gecko/dom/phonenumberutils/PhoneNumber.jsm

398 lines
15 KiB
JavaScript

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
// Don't modify this code. Please use:
// https://github.com/andreasgal/PhoneNumber.js
"use strict";
this.EXPORTED_SYMBOLS = ["PhoneNumber"];
Components.utils.import("resource://gre/modules/PhoneNumberMetaData.jsm");
this.PhoneNumber = (function (dataBase) {
// Use strict in our context only - users might not want it
'use strict';
const MAX_PHONE_NUMBER_LENGTH = 50;
const UNICODE_DIGITS = /[\uFF10-\uFF19\u0660-\u0669\u06F0-\u06F9]/g;
const NON_ALPHA_CHARS = /[^a-zA-Z]/g;
const NON_DIALABLE_CHARS = /[^,#+\*\d]/g;
const NON_DIALABLE_CHARS_ONCE = new RegExp(NON_DIALABLE_CHARS.source);
const BACKSLASH = /\\/g;
const SPLIT_FIRST_GROUP = /^(\d+)(.*)$/;
const VALID_ALPHA_PATTERN = /[a-zA-Z]/g;
const LEADING_PLUS_CHARS_PATTERN = /^[+\uFF0B]+/g;
// Format of the string encoded meta data. If the name contains "^" or "$"
// we will generate a regular expression from the value, with those special
// characters as prefix/suffix.
const META_DATA_ENCODING = ["region",
"^internationalPrefix",
"nationalPrefix",
"^nationalPrefixForParsing",
"nationalPrefixTransformRule",
"nationalPrefixFormattingRule",
"^possiblePattern$",
"^nationalPattern$",
"formats"];
const FORMAT_ENCODING = ["^pattern$",
"nationalFormat",
"^leadingDigits",
"nationalPrefixFormattingRule",
"internationalFormat"];
var regionCache = Object.create(null);
// Parse an array of strings into a convenient object. We store meta
// data as arrays since thats much more compact than JSON.
function ParseArray(array, encoding, obj) {
for (var n = 0; n < encoding.length; ++n) {
var value = array[n];
if (!value)
continue;
var field = encoding[n];
var fieldAlpha = field.replace(NON_ALPHA_CHARS, "");
if (field != fieldAlpha)
value = new RegExp(field.replace(fieldAlpha, value));
obj[fieldAlpha] = value;
}
return obj;
}
// Parse string encoded meta data into a convenient object
// representation.
function ParseMetaData(countryCode, md) {
var array = eval(md.replace(BACKSLASH, "\\\\"));
md = ParseArray(array,
META_DATA_ENCODING,
{ countryCode: countryCode });
regionCache[md.region] = md;
return md;
}
// Parse string encoded format data into a convenient object
// representation.
function ParseFormat(md) {
var formats = md.formats;
// Bail if we already parsed the format definitions.
if (!(Array.isArray(formats[0])))
return;
for (var n = 0; n < formats.length; ++n) {
formats[n] = ParseArray(formats[n],
FORMAT_ENCODING,
{});
}
}
// Search for the meta data associated with a region identifier ("US") in
// our database, which is indexed by country code ("1"). Since we have
// to walk the entire database for this, we cache the result of the lookup
// for future reference.
function FindMetaDataForRegion(region) {
// Check in the region cache first. This will find all entries we have
// already resolved (parsed from a string encoding).
var md = regionCache[region];
if (md)
return md;
for (var countryCode in dataBase) {
var entry = dataBase[countryCode];
// Each entry is a string encoded object of the form '["US..', or
// an array of strings. We don't want to parse the string here
// to save memory, so we just substring the region identifier
// and compare it. For arrays, we compare against all region
// identifiers with that country code. We skip entries that are
// of type object, because they were already resolved (parsed into
// an object), and their country code should have been in the cache.
if (Array.isArray(entry)) {
for (var n = 0; n < entry.length; n++) {
if (typeof entry[n] == "string" && entry[n].substr(2,2) == region) {
if (n > 0) {
// Only the first entry has the formats field set.
