118 lines
3.5 KiB
JavaScript
118 lines
3.5 KiB
JavaScript
import IndexedDB from './database.js'
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import { Button, List, ListItem } from './weigets.js'
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export default class MusicList {
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constructor() {
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this.EventListeners = {}
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this.ul = List({})
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this.list = []
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this.store = new IndexedDB('musicDatabase', 1, 'musicObjectStore')
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this.store.open().then(() => {
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this.store.getAll().then((data) => {
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this.list = data
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data.forEach(item => this.__add(item))
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})
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})
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document.body.appendChild(this.ul)
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// 添加音乐播放器
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this.audio = new Audio()
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this.audio.addEventListener('ended', () => {
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this.next()
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})
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//this.audio.addEventListener('timeupdate', () => {
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// console.log(this.audio.currentTime)
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//})
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// 添加音乐按钮
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const input = document.createElement('input')
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input.type = 'file'
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input.multiple = true
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input.accept = 'audio/*'
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input.onchange = event => {
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for (const file of event.target.files) {
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const id = 'music' + Date.now()
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const { name, size, type } = file
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const reader = new FileReader()
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reader.onload = async event => {
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const arrayBuffer = event.target.result
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this.add({ id, name, size, type, arrayBuffer })
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}
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reader.readAsArrayBuffer(file)
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}
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}
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document.body.appendChild(input)
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}
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// 仅添加UI
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__add(item) {
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const li = ListItem({
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id: item.id,
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innerText: `${item.name} - ${item.size} - ${item.type} - ${item.id}`,
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onclick: event => {
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event.stopPropagation()
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this.play(item)
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},
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children: [
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Button({
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innerText: '播放',
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onclick: event => {
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event.stopPropagation()
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this.play(item)
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}
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}),
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Button({
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innerText: '停止',
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onclick: event => {
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event.stopPropagation()
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this.stop(item.id)
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}
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}),
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Button({
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innerText: '移除',
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onclick: event => {
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event.stopPropagation()
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this.delete(item)
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}
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})
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]
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})
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this.ul.appendChild(li)
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}
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// 叠加数据(双方数据计数器上升)
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async push(item) {
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console.log('叠加数据:', item)
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}
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// 添加数据并添加UI
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add(item) {
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this.store.add(item)
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this.__add(item)
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}
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delete(item) {
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this.store.delete(item.id)
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this.ul.removeChild(this.ul.querySelector(`#${item.id}`))
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this.stop() // 停止播放
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}
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play(item) {
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this.audio.src = URL.createObjectURL(new Blob([item.arrayBuffer], { type: item.type }))
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this.audio.play()
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this._on('play', item)
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}
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stop() {
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this.audio.pause()
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this.audio.src = ''
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this._on('stop')
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}
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next() { }
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prev() { }
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// 添加回调函数
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on(name, callback) {
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this.EventListeners[name] = callback
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}
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// 执行回调函数
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_on(name, ...args) {
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if (this.EventListeners[name]) {
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this.EventListeners[name](...args)
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}
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}
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}
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