/* eslint-disable no-underscore-dangle */
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export default {
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on(events, handler, priority) {
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const self = this;
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if (typeof handler !== 'function') return self;
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const method = priority ? 'unshift' : 'push';
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events.split(' ').forEach(event => {
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if (!self.eventsListeners[event]) self.eventsListeners[event] = [];
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self.eventsListeners[event][method](handler);
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});
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return self;
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},
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once(events, handler, priority) {
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const self = this;
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if (typeof handler !== 'function') return self;
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function onceHandler(...args) {
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self.off(events, onceHandler);
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if (onceHandler.__emitterProxy) {
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delete onceHandler.__emitterProxy;
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}
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handler.apply(self, args);
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}
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onceHandler.__emitterProxy = handler;
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return self.on(events, onceHandler, priority);
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},
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onAny(handler, priority) {
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const self = this;
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if (typeof handler !== 'function') return self;
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const method = priority ? 'unshift' : 'push';
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if (self.eventsAnyListeners.indexOf(handler) < 0) {
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self.eventsAnyListeners[method](handler);
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}
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return self;
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},
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offAny(handler) {
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const self = this;
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if (!self.eventsAnyListeners) return self;
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const index = self.eventsAnyListeners.indexOf(handler);
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if (index >= 0) {
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self.eventsAnyListeners.splice(index, 1);
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}
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return self;
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},
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off(events, handler) {
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const self = this;
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if (!self.eventsListeners) return self;
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events.split(' ').forEach(event => {
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// self.native.off(event, handler);
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if (typeof handler === 'undefined') {
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self.eventsListeners[event] = [];
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} else if (self.eventsListeners[event]) {
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self.eventsListeners[event].forEach((eventHandler, index) => {
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if (eventHandler === handler || eventHandler.__emitterProxy && eventHandler
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.__emitterProxy === handler) {
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self.eventsListeners[event].splice(index, 1);
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}
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});
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}
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});
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return self;
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},
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emit(...args) {
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const self = this;
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if (!self.eventsListeners) return self;
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let events;
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let data;
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let context;
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if (typeof args[0] === 'string' || Array.isArray(args[0])) {
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events = args[0];
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data = args.slice(1, args.length);
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context = self;
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} else {
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events = args[0].events;
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data = args[0].data;
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context = args[0].context || self;
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}
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data.unshift(context);
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const eventsArray = Array.isArray(events) ? events : events.split(' ');
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eventsArray.forEach(event => {
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// console.log(event)
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if (self.eventsAnyListeners && self.eventsAnyListeners.length) {
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self.eventsAnyListeners.forEach(eventHandler => {
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eventHandler.apply(context, [event, ...data]);
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});
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}
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if (self.eventsListeners && self.eventsListeners[event]) {
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self.eventsListeners[event].forEach(eventHandler => {
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eventHandler.apply(context, data);
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});
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}
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});
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return self;
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}
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};
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