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			443 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			443 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| const axios = require('axios')
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| const Path = require('path')
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| const ssrfFilter = require('ssrf-req-filter')
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| const exec = require('child_process').exec
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| const fs = require('../libs/fsExtra')
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| const rra = require('../libs/recursiveReaddirAsync')
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| const Logger = require('../Logger')
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| const { AudioMimeType } = require('./constants')
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| 
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| 
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| /**
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| * Make sure folder separator is POSIX for Windows file paths. e.g. "C:\Users\Abs" becomes "C:/Users/Abs"
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| *
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| * @param {String} path - Ugly file path
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| * @return {String} Pretty posix file path
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| */
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| const filePathToPOSIX = (path) => {
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|   if (!global.isWin || !path) return path
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|   return path.replace(/\\/g, '/')
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| }
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| module.exports.filePathToPOSIX = filePathToPOSIX
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| 
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| /**
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|  * Check path is a child of or equal to another path
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|  * 
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|  * @param {string} parentPath 
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|  * @param {string} childPath 
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|  * @returns {boolean}
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|  */
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| function isSameOrSubPath(parentPath, childPath) {
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|   parentPath = filePathToPOSIX(parentPath)
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|   childPath = filePathToPOSIX(childPath)
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|   if (parentPath === childPath) return true
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|   const relativePath = Path.relative(parentPath, childPath)
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|   return (
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|     relativePath === '' // Same path (e.g. parentPath = '/a/b/', childPath = '/a/b')
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|     || !relativePath.startsWith('..') && !Path.isAbsolute(relativePath) // Sub path
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|   )
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| }
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| module.exports.isSameOrSubPath = isSameOrSubPath
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| 
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| function getFileStat(path) {
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|   try {
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|     return fs.stat(path)
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|   } catch (err) {
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|     Logger.error('[fileUtils] Failed to stat', err)
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|     return null
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|   }
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| }
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| 
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| async function getFileTimestampsWithIno(path) {
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|   try {
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|     var stat = await fs.stat(path, { bigint: true })
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|     return {
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|       size: Number(stat.size),
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|       mtimeMs: Number(stat.mtimeMs),
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|       ctimeMs: Number(stat.ctimeMs),
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|       birthtimeMs: Number(stat.birthtimeMs),
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|       ino: String(stat.ino)
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|     }
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|   } catch (err) {
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|     Logger.error('[fileUtils] Failed to getFileTimestampsWithIno', err)
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|     return false
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|   }
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| }
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| module.exports.getFileTimestampsWithIno = getFileTimestampsWithIno
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| 
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| /**
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|  * Get file size
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|  * 
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|  * @param {string} path 
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|  * @returns {Promise<number>}
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|  */
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| module.exports.getFileSize = async (path) => {
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|   return (await getFileStat(path))?.size || 0
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| }
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| 
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| /**
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|  * Get file mtimeMs
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|  * 
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|  * @param {string} path 
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|  * @returns {Promise<number>} epoch timestamp
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|  */
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| module.exports.getFileMTimeMs = async (path) => {
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|   try {
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|     return (await getFileStat(path))?.mtimeMs || 0
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|   } catch (err) {
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|     Logger.error(`[fileUtils] Failed to getFileMtimeMs`, err)
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|     return 0
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|   }
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| }
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| 
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| /**
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|  * 
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|  * @param {string} filepath 
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|  * @returns {boolean}
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|  */
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| async function checkPathIsFile(filepath) {
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|   try {
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|     const stat = await fs.stat(filepath)
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|     return stat.isFile()
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|   } catch (err) {
