From 133e0cd1d442a6f1282def80d3b8cc433b86c183 Mon Sep 17 00:00:00 2001
From: Alan Knowles <alan@roojs.com>
Date: Wed, 28 Sep 2011 12:31:33 +0800
Subject: [PATCH] DataObjects/Events.php

---
 DataObjects/Events.php | 43 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/DataObjects/Events.php b/DataObjects/Events.php
index 6ffd3d8b..39417895 100644
--- a/DataObjects/Events.php
+++ b/DataObjects/Events.php
@@ -59,4 +59,47 @@ class Pman_Core_DataObjects_Events extends DB_DataObject
         $rem[] = $remarks;
         $this->remarks = implode(' : ', $rem);
     }
+    
+    /**
+     * Generate an audit for this field.
+     *
+     * @param {DB_DataObject} new data
+     * @param {DB_DataObject} old data
+     * 
+     * @return {int} number of entries logged.
+     */
+    
+    function audit($new, $old = false)
+    {
+        if ($old == $new) {
+            return 0; // they are the same...
+        }
+         
+        $ret = 0;
+        foreach(array_keys($new->table()) as $k) {
+            // should we JSON serialize this?
+            $n = empty($new->$k) ? '' : $new->$k;
+            $o = empty($old->$k) || empty($old->$k) ? '' : $old->$k;
+            if ($n == $o) {
+                continue;
+            }
+            $ret += $this->auditChange($k, $new, $old);
+        }
+        return $ret;
+    }
+    
+    function auditChange($field, $new, $old)
+    {
+        
+        if (!$old === false) {
+            $this->addentry($fieldname, 'set', $old, $new);
+            return 1;
+        }
+        if ($new === false) {
+            $this->addentry($fieldname, 'deleted', $old, $new);
+            return 1;
+        }
+        $this->addentry($fieldname, 'changed', $old, $new);
+        return 1;
+    }
 }
-- 
2.39.2