1<?php
2/**
3 * @package tikiwiki
4 */
5// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
6//
7// All Rights Reserved. See copyright.txt for details and a complete list of authors.
8// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
9// $Id$
10// Live Support CHAT server.
11// This PHP script handles all the messaging between the clients
12// and the server (this script). Messaging is done using a REST
13// model based on HTTP GET requests.
14// Clients use JavaScript to send messages to this server.
15//   clients of this server are:
16//   * The operator console
17//   * The operator chat window
18//   * The client chat window
19// Long includes and heavy operations should be avoided to maximize the
20// response time of this script which is critical.
21
22include "tiki-setup.php";
23header('Content-Type: text/xml');
24if ($prefs['feature_live_support'] != 'y') {
25	die;
26}
27include_once('lib/live_support/lslib.php');
28header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
29header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified
30header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
31header("Cache-Control: post-check=0, pre-check=0", false);
32header("Pragma: no-cache"); // HTTP/1.0
33// A user requests a chat
34if (isset($_REQUEST['request_chat'])) {
35	// The server receives a chat request
36	// if then inserts a row in the support_requests table
37	// with the name of the user (or anonymous) and the reason for
38	// the request.
39	// Operator windows polling this server will be notified of current
40	// 'active' chat requests
41	header("Content-type: text/plain");
42	$id = $lslib->new_user_request($_REQUEST['user'], $_REQUEST['tiki_user'], $_REQUEST['email'], $_REQUEST['reason']);
43	print ($id);
44}
45if (isset($_REQUEST['set_operator_status'])) {
46	$lslib->set_operator_status($_REQUEST['set_operator_status'], $_REQUEST['status']);
47}
48if (isset($_REQUEST['operators_online'])) {
49	if ($lslib->operators_online()) {
50		header("Content-type: image/png");
51		readfile('img/icons/live-support-on.png');
52	} else {
53		header("Content-type: image/png");
54		readfile('img/icons/live-support-off.png');
55	}
56}
57if (isset($_REQUEST['write'])) {
58	if ($_REQUEST['role'] == 'operator') {
59		$color = 'blue';
60	}
61	if ($_REQUEST['role'] == 'user') {
62		$color = 'black';
63	}
64	if ($_REQUEST['role'] == 'observer') {
65		$color = 'grey';
66	}
67	if (! strstr($_REQUEST['msg'], 'has left')) {
68		$_REQUEST['msg'] = '<span style="color:' . $color . ';">(' . $_REQUEST['name'] . ')' . ' ' . $_REQUEST['msg'] . '</span>';
69	}
70	$lslib->put_message($_REQUEST['write'], $_REQUEST['msg'], $_REQUEST['senderId']);
71}
72if (isset($_REQUEST['get_last_event'])) {
73	header("Content-type: text/plain");
74	echo $lslib->get_last_event($_REQUEST['get_last_event'], $_REQUEST['senderId']);
75}
76if (isset($_REQUEST['get_event'])) {
77	header("Content-type: text/plain");
78	echo $lslib->get_support_event($_REQUEST['get_event'], $_REQUEST['last'], $_REQUEST['senderId']);
79}
80// A client closes its window
81if (isset($_REQUEST['client_close'])) {
82	$lslib->user_close_request($_REQUEST['client_close']);
83}
84// An operator closes its window
85if (isset($_REQUEST['operator_close'])) {
86	$lslib->operator_close_request($_REQUEST['operator_close']);
87}
88// A client polls for a connection
89if (isset($_REQUEST['get_status'])) {
90	header("Content-type: text/plain");
91	echo $lslib->get_request_status($_REQUEST['get_status']);
92}
93// Operator console gets requests
94if (isset($_REQUEST['poll_requests'])) {
95	// Now we can format this as XML
96	header("Content-type: text/plain");
97	echo $lslib->get_last_request();
98}
99