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|     return false
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|   }
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| }
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| module.exports.checkPathIsFile = checkPathIsFile
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| 
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| function getIno(path) {
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|   return fs.stat(path, { bigint: true }).then((data => String(data.ino))).catch((err) => {
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|     Logger.error('[Utils] Failed to get ino for path', path, err)
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|     return null
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|   })
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| }
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| module.exports.getIno = getIno
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| 
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| /**
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|  * Read contents of file
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|  * @param {string} path 
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|  * @returns {string}
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|  */
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| async function readTextFile(path) {
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|   try {
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|     var data = await fs.readFile(path)
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|     return String(data)
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|   } catch (error) {
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|     Logger.error(`[FileUtils] ReadTextFile error ${error}`)
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|     return ''
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|   }
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| }
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| module.exports.readTextFile = readTextFile
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| 
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| function bytesPretty(bytes, decimals = 0) {
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|   if (bytes === 0) {
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|     return '0 Bytes'
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|   }
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|   const k = 1000
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|   var dm = decimals < 0 ? 0 : decimals
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|   const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
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|   const i = Math.floor(Math.log(bytes) / Math.log(k))
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|   if (i > 2 && dm === 0) dm = 1
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|   return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
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| }
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| module.exports.bytesPretty = bytesPretty
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| 
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| /**
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|  * Get array of files inside dir
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|  * @param {string} path 
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|  * @param {string} [relPathToReplace] 
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|  * @returns {{name:string, path:string, dirpath:string, reldirpath:string, fullpath:string, extension:string, deep:number}[]}
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|  */
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| async function recurseFiles(path, relPathToReplace = null) {
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|   path = filePathToPOSIX(path)
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|   if (!path.endsWith('/')) path = path + '/'
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| 
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|   if (relPathToReplace) {
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|     relPathToReplace = filePathToPOSIX(relPathToReplace)
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|     if (!relPathToReplace.endsWith('/')) relPathToReplace += '/'
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|   } else {
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|     relPathToReplace = path
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|   }
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| 
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|   const options = {
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|     mode: rra.LIST,
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|     recursive: true,
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|     stats: false,
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|     ignoreFolders: true,
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|     extensions: true,
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|     deep: true,
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|     realPath: true,
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|     normalizePath: true
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|   }
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|   let list = await rra.list(path, options)
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|   if (list.error) {
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|     Logger.error('[fileUtils] Recurse files error', list.error)
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|     return []
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|   }
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| 
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|   const directoriesToIgnore = []
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| 
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|   list = list.filter((item) => {
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|     if (item.error) {
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|       Logger.error(`[fileUtils] Recurse files file "${item.fullname}" has error`, item.error)
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|       return false
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|     }
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| 
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|     const relpath = item.fullname.replace(relPathToReplace, '')
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|     let reldirname = Path.dirname(relpath)
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|     if (reldirname === '.') reldirname = ''
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|     const dirname = Path.dirname(item.fullname)
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| 
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|     // Directory has a file named ".ignore" flag directory and ignore
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|     if (item.name === '.ignore' && reldirname && reldirname !== '.' && !directoriesToIgnore.includes(dirname)) {
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|       Logger.debug(`[fileUtils] .ignore found - ignoring directory "${reldirname}"`)
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|       directoriesToIgnore.push(dirname)
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|       return false
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|     }
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| 
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|     if (item.extension === '.part') {
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|       Logger.debug(`[fileUtils] Ignoring .part file "${relpath}"`)
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|       return false
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|     }
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| 
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|     // Ignore any file if a directory or the filename starts with "."
