const events = {

// eventName: [events]

};

const emitter = {

on: (event, fn) => {

if (typeof fn !== 'function') return emitter;

event.split(' ').forEach((e) => {

if (!events.hasOwnProperty(e)) { // eslint-disable-line no-prototype-builtins

events[e] = [];

}

events[e].push(fn);

});

return emitter;

},

emit: (event, data, cancelable = false) => {

const lEvents = events[event];

let ran = false;

let canceled = false;

if (Array.isArray(lEvents) && lEvents.length) {

ran = true;

lEvents.forEach(function call(ev) {

// Should we stop processing on cancel? Probably.

try {

const meta = { event, cancelable, canceled };

ev.call(meta, data);

canceled = !!meta.canceled;

} catch (e) {

console.error(`Error occurred while parsing event: ${ev.displayName || ev.name || 'unnamed'}(${event})`, e, data);

}

});

}

return {

ran,

canceled: cancelable && canceled,

};

},

emitJSON: (event, data, cancelable) => emitter.emit(event, JSON.parse(data), cancelable),

};

return emitter;