admin/roles/override.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Lets you override role definitions in contexts.
  19  *
  20  * @package    core_role
  21  * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 require('../../config.php');
  26
  27 $contextid = required_param('contextid', PARAM_INT);
  28 $roleid    = required_param('roleid', PARAM_INT);
  29
  30 list($context, $course, $cm) = get_context_info_array($contextid);
  31
  32 $url = new moodle_url('/admin/roles/override.php', array('contextid' => $contextid, 'roleid' => $roleid));
  33
  34 if ($course) {
  35     $isfrontpage = ($course->id == SITEID);
  36 } else {
  37     $isfrontpage = false;
  38     if ($context->contextlevel == CONTEXT_USER) {
  39         $course = $DB->get_record('course', array('id'=>optional_param('courseid', SITEID, PARAM_INT)), '*', MUST_EXIST);
  40         $user = $DB->get_record('user', array('id'=>$context->instanceid), '*', MUST_EXIST);
  41         $url->param('courseid', $course->id);
  42         $url->param('userid', $user->id);
  43     } else {
  44         $course = $SITE;
  45     }
  46 }
  47
  48 // Security first.
  49 require_login($course, false, $cm);
  50 $safeoverridesonly = false;
  51 if (!has_capability('moodle/role:override', $context)) {
  52     require_capability('moodle/role:safeoverride', $context);
  53     $safeoverridesonly = true;
  54 }
  55 $PAGE->set_url($url);
  56 $PAGE->set_pagelayout('admin');
  57
  58 if ($context->contextlevel == CONTEXT_USER and $USER->id != $context->instanceid) {
  59     $PAGE->navigation->extend_for_user($user);
  60     $PAGE->set_context(context_course::instance($course->id));
  61     navigation_node::override_active_url(new moodle_url('/admin/roles/permissions.php',
  62         array('contextid'=>$context->id, 'userid'=>$context->instanceid, 'courseid'=>$course->id)));
  63
  64 } else {
  65     $PAGE->set_context($context);
  66     navigation_node::override_active_url(new moodle_url('/admin/roles/permissions.php', array('contextid'=>$context->id)));
  67 }
  68
  69 $courseid = $course->id;
  70
  71 $returnurl = new moodle_url('/admin/roles/permissions.php', array('contextid' => $context->id));
  72
  73 // Handle the cancel button.
  74 if (optional_param('cancel', false, PARAM_BOOL)) {
  75     redirect($returnurl);
  76 }
  77
  78 $role = $DB->get_record('role', array('id'=>$roleid), '*', MUST_EXIST);
  79
  80 // These are needed early.
  81 $assignableroles  = get_assignable_roles($context, ROLENAME_BOTH);
  82 list($overridableroles, $overridecounts, $nameswithcounts) = get_overridable_roles($context, ROLENAME_BOTH, true);
  83
  84 // Work out an appropriate page title.
  85 $contextname = $context->get_context_name();
  86 $straction = get_string('overrideroles', 'core_role'); // Used by tabs.php.
  87 $a = (object)array('context' => $contextname, 'role' => $overridableroles[$roleid]);
  88 $title = get_string('overridepermissionsforrole', 'core_role', $a);
  89
  90 $currenttab = 'permissions';
  91
  92 $PAGE->set_title($title);
  93 $PAGE->activityheader->disable();
  94 $PAGE->navbar->add($straction);
  95 switch ($context->contextlevel) {
  96     case CONTEXT_SYSTEM:
  97         throw new \moodle_exception('cannotoverridebaserole', 'error');
  98         break;
  99     case CONTEXT_USER:
 100         $fullname = fullname($user, has_capability('moodle/site:viewfullnames', $context));
 101         $PAGE->set_heading($fullname);
 102         $showroles = 1;
 103         break;
 104     case CONTEXT_COURSECAT:
 105         $PAGE->set_heading($SITE->fullname);
 106         break;
 107     case CONTEXT_COURSE:
 108         if ($isfrontpage) {
 109             $PAGE->set_heading(get_string('frontpage', 'admin'));
 110         } else {
 111             $PAGE->set_heading($course->fullname);
 112         }
 113         break;
 114     case CONTEXT_MODULE:
 115         $PAGE->set_heading($context->get_context_name(false));
 116         $PAGE->set_cacheable(false);
 117         break;
 118     case CONTEXT_BLOCK:
 119         $PAGE->set_heading($PAGE->course->fullname);
 120         break;
 121 }
 122
 123 // Make sure this user can override that role.
