From 4e977da541307dd650917b49e9410a3ca753a944 Mon Sep 17 00:00:00 2001
From: Pan GaoYong <pan.gaoyong@gmail.com>
Date: Sat, 2 Apr 2016 19:33:33 +0800
Subject: `number_to_phone` formats number with regexp

By default, this method formats US number. This commit extends its
functionality to format number for other countries with a custom regular
expression.

    number_to_phone(18812345678, pattern: /(\d{3})(\d{4})(\d{4})/)
    # => 188-1234-5678

The output phone number is divided into three groups, so the regexp
should also match three groups of numbers.
---
 activesupport/lib/active_support/number_helper.rb           |  9 ++++++++-
 .../number_helper/number_to_phone_converter.rb              | 13 +++++++++++--
 2 files changed, 19 insertions(+), 3 deletions(-)

(limited to 'activesupport/lib')

diff --git a/activesupport/lib/active_support/number_helper.rb b/activesupport/lib/active_support/number_helper.rb
index 55628f0313..7a49bbb960 100644
--- a/activesupport/lib/active_support/number_helper.rb
+++ b/activesupport/lib/active_support/number_helper.rb
@@ -15,7 +15,7 @@ module ActiveSupport
 
     extend self
 
-    # Formats a +number+ into a US phone number (e.g., (555)
+    # Formats a +number+ into a phone number (US by default e.g., (555)
     # 123-9876). You can customize the format in the +options+ hash.
     #
     # ==== Options
@@ -27,6 +27,8 @@ module ActiveSupport
     #   end of the generated number.
     # * <tt>:country_code</tt> - Sets the country code for the phone
     #   number.
+    # * <tt>:pattern</tt> - Specifies how the number is divided into three
+    #   groups with the custom regexp to override the default format.
     # ==== Examples
     #
     #   number_to_phone(5551234)                                     # => "555-1234"
@@ -40,6 +42,11 @@ module ActiveSupport
     #
     #   number_to_phone(1235551234, country_code: 1, extension: 1343, delimiter: '.')
     #   # => "+1.123.555.1234 x 1343"
+    #
+    #   number_to_phone(75561234567, pattern: /(\d{1,4})(\d{4})(\d{4})$/, area_code: true)
+    #   # => "(755) 6123-4567"
+    #   number_to_phone(13312345678, pattern: /(\d{3})(\d{4})(\d{4})$/))
+    #   # => "133-1234-5678"
     def number_to_phone(number, options = {})
       NumberToPhoneConverter.convert(number, options)
     end
diff --git a/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
index af2ee56d91..dee74fa7a6 100644
--- a/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
@@ -18,12 +18,16 @@ module ActiveSupport
         end
 
         def convert_with_area_code(number)
-          number.gsub!(/(\d{1,3})(\d{3})(\d{4}$)/,"(\\1) \\2#{delimiter}\\3")
+          default_pattern = /(\d{1,3})(\d{3})(\d{4}$)/
+          number.gsub!(regexp_pattern(default_pattern),
+                       "(\\1) \\2#{delimiter}\\3")
           number
         end
 
         def convert_without_area_code(number)
-          number.gsub!(/(\d{0,3})(\d{3})(\d{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3")
+          default_pattern = /(\d{0,3})(\d{3})(\d{4})$/
+          number.gsub!(regexp_pattern(default_pattern),
+                       "\\1#{delimiter}\\2#{delimiter}\\3")
           number.slice!(0, 1) if start_with_delimiter?(number)
           number
         end
@@ -43,6 +47,11 @@ module ActiveSupport
         def phone_ext(ext)
           ext.blank? ? "" : " x #{ext}"
         end
+
+        def regexp_pattern(default_pattern)
+          opts.fetch :pattern, default_pattern
+        end
+
     end
   end
 end
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