64 lines
1.6 KiB
JavaScript
64 lines
1.6 KiB
JavaScript
'use strict';
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let pendingMessages = new Map();
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let listeners = new Map();
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function unlisten(messageClass) {
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listeners.set(messageClass, []);
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}
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function listen(messageClass, handler) {
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if (pendingMessages.has(messageClass)) {
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let newPendingMessages = [];
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for (let message of pendingMessages.get(messageClass)) {
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if (!handler(message)) {
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newPendingMessages.push(message);
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}
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}
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pendingMessages.set(messageClass, newPendingMessages);
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}
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if (!listeners.has(messageClass)) {
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listeners.set(messageClass, []);
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}
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listeners.get(messageClass).push(handler);
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}
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function notify(messageClass, message) {
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if (!listeners.has(messageClass) || !listeners.get(messageClass).length) {
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if (!pendingMessages.has(messageClass)) {
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pendingMessages.set(messageClass, []);
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}
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pendingMessages.get(messageClass).push(message);
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return;
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}
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for (let handler of listeners.get(messageClass)) {
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handler(message);
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}
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}
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class EventTarget {
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constructor() {
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this.eventTarget = document.createDocumentFragment();
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for (let method of [
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'addEventListener',
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'dispatchEvent',
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'removeEventListener'
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]) {
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this[method] = this.eventTarget[method].bind(this.eventTarget);
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}
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}
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};
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module.exports = {
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Success: 'success',
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Error: 'error',
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Info: 'info',
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Authentication: 'auth',
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SettingsChange: 'settings-change',
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TagsChange: 'tags-change',
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notify: notify,
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listen: listen,
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unlisten: unlisten,
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EventTarget: EventTarget,
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};
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