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Add EventSource support (#11235)

Browse Source 
If the browser supports EventSource switch to use this instead of
polling notifications.

Signed-off-by: Andrew Thornton art27@cantab.net
This commit is contained in:
zeripath
2020-05-07 22:49:00 +01:00
committed by GitHub
parent 486e4c8087
commit 791353c03b
17 changed files with 676 additions and 27 deletions
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59
web_src/js/features/notification.js
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@@ -19,21 +19,53 @@ export function initNotificationsTable() {
}
export function initNotificationCount() {
const notificationCount = $('.notification_count');
if (!notificationCount.length) {
return;
}
if (NotificationSettings.EventSourceUpdateTime > 0 && !!window.EventSource) {
// Try to connect to the event source first
const source = new EventSource(`${AppSubUrl}/user/events`);
source.addEventListener('notification-count', async (e) => {
try {
const data = JSON.parse(e.data);
const notificationCount = $('.notification_count');
if (data.Count === 0) {
notificationCount.addClass('hidden');
} else {
notificationCount.removeClass('hidden');
}
notificationCount.text(`${data.Count}`);
await updateNotificationTable();
} catch (error) {
console.error(error);
}
});
source.addEventListener('logout', async (e) => {
if (e.data !== 'here') {
return;
}
source.close();
window.location.href = AppSubUrl;
});
return;
}
if (NotificationSettings.MinTimeout <= 0) {
return;
}
const notificationCount = $('.notification_count');
const fn = (timeout, lastCount) => {
setTimeout(async () => {
await updateNotificationCountWithCallback(fn, timeout, lastCount);
}, timeout);
};
if (notificationCount.length > 0) {
const fn = (timeout, lastCount) => {
setTimeout(async () => {
await updateNotificationCountWithCallback(fn, timeout, lastCount);
}, timeout);
};
fn(NotificationSettings.MinTimeout, notificationCount.text());
}
fn(NotificationSettings.MinTimeout, notificationCount.text());
}
async function updateNotificationCountWithCallback(callback, timeout, lastCount) {
@@ -54,9 +86,14 @@ async function updateNotificationCountWithCallback(callback, timeout, lastCount)
}
callback(timeout, newCount);
if (needsUpdate) {
await updateNotificationTable();
}
}
async function updateNotificationTable() {
const notificationDiv = $('#notification_div');
if (notificationDiv.length > 0 && needsUpdate) {
if (notificationDiv.length > 0) {
const data = await $.ajax({
type: 'GET',
url: `${AppSubUrl}/notifications?${notificationDiv.data('params')}`,