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import { h, Component } from 'preact'
import { connect } from 'react-redux'
import actions from '../actions'
const image_types = {
'jpg': 'image/jpeg',
'jpeg': 'image/jpeg',
'png': 'image/png',
'gif': 'image/gif',
}
const audio_types = {
'wav': 'audio/wav',
'mp3': 'audio/mp3',
'flac': 'audio/flac',
'aiff': 'audio/aiff',
}
const video_types = {
'mp4': 'video/mp4',
}
const THROTTLE_FETCH_TIME = 200
class FileViewer extends Component {
state = {
loading: false,
stale: false,
buffer: {},
url: null,
}
componentDidMount(){
this.fetch()
}
componentDidUpdate(prevProps){
if (this.props.file !== prevProps.file) {
this.deferFetch()
}
}
componentWillUnmount(){
if (this.state.url) {
window.URL.revokeObjectURL(this.state.url)
}
}
deferFetch(){
clearTimeout(this.timeout)
this.timeout = setTimeout(() => {
this.fetch()
}, THROTTLE_FETCH_TIME)
}
fetch() {
const { file, path, thumbnail } = this.props
if (!file) return
if (this.state.loading) {
this.setState({ stale: true })
return
}
const fn = [path || file.path, file.name].join('/').replace('//','/')
const { tool: module } = this.props.app
this.setState({ buffer: null, loading: true })
if (thumbnail) {
// console.log('fetch thumbnail', fn)
const size = parseInt(thumbnail) || 200
actions.socket
.thumbnail({ module, fn, size })
.then(this.loadBuffer.bind(this))
} else {
// console.log('fetch file', fn)
actions.socket
.read_file({ module, fn })
.then(this.loadBuffer.bind(this))
}
}
loadBuffer(buffer) {
// console.log('fetched buffer', buffer)
const { name, buf } = buffer
const ext = extension(name)
if (this.state.url) {
window.URL.revokeObjectURL(this.state.url)
}
let url
if (buf) {
if (ext in image_types) {
url = getURLFor(buf, image_types[ext])
} else if (ext in audio_types) {
url = getURLFor(buf, audio_types[ext])
} else if (ext in video_types) {
url = getURLFor(buf, video_types[ext])
} else {
url = ab2str(buf)
}
}
const { stale } = this.state
this.setState({ ext, url, buffer, loading: false, stale: false, }, () => {
// console.log('loaded')
if (stale) {
// console.log('stale, fetching...')
this.fetch()
}
})
}
render() {
const { file } = this.props
if (!file) {
return <div className='fileViewer'></div>
}
const { loading, buffer, url, ext } = this.state
if (loading) {
return <div className='fileViewer'><span>Loading...</span></div>
}
const {
error,
name, path,
date, size,
buf,
} = buffer
if (error) {
return <div className='fileViewer'><span>{error}</span></div>
}
if (!name) {
return <div className='fileViewer'></div>
}
if (!buf || !url) {
return <div className='fileViewer'><span>File empty</span></div>
}
let tag;
if (ext in image_types) {
tag = <img src={url} />
} else if (ext in audio_types) {
tag = <audio src={url} controls autoplay />
} else if (ext in video_types) {
tag = <video src={url} controls autoplay />
} else {
tag = <div className='text'>{url}</div>
}
return (
<div className='fileViewer'>{tag}</div>
)
}
}
const getURLFor = (buf, type) => {
const arrayBufferView = new Uint8Array(buf)
const blob = new Blob([arrayBufferView], { type })
const urlCreator = window.URL || window.webkitURL
return urlCreator.createObjectURL(blob)
}
const ab2str = buf => String.fromCharCode.apply(null, new Uint8Array(buf))
const extension = fn => fn.split('.').slice(-1)[0].toLowerCase()
const mapStateToProps = state => ({
app: state.system.app,
})
export default connect(mapStateToProps)(FileViewer)
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