From fb4c36d7cb6042fbec466f9bfb1cf3d0caeb6854 Mon Sep 17 00:00:00 2001
From: uckelman <uckelman@nomic.net>
Date: Thu, 25 Nov 2010 11:15:16 +0000
Subject: Added has_rfc822_specials and rfc822_quote for handling names in
 email addresses.

git-svn-id: https://vassalengine.svn.sourceforge.net/svnroot/vassalengine/site-src/trunk@7492 67b53d14-2c14-4ace-a08f-0dab2b34000c
---
 src/Util.php      | 11 +++++++++++
 test/UtilTest.php | 27 +++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/src/Util.php b/src/Util.php
index 0f1499a..47a26a4 100644
--- a/src/Util.php
+++ b/src/Util.php
@@ -24,6 +24,17 @@ function throw_if_null($arg) {
   if ($arg === null) throw new Exception('argument is null');
 }
 
+function has_rfc822_specials($str) {
+  // check for RFC822 specials (see section 3.3)
+  return strpbrk($str, '()<>@,;:\".[]') !== false;
+}
+
+function rfc822_quote($str) {
+  // turn \ and " into quoted-pairs, then quote the whole string
+  return '"' . str_replace(array("\\",   "\"",),
+                           array("\\\\", "\\\""), $str) . '"';
+}
+
 function is_ascii($str) {
   return !preg_match('/[^[:ascii:]]/', $str);
 }
diff --git a/test/UtilTest.php b/test/UtilTest.php
index 7135b9f..1cf8eac 100644
--- a/test/UtilTest.php
+++ b/test/UtilTest.php
@@ -5,6 +5,33 @@ require_once('PHPUnit/Framework.php');
 require_once(__DIR__ . '/../src/Util.php');
 
 class UtilTest extends PHPUnit_Framework_TestCase {
+
+  public function has_rfc822_specials_provider() {
+    return array(
+      array('Joel Uckelman', false),
+      array('L.Tankersley', true),
+      array('()<>@,;:\".[]', true)
+    );
+  }
+
+  /** @dataProvider has_rfc822_specials_provider */
+  public function test_has_rfc822_specials($string, $expected) {
+    $this->assertEquals($expected, has_rfc_822_specials($string));
+  }
+
+  public function rfc822_quote_provider() {
+    return array(
+      array('Joel Uckelman', 'Joel Uckelman'),
+      array('L.Tankersley',  '"L.Tankersley"'),
+      array('"\foo\"',       '"\"\\foo\\\""')
+    );
+  }
+
+  /** @dataProvider rfc822_quote_provider */
+  public function test_rfc822_quote($string, $expected) {
+    $this->assertEquals($expected, rfc_822_quote($string));
+  }
+
   public function is_ascii_provider() {
     return array(
       array('', true),
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