/**
* Invoke method, every class will have its own
* returns true/false on completion, setting both
* errormsg and output as necessary
*/
function invoke()
{
parent::invoke();
$result = true;
/// Set own core attributes
$this->does_generate = ACTION_NONE;
//$this->does_generate = ACTION_GENERATE_HTML;
/// These are always here
global $CFG, $XMLDB;
/// Do the job, setting result as needed
/// Get the dir containing the file
$dirpath = required_param('dir', PARAM_PATH);
$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
/// Get the correct dirs
if (!empty($XMLDB->dbdirs)) {
$dbdir =& $XMLDB->dbdirs[$dirpath];
} else {
return false;
}
if (!empty($XMLDB->editeddirs)) {
$editeddir =& $XMLDB->editeddirs[$dirpath];
$structure =& $editeddir->xml_file->getStructure();
}
/// ADD YOUR CODE HERE
$tableparam = required_param('table', PARAM_CLEAN);
$table =& $structure->getTable($tableparam);
/// If the changeme index exists, just get it and continue
$changeme_exists = false;
if ($indexes =& $table->getIndexes()) {
if ($index =& $table->getIndex('changeme')) {
$changeme_exists = true;
}
}
if (!$changeme_exists) {
/// Lets create the Index
$index = new XMLDBIndex('changeme');
$index->setComment('Default comment for the index, please edit me');
$table->addIndex($index);
/// We have one new key, so the structure has changed
$structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
$structure->setChanged(true);
}
/// Launch postaction if exists (leave this here!)
if ($this->getPostAction() && $result) {
return $this->launch($this->getPostAction());
}
/// Return ok if arrived here
return $result;
}