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view_statement_xml.class.php
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view_statement_xml.class.php
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<?php // $Id$
///////////////////////////////////////////////////////////////////////////
// //
// NOTICE OF COPYRIGHT //
// //
// Moodle - Modular Object-Oriented Dynamic Learning Environment //
// http://moodle.com //
// //
// Copyright (C) 1999 onwards Martin Dougiamas http://dougiamas.com //
// (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details: //
// //
// http://www.gnu.org/copyleft/gpl.html //
// //
///////////////////////////////////////////////////////////////////////////
/// This class will display the XML for one statement being edited
class view_statement_xml extends XMLDBAction {
/**
* Init method, every subclass will have its own
*/
function init() {
parent::init();
/// Set own custom attributes
/// Get needed strings
$this->loadStrings(array(
/// 'key' => 'module',
));
}
/**
* 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_GENERATE_XML;
/// These are always here
global $CFG, $XMLDB;
/// Do the job, setting result as needed
/// Get the file parameter
$statement = required_param('statement', PARAM_CLEAN);
$select = required_param('select', PARAM_ALPHA); //original/edited
/// Get the dir containing the file
$dirpath = required_param('dir', PARAM_PATH);
$dirpath = $CFG->dirroot . $dirpath;
/// Get the correct dir
if ($select == 'original') {
if (!empty($XMLDB->dbdirs)) {
$base =& $XMLDB->dbdirs[$dirpath];
}
} else if ($select == 'edited') {
if (!empty($XMLDB->editeddirs)) {
$base =& $XMLDB->editeddirs[$dirpath];
}
} else {
$this->errormsg = 'Cannot access to ' . $select . ' info';
$result = false;
}
if ($base) {
/// Only if the directory exists and it has been loaded
if (!$base->path_exists || !$base->xml_loaded) {
$this->errormsg = 'Directory ' . $dirpath . ' not loaded';
return false;
}
} else {
$this->errormsg = 'Problem handling ' . $select . ' files';
return false;
}
/// Get the structure
if ($result) {
if (!$structure =& $base->xml_file->getStructure()) {
$this->errormsg = 'Error retrieving ' . $select . ' structure';
$result = false;
}
}
/// Get the statements
if ($result) {
if (!$statements =& $structure->getStatements()) {
$this->errormsg = 'Error retrieving ' . $select . ' statements';
$result = false;
}
}
/// Get the statement
if ($result && !$t =& $structure->getStatement($statement)) {
$this->errormsg = 'Error retrieving ' . $statement . ' statement';
$result = false;
}
if ($result) {
/// Everything is ok. Generate the XML output
$this->output = $t->xmlOutput();
} else {
/// Switch to HTML and error
$this->does_generate = ACTION_GENERATE_HTML;
}
/// Return ok if arrived here
return $result;
}
}
?>