luhn-generator
Version:
A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm
343 lines (303 loc) • 8.9 kB
JavaScript
var sourceMappingURL = require("source-map-url")
var resolveUrl = require("./resolve-url")
var decodeUriComponent = require("./decode-uri-component")
var urix = require("urix")
var atob = require("atob")
function callbackAsync(callback, error, result) {
setImmediate(function() { callback(error, result) })
}
function parseMapToJSON(string, data) {
try {
return JSON.parse(string.replace(/^\)\]\}'/, ""))
} catch (error) {
error.sourceMapData = data
throw error
}
}
function readSync(read, url, data) {
var readUrl = decodeUriComponent(url)
try {
return String(read(readUrl))
} catch (error) {
error.sourceMapData = data
throw error
}
}
function resolveSourceMap(code, codeUrl, read, callback) {
var mapData
try {
mapData = resolveSourceMapHelper(code, codeUrl)
} catch (error) {
return callbackAsync(callback, error)
}
if (!mapData || mapData.map) {
return callbackAsync(callback, null, mapData)
}
var readUrl = decodeUriComponent(mapData.url)
read(readUrl, function(error, result) {
if (error) {
error.sourceMapData = mapData
return callback(error)
}
mapData.map = String(result)
try {
mapData.map = parseMapToJSON(mapData.map, mapData)
} catch (error) {
return callback(error)
}
callback(null, mapData)
})
}
function resolveSourceMapSync(code, codeUrl, read) {
var mapData = resolveSourceMapHelper(code, codeUrl)
if (!mapData || mapData.map) {
return mapData
}
mapData.map = readSync(read, mapData.url, mapData)
mapData.map = parseMapToJSON(mapData.map, mapData)
return mapData
}
var dataUriRegex = /^data:([^,;]*)(;[^,;]*)*(?:,(.*))?$/
/**
* The media type for JSON text is application/json.
*
* {@link https://tools.ietf.org/html/rfc8259#section-11 | IANA Considerations }
*
* `text/json` is non-standard media type
*/
var jsonMimeTypeRegex = /^(?:application|text)\/json$/
/**
* JSON text exchanged between systems that are not part of a closed ecosystem
* MUST be encoded using UTF-8.
*
* {@link https://tools.ietf.org/html/rfc8259#section-8.1 | Character Encoding}
*/
var jsonCharacterEncoding = "utf-8"
function base64ToBuf(b64) {
var binStr = atob(b64)
var len = binStr.length
var arr = new Uint8Array(len)
for (var i = 0; i < len; i++) {
arr[i] = binStr.charCodeAt(i)
}
return arr
}
function decodeBase64String(b64) {
if (typeof TextDecoder === "undefined" || typeof Uint8Array === "undefined") {
return atob(b64)
}
var buf = base64ToBuf(b64);
// Note: `decoder.decode` method will throw a `DOMException` with the
// `"EncodingError"` value when an coding error is found.
var decoder = new TextDecoder(jsonCharacterEncoding, {fatal: true})
return decoder.decode(buf);
}
function resolveSourceMapHelper(code, codeUrl) {
codeUrl = urix(codeUrl)
var url = sourceMappingURL.getFrom(code)
if (!url) {
return null
}
var dataUri = url.match(dataUriRegex)
if (dataUri) {
var mimeType = dataUri[1] || "text/plain"
var lastParameter = dataUri[2] || ""
var encoded = dataUri[3] || ""
var data = {
sourceMappingURL: url,
url: null,
sourcesRelativeTo: codeUrl,
map: encoded
}
if (!jsonMimeTypeRegex.test(mimeType)) {
var error = new Error("Unuseful data uri mime type: " + mimeType)
error.sourceMapData = data
throw error
}
try {
data.map = parseMapToJSON(
lastParameter === ";base64" ? decodeBase64String(encoded) : decodeURIComponent(encoded),
data
)
} catch (error) {
error.sourceMapData = data
throw error
}
return data
}
var mapUrl = resolveUrl(codeUrl, url)
return {
sourceMappingURL: url,
url: mapUrl,
sourcesRelativeTo: mapUrl,
map: null
}
}
function resolveSources(map, mapUrl, read, options, callback) {
if (typeof options === "function") {
callback = options
options = {}
}
var pending = map.sources ? map.sources.length : 0
var result = {
sourcesResolved: [],
sourcesContent: []
}
if (pending === 0) {
callbackAsync(callback, null, result)
return
}
var done = function() {
pending--
if (pending === 0) {
