fugitsit
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Small library that wraps ICAL.js and provide more convenient means for editing
81 lines (71 loc) • 1.81 kB
JavaScript
/**
* @copyright Copyright (c) 2019 Georg Ehrke
*
* @author Georg Ehrke <georg-nextcloud@ehrke.email>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
export default function observerTrait(baseClass) {
/**
* @class ObserverTrait
*/
return class extends baseClass {
/**
* Constructor
*/
constructor(...args) {
super(...args)
/**
* List of subscribers
*
* @type {Function[]}
* @private
*/
this._subscribers = []
}
/**
* Adds a new subscriber
*
* @param {Function} handler - Handler to be called when modification happens
*/
subscribe(handler) {
this._subscribers.push(handler)
}
/**
* Removes a subscriber
*
* @param {Function} handler - Handler to be no longer called when modification happens
*/
unsubscribe(handler) {
const index = this._subscribers.indexOf(handler)
if (index === -1) {
return
}
this._subscribers.splice(index, 1)
}
/**
* Notify all subscribed handlers
*
* @protected
*/
_notifySubscribers(...args) {
for (const handler of this._subscribers) {
handler(...args)
}
}
}
}