mod/lesson/lesson.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  * Handles lesson actions
  20  *
  21  * ACTIONS handled are:
  22  *    confirmdelete
  23  *    delete
  24  *    move
  25  *    moveit
  26  * @package    mod
  27  * @subpackage lesson
  28  * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  29  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  30  **/
  31
  32 require_once("../../config.php");
  33 require_once($CFG->dirroot.'/mod/lesson/locallib.php');
  34
  35 $id     = required_param('id', PARAM_INT);         // Course Module ID
  36 $action = required_param('action', PARAM_ALPHA);   // Action
  37 $pageid = required_param('pageid', PARAM_INT);
  38
  39 $cm = get_coursemodule_from_id('lesson', $id, 0, false, MUST_EXIST);
  40 $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
  41 $lesson = new lesson($DB->get_record('lesson', array('id' => $cm->instance), '*', MUST_EXIST));
  42
  43 require_login($course, false, $cm);
  44
  45 $url = new moodle_url('/mod/lesson/lesson.php', array('id'=>$id,'action'=>$action));
  46 $PAGE->set_url($url);
  47
  48 $context = context_module::instance($cm->id);
  49 require_capability('mod/lesson:edit', $context);
  50 require_sesskey();
  51
  52 $lessonoutput = $PAGE->get_renderer('mod_lesson');
  53
  54 /// Process the action
  55 switch ($action) {
  56     case 'confirmdelete':
  57         $PAGE->navbar->add(get_string($action, 'lesson'));
  58
  59         $thispage = $lesson->load_page($pageid);
  60
  61         echo $lessonoutput->header($lesson, $cm, '', false, null, get_string('deletingpage', 'lesson', format_string($thispage->title)));
  62         echo $OUTPUT->heading(get_string("deletingpage", "lesson", format_string($thispage->title)));
  63         // print the jumps to this page
  64         $params = array("lessonid" => $lesson->id, "pageid" => $pageid);
  65         if ($answers = $DB->get_records_select("lesson_answers", "lessonid = :lessonid AND jumpto = :pageid + 1", $params)) {
  66             echo $OUTPUT->heading(get_string("thefollowingpagesjumptothispage", "lesson"));
  67             echo "<p align=\"center\">\n";
  68             foreach ($answers as $answer) {
  69                 if (!$title = $DB->get_field("lesson_pages", "title", array("id" => $answer->pageid))) {
  70                     print_error('cannotfindpagetitle', 'lesson');
  71                 }
  72                 echo $title."<br />\n";
  73             }
  74         }
  75         echo $OUTPUT->confirm(get_string("confirmdeletionofthispage","lesson"),"lesson.php?action=delete&id=$cm->id&pageid=$pageid","view.php?id=$cm->id");
  76
  77         break;
  78     case 'move':
  79         $PAGE->navbar->add(get_string($action, 'lesson'));
  80
  81         $title = $DB->get_field("lesson_pages", "title", array("id" => $pageid));
  82
  83         echo $lessonoutput->header($lesson, $cm, '', false, null, get_string('moving', 'lesson', format_String($title)));
  84         echo $OUTPUT->heading(get_string("moving", "lesson", format_string($title)));
  85
  86         $params = array ("lessonid" => $lesson->id, "prevpageid" => 0);
  87         if (!$page = $DB->get_record_select("lesson_pages", "lessonid = :lessonid AND prevpageid = :prevpageid", $params)) {
  88             print_error('cannotfindfirstpage', 'lesson');
  89         }
  90
  91         echo "<center><table cellpadding=\"5\" border=\"1\">\n";
  92         echo "<tr><td><a href=\"lesson.php?id=$cm->id&amp;sesskey=".sesskey()."&amp;action=moveit&amp;pageid=$pageid&amp;after=0\"><small>".
  93             get_string("movepagehere", "lesson")."</small></a></td></tr>\n";
  94         while (true) {
  95             if ($page->id != $pageid) {
  96                 if (!$title = trim(format_string($page->title))) {
  97                     $title = "<< ".get_string("notitle", "lesson")."  >>";
  98                 }
  99                 echo "<tr><td><b>$title</b></td></tr>\n";
 100                 echo "<tr><td><a href=\"lesson.php?id=$cm->id&amp;sesskey=".sesskey()."&amp;action=moveit&amp;pageid=$pageid&amp;after={$page->id}\"><small>".
 101                     get_string("movepagehere", "lesson")."</small></a></td></tr>\n";
 102             }
 103             if ($page->nextpageid) {
 104                 if (!$page = $DB->get_record("lesson_pages", array("id" => $page->nextpageid))) {
 105                     print_error('cannotfindnextpage', 'lesson');
 106                 }
 107             } else {
 108                 // last page reached
 109                 break;
 110             }
 111         }
 112         echo "</table>\n";
 113
 114         break;
 115     case 'delete':
 116         $thispage = $lesson->load_page($pageid);
 117         $thispage->delete();
 118         redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");
 119         break;
 120     case 'moveit':
 121         $after = (int)required_param('after', PARAM_INT); // target page
 122
 123         $pages = $lesson->load_all_pages();
 124
 125         if (!array_key_exists($pageid, $pages) || ($after!=0 && !array_key_exists($after, $pages))) {
 126             print_error('cannotfindpages', 'lesson', "$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");
 127         }
 128         $pagetomove = clone($pages[$pageid]);
 129         unset($pages[$pageid]);
 130
 131         $pageids = array();
 132         if ($after === 0) {
 133             $pageids['p0'] = $pageid;
 134         }
 135         foreach ($pages as $page) {
 136             $pageids[] = $page->id;
 137             if ($page->id == $after) {
 138                 $pageids[] = $pageid;
 139             }
 140         }
 141
 142         $pageidsref = $pageids;
 143         reset($pageidsref);
 144         $prev = 0;
 145         $next = next($pageidsref);
 146         foreach ($pageids as $pid) {
 147             if ($pid === $pageid) {
 148                 $page = $pagetomove;
 149             } else {
 150                 $page = $pages[$pid];
 151             }
 152             if ($page->prevpageid != $prev || $page->nextpageid != $next) {
 153                 $page->move($next, $prev);
 154             }
 155             $prev = $page->id;
 156             $next = next($pageidsref);
 157             if (!$next) {
 158                 $next = 0;
 159             }
 160         }
 161
 162         redirect("$CFG->wwwroot/mod/lesson/edit.php?id=$cm->id");
 163         break;
 164     default:
 165         print_error('unknowaction');
 166         break;
 167 }
 168
 169 echo $lessonoutput->footer();