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chat.php
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<?php
/*
* LE CHAT-PHP - a PHP Chat based on LE CHAT - Main program
*
* Copyright (C) 2015-2021 Daniel Winzen <[email protected]>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* status codes
* 0 - Kicked/Banned
* 1 - Guest
* 2 - Applicant
* 3 - Member
* 4 - System message
* 5 - Moderator
* 6 - Super-Moderator
* 7 - Admin
* 8 - Super-Admin
* 9 - Private messages
*/
// initialize and load variables/configuration
const LANGUAGES = [
'ar' => ['name' => 'العربية', 'locale' => 'ar', 'dir' => 'rtl'],
'bg' => ['name' => 'Български', 'locale' => 'bg_BG', 'dir' => 'ltr'],
'cs' => ['name' => 'čeština', 'locale' => 'cs_CZ', 'dir' => 'ltr'],
'de' => ['name' => 'Deutsch', 'locale' => 'de_DE', 'dir' => 'ltr'],
'en' => ['name' => 'English', 'locale' => 'en_GB', 'dir' => 'ltr'],
'es' => ['name' => 'Español', 'locale' => 'es_ES', 'dir' => 'ltr'],
'fi' => ['name' => 'Suomi', 'locale' => 'fi_FI', 'dir' => 'ltr'],
'fr' => ['name' => 'Français', 'locale' => 'fr_FR', 'dir' => 'ltr'],
'hi' => ['name' => 'हिन्दी', 'locale' => 'hi', 'dir' => 'ltr'],
'id' => ['name' => 'Bahasa Indonesia', 'locale' => 'id_ID', 'dir' => 'ltr'],
'it' => ['name' => 'Italiano', 'locale' => 'it_IT', 'dir' => 'ltr'],
'nl' => ['name' => 'Nederlands', 'locale' => 'nl_NL', 'dir' => 'ltr'],
'pl' => ['name' => 'Polski', 'locale' => 'pl_PL', 'dir' => 'ltr'],
'pt' => ['name' => 'Português', 'locale' => 'pt_PT', 'dir' => 'ltr'],
'ru' => ['name' => 'Русский', 'locale' => 'ru_RU', 'dir' => 'ltr'],
'tr' => ['name' => 'Türkçe', 'locale' => 'tr_TR', 'dir' => 'ltr'],
'uk' => ['name' => 'Українська', 'locale' => 'uk_UA', 'dir' => 'ltr'],
'zh-Hans' => ['name' => '简体中文', 'locale' => 'zh_CN', 'dir' => 'ltr'],
'zh-Hant' => ['name' => '正體中文', 'locale' => 'zh_TW', 'dir' => 'ltr'],
];
load_config();
$U=[];// This user data
$db = null;// Database connection
$memcached = null;// Memcached connection
$language = LANG;// user selected language
$locale = LANGUAGES[LANG]['locale'];// user selected locale
$dir = LANGUAGES[LANG]['dir'];// user selected language direction
$scripts = []; //js enhancements
$styles = []; //css styles
$session = $_REQUEST['session'] ?? ''; //requested session
// set session variable to cookie if cookies are enabled
if(!isset($_REQUEST['session']) && isset($_COOKIE[COOKIENAME])){
$session = $_COOKIE[COOKIENAME];
}
$session = preg_replace('/[^0-9a-zA-Z]/', '', $session);
load_lang();
check_db();
cron();
route();
// main program: decide what to do based on queries
function route(): void
{
global $U;
if(!isset($_REQUEST['action'])){
send_login();
}elseif($_REQUEST['action']==='view'){
check_session();
send_messages();
}elseif($_REQUEST['action']==='redirect' && !empty($_GET['url'])){
send_redirect($_GET['url']);
}elseif($_REQUEST['action']==='wait'){
parse_sessions();
send_waiting_room();
}elseif($_REQUEST['action']==='post'){
check_session();
if(isset($_POST['kick']) && isset($_POST['sendto']) && $_POST['sendto']!=='s *'){
if($U['status']>=5 || ($U['status']>=3 && (get_setting('memkickalways') || (get_count_mods()==0 && get_setting('memkick'))))){
if(isset($_POST['what']) && $_POST['what']==='purge'){
kick_chatter([$_POST['sendto']], $_POST['message'], true);
}else{
kick_chatter([$_POST['sendto']], $_POST['message'], false);
}
}
}elseif(isset($_POST['message']) && isset($_POST['sendto'])){
send_post(validate_input());
}
send_post();
}elseif($_REQUEST['action']==='login'){
check_login();
show_fails();
send_frameset();
}elseif($_REQUEST['action']==='controls'){
check_session();
send_controls();
}elseif($_REQUEST['action']==='greeting'){
check_session();
send_greeting();
}elseif($_REQUEST['action']==='delete'){
