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'use strict';
var notification_data = JSON.parse(document.getElementById('notification_data').textContent);
/** Boolean meaning 'some tab have stream' */
const STORAGE_KEY_STREAM = 'stream';
/** Number of notifications. May be increased or reset */
const STORAGE_KEY_NOTIF_COUNT = 'notification_count';
var notifications, delivered;
var notifications_mock = { close: function () { } };
function get_subscriptions() {
helpers.xhr('GET', '/api/v1/auth/subscriptions', {
retries: 5,
entity_name: 'subscriptions'
}, {
on200: create_notification_stream
});
}
function create_notification_stream(subscriptions) {
// sse.js can't be replaced to EventSource in place as it lack support of payload and headers
// see https://developer.mozilla.org/en-US/docs/Web/API/EventSource/EventSource
notifications = new SSE(
'/api/v1/auth/notifications', {
withCredentials: true,
payload: 'topics=' + subscriptions.map(function (subscription) { return subscription.authorId; }).join(','),
headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
});
delivered = [];
var start_time = Math.round(new Date() / 1000);
notifications.onmessage = function (event) {
if (!event.id) return;
var notification = JSON.parse(event.data);
console.info('Got notification:', notification);
// Ignore not actual and delivered notifications
if (start_time > notification.published || delivered.includes(notification.videoId)) return;
delivered.push(notification.videoId);
let notification_count = helpers.storage.get(STORAGE_KEY_NOTIF_COUNT) || 0;
notification_count++;
helpers.storage.set(STORAGE_KEY_NOTIF_COUNT, notification_count);
update_ticker_count();
// permission for notifications handled on settings page. JS handler is in handlers.js
if (window.Notification && Notification.permission === 'granted') {
var notification_text = notification.liveNow ? notification_data.live_now_text : notification_data.upload_text;
notification_text = notification_text.replace('`x`', notification.author);
var system_notification = new Notification(notification_text, {
body: notification.title,
icon: '/ggpht' + new URL(notification.authorThumbnails[2].url).pathname,
img: '/ggpht' + new URL(notification.authorThumbnails[4].url).pathname
});
system_notification.onclick = function (e) {
open('/watch?v=' + notification.videoId, '_blank');
};
}
};
notifications.addEventListener('error', function (e) {
console.warn('Something went wrong with notifications, trying to reconnect...');
notifications = notifications_mock;
setTimeout(get_subscriptions, 1000);
});
notifications.stream();
}
function update_ticker_count() {
var notification_ticker = document.getElementById('notification_ticker');
const notification_count = helpers.storage.get(STORAGE_KEY_STREAM);
if (notification_count > 0) {
notification_ticker.innerHTML =
'<span id="notification_count">' + notification_count + '</span> <i class="icon ion-ios-notifications"></i>';
} else {
notification_ticker.innerHTML =
'<i class="icon ion-ios-notifications-outline"></i>';
}
}
function start_stream_if_needed() {
// random wait for other tabs set 'stream' flag
setTimeout(function () {
if (!helpers.storage.get(STORAGE_KEY_STREAM)) {
// if no one set 'stream', set it by yourself and start stream
helpers.storage.set(STORAGE_KEY_STREAM, true);
notifications = notifications_mock;
get_subscriptions();
}
}, Math.random() * 1000 + 50); // [0.050 .. 1.050) second
}
addEventListener('storage', function (e) {
if (e.key === STORAGE_KEY_NOTIF_COUNT)
update_ticker_count();
// if 'stream' key was removed
if (e.key === STORAGE_KEY_STREAM && !helpers.storage.get(STORAGE_KEY_STREAM)) {
if (notifications) {
// restore it if we have active stream
helpers.storage.set(STORAGE_KEY_STREAM, true);
} else {
start_stream_if_needed();
}
}
});
addEventListener('load', function () {
var notification_count_el = document.getElementById('notification_count');
var notification_count = notification_count_el ? parseInt(notification_count_el.textContent) : 0;
helpers.storage.set(STORAGE_KEY_NOTIF_COUNT, notification_count);
if (helpers.storage.get(STORAGE_KEY_STREAM))
helpers.storage.remove(STORAGE_KEY_STREAM);
start_stream_if_needed();
});
addEventListener('unload', function () {
// let chance to other tabs to be a streamer via firing 'storage' event
if (notifications) helpers.storage.remove(STORAGE_KEY_STREAM);
});
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