Merge in from pre_0.1 branch

git-svn-id: file:///svn-source/pmgr/trunk/site@847 97e9348a-65ac-dc4b-aefc-98561f571b83

models/membership.php

@@ -0,0 +1,37 @@
+<?php
+class Membership extends AppModel {
+
+  var $belongsTo =
+    array('User',
+	  'Site',
+	  'Group'
+	  );
+
+  function memberGroups($user_id, $site_id) {
+    $this->prEnter(compact('user_id', 'site_id'));
+
+    $this->cacheQueries = true;
+    $groups = $this->find('all', array
+			  ('recursive' => -1,
+			   'fields' => array('group_id'),
+			   'conditions' => array(array('user_id' => $user_id),
+						 array('site_id' => $site_id)),
+			   ));
+    $this->cacheQueries = false;
+
+    if (empty($groups))
+      return $this->prReturn(null);
+
+    $group_ids = array();
+    foreach ($groups AS $group)
+      $group_ids[] = $group['Membership']['group_id'];
+
+    return $this->prReturn($group_ids);
+  }
+
+  function memberOf($user_id, $site_id) {
+    $groups = $this->memberGroups($user_id, $site_id);
+    return (!empty($groups));
+  }
+
+}