 124 if (empty($overridableroles[$roleid])) {
 125     $a = new stdClass;
 126     $a->roleid = $roleid;
 127     $a->context = $contextname;
 128     throw new \moodle_exception('cannotoverriderolehere', '', $context->get_url(), $a);
 129 }
 130
 131 // If we are actually overriding a role, create the table object, and save changes if appropriate.
 132 $overridestable = new core_role_override_permissions_table_advanced($context, $roleid, $safeoverridesonly);
 133 $overridestable->read_submitted_permissions();
 134
 135 if (optional_param('savechanges', false, PARAM_BOOL) && confirm_sesskey()) {
 136     $overridestable->save_changes();
 137     $rolename = $overridableroles[$roleid];
 138
 139     redirect($returnurl);
 140 }
 141
 142 // Finally start page output.
 143 echo $OUTPUT->header();
 144 echo $OUTPUT->heading_with_help($title, 'overridepermissions', 'core_role');
 145
 146 // Show UI for overriding roles.
 147 if (!empty($capabilities)) {
 148     echo $OUTPUT->box(get_string('nocapabilitiesincontext', 'core_role'), 'generalbox boxaligncenter');
 149
 150 } else {
 151     // Print the capabilities overrideable in this context.
 152     echo $OUTPUT->box_start('generalbox capbox');
 153     echo html_writer::start_tag('form', array('id'=>'overrideform', 'action'=>$PAGE->url->out(), 'method'=>'post'));
 154     echo html_writer::start_tag('div');
 155     echo html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>'sesskey', 'value'=>sesskey()));
 156     echo html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>'roleid', 'value'=>$roleid));
 157     echo html_writer::tag('p', get_string('highlightedcellsshowinherit', 'core_role'), array('class'=>'overridenotice'));
 158
 159     $overridestable->display();
 160     if ($overridestable->has_locked_capabilities()) {
 161         echo '<p class="overridenotice">' . get_string('safeoverridenotice', 'core_role') . "</p>\n";
 162     }
 163
 164     echo html_writer::start_tag('div', array('class'=>'submit_buttons'));
 165     $attrs = array('type'=>'submit', 'name'=>'savechanges', 'value'=>get_string('savechanges'), 'class'=>'btn btn-primary');
 166     echo html_writer::empty_tag('input', $attrs);
 167     $attrs = array('type' => 'submit', 'name' => 'cancel', 'value' => get_string('cancel'),
 168         'class' => 'btn btn-secondary ml-1');
 169     echo html_writer::empty_tag('input', $attrs);
 170     echo html_writer::end_tag('div');
 171     echo html_writer::end_tag('div');
 172     echo html_writer::end_tag('form');
 173     echo $OUTPUT->box_end();
 174 }
 175
 176 // Print a form to swap roles, and a link back to the all roles list.
 177 echo html_writer::start_tag('div', array('class'=>'backlink'));
 178 $select = new single_select($PAGE->url, 'roleid', $nameswithcounts, $roleid, null);
 179 $select->label = get_string('overrideanotherrole', 'core_role');
 180 echo $OUTPUT->render($select);
 181 echo html_writer::tag('p', html_writer::tag('a', get_string('backtoallroles', 'core_role'), array('href'=>$returnurl)));
 182 echo html_writer::end_tag('div');
 183
 184 echo $OUTPUT->footer();