Packing list email subject match Invoice/PO etc

app/controllers/documents_controller.php

@@ -903,6 +903,28 @@ EOT;
 	  return $subject;
 	}
 
+	function packing_list_email_subject($document) {
+	  $id = $document['Document']['id'];
+
+	  $q = <<<EOT
+	    SELECT p.title as packing_list_title, j.title as job_title, e.title as enquiry_title
+	    FROM packing_lists p
+	    JOIN enquiries e on p.enquiry_id = e.id
+	    JOIN jobs j on p.job_id = j.id
+	    WHERE p.document_id = $id;
+EOT;
+	  $titles = $this->Document->query($q);
+
+	  if(count($titles) < 1) {
+	    // This probably shouldn't happen, but who knows.
+	    $subject = 'Packing list';
+	    return $subject;
+	  }
+		  
+	  $subject = 'Packing list: '.$titles[0]['p']['packing_list_title'].' '.$titles[0]['e']['enquiry_title'].' '.$titles[0]['j']['job_title'];
+	  return $subject;
+	}
+	
 
 
   /**
@@ -985,7 +1007,7 @@ EOT;
         }
 	break;
     case 'packingList':
-      $subject = "Packing List: ".$enquiry['Enquiry']['title'];
+      $subject = $this->packing_list_email_subject($document);
       break;
     }