var state = "from_scope"; var resolvePromiseCallback; self.onfetch = function (event) { if (event.request.url.includes("lifetime_frame.html")) { event.respondWith(new Response("iframe_lifetime")); return; } var currentState = state; event.waitUntil( self.clients.matchAll().then(clients => { clients.forEach(client => { client.postMessage({ type: "fetch", state: currentState }); }); }) ); if (event.request.url.includes("update")) { state = "update"; } else if (event.request.url.includes("wait")) { event.respondWith( new Promise(function (res) { if (resolvePromiseCallback) { dump("ERROR: service worker was already waiting on a promise.\n"); } resolvePromiseCallback = function () { res(new Response("resolve_respondWithPromise")); }; }) ); state = "wait"; } else if (event.request.url.includes("release")) { state = "release"; resolvePromise(); } }; function resolvePromise() { if (resolvePromiseCallback === undefined || resolvePromiseCallback == null) { dump("ERROR: wait promise was not set.\n"); return; } resolvePromiseCallback(); resolvePromiseCallback = null; } self.onmessage = function (event) { var lastState = state; state = event.data; if (state === "wait") { event.waitUntil( new Promise(function (res) { if (resolvePromiseCallback) { dump("ERROR: service worker was already waiting on a promise.\n"); } resolvePromiseCallback = res; }) ); } else if (state === "release") { resolvePromise(); } event.source.postMessage({ type: "message", state: lastState }); }; self.onpush = function (event) { var pushResolve; event.waitUntil( new Promise(function (resolve) { pushResolve = resolve; }) ); // FIXME(catalinb): push message carry no data. So we assume the only // push message we get is "wait" self.clients.matchAll().then(function (client) { if (!client.length) { dump("ERROR: no clients to send the response to.\n"); } client[0].postMessage({ type: "push", state }); state = "wait"; if (resolvePromiseCallback) { dump("ERROR: service worker was already waiting on a promise.\n"); } else { resolvePromiseCallback = pushResolve; } }); };