Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle 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 3 of the License, or

// (at your option) any later version.

//

// Moodle 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.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * @package    tool_xmldb

 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

/**

 * This class will display the XML for one field being edited

 *

 * @package    tool_xmldb

 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class view_field_xml extends XMLDBAction {

    /**

     * Init method, every subclass will have its own

     */

    function init() {

        parent::init();

        // Set own custom attributes

        $this->sesskey_protected = false; // This action doesn't need sesskey protection

        // 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

        $field =  required_param('field', PARAM_PATH);

        $table =  required_param('table', PARAM_PATH);

        $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 tables

        if ($result) {

            if (!$tables = $structure->getTables()) {

                $this->errormsg = 'Error retrieving ' . $select . ' tables';

                $result = false;

            }

        }

        // Get the table

        if ($result && !$t = $structure->getTable($table)) {

            $this->errormsg = 'Error retrieving ' . $table . ' table';

            $result = false;

        }

        // Get the fields

        if ($result) {

            if (!$fields = $t->getFields()) {

                $this->errormsg = 'Error retrieving ' . $select . ' fields';

                $result = false;

            }

        }

        // Get the field

        if ($result && !$f = $t->getField($field)) {

            $this->errormsg = 'Error retrieving ' . $field . ' field';

            $result = false;

        }

        if ($result) {

            // Everything is ok. Generate the XML output

            $this->output = $f->xmlOutput();

        } else {

            // Switch to HTML and error

            $this->does_generate = ACTION_GENERATE_HTML;

        }

        // Return ok if arrived here

        return $result;

    }

}