callback(null, result)
}
}
resolveSourcesHelper(map, mapUrl, options, function(fullUrl, sourceContent, index) {
result.sourcesResolved[index] = fullUrl
if (typeof sourceContent === "string") {
result.sourcesContent[index] = sourceContent
callbackAsync(done, null)
} else {
var readUrl = decodeUriComponent(fullUrl)
read(readUrl, function(error, source) {
result.sourcesContent[index] = error ? error : String(source)
done()
})
}
})
}
function resolveSourcesSync(map, mapUrl, read, options) {
var result = {
sourcesResolved: [],
sourcesContent: []
}
if (!map.sources || map.sources.length === 0) {
return result
}
resolveSourcesHelper(map, mapUrl, options, function(fullUrl, sourceContent, index) {
result.sourcesResolved[index] = fullUrl
if (read !== null) {
if (typeof sourceContent === "string") {
result.sourcesContent[index] = sourceContent
} else {
var readUrl = decodeUriComponent(fullUrl)
try {
result.sourcesContent[index] = String(read(readUrl))
} catch (error) {
result.sourcesContent[index] = error
}
}
}
})
return result
}
var endingSlash = /\/?$/
function resolveSourcesHelper(map, mapUrl, options, fn) {
options = options || {}
mapUrl = urix(mapUrl)
var fullUrl
var sourceContent
var sourceRoot
for (var index = 0, len = map.sources.length; index < len; index++) {
sourceRoot = null
if (typeof options.sourceRoot === "string") {
sourceRoot = options.sourceRoot
} else if (typeof map.sourceRoot === "string" && options.sourceRoot !== false) {
sourceRoot = map.sourceRoot
}
// If the sourceRoot is the empty string, it is equivalent to not setting
// the property at all.
if (sourceRoot === null || sourceRoot === '') {
fullUrl = resolveUrl(mapUrl, map.sources[index])
} else {
// Make sure that the sourceRoot ends with a slash, so that `/scripts/subdir` becomes
// `/scripts/subdir/<source>`, not `/scripts/<source>`. Pointing to a file as source root
// does not make sense.
fullUrl = resolveUrl(mapUrl, sourceRoot.replace(endingSlash, "/"), map.sources[index])
}
sourceContent = (map.sourcesContent || [])[index]
fn(fullUrl, sourceContent, index)
}
}
function resolve(code, codeUrl, read, options, callback) {
if (typeof options === "function") {
callback = options
options = {}
}
if (code === null) {
var mapUrl = codeUrl
var data = {
sourceMappingURL: null,
url: mapUrl,
sourcesRelativeTo: mapUrl,
map: null
}
var readUrl = decodeUriComponent(mapUrl)
read(readUrl, function(error, result) {
if (error) {
error.sourceMapData = data
return callback(error)
}
data.map = String(result)
try {
data.map = parseMapToJSON(data.map, data)
} catch (error) {
return callback(error)
}
_resolveSources(data)
})
} else {
resolveSourceMap(code, codeUrl, read, function(error, mapData) {
if (error) {
return callback(error)
}
if (!mapData) {
return callback(null, null)
}
_resolveSources(mapData)
})
}
function _resolveSources(mapData) {
resolveSources(mapData.map, mapData.sourcesRelativeTo, read, options, function(error, result) {
if (error) {
return callback(error)
}
mapData.sourcesResolved = result.sourcesResolved
mapData.sourcesContent = result.sourcesContent
callback(null, mapData)
})
}
}
function resolveSync(code, codeUrl, read, options) {
var mapData
if (code === null) {
var mapUrl = codeUrl
mapData = {
sourceMappingURL: null,
url: mapUrl,
sourcesRelativeTo: mapUrl,
map: null
}
mapData.map = readSync(read, mapUrl, mapData)
mapData.map = parseMapToJSON(mapData.map, mapData)
} else {
mapData = resolveSourceMapSync(code, codeUrl, read)
if (!mapData) {
return null
}
}
var result = resolveSourcesSync(mapData.map, mapData.sourcesRelativeTo, read, options)
mapData.sourcesResolved = result.sourcesResolved
mapData.sourcesContent = result.sourcesContent
return mapData
}
module.exports = {
resolveSourceMap: resolveSourceMap,
resolveSourceMapSync: resolveSourceMapSync,
resolveSources: resolveSources,
resolveSourcesSync: resolveSourcesSync,
resolve: resolve,
resolveSync: resolveSync,
parseMapToJSON: parseMapToJSON
}