check_session();
if(!isset($_POST['what'])){
}elseif($_POST['what']==='all'){
if(isset($_POST['confirm'])){
del_all_messages('', (int) ($U['status']==1 ? $U['entry'] : 0));
}else{
send_del_confirm();
}
}elseif($_POST['what']==='last'){
del_last_message();
}
send_post();
}elseif($_REQUEST['action']==='profile'){
check_session();
$arg='';
if(!isset($_POST['do'])){
}elseif($_POST['do']==='save'){
$arg=save_profile();
}elseif($_POST['do']==='delete'){
if(isset($_POST['confirm'])){
delete_account();
}else{
send_delete_account();
}
}
send_profile($arg);
}elseif($_REQUEST['action']==='logout' && $_SERVER['REQUEST_METHOD'] === 'POST'){
kill_session();
send_logout();
}elseif($_REQUEST['action']==='colours'){
check_session();
send_colours();
}elseif($_REQUEST['action']==='notes'){
check_session();
if(!isset($_POST['do'])){
}elseif($_POST['do']==='admin' && $U['status']>6){
send_notes(0);
}elseif($_POST['do']==='staff' && $U['status']>=5){
send_notes(1);
}elseif($_POST['do']==='public' && $U['status']>=3){
send_notes(3);
}
if($U['status']<3 || (!get_setting('personalnotes') && !get_setting('publicnotes'))){
send_access_denied();
}
send_notes(2);
}elseif($_REQUEST['action']==='help'){
check_session();
send_help();
}elseif($_REQUEST['action']==='viewpublicnotes'){
check_session();
view_publicnotes();
}elseif($_REQUEST['action']==='inbox'){
check_session();
if(isset($_POST['do'])){
clean_inbox_selected();
}
send_inbox();
}elseif($_REQUEST['action']==='download'){
send_download();
}elseif($_REQUEST['action']==='admin'){
check_session();
send_admin(route_admin());
}elseif($_REQUEST['action']==='setup'){
route_setup();
}elseif($_REQUEST['action']==='sa_password_reset'){
send_sa_password_reset();
}else{
send_login();
}
}
function route_admin() : string {
global $U, $db;
if($U['status']<5){
send_access_denied();
}
if(!isset($_POST['do'])){
return '';
}elseif($_POST['do']==='clean'){
if($_POST['what']==='choose'){
send_choose_messages();
}elseif($_POST['what']==='selected'){
clean_selected((int) $U['status'], $U['nickname']);
}elseif($_POST['what']==='room'){
clean_room();
}elseif($_POST['what']==='nick'){
$stmt=$db->prepare('SELECT null FROM ' . PREFIX . 'members WHERE nickname=? AND status>=?;');
$stmt->execute([$_POST['nickname'], $U['status']]);
if(!$stmt->fetch(PDO::FETCH_ASSOC)){
del_all_messages($_POST['nickname'], 0);
}
}
}elseif($_POST['do']==='kick'){
if(isset($_POST['name'])){
if(isset($_POST['what']) && $_POST['what']==='purge'){
kick_chatter($_POST['name'], $_POST['kickmessage'], true);
}else{
kick_chatter($_POST['name'], $_POST['kickmessage'], false);
}
}
}elseif($_POST['do']==='logout'){
if(isset($_POST['name'])){
logout_chatter($_POST['name']);
}
}elseif($_POST['do']==='sessions'){
if(isset($_POST['kick']) && isset($_POST['nick'])){
kick_chatter([$_POST['nick']], '', false);
}elseif(isset($_POST['logout']) && isset($_POST['nick'])){
logout_chatter([$_POST['nick']]);
}
send_sessions();
}elseif($_POST['do']==='register'){
return register_guest(3, $_POST['name']);
}elseif($_POST['do']==='superguest'){
return register_guest(2, $_POST['name']);
}elseif($_POST['do']==='status'){
return change_status($_POST['name'], $_POST['set']);
}elseif($_POST['do']==='regnew'){
return register_new($_POST['name'], $_POST['pass']);
}elseif($_POST['do']==='approve'){
approve_session();
send_approve_waiting();
}elseif($_POST['do']==='guestaccess'){
if(isset($_POST['guestaccess']) && preg_match('/^[0123]$/', $_POST['guestaccess'])){
update_setting('guestaccess', $_POST['guestaccess']);
change_guest_access(intval($_POST['guestaccess']));
}
}elseif($_POST['do']==='filter'){
send_filter(manage_filter());
}elseif($_POST['do']==='linkfilter'){
send_linkfilter(manage_linkfilter());
}elseif($_POST['do']==='topic'){
