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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Existing user selector.
*
* @package core_role
* @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* User selector subclass for the list of users who already have the role in
* question on the assign roles page.
*/
class core_role_existing_role_holders extends core_role_assign_user_selector_base {
public function find_users($search) {
global $DB;
list($wherecondition, $params) = $this->search_sql($search, 'u');
list($ctxcondition, $ctxparams) = $DB->get_in_or_equal($this->context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'ctx');
$params = array_merge($params, $ctxparams);
$params['roleid'] = $this->roleid;
list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext);
$params = array_merge($params, $sortparams);
$fields = "SELECT ra.id AS raid," . $this->required_fields_sql('u') . ",ra.contextid,ra.component ";
$countfields = "SELECT COUNT(1) ";
$sql = "FROM {role_assignments} ra
JOIN {user} u ON u.id = ra.userid
JOIN {context} ctx ON ra.contextid = ctx.id
WHERE $wherecondition
AND ctx.id $ctxcondition
AND ra.roleid = :roleid";
$order = " ORDER BY ctx.depth DESC, ra.component, $sort";
if (!$this->is_validating()) {
$existinguserscount = $DB->count_records_sql($countfields . $sql, $params);
if ($existinguserscount > $this->maxusersperpage) {
return $this->too_many_results($search, $existinguserscount);
}
}
$contextusers = $DB->get_records_sql($fields . $sql . $order, $params);
// No users at all.
if (empty($contextusers)) {
return array();
}
// We have users. Out put them in groups by context depth.
// To help the loop below, tack a dummy user on the end of the results
// array, to trigger output of the last group.
$dummyuser = new stdClass;
$dummyuser->contextid = 0;
$dummyuser->id = 0;
$dummyuser->component = '';
$contextusers[] = $dummyuser;
$results = array(); // The results array we are building up.
$doneusers = array(); // Ensures we only list each user at most once.
$currentcontextid = $this->context->id;
$currentgroup = array();
foreach ($contextusers as $user) {
if (isset($doneusers[$user->id])) {
continue;
}
$doneusers[$user->id] = 1;
if ($user->contextid != $currentcontextid) {
// We have got to the end of the previous group. Add it to the results array.
if ($currentcontextid == $this->context->id) {
$groupname = $this->this_con_group_name($search, count($currentgroup));
} else {
$groupname = $this->parent_con_group_name($search, $currentcontextid);
}
$results[$groupname] = $currentgroup;
// Get ready for the next group.
$currentcontextid = $user->contextid;
$currentgroup = array();
}
// Add this user to the group we are building up.
unset($user->contextid);
if ($currentcontextid != $this->context->id) {
$user->disabled = true;
}
if ($user->component !== '') {
// Bad luck, you can tweak only manual role assignments.
$user->disabled = true;
}
unset($user->component);
$currentgroup[$user->id] = $user;
}
return $results;
}
protected function this_con_group_name($search, $numusers) {
if ($this->context->contextlevel == CONTEXT_SYSTEM) {
// Special case in the System context.
if ($search) {
return get_string('extusersmatching', 'core_role', $search);
} else {
return get_string('extusers', 'core_role');
}
}
$contexttype = context_helper::get_level_name($this->context->contextlevel);
if ($search) {
$a = new stdClass;
$a->search = $search;
$a->contexttype = $contexttype;
if ($numusers) {
return get_string('usersinthisxmatching', 'core_role', $a);
} else {
return get_string('noneinthisxmatching', 'core_role', $a);
}
} else {
if ($numusers) {
return get_string('usersinthisx', 'core_role', $contexttype);
} else {
return get_string('noneinthisx', 'core_role', $contexttype);
}
}
}
protected function parent_con_group_name($search, $contextid) {
$context = context::instance_by_id($contextid);
$contextname = $context->get_context_name(true, true);
if ($search) {
$a = new stdClass;
$a->contextname = $contextname;
$a->search = $search;
return get_string('usersfrommatching', 'core_role', $a);
} else {
return get_string('usersfrom', 'core_role', $contextname);
}
}
}