labo-components/app/util/Events.js

B&G UI components

/**
 * Events handler
 *
 * Inspired by microevent.js (MIT)
 * https://github.com/jeromeetienne/microevent.js
 */

const Events = function() {
    this._events = {};
    this._data = {};

    this.clear = () => {
        this._events = {};
        return this;
    };

    this.reset = event => {
        if (event in this._events === false) return this;
        delete this._events[event];
        return this;
    };

    this.bind = (event, fct) => {
        this._events[event] = this._events[event] || [];
        this._events[event].push(fct);
        return this;
    };

    this.getData = event => {
        return event in this._data === false ? null : this._data[event];
    };

    this.unbind = (event, fct) => {
        if (event in this._events === false) return this;
        this._events[event].splice(this._events[event].indexOf(fct), 1);
        return this;
    };

    this.trigger = (event, data) => {
        if (event in this._events === false) return this;

        // store data
        this._data[event] = data;

        // trigger all events
        for (let i = 0; i < this._events[event].length; i++) {
            this._events[event][i](data);
        }

        return this;
    };
};

export default Events;