new_table.class.php

来自「很棒的在线教学系统」· PHP 代码 · 共 121 行

<?php // $Id: new_table.class.php,v 1.6 2007/10/10 05:25:29 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 create a new default table to be edited

class new_table 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
        $this->does_generate = ACTION_NONE;
        //$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

    /// If the changeme table exists, just get it and continue
        $changeme_exists = false;
        if ($tables =& $structure->getTables()) {
            if ($table =& $structure->getTable('changeme')) {
                $changeme_exists = true;
            }
        }
        if (!$changeme_exists) { /// Lets create the table
            $field = new XMLDBField('id');
            $field->setType(XMLDB_TYPE_INTEGER);
            $field->setLength(10);
            $field->setNotNull(true);
            $field->setUnsigned(true);
            $field->setSequence(true);
            $field->setLoaded(true);
            $field->setChanged(true);

            $key = new XMLDBKey('primary');
            $key->setType(XMLDB_KEY_PRIMARY);
            $key->setFields(array('id'));
            $key->setLoaded(true);
            $key->setChanged(true);

            $table = new XMLDBTable('changeme');
            $table->setComment('Default comment for the table, please edit me');
            $table->addField($field);
            $table->addKey($key);

        /// Finally, add the whole retroffited table to the structure
        /// in the place specified
            $structure->addTable($table);
        }
    /// Launch postaction if exists (leave this here!)
        if ($this->getPostAction() && $result) {
            return $this->launch($this->getPostAction());
        }

    /// Return ok if arrived here
        return $result;
    }
}
?>