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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402]

   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   * Existing user selector.
  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  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * User selector subclass for the list of users who already have the role in
  29   * question on the assign roles page.
  30   */
  31  class core_role_existing_role_holders extends core_role_assign_user_selector_base {
  32  
  33      public function find_users($search) {
  34          global $DB;
  35  
  36          list($wherecondition, $params) = $this->search_sql($search, 'u');
  37          list($ctxcondition, $ctxparams) = $DB->get_in_or_equal($this->context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'ctx');
  38          $params = array_merge($params, $ctxparams, $this->userfieldsparams);
  39          $params['roleid'] = $this->roleid;
  40  
  41          list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext, $this->userfieldsmappings);
  42          $params = array_merge($params, $sortparams);
  43  
  44          $fields = "SELECT ra.id AS raid, u.id, " . $this->userfieldsselects . ", ra.contextid, ra.component ";
  45          $countfields = "SELECT COUNT(1) ";
  46          $sql = "FROM {role_assignments} ra
  47                    JOIN {user} u ON u.id = ra.userid
  48                    JOIN {context} ctx ON ra.contextid = ctx.id
  49                         $this->userfieldsjoin
  50                   WHERE $wherecondition
  51                         AND ctx.id $ctxcondition
  52                         AND ra.roleid = :roleid";
  53           $order = " ORDER BY ctx.depth DESC, ra.component, $sort";
  54  
  55          if (!$this->is_validating()) {
  56              $existinguserscount = $DB->count_records_sql($countfields . $sql, $params);
  57              if ($existinguserscount > $this->maxusersperpage) {
  58                  return $this->too_many_results($search, $existinguserscount);
  59              }
  60          }
  61  
  62          $contextusers = $DB->get_records_sql($fields . $sql . $order, $params);
  63  
  64          // No users at all.
  65          if (empty($contextusers)) {
  66              return array();
  67          }
  68  
  69          // We have users. Out put them in groups by context depth.
  70          // To help the loop below, tack a dummy user on the end of the results
  71          // array, to trigger output of the last group.
  72          $dummyuser = new stdClass;
  73          $dummyuser->contextid = 0;
  74          $dummyuser->id = 0;
  75          $dummyuser->component = '';
  76          $contextusers[] = $dummyuser;
  77          $results = array(); // The results array we are building up.
  78          $doneusers = array(); // Ensures we only list each user at most once.
  79          $currentcontextid = $this->context->id;
  80          $currentgroup = array();
  81          foreach ($contextusers as $user) {
  82              if (isset($doneusers[$user->id])) {
  83                  continue;
  84              }
  85              $doneusers[$user->id] = 1;
  86              if ($user->contextid != $currentcontextid) {
  87                  // We have got to the end of the previous group. Add it to the results array.
  88                  if ($currentcontextid == $this->context->id) {
  89                      $groupname = $this->this_con_group_name($search, count($currentgroup));
  90                  } else {
  91                      $groupname = $this->parent_con_group_name($search, $currentcontextid);
  92                  }
  93                  $results[$groupname] = $currentgroup;
  94                  // Get ready for the next group.
  95                  $currentcontextid = $user->contextid;
  96                  $currentgroup = array();
  97              }
  98              // Add this user to the group we are building up.
  99              unset($user->contextid);
 100              if ($currentcontextid != $this->context->id) {
 101                  $user->disabled = true;
 102              }
 103              if ($user->component !== '') {
 104                  // Bad luck, you can tweak only manual role assignments.
 105                  $user->disabled = true;
 106              }
 107              unset($user->component);
 108              $currentgroup[$user->id] = $user;
 109          }
 110  
 111          return $results;
 112      }
 113  
 114      protected function this_con_group_name($search, $numusers) {
 115          if ($this->context->contextlevel == CONTEXT_SYSTEM) {
 116              // Special case in the System context.
 117              if ($search) {
 118                  return get_string('extusersmatching', 'core_role', $search);
 119              } else {
 120                  return get_string('extusers', 'core_role');
 121              }
 122          }
 123          $contexttype = context_helper::get_level_name($this->context->contextlevel);
 124          if ($search) {
 125              $a = new stdClass;
 126              $a->search = $search;
 127              $a->contexttype = $contexttype;
 128              if ($numusers) {
 129                  return get_string('usersinthisxmatching', 'core_role', $a);
 130              } else {
 131                  return get_string('noneinthisxmatching', 'core_role', $a);
 132              }
 133          } else {
 134              if ($numusers) {
 135                  return get_string('usersinthisx', 'core_role', $contexttype);
 136              } else {
 137                  return get_string('noneinthisx', 'core_role', $contexttype);
 138              }
 139          }
 140      }
 141  
 142      protected function parent_con_group_name($search, $contextid) {
 143          $context = context::instance_by_id($contextid);
 144          $contextname = $context->get_context_name(true, true);
 145          if ($search) {
 146              $a = new stdClass;
 147              $a->contextname = $contextname;
 148              $a->search = $search;
 149              return get_string('usersfrommatching', 'core_role', $a);
 150          } else {
 151              return get_string('usersfrom', 'core_role', $contextname);
 152          }
 153      }
 154  }