Added ability to delete a lock

git-svn-id: file:///svn-source/pmgr/branches/v0.3_work@1040 97e9348a-65ac-dc4b-aefc-98561f571b83

site/models/lock.php

@@ -57,6 +57,41 @@ class Lock extends AppModel {
     return $this->prReturn($this->save($data, false));
   }
 
+
+  /**************************************************************************
+   **************************************************************************
+   **************************************************************************
+   * function: destroy
+   *  - destroys a lock
+   */
+
+  function destroy($id) {
+    $this->prEnter(compact('id'));
+
+    // Can't delete a lock that's in use... check.
+    $this->id = $id;
+    $lock = $this->find
+      ('first', array
+       ('contain' => array('Unit'),
+	));
+
+    // If it's in use, bail with error
+    $this->pr(1, $lock);
+    if (isset($lock['Unit']) && count($lock['Unit']) > 0)
+      return $this->prReturn(false);
+
+    // Otherwise, attempt to delete the lock from the database
+    return $this->prReturn($this->delete());
+  }
+
+
+  /**************************************************************************
+   **************************************************************************
+   **************************************************************************
+   * function: lockList
+   *  - list of all locks in the system
+   */
+
   function lockList() {
     return $this->find('list',
 		       array('order' =>