
  ["A","./UA_良良.js",21110215],
  ["C","./电脑_良良.js",21031415],
  ["Q","./快应用_良良.js",21031415],
  ["S","./爬虫_良良.js",21031415],
  ["T","./indexSidebar.js",4],
  ["O","../favicon.ico",2],
  ["D","./",21120910],
];

self.addEventListener('install', function(event) {
  event.waitUntil(
    data.map( d => {
      caches.open(`${d[0]}_${d[2]}`).then( cache => cache.add(d[1]) );
    })
  );
});

self.addEventListener('activate', function(event) {
  event.waitUntil(
    caches.keys().then( cacheNames => {
      return Promise.all(
        cacheNames.map( cacheName => {
          data.map( d => {
            if (cacheName.slice(0,1) == d[0] && parseInt(cacheName.slice(2)) < d[2]) {
              return caches.delete(cacheName);
            }
          });
        })
      );
    })
  );
});

self.addEventListener('fetch', function(event) {
  function cacheData(req,resp) {
    data.map ( d => {
      if ('.' + /\/+\w+\.+\w+$/.exec(req.url) == d[1]) {
        caches.open(`${d[0]}_${d[2]}`).then( cache => cache.put(req,resp) );
      }
    });
  }
  
  event.respondWith(caches.match(event.request).then( response => {
	if (response) {
	  cacheData(event.request, response);
	  return response.clone();
	}
    return fetch(event.request).then( response => response );
  }));
});