if(isset($_POST['topic'])){
update_setting('topic', htmlspecialchars($_POST['topic']));
}
}elseif($_POST['do']==='passreset'){
return passreset($_POST['name'], $_POST['pass']);
}
return '';
}
function route_setup(): void
{
global $U;
if(!valid_admin()){
send_alogin();
}
$C['bool_settings']=[
'suguests' => _('Enable applicants'),
'imgembed' => _('Embed images'),
'timestamps' => _('Show Timestamps'),
'trackip' => _('Show session-IP'),
'memkick' => _('Members can kick, if no moderator is present'),
'memkickalways' => _('Members can always kick'),
'forceredirect' => _('Force redirection'),
'incognito' => _('Incognito mode'),
'sendmail' => _('Send mail on new public message'),
'modfallback' => _('Fallback to waiting room, if no moderator is present to approve guests'),
'disablepm' => _('Disable private messages'),
'eninbox' => _('Enable offline inbox'),
'enablegreeting' => _('Show a greeting message before showing the messages'),
'sortupdown' => _('Sort messages from top to bottom'),
'hidechatters' => _('Hide list of chatters'),
'personalnotes' => _('Personal notes'),
'publicnotes' => _('Public notes'),
'filtermodkick' => _('Apply kick filter on moderators'),
'namedoers' => _('Show who kicks people or purges all messages.'),
'hide_reload_post_box' => _('Hide reload post box button'),
'hide_reload_messages' => _('Hide reload messages button'),
'hide_profile' => _('Hide profile button'),
'hide_admin' => _('Hide admin button'),
'hide_notes' => _('Hide notes button'),
'hide_clone' => _('Hide clone button'),
'hide_rearrange' => _('Hide rearrange button'),
'hide_help' => _('Hide help button'),
'postbox_delete_globally' => _('Apply postbox delete button globally'),
'allow_js' => _('Allow enhancing functionality with JavaScript'),
];
$C['colour_settings']=[
'colbg' => _('Background colour'),
'coltxt' => _('Font colour'),
];
$C['msg_settings']=[
'msgenter' => _('Entrance'),
'msgexit' => _('Leaving'),
'msgmemreg' => _('Member registered'),
'msgsureg' => _('Applicant registered'),
'msgkick' => _('Kicked'),
'msgmultikick' => _('Multiple kicked'),
'msgallkick' => _('All kicked'),
'msgclean' => _('Room cleaned'),
'msgsendall' => _('Message to all'),
'msgsendmem' => _('Message to members only'),
'msgsendmod' => _('Message to staff only'),
'msgsendadm' => _('Message to admins only'),
'msgsendprv' => _('Private message'),
'msgattache' => _('Attachement'),
];
$C['number_settings']=[
'memberexpire' => _('Member timeout (minutes)'),
'guestexpire' => _('Guest timeout (minutes)'),
'kickpenalty' => _('Kick penalty (minutes)'),
'entrywait' => _('Waiting room time (seconds)'),
'captchatime' => _('Captcha timeout (seconds)'),
'messageexpire' => _('Message timeout (minutes)'),
'messagelimit' => _('Message limit (public)'),
'maxmessage' => _('Maximal message length'),
'maxname' => _('Maximal nickname length'),
'minpass' => _('Minimal password length'),
'defaultrefresh' => _('Default message reload time (seconds)'),
'numnotes' => _('Number of notes revisions to keep'),
'maxuploadsize' => _('Maximum upload size in KB'),
'enfileupload' => _('Enable file uploads'),
'max_refresh_rate' => _('Lowest refresh rate'),
'min_refresh_rate' => _('Highest refresh rate'),
];
$C['textarea_settings']=[
'rulestxt' => _('Rules (html)'),
'css' => _('CSS Style'),
'disabletext' => _('Chat disabled message (html)'),
];
$C['text_settings']=[
'dateformat' => _('<a target="_blank" href="https://php.net/manual/en/function.date.php#refsect1-function.date-parameters" rel="noopener noreferrer">Date formating</a>'),
'captchachars' => _('Characters used in Captcha'),
'redirect' => _('Custom redirection script'),
'chatname' => _('Chat name'),
'mailsender' => _('Send mail using this address'),
'mailreceiver' => _('Send mail to this address'),
