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239 lines
9.2 KiB
239 lines
9.2 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* This is the Chat library for Chamilo.
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* Include/require it in your code to use its functionality.
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*
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* @package chamilo.library.chat
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*/
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/**
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* Chat class
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*/
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class Chat extends Model {
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var $table;
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var $columns = array('id', 'from_user','to_user','message','sent','recd');
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var $window_list = array();
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/**
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* The contructor sets the chat table name and the window_list attribute
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* @return object Object reference
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*/
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public function __construct() {
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$this->table = Database::get_main_table(TABLE_MAIN_CHAT);
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$this->window_list = $_SESSION['window_list'] = isset($_SESSION['window_list']) ? $_SESSION['window_list'] : array();
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}
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/**
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* Get user chat status
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* @return int 0 if disconnected, 1 if connected
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*/
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function get_user_status() {
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$status = UserManager::get_extra_user_data_by_field(api_get_user_id(), 'user_chat_status', false, true);
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return $status['user_chat_status'];
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}
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/*
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* Set user chat status
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* @param int 0 if disconnected, 1 if connected
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* @return void
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*/
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function set_user_status($status) {
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UserManager::update_extra_field_value(api_get_user_id(), 'user_chat_status', $status);
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}
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/*
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* Starts a chat session and returns JSON array of status and chat history
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* @return void (prints output in JSON format)
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*/
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public function start_session() {
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$items = array();
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if (isset($_SESSION['chatHistory'])) {
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$items = $_SESSION['chatHistory'];
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}
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//print_r($items);
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$return = array('user_status' => $this->get_user_status(), 'me' => get_lang('Me'), 'items' => $items);
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echo json_encode($return);
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exit;
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}
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/**
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* Refreshes the chat windows (usually called every x seconds through AJAX)
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* @return void (prints JSON array of chat windows)
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*/
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public function heartbeat() {
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$to_user_id = api_get_user_id();
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$minutes = 60;
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$now = time() - $minutes*60;
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$now = api_get_utc_datetime($now);
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//OR sent > '$now'
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$sql = "SELECT * FROM ".$this->table."
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WHERE to_user = '".intval($to_user_id)."' AND ( recd = 0 ) ORDER BY id ASC";
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$result = Database::query($sql);
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$chat_list = array();
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while ($chat = Database::fetch_array($result,'ASSOC')) {
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$chat_list[$chat['from_user']]['items'][] = $chat;
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}
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$items = array();
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foreach ($chat_list as $from_user_id => $rows) {
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$rows = $rows['items'];
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$user_info = api_get_user_info($from_user_id, true);
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//Cleaning tsChatBoxes
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unset($_SESSION['tsChatBoxes'][$from_user_id]);
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foreach ($rows as $chat) {
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$chat['message'] = Security::remove_XSS($chat['message']);
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$item = array( 's' => '0',
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'f' => $from_user_id,
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'm' => $chat['message'],
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'username' => $user_info['complete_name'],
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'id' => $chat['id']
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);
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$items[$from_user_id]['items'][] = $item;
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$items[$from_user_id]['user_info']['user_name'] = $user_info['complete_name'];
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$items[$from_user_id]['user_info']['online'] = $user_info['user_is_online'];
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$_SESSION['openChatBoxes'][$from_user_id] = api_strtotime($chat['sent'],'UTC');
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}
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$_SESSION['chatHistory'][$from_user_id]['items'][] = $item;
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$_SESSION['chatHistory'][$from_user_id]['user_info']['user_name'] = $user_info['complete_name'];
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$_SESSION['chatHistory'][$from_user_id]['user_info']['online'] = $user_info['user_is_online'];
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}
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if (!empty($_SESSION['openChatBoxes'])) {
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foreach ($_SESSION['openChatBoxes'] as $user_id => $time) {
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if (!isset($_SESSION['tsChatBoxes'][$user_id])) {
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$now = time() - $time;
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$time = api_convert_and_format_date($time, DATE_TIME_FORMAT_SHORT_TIME_FIRST);
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$message = sprintf(get_lang('SentAtX'), $time);
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if ($now > 180) {
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$item = array('s' => '2', 'f' => $user_id, 'm' => $message);
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if (isset($_SESSION['chatHistory'][$user_id])) {
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$_SESSION['chatHistory'][$user_id]['items'][] = $item;
