58 lines
1.7 KiB
JavaScript
58 lines
1.7 KiB
JavaScript
import api from "./Api";
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import subscriptionManager from "./SubscriptionManager";
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const delayMillis = 3000; // 3 seconds
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const intervalMillis = 300000; // 5 minutes
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class Poller {
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constructor() {
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this.timer = null;
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}
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startWorker() {
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if (this.timer !== null) {
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return;
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}
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this.timer = setInterval(() => this.pollAll(), intervalMillis);
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setTimeout(() => this.pollAll(), delayMillis);
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}
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async pollAll() {
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console.log(`[Poller] Polling all subscriptions`);
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const subscriptions = await subscriptionManager.all();
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for (const s of subscriptions) {
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try {
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await this.poll(s);
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} catch (e) {
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console.log(`[Poller] Error polling ${s.id}`, e);
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}
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}
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}
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async poll(subscription) {
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console.log(`[Poller] Polling ${subscription.id}`);
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const since = subscription.last;
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const notifications = await api.poll(subscription.baseUrl, subscription.topic, since);
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if (!notifications || notifications.length === 0) {
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console.log(`[Poller] No new notifications found for ${subscription.id}`);
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return;
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}
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console.log(`[Poller] Adding ${notifications.length} notification(s) for ${subscription.id}`);
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await subscriptionManager.addNotifications(subscription.id, notifications);
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}
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pollInBackground(subscription) {
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const fn = async () => {
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try {
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await this.poll(subscription);
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} catch (e) {
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console.error(`[App] Error polling subscription ${subscription.id}`, e);
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}
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};
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setTimeout(() => fn(), 0);
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}
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}
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const poller = new Poller();
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export default poller;
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