// Parse the main country if we haven't already and use
// the formats field from the main country.
if (typeof entry[0] == "string")
entry[0] = ParseMetaData(countryCode, entry[0]);
let formats = entry[0].formats;
let current = ParseMetaData(countryCode, entry[n]);
current.formats = formats;
return entry[n] = current;
}
entry[n] = ParseMetaData(countryCode, entry[n]);
return entry[n];
}
}
continue;
}
if (typeof entry == "string" && entry.substr(2,2) == region)
return dataBase[countryCode] = ParseMetaData(countryCode, entry);
}
}
// Format a national number for a given region. The boolean flag "intl"
// indicates whether we want the national or international format.
function FormatNumber(regionMetaData, number, intl) {
// We lazily parse the format description in the meta data for the region,
// so make sure to parse it now if we haven't already done so.
ParseFormat(regionMetaData);
var formats = regionMetaData.formats;
for (var n = 0; n < formats.length; ++n) {
var format = formats[n];
// The leading digits field is optional. If we don't have it, just
// use the matching pattern to qualify numbers.
if (format.leadingDigits && !format.leadingDigits.test(number))
continue;
if (!format.pattern.test(number))
continue;
if (intl) {
// If there is no international format, just fall back to the national
// format.
var internationalFormat = format.internationalFormat;
if (!internationalFormat)
internationalFormat = format.nationalFormat;
// Some regions have numbers that can't be dialed from outside the
// country, indicated by "NA" for the international format of that
// number format pattern.
if (internationalFormat == "NA")
return null;
// Prepend "+" and the country code.
number = "+" + regionMetaData.countryCode + " " +
number.replace(format.pattern, internationalFormat);
} else {
number = number.replace(format.pattern, format.nationalFormat);
// The region has a national prefix formatting rule, and it can be overwritten
// by each actual number format rule.
var nationalPrefixFormattingRule = regionMetaData.nationalPrefixFormattingRule;
if (format.nationalPrefixFormattingRule)
nationalPrefixFormattingRule = format.nationalPrefixFormattingRule;
if (nationalPrefixFormattingRule) {
// The prefix formatting rule contains two magic markers, "$NP" and "$FG".
// "$NP" will be replaced by the national prefix, and "$FG" with the
// first group of numbers.
var match = number.match(SPLIT_FIRST_GROUP);
var firstGroup = match[1];
var rest = match[2];
var prefix = nationalPrefixFormattingRule;
prefix = prefix.replace("$NP", regionMetaData.nationalPrefix);
prefix = prefix.replace("$FG", firstGroup);
number = prefix + rest;
}
}
return (number == "NA") ? null : number;
}
return null;
}
function NationalNumber(regionMetaData, number) {
this.region = regionMetaData.region;
this.regionMetaData = regionMetaData;
this.nationalNumber = number;
}
// NationalNumber represents the result of parsing a phone number. We have
// three getters on the prototype that format the number in national and
// international format. Once called, the getters put a direct property
// onto the object, caching the result.
NationalNumber.prototype = {
// +1 949-726-2896
get internationalFormat() {
var value = FormatNumber(this.regionMetaData, this.nationalNumber, true);
Object.defineProperty(this, "internationalFormat", { value: value, enumerable: true });
return value;
},
// (949) 726-2896
get nationalFormat() {
var value = FormatNumber(this.regionMetaData, this.nationalNumber, false);
Object.defineProperty(this, "nationalFormat", { value: value, enumerable: true });
return value;
},
// +19497262896
get internationalNumber() {
var value = this.internationalFormat ? this.internationalFormat.replace(NON_DIALABLE_CHARS, "")
: null;
Object.defineProperty(this, "internationalNumber", { value: value, enumerable: true });
return value;
}
};
// Map letters to numbers according to the ITU E.161 standard
var E161 = {
'a': 2, 'b': 2, 'c': 2,
'd': 3, 'e': 3, 'f': 3,
'g': 4, 'h': 4, 'i': 4,
'j': 5, 'k': 5, 'l': 5,
'm': 6, 'n': 6, 'o': 6,
'p': 7, 'q': 7, 'r': 7, 's': 7,
't': 8, 'u': 8, 'v': 8,
'w': 9, 'x': 9, 'y': 9, 'z': 9
};
// Normalize a number by converting unicode numbers and symbols to their
// ASCII equivalents and removing all non-dialable characters.
function NormalizeNumber(number) {
if (typeof number !== 'string') {
return '';
}
number = number.replace(UNICODE_DIGITS,
function (ch) {
return String.fromCharCode(48 + (ch.charCodeAt(0) & 0xf));
});
number = number.replace(VALID_ALPHA_PATTERN,
function (ch) {
return String(E161[ch.toLowerCase()] || 0);
});
number = number.replace(LEADING_PLUS_CHARS_PATTERN, "+");
number = number.replace(NON_DIALABLE_CHARS, "");
return number;
}
// Check whether the number is valid for the given region.
