Fix backslash character handling on vCard import (#1489085)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix backslash character handling on vCard import (#1489085)
 - Fix csv import from Thunderbird with French localization (#1489059)
 - Fix messages list focus issue in Opera and Webkit (#1489058)
 - Make PHP code eval() free, use create_function()

program/lib/Roundcube/rcube_vcard.php

@@ -784,9 +784,30 @@ class rcube_vcard
                 }
                 return $result;
             }
+
+            $s = strtr($s, $rep2);
+        }
+
+        // some implementations (GMail) use non-standard backslash before colon (#1489085)
+        // we will handle properly any backslashed character - removing dummy backslahes
+        // return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\N' => "\n", '\,' => ',', '\;' => ';'));
+
+        $s   = str_replace("\r", '', $s);
+        $pos = 0;
+
+        while (($pos = strpos($s, '\\', $pos)) !== false) {
+            $next = substr($s, $pos + 1, 1);
+            if ($next == 'n' || $next == 'N') {
+                $s = substr_replace($s, "\n", $pos, 2);
+            }
+            else {
+                $s = substr_replace($s, '', $pos, 1);
+            }
+
+            $pos += 1;
         }
 
-        return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\N' => "\n", '\,' => ',', '\;' => ';'));
+        return $s;
     }
 
     /**

tests/Framework/VCard.php

@@ -65,6 +65,20 @@ class Framework_VCard extends PHPUnit_Framework_TestCase
         $this->assertEquals("prefix", $vcard['prefix'], "Decode backslash character");
     }
 
+    /**
+     * Backslash parsing test (#1489085)
+     */
+    function test_parse_five()
+    {
+        $vcard = "BEGIN:VCARD\nVERSION:3.0\nN:last\\\\\\a;fir\\nst\nURL:http\\://domain.tld\nEND:VCARD";
+        $vcard = new rcube_vcard($vcard, null);
+        $vcard = $vcard->get_assoc();
+
+        $this->assertEquals("last\\a", $vcard['surname'], "Decode dummy backslash character");
+        $this->assertEquals("fir\nst", $vcard['firstname'], "Decode backslash character");
+        $this->assertEquals("http://domain.tld", $vcard['website:other'][0], "Decode dummy backslash character");
+    }
+
     function test_import()
     {
         $input = file_get_contents($this->_srcpath('apple.vcf'));