'nickregex' => _('Nickname regex'),
'passregex' => _('Password regex'),
'externalcss' => _('Link to external CSS file (on your own server)'),
'metadescription' => _('Meta description (best 50 - 160 characters for SEO)'),
'sysmessagetxt' => _('Prepend this text to system messages'),
];
$extra_settings=[
'guestaccess' => _('Change Guestaccess'),
'englobalpass' => _('Enable global Password'),
'globalpass' => _('Global Password:'),
'captcha' => _('Captcha'),
'dismemcaptcha' => _('Only for guests'),
'topic' => _('Topic'),
'guestreg' => _('Let guests register themselves'),
'defaulttz' => _('Default time zone'),
];
$C['settings']=array_keys(array_merge($extra_settings, $C['bool_settings'], $C['colour_settings'], $C['msg_settings'], $C['number_settings'], $C['textarea_settings'], $C['text_settings'])); // All settings in the database
if(!isset($_POST['do'])){
}elseif($_POST['do']==='save'){
save_setup($C);
}elseif($_POST['do']==='backup' && $U['status']==8){
send_backup($C);
}elseif($_POST['do']==='restore' && $U['status']==8){
restore_backup($C);
send_backup($C);
}elseif($_POST['do']==='destroy' && $U['status']==8){
if(isset($_POST['confirm'])){
destroy_chat($C);
}else{
send_destroy_chat();
}
}
send_setup($C);
}
// html output subs
function prepare_stylesheets(string $class): void
{
global $U, $db, $scripts, $styles;
if($class === 'fatal_error') {
$styles[ 'fatal_error' ] = 'body{background-color:#000000;color:#FF0033}';
}
$styles['default'] = 'body,iframe{background-color:#000000;color:#FFFFFF;font-size:14px;text-align:center;width:100%;height:100%;margin:0;padding:0;border:none}';
$styles['default'] .= 'a:visited{color:#B33CB4} a:link{color:#00A2D4} a:active{color:#55A2D4}';
$styles['default'] .= 'input,select,textarea{color:#FFFFFF;background-color:#000000} ';
$styles['default'] .= '.error{color:#FF0033;text-align:left} .delbutton{background-color:#660000} .backbutton{background-color:#004400} #exitbutton{background-color:#AA0000} ';
$styles['default'] .= '.setup table table,.admin table table,.profile table table{width:100%;text-align:left} ';
$styles['default'] .= '.alogin table,.init table,.destroy_chat table,.delete_account table,.sessions table,.filter table,.linkfilter table,.notes table,.approve_waiting table,.del_confirm table,.profile table,.admin table,.backup table,.setup table{margin-left:auto;margin-right:auto} ';
$styles['default'] .= '.setup table table table,.admin table table table,.profile table table table{border-spacing:0px;margin-left:auto;margin-right:unset;width:unset} ';
$styles['default'] .= '.setup table table td,.backup #restoresubmit,.backup #backupsubmit,.admin table table td,.profile table table td,.login td+td,.alogin td+td{text-align:right} ';
$styles['default'] .= '.init td,.backup #restorecheck td,.admin #clean td,.admin #regnew td,.session td,.messages,.inbox,.approve_waiting td,.choose_messages,.greeting,.help,.login td,.alogin td{text-align:left} ';
$styles['default'] .= '.approve_waiting #action td:only-child,.help #backcredit,.login td:only-child,.alogin td:only-child,.init td:only-child{text-align:center} .sessions td,.sessions th,.approve_waiting td,.approve_waiting th{padding: 5px} ';
$styles['default'] .= '.sessions td td{padding: 1px} .notes textarea{height:80vh;width:80%} ';
$styles['default'] .= '.post table,.controls table,.login table{border-spacing:0px;margin-left:auto;margin-right:auto} .login table{border:2px solid} .controls{overflow-y:none} ';
if($class === 'init' || ! $db instanceof PDO){
return;
}
if($class === 'frameset'){
if(($U['status']>=5 || ($U['status']>2 && get_count_mods()==0)) && get_setting('enfileupload')>0 && get_setting('enfileupload')<=$U['status']){
$postheight='120px';
}else{
$postheight='100px';
}
