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node_modules/y18n/index.js

@@ -0,0 +1,188 @@
+var fs = require('fs')
+var path = require('path')
+var util = require('util')
+
+function Y18N (opts) {
+  // configurable options.
+  opts = opts || {}
+  this.directory = opts.directory || './locales'
+  this.updateFiles = typeof opts.updateFiles === 'boolean' ? opts.updateFiles : true
+  this.locale = opts.locale || 'en'
+  this.fallbackToLanguage = typeof opts.fallbackToLanguage === 'boolean' ? opts.fallbackToLanguage : true
+
+  // internal stuff.
+  this.cache = {}
+  this.writeQueue = []
+}
+
+Y18N.prototype.__ = function () {
+  if (typeof arguments[0] !== 'string') {
+    return this._taggedLiteral.apply(this, arguments)
+  }
+  var args = Array.prototype.slice.call(arguments)
+  var str = args.shift()
+  var cb = function () {} // start with noop.
+
+  if (typeof args[args.length - 1] === 'function') cb = args.pop()
+  cb = cb || function () {} // noop.
+
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  // we've observed a new string, update the language file.
+  if (!this.cache[this.locale][str] && this.updateFiles) {
+    this.cache[this.locale][str] = str
+
+    // include the current directory and locale,
+    // since these values could change before the
+    // write is performed.
+    this._enqueueWrite([this.directory, this.locale, cb])
+  } else {
+    cb()
+  }
+
+  return util.format.apply(util, [this.cache[this.locale][str] || str].concat(args))
+}
+
+Y18N.prototype._taggedLiteral = function (parts) {
+  var args = arguments
+  var str = ''
+  parts.forEach(function (part, i) {
+    var arg = args[i + 1]
+    str += part
+    if (typeof arg !== 'undefined') {
+      str += '%s'
+    }
+  })
+  return this.__.apply(null, [str].concat([].slice.call(arguments, 1)))
+}
+
+Y18N.prototype._enqueueWrite = function (work) {
+  this.writeQueue.push(work)
+  if (this.writeQueue.length === 1) this._processWriteQueue()
+}
+
+Y18N.prototype._processWriteQueue = function () {
+  var _this = this
+  var work = this.writeQueue[0]
+
+  // destructure the enqueued work.
+  var directory = work[0]
+  var locale = work[1]
+  var cb = work[2]
+
+  var languageFile = this._resolveLocaleFile(directory, locale)
+  var serializedLocale = JSON.stringify(this.cache[locale], null, 2)
+
+  fs.writeFile(languageFile, serializedLocale, 'utf-8', function (err) {
+    _this.writeQueue.shift()
+    if (_this.writeQueue.length > 0) _this._processWriteQueue()
+    cb(err)
+  })
+}
+
+Y18N.prototype._readLocaleFile = function () {
+  var localeLookup = {}
+  var languageFile = this._resolveLocaleFile(this.directory, this.locale)
+
+  try {
+    localeLookup = JSON.parse(fs.readFileSync(languageFile, 'utf-8'))
+  } catch (err) {
+    if (err instanceof SyntaxError) {
+      err.message = 'syntax error in ' + languageFile
+    }
+
+    if (err.code === 'ENOENT') localeLookup = {}
+    else throw err
+  }
+
+  this.cache[this.locale] = localeLookup
+}
+
+Y18N.prototype._resolveLocaleFile = function (directory, locale) {
+  var file = path.resolve(directory, './', locale + '.json')
+  if (this.fallbackToLanguage && !this._fileExistsSync(file) && ~locale.lastIndexOf('_')) {
+    // attempt fallback to language only
+    var languageFile = path.resolve(directory, './', locale.split('_')[0] + '.json')
+    if (this._fileExistsSync(languageFile)) file = languageFile
+  }
+  return file
+}
+
+// this only exists because fs.existsSync() "will be deprecated"
+// see https://nodejs.org/api/fs.html#fs_fs_existssync_path
+Y18N.prototype._fileExistsSync = function (file) {
+  try {
+    return fs.statSync(file).isFile()
+  } catch (err) {
+    return false
+  }
+}
+
+Y18N.prototype.__n = function () {
+  var args = Array.prototype.slice.call(arguments)
+  var singular = args.shift()
+  var plural = args.shift()
+  var quantity = args.shift()
+
+  var cb = function () {} // start with noop.
+  if (typeof args[args.length - 1] === 'function') cb = args.pop()
+
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  var str = quantity === 1 ? singular : plural
+  if (this.cache[this.locale][singular]) {
+    str = this.cache[this.locale][singular][quantity === 1 ? 'one' : 'other']
+  }
+
+  // we've observed a new string, update the language file.
+  if (!this.cache[this.locale][singular] && this.updateFiles) {
+    this.cache[this.locale][singular] = {
+      one: singular,
+      other: plural
+    }
+
+    // include the current directory and locale,
+    // since these values could change before the
+    // write is performed.
+    this._enqueueWrite([this.directory, this.locale, cb])
+  } else {
+    cb()
+  }
+
+  // if a %d placeholder is provided, add quantity
+  // to the arguments expanded by util.format.
+  var values = [str]
+  if (~str.indexOf('%d')) values.push(quantity)
+
+  return util.format.apply(util, values.concat(args))
+}
+
+Y18N.prototype.setLocale = function (locale) {
+  this.locale = locale
+}
+
+Y18N.prototype.getLocale = function () {
+  return this.locale
+}
+
+Y18N.prototype.updateLocale = function (obj) {
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  for (var key in obj) {
+    this.cache[this.locale][key] = obj[key]
+  }
+}
+
+module.exports = function (opts) {
+  var y18n = new Y18N(opts)
+
+  // bind all functions to y18n, so that
+  // they can be used in isolation.
+  for (var key in y18n) {
+    if (typeof y18n[key] === 'function') {
+      y18n[key] = y18n[key].bind(y18n)
+    }
+  }
+
+  return y18n
+}