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/>.

/**

 * Move book chapter

 *

 * @package    mod_book

 * @copyright  2004-2011 Petr Skoda {@link http://skodak.org}

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

 */

require(__DIR__.'/../../config.php');

require_once(__DIR__.'/locallib.php');

$id        = required_param('id', PARAM_INT);        // Course Module ID

$chapterid = required_param('chapterid', PARAM_INT); // Chapter ID

$up        = optional_param('up', 0, PARAM_BOOL);

$cm = get_coursemodule_from_id('book', $id, 0, false, MUST_EXIST);

$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);

$book = $DB->get_record('book', array('id'=>$cm->instance), '*', MUST_EXIST);

require_login($course, false, $cm);

require_sesskey();

$context = context_module::instance($cm->id);

require_capability('mod/book:edit', $context);

$chapter = $DB->get_record('book_chapters', array('id'=>$chapterid, 'bookid'=>$book->id), '*', MUST_EXIST);

$oldchapters = $DB->get_records('book_chapters', array('bookid'=>$book->id), 'pagenum', 'id, pagenum, subchapter');

$nothing = 0;

$chapters = array();

$chs = 0;

$che = 0;

$ts = 0;

$te = 0;

// create new ordered array and find chapters to be moved

$i = 1;

$found = 0;

foreach ($oldchapters as $ch) {

    $chapters[$i] = $ch;

    if ($chapter->id == $ch->id) {

        $chs = $i;

        $che = $chs;

        if ($ch->subchapter) {

            $found = 1;// Subchapter moves alone.

        }

    } else if ($chs) {

        if ($found) {

            // Nothing.

        } else if ($ch->subchapter) {

            $che = $i; // Chapter with subchapter(s).

        } else {

            $found = 1;

        }

    }

    $i++;

}

// Find target chapter(s).

if ($chapters[$chs]->subchapter) { // Moving single subchapter up or down.

    if ($up) {

        if ($chs == 1) {

            $nothing = 1; // Already first.

        } else {

            $ts = $chs - 1;

            $te = $ts;

        }

    } else { // Down.

        if ($che == count($chapters)) {

            $nothing = 1; // Already last.

        } else {

            $ts = $che + 1;

            $te = $ts;

        }

    }

} else { // Moving chapter and looking for next/previous chapter.

    if ($up) { // Up.

        if ($chs == 1) {

            $nothing = 1; // Already first.

        } else {

            $te = $chs - 1;

            for ($i = $chs-1; $i >= 1; $i--) {

                if ($chapters[$i]->subchapter) {

                    $ts = $i;

                } else {

                    $ts = $i;

                    break;

                }

            }

        }

    } else { // Down.

        if ($che == count($chapters)) {

            $nothing = 1; // Already last.

        } else {

            $ts = $che + 1;

            $found = 0;

            for ($i = $che+1; $i <= count($chapters); $i++) {

                if ($chapters[$i]->subchapter) {

                    $te = $i;

                } else {

                    if ($found) {

                        break;

                    } else {

                        $te = $i;

                        $found = 1;

                    }

                }

            }

        }

    }

}

// Recreated newly sorted list of chapters.

if (!$nothing) {

    $newchapters = array();

    if ($up) {

        if ($ts > 1) {

            for ($i=1; $i<$ts; $i++) {

                $newchapters[] = $chapters[$i];

            }

        }

        for ($i=$chs; $i<=$che; $i++) {

            $newchapters[$i] = $chapters[$i];

        }

        for ($i=$ts; $i<=$te; $i++) {

            $newchapters[$i] = $chapters[$i];

        }

        if ($che<count($chapters)) {

            for ($i=$che; $i<=count($chapters); $i++) {

                $newchapters[$i] = $chapters[$i];

            }

        }

    } else {

        if ($chs > 1) {

            for ($i=1; $i<$chs; $i++) {

                $newchapters[] = $chapters[$i];

            }

        }

        for ($i=$ts; $i<=$te; $i++) {

            $newchapters[$i] = $chapters[$i];

        }

        for ($i=$chs; $i<=$che; $i++) {

            $newchapters[$i] = $chapters[$i];

        }

        if ($te<count($chapters)) {

            for ($i=$te; $i<=count($chapters); $i++) {

                $newchapters[$i] = $chapters[$i];

            }

        }

    }

    // Store chapters in the new order.

    $i = 1;

    foreach ($newchapters as $ch) {

        $ch->pagenum = $i;

        $DB->update_record('book_chapters', $ch);

        $ch = $DB->get_record('book_chapters', array('id' => $ch->id));

        \mod_book\event\chapter_updated::create_from_chapter($book, $context, $ch)->trigger();

        $i++;

    }

}

book_preload_chapters($book); // fix structure

$DB->set_field('book', 'revision', $book->revision+1, array('id'=>$book->id));

redirect('view.php?id='.$cm->id.'&chapterid='.$chapter->id);