83 lines
1.8 KiB
JavaScript
83 lines
1.8 KiB
JavaScript
import storage from './storage'
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/**
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* 处理缓存数据
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*/
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export { storage }
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/**
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* 获取目录对象或文件对象
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* @param {string} url 要操作文件或目录的URL地址
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* @returns {Promise<object>} 若成功返回请求到的目录或文件对象，否则返回 null
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*/
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export function resolveFile(url) {
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return new Promise(resolve => {
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// #ifdef APP-PLUS
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plus.io.resolveLocalFileSystemURL(url, resolve, () => resolve(null))
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// #endif
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// #ifndef APP-PLUS
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resolve(null)
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// #endif
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})
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}
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/**
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* 获取目录大小
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* @param {string} dir 目录地址
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* @returns {Promise<number>} 返回目录大小，单位字节
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*/
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export function getDirSize(dir) {
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return new Promise(async resolve => {
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// #ifdef APP-PLUS
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const entry = await resolveFile(dir)
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if (!entry) return resolve(0)
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entry.getMetadata(
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res => resolve(res.size || 0),
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() => resolve(0),
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true
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)
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// #endif
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// #ifndef APP-PLUS
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resolve(0)
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// #endif
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})
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}
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/**
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* 删除目录
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* @param {string} dir 目录地址
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* @returns {Promise<boolean>} 删除状态
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*/
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export function removeDir(dir) {
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return new Promise(async resolve => {
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// #ifdef APP-PLUS
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const entry = await resolveFile(dir)
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if (!entry) return resolve(false)
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entry.removeRecursively(
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() => resolve(true),
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() => resolve(false)
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)
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// #endif
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// #ifndef APP-PLUS
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resolve(false)
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// #endif
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})
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}
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/**
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* 格式化字节大小
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* @param {number} size 字节大小
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* @returns {string} 格式化后的文字
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*/
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export function formatSize(size) {
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const s = parseInt(size)
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if (s === 0) return '0B'
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else if (s < 1024) return s + 'B'
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else if (s < 1048576) return (s / 1024).toFixed(2) + 'KB'
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else if (s < 1073741824) return (s / 1048576).toFixed(2) + 'MB'
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else return (s / 1073741824).toFixed(2) + 'GB'
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}
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