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import React from 'react';
import PropTypes from 'prop-types';
import WaveSurfer from 'wavesurfer.js';
import { defineMessages, injectIntl } from 'react-intl';
import { formatTime } from 'flavours/glitch/features/video';
import Icon from 'flavours/glitch/components/icon';
import classNames from 'classnames';
import { throttle } from 'lodash';
const messages = defineMessages({
play: { id: 'video.play', defaultMessage: 'Play' },
pause: { id: 'video.pause', defaultMessage: 'Pause' },
mute: { id: 'video.mute', defaultMessage: 'Mute sound' },
unmute: { id: 'video.unmute', defaultMessage: 'Unmute sound' },
download: { id: 'video.download', defaultMessage: 'Download file' },
});
export default @injectIntl
class Audio extends React.PureComponent {
static propTypes = {
src: PropTypes.string.isRequired,
alt: PropTypes.string,
duration: PropTypes.number,
peaks: PropTypes.arrayOf(PropTypes.number),
height: PropTypes.number,
preload: PropTypes.bool,
editable: PropTypes.bool,
intl: PropTypes.object.isRequired,
};
state = {
currentTime: 0,
duration: null,
paused: true,
muted: false,
volume: 0.5,
};
// hard coded in components.scss
// any way to get ::before values programatically?
volWidth = 50;
volOffset = 70;
volHandleOffset = v => {
const offset = v * this.volWidth + this.volOffset;
return (offset > 110) ? 110 : offset;
}
setVolumeRef = c => {
this.volume = c;
}
setWaveformRef = c => {
this.waveform = c;
}
componentDidMount () {
if (this.waveform) {
this._updateWaveform();
}
}
componentDidUpdate (prevProps) {
if (this.waveform && prevProps.src !== this.props.src) {
this._updateWaveform();
}
}
componentWillUnmount () {
if (this.wavesurfer) {
this.wavesurfer.destroy();
this.wavesurfer = null;
}
}
_updateWaveform () {
const { src, height, duration, peaks, preload } = this.props;
const progressColor = window.getComputedStyle(document.querySelector('.audio-player__progress-placeholder')).getPropertyValue('background-color');
const waveColor = window.getComputedStyle(document.querySelector('.audio-player__wave-placeholder')).getPropertyValue('background-color');
if (this.wavesurfer) {
this.wavesurfer.destroy();
this.loaded = false;
}
const wavesurfer = WaveSurfer.create({
container: this.waveform,
height,
barWidth: 3,
cursorWidth: 0,
progressColor,
waveColor,
backend: 'MediaElement',
interact: preload,
});
wavesurfer.setVolume(this.state.volume);
if (preload) {
wavesurfer.load(src);
this.loaded = true;
} else {
wavesurfer.load(src, peaks, 'none', duration);
this.loaded = false;
}
wavesurfer.on('ready', () => this.setState({ duration: Math.floor(wavesurfer.getDuration()) }));
wavesurfer.on('audioprocess', () => this.setState({ currentTime: Math.floor(wavesurfer.getCurrentTime()) }));
wavesurfer.on('pause', () => this.setState({ paused: true }));
wavesurfer.on('play', () => this.setState({ paused: false }));
wavesurfer.on('volume', volume => this.setState({ volume }));
wavesurfer.on('mute', muted => this.setState({ muted }));
this.wavesurfer = wavesurfer;
}
togglePlay = () => {
if (this.state.paused) {
if (!this.props.preload && !this.loaded) {
this.wavesurfer.createBackend();
this.wavesurfer.createPeakCache();
this.wavesurfer.load(this.props.src);
this.wavesurfer.toggleInteraction();
this.loaded = true;
}
this.wavesurfer.play();
this.setState({ paused: false });
} else {
this.wavesurfer.pause();
this.setState({ paused: true });
}
}
toggleMute = () => {
this.wavesurfer.setMute(!this.state.muted);
}
handleVolumeMouseDown = e => {
document.addEventListener('mousemove', this.handleMouseVolSlide, true);
document.addEventListener('mouseup', this.handleVolumeMouseUp, true);
document.addEventListener('touchmove', this.handleMouseVolSlide, true);
document.addEventListener('touchend', this.handleVolumeMouseUp, true);
this.handleMouseVolSlide(e);
e.preventDefault();
e.stopPropagation();
}
handleVolumeMouseUp = () => {
document.removeEventListener('mousemove', this.handleMouseVolSlide, true);
document.removeEventListener('mouseup', this.handleVolumeMouseUp, true);
document.removeEventListener('touchmove', this.handleMouseVolSlide, true);
document.removeEventListener('touchend', this.handleVolumeMouseUp, true);
}
handleMouseVolSlide = throttle(e => {
const rect = this.volume.getBoundingClientRect();
const x = (e.clientX - rect.left) / this.volWidth; // x position within the element.
if(!isNaN(x)) {
let slideamt = x;
if (x > 1) {
slideamt = 1;
} else if(x < 0) {
slideamt = 0;
}
this.wavesurfer.setVolume(slideamt);
}
}, 60);
render () {
const { height, intl, alt, editable } = this.props;
const { paused, muted, volume, currentTime } = this.state;
const volumeWidth = muted ? 0 : volume * this.volWidth;
const volumeHandleLoc = muted ? this.volHandleOffset(0) : this.volHandleOffset(volume);
return (
<div className={classNames('audio-player', { editable })}>
<div className='audio-player__progress-placeholder' style={{ display: 'none' }} />
<div className='audio-player__wave-placeholder' style={{ display: 'none' }} />
<div
className='audio-player__waveform'
aria-label={alt}
title={alt}
style={{ height }}
ref={this.setWaveformRef}
/>
<div className='video-player__controls active'>
<div className='video-player__buttons-bar'>
<div className='video-player__buttons left'>
<button type='button' aria-label={intl.formatMessage(paused ? messages.play : messages.pause)} onClick={this.togglePlay}><Icon id={paused ? 'play' : 'pause'} fixedWidth /></button>
<button type='button' aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} onClick={this.toggleMute}><Icon id={muted ? 'volume-off' : 'volume-up'} fixedWidth /></button>
<div className='video-player__volume' onMouseDown={this.handleVolumeMouseDown} ref={this.setVolumeRef}>
<div className='video-player__volume__current' style={{ width: `${volumeWidth}px` }} />
<span
className={classNames('video-player__volume__handle')}
tabIndex='0'
style={{ left: `${volumeHandleLoc}px` }}
/>
</div>
<span>
<span className='video-player__time-current'>{formatTime(currentTime)}</span>
<span className='video-player__time-sep'>/</span>
<span className='video-player__time-total'>{formatTime(this.state.duration || Math.floor(this.props.duration))}</span>
</span>
</div>
<div className='video-player__buttons right'>
<button type='button' aria-label={intl.formatMessage(messages.download)}>
<a className='video-player__download__icon' href={this.props.src} download>
<Icon id={'download'} fixedWidth />
</a>
</button>
</div>
</div>
</div>
</div>
);
}
}
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