if((!isset($_REQUEST['sort']) && !$U['sortupdown']) || (isset($_REQUEST['sort']) && $_REQUEST['sort']==0)) {
$styles[ 'frameset' ] = "#frameset-mid{position:fixed;top:$postheight;bottom:45px;left:0;right:0;margin:0;padding:0;overflow:hidden}";
$styles[ 'frameset' ] .= "#frameset-top{position:fixed;top:0;left:0;right:0;height:$postheight;margin:0;padding:0;overflow:hidden;border-bottom: 1px solid}";
$styles[ 'frameset' ] .= "#frameset-bot{position:fixed;bottom:0;left:0;right:0;height:45px;margin:0;padding:0;overflow:hidden;border-top:1px solid}";
} else{
$styles[ 'frameset' ] =" #frameset-mid{position:fixed;top:45px;bottom:$postheight;left:0;right:0;margin:0;padding:0;overflow:hidden}";
$styles[ 'frameset' ] .= "#frameset-top{position:fixed;top:0;left:0;right:0;height:45px;margin:0;padding:0;overflow:hidden;border-bottom:1px solid}";
$styles[ 'frameset' ] .= "#frameset-bot{position:fixed;bottom:0;left:0;right:0;height:$postheight;margin:0;padding:0;overflow:hidden;border-top:1px solid}";
}
}
if($class === 'filter'){
$styles['filter'] = 'table table{width:100%} ';
$styles['filter'] .= 'table table td:nth-child(1){width:8em;font-weight:bold} ';
$styles['filter'] .= 'table table td:nth-child(2),table table td:nth-child(3){width:12em} ';
$styles['filter'] .= 'table table td:nth-child(4){width:9em} ';
$styles['filter'] .= 'table table td:nth-child(5),table table td:nth-child(6),table table td:nth-child(7),table table td:nth-child(8){width:5em} ';
}
if($class === 'linkfilter'){
$styles['linkfilter'] = 'table table{width:100%} ';
$styles['linkfilter'] .= 'table table td:nth-child(1){width:8em;font-weight:bold} ';
$styles['linkfilter'] .= 'table table td:nth-child(2),table table td:nth-child(3){width:12em} ';
$styles['linkfilter'] .= 'table table td:nth-child(4),table table td:nth-child(5){width:5em} ';
}
if($class === 'post'){
$styles['post'] = '.spacer{width:10px} #firstline{vertical-align:top}';
}
if($class === 'messages'){
$styles['messages'] = '.nicklink{text-decoration:none}.channellink{text-decoration:underline}';
$styles['messages'] .= '#chatters{max-height:100px;overflow-y:auto} #chatters, #chatters table{border-spacing:0px} ';
$styles['messages'] .= '#manualrefresh{display:block;position:fixed;text-align:center;left:25%;width:50%;top:-200%;animation:timeout_messages ';
$styles['messages'] .= $U['refresh']+20;
$styles['messages'] .= 's forwards;z-index:2;background-color:#500000;border:2px solid #ff0000} ';
$styles['messages'] .= '@keyframes timeout_messages{0%{top:-200%} 99%{top:-200%} 100%{top:0%}} ';
$styles['messages'] .= '.msg{max-height:180px;overflow-y:auto} #bottom_link{position:fixed;top:0.5em;right:0.5em} #top_link{position:fixed;bottom:0.5em;right:0.5em} ';
$styles['messages'] .= '#chatters th,#chatters td{vertical-align:top} a img{width:15%} a:hover img{width:35%}';
$styles['messages'] .= '#messages{word-wrap:break-word}';
}
$css=get_setting('css');
$coltxt=get_setting('coltxt');
if(!empty($U['bgcolour'])){
$colbg=$U['bgcolour'];
}else{
$colbg=get_setting('colbg');
}
$styles['custom'] = preg_replace("/(\r?\n|\r\n?)/u", '', "body,iframe{background-color:#$colbg;color:#$coltxt} $css");
$allow_js = (bool) get_setting('allow_js');
if($allow_js){
$scripts['default'] = 'if(window.history.replaceState){window.history.replaceState(null,"");}';
if($class === 'frameset') {
$scripts[ 'frameset' ] = 'window.addEventListener("message", (e)=>{
if(e.data === "post_box_loaded"){
let autofocus = document.querySelector("iframe[name=post").contentDocument.querySelector("input[autofocus]");
if(autofocus){
autofocus.focus();
}
}
});';
}
if($class === 'post') {
$scripts[ 'post' ] = 'window.addEventListener("load", _=>{
window.top.postMessage("post_box_loaded", window.location.origin);
})';
}
}