function IsValidNumber(number, md) {
return md.possiblePattern.test(number);
}
// Check whether the number is a valid national number for the given region.
function IsNationalNumber(number, md) {
return IsValidNumber(number, md) && md.nationalPattern.test(number);
}
// Determine the country code a number starts with, or return null if
// its not a valid country code.
function ParseCountryCode(number) {
for (var n = 1; n <= 3; ++n) {
var cc = number.substr(0,n);
if (dataBase[cc])
return cc;
}
return null;
}
// Parse an international number that starts with the country code. Return
// null if the number is not a valid international number.
function ParseInternationalNumber(number) {
var ret;
// Parse and strip the country code.
var countryCode = ParseCountryCode(number);
if (!countryCode)
return null;
number = number.substr(countryCode.length);
// Lookup the meta data for the region (or regions) and if the rest of
// the number parses for that region, return the parsed number.
var entry = dataBase[countryCode];
if (Array.isArray(entry)) {
for (var n = 0; n < entry.length; ++n) {
if (typeof entry[n] == "string")
entry[n] = ParseMetaData(countryCode, entry[n]);
ret = ParseNationalNumber(number, entry[n])
if (ret)
return ret;
}
return null;
}
if (typeof entry == "string")
entry = dataBase[countryCode] = ParseMetaData(countryCode, entry);
return ParseNationalNumber(number, entry);
}
// Parse a national number for a specific region. Return null if the
// number is not a valid national number (it might still be a possible
// number for parts of that region).
function ParseNationalNumber(number, md) {
if (!md.possiblePattern.test(number) ||
!md.nationalPattern.test(number)) {
return null;
}
// Success.
return new NationalNumber(md, number);
}
// Parse a number and transform it into the national format, removing any
// international dial prefixes and country codes.
function ParseNumber(number, defaultRegion) {
var ret;
// Remove formating characters and whitespace.
number = NormalizeNumber(number);
// If there is no defaultRegion, we can't parse international access codes.
if (!defaultRegion && number[0] !== '+')
return null;
// Detect and strip leading '+'.
if (number[0] === '+')
return ParseInternationalNumber(number.replace(LEADING_PLUS_CHARS_PATTERN, ""));
// Lookup the meta data for the given region.
var md = FindMetaDataForRegion(defaultRegion.toUpperCase());
// See if the number starts with an international prefix, and if the
// number resulting from stripping the code is valid, then remove the
// prefix and flag the number as international.
if (md.internationalPrefix.test(number)) {
var possibleNumber = number.replace(md.internationalPrefix, "");
ret = ParseInternationalNumber(possibleNumber)
if (ret)
return ret;
}
// This is not an international number. See if its a national one for
// the current region. National numbers can start with the national
// prefix, or without.
if (md.nationalPrefixForParsing) {
// Some regions have specific national prefix parse rules. Apply those.
var withoutPrefix = number.replace(md.nationalPrefixForParsing,
md.nationalPrefixTransformRule);
ret = ParseNationalNumber(withoutPrefix, md)
if (ret)
return ret;
} else {
// If there is no specific national prefix rule, just strip off the
// national prefix from the beginning of the number (if there is one).
var nationalPrefix = md.nationalPrefix;
if (nationalPrefix && number.indexOf(nationalPrefix) == 0 &&
(ret = ParseNationalNumber(number.substr(nationalPrefix.length), md))) {
return ret;
}
}
ret = ParseNationalNumber(number, md)
if (ret)
return ret;
// If the number matches the possible numbers of the current region,
// return it as a possible number.
if (md.possiblePattern.test(number))
return new NationalNumber(md, number);
// Now lets see if maybe its an international number after all, but
// without '+' or the international prefix.
ret = ParseInternationalNumber(number)
if (ret)
return ret;
// We couldn't parse the number at all.
return null;
}
function IsPlainPhoneNumber(number) {
if (typeof number !== 'string') {
return false;
}
var length = number.length;
var isTooLong = (length > MAX_PHONE_NUMBER_LENGTH);
var isEmpty = (length === 0);
return !(isTooLong || isEmpty || NON_DIALABLE_CHARS_ONCE.test(number));
}
return {
IsPlain: IsPlainPhoneNumber,
Parse: ParseNumber,
Normalize: NormalizeNumber
};
})(PHONE_NUMBER_META_DATA);