Current Path : C:/Users/Mahmood/Desktop/moodle/mod/chat/ |
Current File : C:/Users/Mahmood/Desktop/moodle/mod/chat/chat_ajax.php |
<?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/>. define('AJAX_SCRIPT', true); require(__DIR__.'/../../config.php'); require_once(__DIR__ . '/lib.php'); $action = optional_param('action', '', PARAM_ALPHANUM); $beepid = optional_param('beep', '', PARAM_RAW); $chatsid = required_param('chat_sid', PARAM_ALPHANUM); $theme = required_param('theme', PARAM_ALPHANUMEXT); $chatmessage = optional_param('chat_message', '', PARAM_RAW); $chatlasttime = optional_param('chat_lasttime', 0, PARAM_INT); $chatlastrow = optional_param('chat_lastrow', 1, PARAM_INT); if (!confirm_sesskey()) { throw new moodle_exception('invalidsesskey', 'error'); } if (!$chatuser = $DB->get_record('chat_users', array('sid' => $chatsid))) { throw new moodle_exception('notlogged', 'chat'); } if (!$chat = $DB->get_record('chat', array('id' => $chatuser->chatid))) { throw new moodle_exception('invaliduserid', 'error'); } if (!$course = $DB->get_record('course', array('id' => $chat->course))) { throw new moodle_exception('invalidcourseid', 'error'); } if (!$cm = get_coursemodule_from_instance('chat', $chat->id, $course->id)) { throw new moodle_exception('invalidcoursemodule', 'error'); } if (!isloggedin()) { throw new moodle_exception('notlogged', 'chat'); } // Set up $PAGE so that format_text will work properly. $PAGE->set_cm($cm, $course, $chat); $PAGE->set_url('/mod/chat/chat_ajax.php', array('chat_sid' => $chatsid)); require_login($course, false, $cm); $context = context_module::instance($cm->id); require_capability('mod/chat:chat', $context); ob_start(); header('Expires: Sun, 28 Dec 1997 09:32:45 GMT'); header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); header('Cache-Control: no-cache, must-revalidate'); header('Pragma: no-cache'); header('Content-Type: text/html; charset=utf-8'); switch ($action) { case 'init': $users = chat_get_users($chatuser->chatid, $chatuser->groupid, $cm->groupingid); $users = chat_format_userlist($users, $course); $response['users'] = $users; echo json_encode($response); break; case 'chat': \core\session\manager::write_close(); chat_delete_old_users(); $chatmessage = clean_text($chatmessage, FORMAT_MOODLE); if (!empty($beepid)) { $chatmessage = 'beep '.$beepid; } if (!empty($chatmessage)) { chat_send_chatmessage($chatuser, $chatmessage, 0, $cm); $chatuser->lastmessageping = time() - 2; $DB->update_record('chat_users', $chatuser); // Response OK message. echo json_encode(true); ob_end_flush(); } break; case 'update': if ((time() - $chatlasttime) > $CFG->chat_old_ping) { chat_delete_old_users(); } if ($latestmessage = chat_get_latest_message($chatuser->chatid, $chatuser->groupid)) { $chatnewlasttime = $latestmessage->timestamp; } else { $chatnewlasttime = 0; } if ($chatlasttime == 0) { $chatlasttime = time() - $CFG->chat_old_ping; } $messages = chat_get_latest_messages($chatuser, $chatlasttime); if (!empty($messages)) { $num = count($messages); } else { $num = 0; } $chatnewrow = ($chatlastrow + $num) % 2; $senduserlist = false; if ($messages && ($chatlasttime != $chatnewlasttime)) { foreach ($messages as $n => &$message) { $tmp = new stdClass(); // When somebody enter room, user list will be updated. if (!empty($message->issystem)) { $senduserlist = true; } if ($html = chat_format_message_theme($message, $chatuser, $USER, $cm->groupingid, $theme)) { $message->mymessage = ($USER->id == $message->userid); $message->message = $html->html; if (!empty($html->type)) { $message->type = $html->type; } } else { unset($messages[$n]); } } } if ($senduserlist) { // Return users when system message arrives. $users = chat_format_userlist(chat_get_users($chatuser->chatid, $chatuser->groupid, $cm->groupingid), $course); $response['users'] = $users; } $DB->set_field('chat_users', 'lastping', time(), array('id' => $chatuser->id)); $response['lasttime'] = $chatnewlasttime; $response['lastrow'] = $chatnewrow; if ($messages) { $response['msgs'] = $messages; } echo json_encode($response); header('Content-Length: ' . ob_get_length()); ob_end_flush(); break; default: break; }