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Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
<?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/>.

/**
 * Handles lesson actions
 *
 * ACTIONS handled are:
 *    confirmdelete
 *    delete
 *    move
 *    moveit
 *    duplicate
 * @package mod_lesson
 * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 **/

require_once("../../config.php");
require_once($CFG->dirroot.'/mod/lesson/locallib.php');

$id     = required_param('id', PARAM_INT);         // Course Module ID
$action = required_param('action', PARAM_ALPHA);   // Action
$pageid = required_param('pageid', PARAM_INT);

$cm = get_coursemodule_from_id('lesson', $id, 0, false, MUST_EXIST);
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
$lesson = new lesson($DB->get_record('lesson', array('id' => $cm->instance), '*', MUST_EXIST));

require_login($course, false, $cm);

$url = new moodle_url('/mod/lesson/lesson.php', array('id'=>$id,'action'=>$action));
$PAGE->set_url($url);

$context = context_module::instance($cm->id);
require_capability('mod/lesson:edit', $context);
require_sesskey();

$lessonoutput = $PAGE->get_renderer('mod_lesson');

/// Process the action
switch ($action) {
    case 'confirmdelete':
        $PAGE->navbar->add(get_string($action, 'lesson'));

        $thispage = $lesson->load_page($pageid);

        echo $lessonoutput->header($lesson, $cm, '', false, null, get_string('deletingpage', 'lesson', format_string($thispage->title)));
        echo $OUTPUT->heading(get_string("deletingpage", "lesson", format_string($thispage->title)));
        // print the jumps to this page
        $params = array("lessonid" => $lesson->id, "pageid" => $pageid);
        if ($answers = $DB->get_records_select("lesson_answers", "lessonid = :lessonid AND jumpto = :pageid + 1", $params)) {
            echo $OUTPUT->heading(get_string("thefollowingpagesjumptothispage", "lesson"));
            echo "<p align=\"center\">\n";
            foreach ($answers as $answer) {
                if (!$title = $DB->get_field("lesson_pages", "title", array("id" => $answer->pageid))) {
< print_error('cannotfindpagetitle', 'lesson');
> throw new \moodle_exception('cannotfindpagetitle', 'lesson');
} echo $title."<br />\n"; } } echo $OUTPUT->confirm(get_string("confirmdeletionofthispage","lesson"),"lesson.php?action=delete&id=$cm->id&pageid=$pageid","view.php?id=$cm->id"); break; case 'move': $PAGE->navbar->add(get_string($action, 'lesson')); $title = $DB->get_field("lesson_pages", "title", array("id" => $pageid)); echo $lessonoutput->header($lesson, $cm, '', false, null, get_string('moving', 'lesson', format_String($title)));
< echo $OUTPUT->heading(get_string("moving", "lesson", format_string($title)), 3);
> $headinglevel = $PAGE->activityheader->get_heading_level(); > echo $OUTPUT->heading(get_string("moving", "lesson", format_string($title)), $headinglevel);
$params = array ("lessonid" => $lesson->id, "prevpageid" => 0); if (!$page = $DB->get_record_select("lesson_pages", "lessonid = :lessonid AND prevpageid = :prevpageid", $params)) {
< print_error('cannotfindfirstpage', 'lesson');
> throw new \moodle_exception('cannotfindfirstpage', 'lesson');
} echo html_writer::start_tag('div', array('class' => 'move-page')); echo html_writer::start_tag('div', array('class' => 'available-position')); $moveurl = "lesson.php?id=$cm->id&sesskey=".sesskey()."&action=moveit&pageid=$pageid&after=0"; echo html_writer::link($moveurl, get_string("movepagehere", "lesson")); echo html_writer::end_tag('div'); while (true) { if ($page->id != $pageid) { if (!$title = trim(format_string($page->title))) { $title = "<< ".get_string("notitle", "lesson")." >>"; } echo html_writer::tag('div', $title, array('class' => 'page')); echo html_writer::start_tag('div', array('class' => 'available-position')); $moveurl = "lesson.php?id=$cm->id&sesskey=".sesskey()."&action=moveit&pageid=$pageid&after={$page->id}"; echo html_writer::link($moveurl, get_string("movepagehere", "lesson")); echo html_writer::end_tag('div'); } if ($page->nextpageid) { if (!$page = $DB->get_record("lesson_pages", array("id" => $page->nextpageid))) {
< print_error('cannotfindnextpage', 'lesson');
> throw new \moodle_exception('cannotfindnextpage', 'lesson');
} } else { // last page reached break; } } echo html_writer::end_tag('div'); break; case 'delete': $thispage = $lesson->load_page($pageid); $thispage->delete(); redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id"); break; case 'moveit': $after = (int)required_param('after', PARAM_INT); // target page $lesson->resort_pages($pageid, $after); redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id"); break; case 'duplicate': $lesson->duplicate_page($pageid); redirect(new moodle_url('/mod/lesson/edit.php', array('id' => $cm->id))); break; default:
< print_error('unknowaction');
> throw new \moodle_exception('unknowaction');
break; } echo $lessonoutput->footer();