Add basic attribute exchange support

Closes #7

ax.ext.php

@@ -0,0 +1,153 @@
+<?PHP
+
+/* Poidsy 0.5 - http://chris.smith.name/projects/poidsy
+ * Copyright (c) 2008-2010 Chris Smith
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+ class AttributeExchange {
+
+  const NS = 'http://openid.net/srv/ax/1.0';
+
+  const USERNAME = 'http://axschema.org/namePerson/friendly';
+  const EMAIL = 'http://axschema.org/contact/email'; 
+  const FULLNAME = 'http://axschema.org/namePerson';
+  const DATEOFBIRTH = 'http://axschema.org/birthDate';
+  const GENDER = 'http://axschema.org/person/gender';
+  const POSTCODE = 'http://axschema.org/contact/postalCode/home';
+  const COUNTRY = 'http://axschema.org/contact/country/home';
+  const LANGUAGE = 'http://axschema.org/pref/language';
+  const TIMEZONE = 'http://axschema.org/pref/timezone';
+
+  const NAMEPREFIX = 'http://axschema.org/namePerson/prefix';
+  const FIRSTNAME = 'http://axschema.org/namePerson/first';
+  const LASTNAME = 'http://axschema.org/namePerson/last';
+  const MIDDLENAME = 'http://axschema.org/namePerson/middle';
+  const NAMESUFFIX = 'http://axschema.org/namePerson/suffix';
+
+  const COMPANYNAME = 'http://axschema.org/company/name';
+  const JOBTITLE = 'http://axschema.org/company/title';
+
+  const YEAROFBIRTH = 'http://axschema.org/birthDate/birthYear';
+  const MONTHOFBIRTH = 'http://axschema.org/birthDate/birthMonth';
+  const DAYOFBIRTH = 'http://axschema.org/birthDate/birthday';
+
+  private static $aliases = array();
+  private static $required = array();
+  private static $optional = array();
+  private static $count = array();
+
+  public static function addRequiredType($alias, $uri, $count = null) {
+   self::$required[] = $alias;
+
+   self::addType($alias, $uri, $count);
+  }
+
+  public static function addOptionalType($alias, $uri, $count = null) {
+   self::$optional[] = $alias;
+
+   self::addType($alias, $uri, $count);
+  }
+
+  private static function addType($alias, $uri, $count) {
+   self::$aliases[$alias] = $uri;
+
+   if ($count != null && (ctype_digit($count) || is_int($count) || $count == 'unlimited')) {
+    self::$count[$alias] = $count;
+   }
+  }
+
+  public function parseResponse() {
+   $ns = false;
+
+   foreach ($_REQUEST as $k => $v) {
+    if (substr($k, 0, 10) == 'openid_ns_' && $v == self::NS) {
+     $ns = substr($k, 10);
+     break;
+    }
+   }
+
+   if ($ns === false) { return; }
+
+   $_SESSION['openid']['ax'] = array(
+    'types' => array(),
+    'data' => array(),
+    'counts' => array()
+   );
+
+   foreach ($_REQUEST as $k => $v) {
+    if (substr($k, 0, 8 + strlen($ns)) == "openid_{$ns}_") {
+     // TODO: Need to check mode etc
+
+     $rest = substr($k, 8 + strlen($ns));
+     if (substr($rest, 0, 5) == 'type_') {
+      $_SESSION['openid']['ax']['types'][substr($rest, 5)] = $v;
+     } else if (substr($rest, 0, 6) == 'count_') {
+      $_SESSION['openid']['ax']['counts'][substr($rest, 6)] = (int) $v;
+     }
+    }
+   }
+
+   foreach ($_SESSION['openid']['ax']['types'] as $alias => $uri) {
+    if (!isset($_SESSION['openid']['ax']['counts'][$alias])) {
+     $_SESSION['openid']['ax']['counts'][$alias] = 1;
+    }
+
+    $count = $_SESSION['openid']['ax']['counts'][$alias];
+
+    if ($count > 1) {
+     for ($i = 1; $i < $count + 1; $i++) {
+      $_SESSION['openid']['ax']['data'][$alias][] = $_REQUEST["openid_{$ns}_value_{$alias}_$i"];
+     }
+    } else if ($count == 1) {
+     $_SESSION['openid']['ax']['data'][$alias] = $_REQUEST["openid_{$ns}_value_$alias"];
+    }
+   }
+  }
+
+  public function decorate(&$args, $ns) {
+   $args['openid.ns.' . $ns] = self::NS;
+   $args['openid.' . $ns . '.mode'] = 'fetch_request';
+
+   foreach (array_merge(self::$optional, self::$required) as $alias) {
+    $args['openid.' . $ns . '.type.' . $alias] = self::$aliases[$alias];
+   }
+
+   foreach (self::$count as $alias => $count) {
+    $args['openid.' . $ns . '.count.' . $alias] = $count;
+   }
+
+   if (!empty(self::$optional)) {
+    $args['openid.' . $ns . '.if_available'] = implode(',', self::$optional);
+   }
+
+   if (!empty(self::$required)) {
+    $args['openid.' . $ns . '.required'] = implode(',', self::$required);
+   }
+  }
+
+ }
+
+ $ax = new AttributeExchange();
+ $_POIDSY['decorators'][] = $ax;
+ $_POIDSY['handlers'][] = $ax;
+ unset($ax);
+
+?>

examples/basic/index.php

@@ -58,6 +58,10 @@
   // Include the simple registration extension
   require('../../sreg.ext.php');
 
+  // Include and configure the attribute exchange extension
+  require('../../ax.ext.php');
+  AttributeExchange::addRequiredType('email', AttributeExchange::EMAIL);
+
   require('../../processor.php');
 
  } else {
@@ -129,6 +133,34 @@
    unset($_SESSION['openid']['sreg']);
   }
 
+  // Show the attribute exchange data returned, if any.
+  if (isset($_SESSION['openid']['ax'])) {
+   echo '<table>';
+   echo '<caption>Attribute Exchange Extension data</caption>';
+
+   foreach ($_SESSION['openid']['ax']['types'] as $type => $uri) {
+    echo '<tr><th>', htmlentities($type), '</th>';
+    echo '<td>', htmlentities($uri), '</td>';
+    echo '<td>', $count = $_SESSION['openid']['ax']['counts'][$type], '</td>';
+    echo '<td>';
+    if ($count == 1) {
+     echo htmlentities($_SESSION['openid']['ax']['data'][$type]);
+    } else if ($count > 1) {
+     echo '<ol>';
+     foreach ($_SESSION['openid']['ax']['data'][$type] as $value) {
+      echo '<li>', htmlentities($value), '</li>';
+     }
+     echo '</ol>';
+    }
+    echo '</td>';
+    echo '</tr>';
+   }
+
+   echo '</table>';
+
+   unset($_SESSION['openid']['sreg']);
+  }
+
  }
 ?>
   <form action="<?PHP echo htmlentities($_SERVER['REQUEST_URI']); ?>"