course/changenumsections.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * This script allows the number of sections in a course to be increased
  20  * or decreased, redirecting to the course page.
  21  *
  22  * @package core_course
  23  * @copyright 2012 Dan Poltawski
  24  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  * @since Moodle 2.3
  26  */
  27
  28 require_once(__DIR__.'/../config.php');
  29 require_once($CFG->dirroot.'/course/lib.php');
  30
  31 $courseid = required_param('courseid', PARAM_INT);
  32 $increase = optional_param('increase', null, PARAM_BOOL);
  33 $insertsection = optional_param('insertsection', null, PARAM_INT); // Insert section at position; 0 means at the end.
  34 $numsections = optional_param('numsections', 1, PARAM_INT);        // Number of sections to insert.
  35 $returnurl = optional_param('returnurl', null, PARAM_LOCALURL);    // Where to return to after the action.
  36 $sectionreturn = optional_param('sectionreturn', null, PARAM_INT); // Section to return to, ignored if $returnurl is specified.
  37
  38 $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  39 $courseformatoptions = course_get_format($course)->get_format_options();
  40
  41 $PAGE->set_url('/course/changenumsections.php', array('courseid' => $courseid));
  42
  43 // Authorisation checks.
  44 require_login($course);
  45 require_capability('moodle/course:update', context_course::instance($course->id));
  46 require_sesskey();
  47
  48 $desirednumsections = 0;
  49 $courseformat = course_get_format($course);
  50 $lastsectionnumber = $courseformat->get_last_section_number();
  51 $maxsections = $courseformat->get_max_sections();
  52
  53 if (isset($courseformatoptions['numsections']) && $increase !== null) {
  54     $desirednumsections = $courseformatoptions['numsections'] + 1;
  55 } else if (course_get_format($course)->uses_sections() && $insertsection !== null) {
  56     // Count the sections in the course.
  57     $desirednumsections = $lastsectionnumber + $numsections;
  58 }
  59
  60 if ($desirednumsections > $maxsections) {
  61     // Increase in number of sections is not allowed.
  62     \core\notification::warning(get_string('maxsectionslimit', 'moodle', $maxsections));
  63     $increase = null;
  64     $insertsection = null;
  65     $numsections = 0;
  66
  67     if (!$returnurl) {
  68         $returnurl = course_get_url($course);
  69     }
  70 }
  71
  72 if (isset($courseformatoptions['numsections']) && $increase !== null) {
  73     if ($increase) {
  74         // Add an additional section.
  75         $courseformatoptions['numsections']++;
  76         course_create_sections_if_missing($course, $courseformatoptions['numsections']);
  77     } else {
  78         // Remove a section.
  79         $courseformatoptions['numsections']--;
  80     }
  81
  82     // Don't go less than 0, intentionally redirect silently (for the case of
  83     // double clicks).
  84     if ($courseformatoptions['numsections'] >= 0) {
  85         update_course((object)array('id' => $course->id,
  86             'numsections' => $courseformatoptions['numsections']));
  87     }
  88     if (!$returnurl) {
  89         $returnurl = course_get_url($course);
  90         $returnurl->set_anchor('changenumsections');
  91     }
  92
  93 } else if (course_get_format($course)->uses_sections() && $insertsection !== null) {
  94     if ($insertsection) {
  95         // Inserting sections at any position except in the very end requires capability to move sections.
  96         require_capability('moodle/course:movesections', context_course::instance($course->id));
  97     }
  98     $sections = [];
  99     for ($i = 0; $i < max($numsections, 1); $i ++) {
 100         $sections[] = course_create_section($course, $insertsection);
 101     }
 102     if (!$returnurl) {
 103         $returnurl = course_get_url($course, $sections[0]->section,
 104             ($sectionreturn !== null) ? ['sr' => $sectionreturn] : []);
 105     }
 106 }
 107
 108 // Redirect to where we were..
 109 redirect($returnurl);