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|     if (relpath.split('/').find(p => p.startsWith('.'))) {
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|       Logger.debug(`[fileUtils] Ignoring path has . "${relpath}"`)
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|       return false
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|     }
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| 
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|     return true
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|   }).filter(item => {
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|     // Filter out items in ignore directories
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|     if (directoriesToIgnore.some(dir => item.fullname.startsWith(dir))) {
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|       Logger.debug(`[fileUtils] Ignoring path in dir with .ignore "${item.fullname}"`)
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|       return false
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|     }
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|     return true
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|   }).map((item) => {
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|     var isInRoot = (item.path + '/' === relPathToReplace)
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|     return {
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|       name: item.name,
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|       path: item.fullname.replace(relPathToReplace, ''),
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|       dirpath: item.path,
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|       reldirpath: isInRoot ? '' : item.path.replace(relPathToReplace, ''),
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|       fullpath: item.fullname,
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|       extension: item.extension,
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|       deep: item.deep
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|     }
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|   })
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| 
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|   // Sort from least deep to most
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|   list.sort((a, b) => a.deep - b.deep)
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| 
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|   return list
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| }
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| module.exports.recurseFiles = recurseFiles
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| 
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| /**
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|  * Download file from web to local file system
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|  * Uses SSRF filter to prevent internal URLs
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|  * 
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|  * @param {string} url 
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|  * @param {string} filepath path to download the file to
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|  * @param {Function} [contentTypeFilter] validate content type before writing
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|  * @returns {Promise}
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|  */
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| module.exports.downloadFile = (url, filepath, contentTypeFilter = null) => {
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|   return new Promise(async (resolve, reject) => {
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|     Logger.debug(`[fileUtils] Downloading file to ${filepath}`)
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|     axios({
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|       url,
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|       method: 'GET',
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|       responseType: 'stream',
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|       timeout: 30000,
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|       httpAgent: ssrfFilter(url),
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|       httpsAgent: ssrfFilter(url)
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|     }).then((response) => {
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|       // Validate content type
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|       if (contentTypeFilter && !contentTypeFilter?.(response.headers?.['content-type'])) {
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|         return reject(new Error(`Invalid content type "${response.headers?.['content-type'] || ''}"`))
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|       }
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| 
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|       // Write to filepath
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|       const writer = fs.createWriteStream(filepath)
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|       response.data.pipe(writer)
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| 
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|       writer.on('finish', resolve)
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|       writer.on('error', reject)
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|     }).catch((err) => {
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|       Logger.error(`[fileUtils] Failed to download file "${filepath}"`, err)
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|       reject(err)
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|     })
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|   })
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| }
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| 
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| /**
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|  * Download image file from web to local file system
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|  * Response header must have content-type of image/ (excluding svg)
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|  * 
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|  * @param {string} url 
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|  * @param {string} filepath 
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|  * @returns {Promise}
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|  */
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| module.exports.downloadImageFile = (url, filepath) => {
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|   const contentTypeFilter = (contentType) => {
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|     return contentType?.startsWith('image/') && contentType !== 'image/svg+xml'
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|   }
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|   return this.downloadFile(url, filepath, contentTypeFilter)
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| }
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| 
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| module.exports.sanitizeFilename = (filename, colonReplacement = ' - ') => {
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|   if (typeof filename !== 'string') {
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|     return false
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|   }
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| 
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|   // Most file systems use number of bytes for max filename
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|   //   to support most filesystems we will use max of 255 bytes in utf-16
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|   //   Ref: https://doc.owncloud.com/server/next/admin_manual/troubleshooting/path_filename_length.html
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|   //   Issue: https://github.com/advplyr/audiobookshelf/issues/1261
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|   const MAX_FILENAME_BYTES = 255
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| 
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|   const replacement = ''
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|   const illegalRe = /[\/\?<>\\:\*\|"]/g
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|   const controlRe = /[\x00-\x1f\x80-\x9f]/g
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|   const reservedRe = /^\.+$/
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|   const windowsReservedRe = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i
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|   const windowsTrailingRe = /[\. ]+$/
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|   const lineBreaks = /[\n\r]/g
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| 
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|   let sanitized = filename
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|     .replace(':', colonReplacement) // Replace first occurrence of a colon
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|     .replace(illegalRe, replacement)
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|     .replace(controlRe, replacement)
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|     .replace(reservedRe, replacement)
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|     .replace(lineBreaks, replacement)
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|     .replace(windowsReservedRe, replacement)
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|     .replace(windowsTrailingRe, replacement)
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|     .replace(/\s+/g, ' ') // Replace consecutive spaces with a single space
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| 
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|   // Check if basename is too many bytes
