moving normalization logic into separate module

Makefile

@@ -4,7 +4,7 @@ all: PhoneNumberMetaData.js
 	python xml2meta.py $< > $@
 
 PhoneNumberMetaData.xml:
-	curl http://libphonenumber.googlecode.com/svn/trunk/resources/PhoneNumberMetaData.xml > $@
+	curl http://libphonenumber.googlecode.com/svn/trunk/resources/PhoneNumberMetadata.xml > $@
 
 clean:
 	rm -f PhoneNumberMetaData.xml *~

PhoneNumber.js

@@ -6,13 +6,11 @@ var PhoneNumber = (function (dataBase) {
   '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 "$"
@@ -216,58 +214,6 @@ var PhoneNumber = (function (dataBase) {
     }
   };
 
-  // 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, numbersOnly) {
-    if (typeof number !== 'string') {
-      return '';
-    }
-
-    number = number.replace(UNICODE_DIGITS,
-                            function (ch) {
-                              return String.fromCharCode(48 + (ch.charCodeAt(0) & 0xf));
-                            });
-    if (!numbersOnly) {
-      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);
@@ -338,7 +284,7 @@ var PhoneNumber = (function (dataBase) {
     var ret;
 
     // Remove formating characters and whitespace.
-    number = NormalizeNumber(number);
+    number = PhoneNumberNormalizer.Normalize(number);
 
     // If there is no defaultRegion, we can't parse international access codes.
     if (!defaultRegion && number[0] !== '+')
@@ -413,6 +359,5 @@ var PhoneNumber = (function (dataBase) {
   return {
     IsPlain: IsPlainPhoneNumber,
     Parse: ParseNumber,
-    Normalize: NormalizeNumber
   };
 })(PHONE_NUMBER_META_DATA);

PhoneNumberNormalizer.js

@@ -0,0 +1,48 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+var PhoneNumberNormalizer = (function() {
+  const UNICODE_DIGITS = /[\uFF10-\uFF19\u0660-\u0669\u06F0-\u06F9]/g;
+  const VALID_ALPHA_PATTERN = /[a-zA-Z]/g;
+  const LEADING_PLUS_CHARS_PATTERN = /^[+\uFF0B]+/g;
+  const NON_DIALABLE_CHARS = /[^,#+\*\d]/g;
+
+  // 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, numbersOnly) {
+    if (typeof number !== 'string') {
+      return '';
+    }
+
+    number = number.replace(UNICODE_DIGITS,
+                            function (ch) {
+                              return String.fromCharCode(48 + (ch.charCodeAt(0) & 0xf));
+                            });
+    if (!numbersOnly) {
+      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;
+  };
+
+
+  return {
+    Normalize: NormalizeNumber
+  };
+})();

fuzz.js

@@ -2,6 +2,7 @@
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 
 load("PhoneNumberMetaData.js");
+load("PhoneNumberNormalizer.js");
 load("PhoneNumber.js");
 
 let gCountryList;
@@ -70,4 +71,4 @@ for (var i = 0; i < 100000; i++) {
   }
 
   TestProperties(dial, getRandomCC());
-}
+}

test.js

@@ -2,6 +2,7 @@
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 
 load("PhoneNumberMetaData.js");
+load("PhoneNumberNormalizer.js")
 load("PhoneNumber.js");
 
 function IsPlain(dial, expected) {
@@ -13,7 +14,7 @@ function IsPlain(dial, expected) {
 }
 
 function Normalize(dial, expected) {
-  var result = PhoneNumber.Normalize(dial);
+  var result = PhoneNumberNormalizer.Normalize(dial);
   if (result != expected) {
     print("expected: " + expected);
     print("got: " + result);
@@ -260,6 +261,6 @@ Normalize("abcdefghijklmnopqrstuvwxyz", "22233344455566677778889999");
 AllEqual(["01187654321","0411187654321","551187654321","90411187654321","+551187654321"],"BR");
 AllEqual(["011987654321","04111987654321","5511987654321","904111987654321","+5511987654321"],"BR")
 
-IsEqual(PhoneNumber.Normalize("123abc", true), "123");
-IsEqual(PhoneNumber.Normalize("12345", true), "12345");
-IsEqual(PhoneNumber.Normalize("1abcd", false), "12223");
+IsEqual(PhoneNumberNormalizer.Normalize("123abc", true), "123");
+IsEqual(PhoneNumberNormalizer.Normalize("12345", true), "12345");
+IsEqual(PhoneNumberNormalizer.Normalize("1abcd", false), "12223");