First pass at implementing a new lock tracking mechnism. Not complete, but the basics seem to work

git-svn-id: file:///svn-source/pmgr/branches/v0.3_work@1038 97e9348a-65ac-dc4b-aefc-98561f571b83

site/models/lock.php

@@ -0,0 +1,67 @@
+<?php
+class Lock extends AppModel {
+
+	var $name = 'Lock';
+	var $validate = array(
+		'id' => array('numeric'),
+		'name' => array('notempty'),
+		'key' => array('notempty')
+	);
+
+	var $hasMany = array(
+		'LocksUnits'
+	);
+
+	var $hasAndBelongsToMany = array(
+		'Unit'
+	);
+
+	var $default_log_level = array('log' => 30, 'show' => 15);
+
+
+  /**************************************************************************
+   **************************************************************************
+   **************************************************************************
+   * function: saveLock
+   *  - save data about a new or existing lock
+   */
+
+  function saveLock($data) {
+    $this->prEnter(compact('data'));
+    $id = $data['Lock']['id'];
+
+    if ($id) {
+      $this->id = $id;
+
+      // Save the old key
+      $oldkey = $this->field('key');
+      $this->pr(5, compact('oldkey'));
+
+      if ($this->field('key') != $data['Lock']['key'])
+	$data['Lock']['last_key'] = $this->field('key');
+
+      /* // Find the number of outstanding locks in use */
+      /* $locks = $this->find('first', */
+      /* 			   array('link' => array('Unit' => array('fields' => array('Unit.id'))), */
+      /* 				 'fields' => 'SUM(Unit.id) AS inuse', */
+      /* 				 'conditions' => array('Lock.id' => $id), */
+      /* 				 )); */
+      /* $this->pr(5, compact('locks')); */
+
+      /* // Can't reduce the locks if there are all in use */
+      /* if ($locks[0]['inuse'] > $data['Lock']['qty']) */
+      /* 	return $this->prReturn(false); */
+    }
+
+    // Everything looks good... save it!
+    return $this->prReturn($this->save($data, false));
+  }
+
+  function lockList() {
+    return $this->find('list',
+		       array('order' =>
+			     array('name'),
+			     ));
+  }
+
+}

site/models/locks_unit.php

@@ -0,0 +1,11 @@
+<?php
+class LocksUnit extends AppModel {
+	var $primaryKey = false;
+
+	var $belongsTo = array(
+		'Lock',
+		'Unit',
+	);
+
+}
+?>

site/models/unit.php

@@ -25,6 +25,11 @@ class Unit extends AppModel {
 
 	var $hasMany = array(
 		'Lease',
+		'LocksUnit'
+	);
+
+	var $hasAndBelongsToMany = array(
+		'Lock'
 	);
 
 	//var $default_log_level = array('log' => 30, 'show' => 15);
@@ -209,6 +214,40 @@ class Unit extends AppModel {
   }
 
 
+  /**************************************************************************
+   **************************************************************************
+   **************************************************************************
+   * function: lockUnit
+   *  - Put lock on unit
+   */
+  function lockUnit($id, $lock_ids) {
+    $this->prEnter(compact('id', 'lock_ids'));
+    $this->id = $id;
+
+    // Remove any exising locks for this unit
+    $this->LocksUnit->deleteAll
+      (array('unit_id' => $id), false);
+
+    // We'll proceed forward as much as possible, even
+    // if we encounter an error.  For now, we'll assume
+    // the operation will succeed.
+    $ret = true;
+
+    // Go through each lock, and put them on the unit
+    foreach ($lock_ids AS $lock_id) {
+      $pair['unit_id'] = $id;
+      $pair['lock_id'] = $lock_id;
+
+      // Save the relationship between lock and unit
+      $LU = new LocksUnit();
+      if (!$LU->save($pair, false))
+	$ret = false;
+    }
+
+    return $this->prReturn($ret);
+  }
+
+
   /**************************************************************************
    **************************************************************************
    **************************************************************************