<?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/>.

/**
 * External user API
 *
 * @package    moodlecore
 * @subpackage user
 * @copyright  2009 Moodle Pty Ltd (http://moodle.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */


/**
 * Creates a user
 *
 * @param object $user user to create
 * @return int id of the newly created user
 */
function user_create_user($user) {
    global $DB;

    // set the timecreate field to the current time
    if (!is_object($user)) {
            $user = (object)$user;
    }

    // save the password in a temp value for later
    if (isset($user->password)) {
        $userpassword = $user->password;
        unset($user->password);
    }

    $user->timecreated = time();
    $user->timemodified = $user->timecreated;

    // insert the user into the database
    $newuserid = $DB->insert_record('user', $user);

    // trigger user_created event on the full database user row
    $newuser = $DB->get_record('user', array('id' => $newuserid));
    events_trigger('user_created', $newuser);

    // create USER context for this user
    get_context_instance(CONTEXT_USER, $newuserid);

    // update user password if necessary
    if (isset($userpassword)) {
        update_internal_user_password($newuser, $userpassword);
    }

    return $newuserid;

}

/**
 * Update a user with a user object (will compare against the ID)
 *
 * @param object $user the user to update
 */
function user_update_user($user) {
    global $DB;

    // set the timecreate field to the current time
    if (!is_object($user)) {
            $user = (object)$user;
    }

    // unset password here, for updating later
    if (isset($user->password)) {
        $passwd = $user->password;
        unset($user->password);
    }

    $user->timemodified = time();
    $DB->update_record('user', $user);

    // trigger user_updated event on the full database user row
    $updateduser = $DB->get_record('user', array('id' => $user->id));
    events_trigger('user_updated', $updateduser);

    // if password was set, then update its hash
    if (isset($passwd)) {
        update_internal_user_password($updateduser, $passwd);
    }

}

/**
 * Marks user deleted in internal user database and notifies the auth plugin.
 * Also unenrols user from all roles and does other cleanup.
 *
 * @todo Decide if this transaction is really needed (look for internal TODO:)
 * @param object $user Userobject before delete    (without system magic quotes)
 * @return boolean success
 */
function user_delete_user($user) {
    return delete_user($user);
}

/**
 * Get users by id
 * @param array $userids id of users to retrieve
 *
 */
function user_get_users_by_id($userids) {
    global $DB;
    return $DB->get_records_list('user', 'id', $userids);
}