thelounge/client/service-worker.js
2018-07-06 15:38:57 +03:00

138 lines
3 KiB
JavaScript

// The Lounge - https://github.com/thelounge/thelounge
/* global clients */
"use strict";
const excludedPathsFromCache = /^(?:socket\.io|storage|uploads|cdn-cgi)\//;
self.addEventListener("install", function() {
self.skipWaiting();
});
self.addEventListener("activate", function(event) {
event.waitUntil(self.clients.claim());
});
self.addEventListener("fetch", function(event) {
if (event.request.method !== "GET") {
return;
}
const url = event.request.url;
const scope = self.registration.scope;
// Skip cross-origin requests
if (!url.startsWith(scope)) {
return;
}
const path = url.substring(scope.length);
// Skip ignored paths
if (excludedPathsFromCache.test(path)) {
return;
}
const uri = new URL(url);
uri.hash = "";
uri.search = "";
event.respondWith(networkOrCache(uri));
});
function networkOrCache(uri) {
return caches.open("thelounge").then(function(cache) {
// Despite the "no-cache" name, it is a conditional request if proper headers are set
return fetch(uri, {cache: "no-cache"})
.then(function(response) {
if (response.ok) {
return cache.put(uri, response.clone()).then(function() {
return response;
});
}
})
.catch(function() {
return cache.match(uri).then(function(matching) {
return matching || Promise.reject("request-not-in-cache");
});
});
});
}
self.addEventListener("message", function(event) {
showNotification(event, event.data);
});
self.addEventListener("push", function(event) {
if (!event.data) {
return;
}
showNotification(event, event.data.json());
});
function showNotification(event, payload) {
if (payload.type !== "notification") {
return;
}
// get current notification, close it, and draw new
event.waitUntil(
self.registration
.getNotifications({
tag: `chan-${payload.chanId}`,
})
.then((notifications) => {
for (const notification of notifications) {
notification.close();
}
return self.registration.showNotification(payload.title, {
tag: `chan-${payload.chanId}`,
badge: "img/icon-alerted-black-transparent-bg-72x72px.png",
icon: "img/icon-alerted-grey-bg-192x192px.png",
body: payload.body,
timestamp: payload.timestamp,
});
})
);
}
self.addEventListener("notificationclick", function(event) {
event.notification.close();
event.waitUntil(clients.matchAll({
includeUncontrolled: true,
type: "window",
}).then((clientList) => {
if (clientList.length === 0) {
if (clients.openWindow) {
return clients.openWindow(`.#${event.notification.tag}`);
}
return;
}
const client = findSuitableClient(clientList);
client.postMessage({
type: "open",
channel: event.notification.tag,
});
if ("focus" in client) {
client.focus();
}
}));
});
function findSuitableClient(clientList) {
for (let i = 0; i < clientList.length; i++) {
const client = clientList[i];
if (client.focused || client.visibilityState === "visible") {
return client;
}
}
return clientList[0];
}