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}
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$_SESSION['tsChatBoxes'][$user_id] = 1;
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}
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}
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}
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}
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//print_r($_SESSION['chatHistory']);
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/*
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var_dump($_SESSION['openChatBoxes']);
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var_dump($_SESSION['tsChatBoxes']);
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var_dump($_SESSION['chatHistory']);
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var_dump($items);
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*/
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//print_r($_SESSION['chatHistory']);
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$sql = "UPDATE ".$this->table." SET recd = 1 WHERE to_user = '".$to_user_id."' AND recd = 0";
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Database::query($sql);
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if ($items != '') {
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//$items = substr($items, 0, -1);
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}
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echo json_encode(array('items' => $items));
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}
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/*
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* Returns an array of messages inside a chat session with a specific user
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* @param int The ID of the user with whom the current user is chatting
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* @return array Messages list
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*/
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function box_session($user_id) {
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$items = array();
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if (isset($_SESSION['chatHistory'][$user_id])) {
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$items = $_SESSION['chatHistory'][$user_id];
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}
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return $items;
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}
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/**
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* Saves into session the fact that a chat window exists with the given user
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* @param int The ID of the user with whom the current user is chatting
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* @return void
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*/
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function save_window($user_id){
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$this->window_list[$user_id] = true;
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$_SESSION['window_list'] = $this->window_list;
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}
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/**
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* Sends a message from one user to another user
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* @param int The ID of the user sending the message
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* @param int The ID of the user receiving the message
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* @param string Message
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* @return void Prints "1"
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*/
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function send($from_user_id, $to_user_id, $message) {
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$user_friend_relation = SocialManager::get_relation_between_contacts($from_user_id, $to_user_id);
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if ($user_friend_relation == USER_RELATION_TYPE_FRIEND) {
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$user_info = api_get_user_info($to_user_id, true);
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$this->save_window($to_user_id);
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$_SESSION['openChatBoxes'][$to_user_id] = api_get_utc_datetime();
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$messagesan = self::sanitize($message);
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if (!isset($_SESSION['chatHistory'][$to_user_id])) {
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$_SESSION['chatHistory'][$to_user_id] = array();
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}
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$item = array ( "s" => "1",
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"f" => $from_user_id,
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"m" => $messagesan,
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"username" => get_lang('Me')
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);
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$_SESSION['chatHistory'][$to_user_id]['items'][] = $item;
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$_SESSION['chatHistory'][$to_user_id]['user_info']['user_name'] = $user_info['complete_name'];
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$_SESSION['chatHistory'][$to_user_id]['user_info']['online'] = $user_info['user_is_online'];
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unset($_SESSION['tsChatBoxes'][$to_user_id]);
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$params = array();
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$params['from_user'] = intval($from_user_id);
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$params['to_user'] = intval($to_user_id);
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$params['message'] = $message;
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$params['sent'] = api_get_utc_datetime();
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if (!empty($from_user_id) && !empty($to_user_id)) {
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$this->save($params);
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}
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//print_r($_SESSION['chatHistory']);
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echo "1";
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exit;
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} else {
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echo "0";
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exit;
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}
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}
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/**
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* Close a specific chat box (user ID taken from $_POST['chatbox'])
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* @return void Prints "1"
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*/
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function close() {
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unset($_SESSION['openChatBoxes'][$_POST['chatbox']]);
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unset($_SESSION['chatHistory'][$_POST['chatbox']]);
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echo "1";
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exit;
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}
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/**
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* Filter chat messages to avoid XSS or other JS
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* @param string Unfiltered message
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* @return string Filterd mssage
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*/
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function sanitize($text) {
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$text = htmlspecialchars($text, ENT_QUOTES);
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$text = str_replace("\n\r","\n",$text);
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$text = str_replace("\r\n","\n",$text);
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$text = str_replace("\n","<br>",$text);
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return $text;
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}
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}
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