Indicate which filters are using a canned reply

include/staff/cannedreply.inc.php

@@ -9,6 +9,11 @@ if($canned && $_REQUEST['a']!='add'){
     $info=$canned->getInfo();
     $info['id']=$canned->getId();
     $qstr.='&id='.$canned->getId();
+    $res = db_query(
+          'SELECT GROUP_CONCAT(DISTINCT name ORDER BY name SEPARATOR ", ")'
+        .' FROM '.EMAIL_FILTER_TABLE
+        .' WHERE canned_response_id = '.db_input($canned->getId()));
+    $info['filter'] = ($res && ($row = db_fetch_row($res))) ? $row[0] : null;
 }else {
     $title='Add New Canned Reply';
     $action='create';
@@ -107,6 +112,11 @@ $info=Format::htmlchars(($errors && $_POST)?$_POST:$info);
         </tr>
     </tbody>
 </table>
+ <?php if ($info['filter']) { ?>
+    <br/>
+    <div id="msg_warning">Canned reply is in use by email filter(s): <?php
+    echo $info['filter']; ?></div>
+ <?php } ?>
 <p style="padding-left:225px;">
     <input type="submit" name="submit" value="<?php echo $submit_text; ?>">
     <input type="reset"  name="reset"  value="Reset">