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const { URL, domainToUnicode } = require('url')
const CHAR_LOWERCASE_A = 97
const CHAR_LOWERCASE_Z = 122
const isWindows = process.platform === 'win32'
class ERR_INVALID_FILE_URL_HOST extends TypeError {
constructor (platform) {
super(`File URL host must be "localhost" or empty on ${platform}`)
this.code = 'ERR_INVALID_FILE_URL_HOST'
}
toString () {
return `${this.name} [${this.code}]: ${this.message}`
}
}
class ERR_INVALID_FILE_URL_PATH extends TypeError {
constructor (msg) {
super(`File URL path ${msg}`)
this.code = 'ERR_INVALID_FILE_URL_PATH'
}
toString () {
return `${this.name} [${this.code}]: ${this.message}`
}
}
class ERR_INVALID_ARG_TYPE extends TypeError {
constructor (name, actual) {
super(`The "${name}" argument must be one of type string or an instance of URL. Received type ${typeof actual} ${actual}`)
this.code = 'ERR_INVALID_ARG_TYPE'
}
toString () {
return `${this.name} [${this.code}]: ${this.message}`
}
}
class ERR_INVALID_URL_SCHEME extends TypeError {
constructor (expected) {
super(`The URL must be of scheme ${expected}`)
this.code = 'ERR_INVALID_URL_SCHEME'
}
toString () {
return `${this.name} [${this.code}]: ${this.message}`
}
}
const isURLInstance = (input) => {
return input != null && input.href && input.origin
}
const getPathFromURLWin32 = (url) => {
const hostname = url.hostname
let pathname = url.pathname
for (let n = 0; n < pathname.length; n++) {
if (pathname[n] === '%') {
const third = pathname.codePointAt(n + 2) | 0x20
if ((pathname[n + 1] === '2' && third === 102) ||
(pathname[n + 1] === '5' && third === 99)) {
throw new ERR_INVALID_FILE_URL_PATH('must not include encoded \\ or / characters')
}
}
}
pathname = pathname.replace(/\//g, '\\')
pathname = decodeURIComponent(pathname)
if (hostname !== '') {
return `\\\\${domainToUnicode(hostname)}${pathname}`
}
const letter = pathname.codePointAt(1) | 0x20
const sep = pathname[2]
if (letter < CHAR_LOWERCASE_A || letter > CHAR_LOWERCASE_Z ||
(sep !== ':')) {
throw new ERR_INVALID_FILE_URL_PATH('must be absolute')
}
return pathname.slice(1)
}
const getPathFromURLPosix = (url) => {
if (url.hostname !== '') {
throw new ERR_INVALID_FILE_URL_HOST(process.platform)
}
const pathname = url.pathname
for (let n = 0; n < pathname.length; n++) {
if (pathname[n] === '%') {
const third = pathname.codePointAt(n + 2) | 0x20
if (pathname[n + 1] === '2' && third === 102) {
throw new ERR_INVALID_FILE_URL_PATH('must not include encoded / characters')
}
}
}
return decodeURIComponent(pathname)
}
const fileURLToPath = (path) => {
if (typeof path === 'string') {
path = new URL(path)
} else if (!isURLInstance(path)) {
throw new ERR_INVALID_ARG_TYPE('path', ['string', 'URL'], path)
}
if (path.protocol !== 'file:') {
throw new ERR_INVALID_URL_SCHEME('file')
}
return isWindows
? getPathFromURLWin32(path)
: getPathFromURLPosix(path)
}
module.exports = fileURLToPath
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