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|   const ext = Path.extname(sanitized) // separate out file extension
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|   const basename = Path.basename(sanitized, ext)
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|   const extByteLength = Buffer.byteLength(ext, 'utf16le')
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|   const basenameByteLength = Buffer.byteLength(basename, 'utf16le')
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|   if (basenameByteLength + extByteLength > MAX_FILENAME_BYTES) {
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|     const MaxBytesForBasename = MAX_FILENAME_BYTES - extByteLength
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|     let totalBytes = 0
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|     let trimmedBasename = ''
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| 
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|     // Add chars until max bytes is reached
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|     for (const char of basename) {
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|       totalBytes += Buffer.byteLength(char, 'utf16le')
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|       if (totalBytes > MaxBytesForBasename) break
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|       else trimmedBasename += char
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|     }
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| 
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|     trimmedBasename = trimmedBasename.trim()
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|     sanitized = trimmedBasename + ext
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|   }
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| 
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|   return sanitized
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| }
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| 
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| // Returns null if extname is not in our defined list of audio extnames
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| module.exports.getAudioMimeTypeFromExtname = (extname) => {
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|   if (!extname || !extname.length) return null
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|   const formatUpper = extname.slice(1).toUpperCase()
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|   if (AudioMimeType[formatUpper]) return AudioMimeType[formatUpper]
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|   return null
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| }
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| 
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| module.exports.removeFile = (path) => {
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|   if (!path) return false
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|   return fs.remove(path).then(() => true).catch((error) => {
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|     Logger.error(`[fileUtils] Failed remove file "${path}"`, error)
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|     return false
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|   })
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| }
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| 
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| module.exports.encodeUriPath = (path) => {
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|   const uri = new URL(path, "file://")
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|   return uri.pathname
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| }
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| 
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| /**
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|  * Check if directory is writable.
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|  * This method is necessary because fs.access(directory, fs.constants.W_OK) does not work on Windows
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|  * 
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|  * @param {string} directory 
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|  * @returns {boolean}
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|  */
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| module.exports.isWritable = async (directory) => {
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|   try {
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|     const accessTestFile = path.join(directory, 'accessTest')
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|     await fs.writeFile(accessTestFile, '')
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|     await fs.remove(accessTestFile)
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|     return true
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|   } catch (err) {
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|     return false
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|   }
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| }
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| 
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| /**
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|  * Get Windows drives as array e.g. ["C:/", "F:/"]
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|  * 
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|  * @returns {Promise<string[]>}
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|  */
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| module.exports.getWindowsDrives = async () => {
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|   if (!global.isWin) {
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|     return []
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|   }
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|   return new Promise((resolve, reject) => {
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|     exec('wmic logicaldisk get name', async (error, stdout, stderr) => {
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|       if (error) {
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|         reject(error)
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|         return
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|       }
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|       let drives = stdout?.split(/\r?\n/).map(line => line.trim()).filter(line => line).slice(1)
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|       const validDrives = []
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|       for (const drive of drives) {
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|         let drivepath = drive + '/'
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|         if (await fs.pathExists(drivepath)) {
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|           validDrives.push(drivepath)
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|         } else {
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|           Logger.error(`Invalid drive ${drivepath}`)
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|         }
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|       }
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|       resolve(validDrives)
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|     })
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|   })
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| }
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| 
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| /**
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|  * Get array of directory paths in a directory
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|  * 
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|  * @param {string} dirPath 
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|  * @param {number} level
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|  * @returns {Promise<{ path:string, dirname:string, level:number }[]>}
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|  */
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| module.exports.getDirectoriesInPath = async (dirPath, level) => {
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|   try {
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|     const paths = await fs.readdir(dirPath)
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|     let dirs = await Promise.all(paths.map(async dirname => {
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|       const fullPath = Path.join(dirPath, dirname)
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| 
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|       const lstat = await fs.lstat(fullPath).catch((error) => {
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|         Logger.debug(`Failed to lstat "${fullPath}"`, error)
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|         return null
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|       })
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|       if (!lstat?.isDirectory()) return null
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| 
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|       return {
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|         path: this.filePathToPOSIX(fullPath),
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|         dirname,
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|         level
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|       }
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|     }))
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|     dirs = dirs.filter(d => d)
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|     return dirs
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|   } catch (error) {
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|     Logger.error('Failed to readdir', dirPath, error)
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|     return []
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|   }
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| } |