load_xml_file.class.php

来自「很棒的在线教学系统」· PHP 代码 · 共 118 行

<?php // $Id: load_xml_file.class.php,v 1.7 2007/10/10 05:25:26 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//                                                                       //
// 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 load one XML file to memory if necessary

class load_xml_file extends XMLDBAction {

    /**
     * Init method, every subclass will have its own
     */
    function init() {
        parent::init();
    /// Set own core attributes
        $this->can_subaction = ACTION_NONE;
        //$this->can_subaction = ACTION_HAVE_SUBACTIONS;

    /// 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
        $this->does_generate = ACTION_NONE;
        //$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 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;
                }
                $xmldb_file = new XMLDBFile($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;
    }
}
?>