/**
* 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 . $dirpath;
/// Get the correct dir
if (!empty($XMLDB->dbdirs)) {
$dbdir =& $XMLDB->dbdirs[$dirpath];
if ($dbdir) {
/// Set some defaults
$dbdir->xml_exists = false;
$dbdir->xml_writeable = false;
$dbdir->xml_loaded = false;
///Only if the directory exists
if (!$dbdir->path_exists) {
return false;
}
$xmldb_file = new xmldb_file($dbdir->path . '/install.xml');
///Set the XML DTD and schema
$xmldb_file->setDTD($CFG->dirroot . '/lib/xmldb/xmldb.dtd');
$xmldb_file->setSchema($CFG->dirroot . '/lib/xmldb/xmldb.xsd');
/// Set dbdir as necessary
if ($xmldb_file->fileExists()) {
$dbdir->xml_exists = true;
}
if ($xmldb_file->fileWriteable()) {
$dbdir->xml_writeable = true;
}
/// Load the XML contents to structure
$loaded = $xmldb_file->loadXMLStructure();
if ($loaded && $xmldb_file->isLoaded()) {
$dbdir->xml_loaded = true;
$dbdir->filemtime = filemtime($dbdir->path . '/install.xml');
}
$dbdir->xml_file = $xmldb_file;
} else {
$this->errormsg = 'Wrong directory (' . $dirpath . ')';
$result = false;
}
} else {
$this->errormsg = 'XMLDB structure not found';
$result = false;
}
/// Launch postaction if exists
if ($this->getPostAction() && $result) {
return $this->launch($this->getPostAction());
}
return $result;
}