Proyectos de Subversion Moodle

<?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/>.

/**

 * 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();

require_once($CFG->dirroot.'/user/selector/lib.php');

/**

 * User selector subclass for the selection of users in the check permissions page.

 *

 * @copyright 2012 Petr Skoda {@link http://skodak.org}

 */

class core_role_check_users_selector extends user_selector_base {

    /** @var bool limit listing of users to enrolled only */

    protected $onlyenrolled;

    /**

     * Constructor.

     *

     * @param string $name the control name/id for use in the HTML.

     * @param array $options other options needed to construct this selector.

     * You must be able to clone a userselector by doing new get_class($us)($us->get_name(), $us->get_options());

     */

    public function __construct($name, $options) {

        if (!isset($options['multiselect'])) {

            $options['multiselect'] = false;

        }

        $options['includecustomfields'] = true;

        parent::__construct($name, $options);

        $coursecontext = $this->accesscontext->get_course_context(false);

        if ($coursecontext and $coursecontext->id != SITEID and !has_capability('moodle/role:manage', $coursecontext)) {

            // Prevent normal teachers from looking up all users.

            $this->onlyenrolled = true;

        } else {

            $this->onlyenrolled = false;

        }

    }

    public function find_users($search) {

        global $DB;

        list($wherecondition, $params) = $this->search_sql($search, 'u');

        $params = array_merge($params, $this->userfieldsparams);

        $fields      = 'SELECT u.id, ' . $this->userfieldsselects;

        $countfields = 'SELECT COUNT(1)';

        $coursecontext = $this->accesscontext->get_course_context(false);

        if ($coursecontext and $coursecontext != SITEID) {

            $sql1 = " FROM {user} u

                      JOIN (SELECT DISTINCT subu.id

                              FROM {user} subu

                              JOIN {user_enrolments} ue ON (ue.userid = subu.id)

                              JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :courseid1)

                           ) subq ON subq.id = u.id

                           $this->userfieldsjoin

                     WHERE $wherecondition";

            $params['courseid1'] = $coursecontext->instanceid;

            if ($this->onlyenrolled) {

                $sql2 = null;

            } else {

                $sql2 = " FROM {user} u

                     LEFT JOIN ({user_enrolments} ue

                                JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :courseid2)) ON (ue.userid = u.id)

                               $this->userfieldsjoin

                         WHERE $wherecondition

                               AND ue.id IS NULL";

                $params['courseid2'] = $coursecontext->instanceid;

            }

        } else {

            if ($this->onlyenrolled) {

                // Bad luck, current user may not view only enrolled users.

                return array();

            }

            $sql1 = null;

            $sql2 = " FROM {user} u

                           $this->userfieldsjoin

                     WHERE $wherecondition";

        }

        $params['contextid'] = $this->accesscontext->id;

        list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext, $this->userfieldsmappings);

        $order = ' ORDER BY ' . $sort;

        $result = array();

        if ($search) {

            $groupname1 = get_string('enrolledusersmatching', 'enrol', $search);

            $groupname2 = get_string('potusersmatching', 'core_role', $search);

        } else {

            $groupname1 = get_string('enrolledusers', 'enrol');

            $groupname2 = get_string('potusers', 'core_role');

        }

        if ($sql1) {

            $enrolleduserscount = $DB->count_records_sql($countfields . $sql1, $params);

            if (!$this->is_validating() and $enrolleduserscount > $this->maxusersperpage) {

                $result[$groupname1] = array();

                $toomany = $this->too_many_results($search, $enrolleduserscount);

                $result[implode(' - ', array_keys($toomany))] = array();

            } else {

                $enrolledusers = $DB->get_records_sql($fields . $sql1 . $order, array_merge($params, $sortparams));

                if ($enrolledusers) {

                    $result[$groupname1] = $enrolledusers;

                }

            }

            if ($sql2) {

                $result[''] = array();

            }

        }

        if ($sql2) {

            $otheruserscount = $DB->count_records_sql($countfields . $sql2, $params);

            if (!$this->is_validating() and $otheruserscount > $this->maxusersperpage) {

                $result[$groupname2] = array();

                $toomany = $this->too_many_results($search, $otheruserscount);

                $result[implode(' - ', array_keys($toomany))] = array();

            } else {

                $otherusers = $DB->get_records_sql($fields . $sql2 . $order, array_merge($params, $sortparams));

                if ($otherusers) {

                    $result[$groupname2] = $otherusers;

                }

            }

        }

        return $result;

    }

    protected function get_options() {

        global $CFG;

        $options = parent::get_options();

        $options['file'] = $CFG->admin . '/roles/lib.php';

        return $options;

    }

}