Feature: Make all event names exportable

[yvesgurcan]

Problem

Describe the problem related to this feature request.

Right now, the logic to process which events are sent by the player requires comparisons of the event names with a string or variables created by the user.

See the React example into this repository:

web-midi-player/example/react/src/components/Player.js

Lines 5 to 8 in 6ce4785

	const MIDI_PLAY = 'MIDI_PLAY';
	const MIDI_PAUSE = 'MIDI_PAUSE';
	const MIDI_END = 'MIDI_END';
	const MIDI_ERROR = 'MIDI_ERROR';

web-midi-player/example/react/src/components/Player.js

Line 135 in 6ce4785

if (payload.event === MIDI_ERROR) {

Strings like 'MIDI_PLAY' or 'MIDI_ERROR' have to be typed or created by the user instead of imported as variables from web-midi-player.

Solution

What solution do you suggest to solve this problem?

Export all event names so that comparing which events are being fired is easier. Something like this:

import MidiPlayer, { EVENTS } from 'web-midi-player';
const { MIDI_PLAY, MIDI_PAUSE, MIDI_STOP, MIDI_ERROR } = EVENTS;

const eventLogger = (payload) => {
  if (payload.event === MIDI_PLAY) {
    console.log('playing');
  }
};

const midiPlayer = new MidiPlayer({ eventLogger });
midiPlayer.play({ url: 'some_file.mid' });