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   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   * Library code used by the roles administration interfaces.
  19   *
  20   * @package    core_role
  21   * @copyright  2009 Petr Skoda {@link http://skodak.org}
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * Subclass of core_role_capability_table_base for use on the Permissions page.
  29   */
  30  class core_role_permissions_table extends core_role_capability_table_base {
  31      protected $contextname;
  32      protected $allowoverrides;
  33      protected $allowsafeoverrides;
  34      protected $overridableroles;
  35      protected $roles;
  36      protected $icons = array();
  37  
  38      /**
  39       * Constructor.
  40       * @param context $context the context this table relates to.
  41       * @param string $contextname $context->get_context_name() - to save recomputing.
  42       * @param array $allowoverrides
  43       * @param array $allowsafeoverrides
  44       * @param array $overridableroles
  45       */
  46      public function __construct($context, $contextname, $allowoverrides, $allowsafeoverrides, $overridableroles) {
  47          parent::__construct($context, 'permissions');
  48          $this->contextname = $contextname;
  49          $this->allowoverrides = $allowoverrides;
  50          $this->allowsafeoverrides = $allowsafeoverrides;
  51          $this->overridableroles = $overridableroles;
  52  
  53          $roles = get_all_roles($context);
  54          $this->roles = role_fix_names(array_reverse($roles, true), $context, ROLENAME_ALIAS, true);
  55  
  56      }
  57  
  58      protected function add_header_cells() {
  59          echo '<th>' . get_string('risks', 'core_role') . '</th>';
  60          echo '<th>' . get_string('neededroles', 'core_role') . '</th>';
  61          echo '<th>' . get_string('prohibitedroles', 'core_role') . '</th>';
  62      }
  63  
  64      protected function num_extra_columns() {
  65          return 3;
  66      }
  67  
  68      protected function add_row_cells($capability) {
  69          global $OUTPUT, $PAGE;
  70  
  71          $context = $this->context;
  72          $contextid = $this->context->id;
  73          $allowoverrides = $this->allowoverrides;
  74          $allowsafeoverrides = $this->allowsafeoverrides;
  75          $overridableroles = $this->overridableroles;
  76          $roles = $this->roles;
  77  
  78  
  79          list($needed, $forbidden) = get_roles_with_cap_in_context($context, $capability->name);
  80          $neededroles    = array();
  81          $forbiddenroles = array();
  82          $allowable      = $overridableroles;
  83          $forbitable     = $overridableroles;
  84          foreach ($neededroles as $id => $unused) {
  85              unset($allowable[$id]);
  86          }
  87          foreach ($forbidden as $id => $unused) {
  88              unset($allowable[$id]);
  89              unset($forbitable[$id]);
  90          }
  91  
  92          foreach ($roles as $id => $name) {
  93              if (isset($needed[$id])) {
  94                  $neededroles[$id] = $roles[$id];
  95                  if (isset($overridableroles[$id]) and ($allowoverrides or ($allowsafeoverrides and is_safe_capability($capability)))) {
  96                      $preventurl = new moodle_url($PAGE->url, array('contextid'=>$contextid, 'roleid'=>$id, 'capability'=>$capability->name, 'prevent'=>1));
  97                      $neededroles[$id] .= $OUTPUT->action_icon($preventurl, new pix_icon('t/delete', get_string('prevent', 'core_role')));
  98                  }
  99              }
 100          }
 101          $neededroles = implode(', ', $neededroles);
 102          foreach ($roles as $id => $name) {
 103              if (isset($forbidden[$id])  and ($allowoverrides or ($allowsafeoverrides and is_safe_capability($capability)))) {
 104                  $forbiddenroles[$id] = $roles[$id];
 105                  if (isset($overridableroles[$id]) and prohibit_is_removable($id, $context, $capability->name)) {
 106                      $unprohibiturl = new moodle_url($PAGE->url, array('contextid'=>$contextid, 'roleid'=>$id, 'capability'=>$capability->name, 'unprohibit'=>1));
 107                      $forbiddenroles[$id] .= $OUTPUT->action_icon($unprohibiturl, new pix_icon('t/delete', get_string('delete')));
 108                  }
 109              }
 110          }
 111          $forbiddenroles = implode(', ', $forbiddenroles);
 112  
 113          if ($allowable and ($allowoverrides or ($allowsafeoverrides and is_safe_capability($capability)))) {
 114              $allowurl = new moodle_url($PAGE->url, array('contextid'=>$contextid, 'capability'=>$capability->name, 'allow'=>1));
 115              $neededroles .= '<div class="allowmore">'.$OUTPUT->action_icon($allowurl, new pix_icon('t/add', get_string('allow', 'core_role'))).'</div>';
 116          }
 117  
 118          if ($forbitable and ($allowoverrides or ($allowsafeoverrides and is_safe_capability($capability)))) {
 119              $prohibiturl = new moodle_url($PAGE->url, array('contextid'=>$contextid, 'capability'=>$capability->name, 'prohibit'=>1));
 120              $forbiddenroles .= '<div class="prohibitmore">'.$OUTPUT->action_icon($prohibiturl, new pix_icon('t/add', get_string('prohibit', 'core_role'))).'</div>';
 121          }
 122  
 123          $risks = $this->get_risks($capability);
 124  
 125          echo '<td>' . $risks . '</td>';
 126          echo '<td>' . $neededroles . '</td>';
 127          echo '<td>' . $forbiddenroles . '</td>';
 128      }
 129  
 130      protected function get_risks($capability) {
 131          global $OUTPUT;
 132  
 133          $allrisks = get_all_risks();
 134          $risksurl = new moodle_url(get_docs_url(s(get_string('risks', 'core_role'))));
 135  
 136          $return = '';
 137  
 138          foreach ($allrisks as $type => $risk) {
 139              if ($risk & (int)$capability->riskbitmask) {
 140                  if (!isset($this->icons[$type])) {
 141                      $pixicon = new pix_icon('/i/' . str_replace('risk', 'risk_', $type), get_string($type . 'short', 'admin'));
 142                      $this->icons[$type] = $OUTPUT->action_icon($risksurl, $pixicon, new popup_action('click', $risksurl));
 143                  }
 144                  $return .= $this->icons[$type];
 145              }
 146          }
 147  
 148          return $return;
 149      }
 150  }