}
function print_stylesheet(string $class): void
{
global $scripts, $styles;
//default css
echo "<style>$styles[default]</style>";
if ( $class === 'init' ) {
return;
}
if(isset($styles[$class])) {
echo "<style>$styles[$class]</style>";
}
//overwrite with custom css
echo "<style>$styles[custom]</style>";
$allow_js = (bool) get_setting( 'allow_js' );
if ( $allow_js ) {
echo "<script>$scripts[default]</script>";
if(isset($scripts[$class])) {
echo "<script>$scripts[$class]</script>";
}
}
}
function print_end(): void
{
echo '</body></html>';
exit;
}
function credit() : string {
return '<small><br><br><a target="_blank" href="https://github.com/DanWin/le-chat-php" rel="noreferrer noopener">LE CHAT-PHP - ' . VERSION . '</a></small>';
}
function meta_html() : string {
global $U, $db;
$colbg = '000000';
$description = '';
if(!empty($U['bgcolour'])){
$colbg = $U['bgcolour'];
}else{
if($db instanceof PDO){
$colbg = get_setting('colbg');
$description = '<meta name="description" content="'.htmlspecialchars(get_setting('metadescription')).'">';
}
}
return '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta name="referrer" content="no-referrer"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=yes"><meta name="theme-color" content="#'.$colbg.'"><meta name="msapplication-TileColor" content="#'.$colbg.'">' . $description;
}
function form(string $action, string $do='') : string {
global $language, $session;
$form="<form action=\"$_SERVER[SCRIPT_NAME]\" enctype=\"multipart/form-data\" method=\"post\">".hidden('lang', $language).hidden('nc', substr(time(), -6)).hidden('action', $action);
if(!empty($session)){
$form.=hidden('session', $session);
}
if($do!==''){
$form.=hidden('do', $do);
}
return $form;
}
function form_target(string $target, string $action, string $do='') : string {
global $language, $session;
$form="<form action=\"$_SERVER[SCRIPT_NAME]\" enctype=\"multipart/form-data\" method=\"post\" target=\"$target\">".hidden('lang', $language).hidden('nc', substr(time(), -6)).hidden('action', $action);
if(!empty($session)){
$form.=hidden('session', $session);
}
if($do!==''){
$form.=hidden('do', $do);
}
return $form;
}
function hidden(string $name='', string $value='') : string {
return "<input type=\"hidden\" name=\"$name\" value=\"$value\">";
}
function submit(string $value='', string $extra_attribute='') : string {
return "<input type=\"submit\" value=\"$value\" $extra_attribute>";
}
function thr(): void
{
echo '<tr><td><hr></td></tr>';
}
function print_start(string $class='', int $ref=0, string $url=''): void
{
global $language, $dir;
prepare_stylesheets($class);
send_headers();
if(!empty($url)){
$url=str_replace('&', '&', $url);// Don't escape "&" in URLs here, it breaks some (older) browsers and js refresh!
header("Refresh: $ref; URL=$url");
}
echo '<!DOCTYPE html><html lang="'.$language.'" dir="'.$dir.'"><head>'.meta_html();
if(!empty($url)){
echo "<meta http-equiv=\"Refresh\" content=\"$ref; URL=$url\">";
}
if($class==='init'){
echo '<title>'._('Initial Setup').'</title>';
}else{
echo '<title>'.get_setting('chatname').'</title>';
}
print_stylesheet($class);
echo "</head><body class=\"$class\">";
if($class!=='init' && ($externalcss=get_setting('externalcss'))!=''){
//external css - in body to make it non-renderblocking
echo "<link rel=\"stylesheet\" type=\"text/css\" href=\"$externalcss\">";
}
}
function send_redirect(string $url): void
{
$url=trim(htmlspecialchars_decode(rawurldecode($url)));
preg_match('~^(.*)://~u', $url, $match);
$url=preg_replace('~^(.*)://~u', '', $url);
$escaped=htmlspecialchars($url);
if(isset($match[1]) && ($match[1]==='http' || $match[1]==='https')){
print_start('redirect', 0, $match[0].$escaped);
echo '<p>'.sprintf(_('Redirecting to: %s'), "<a href=\"$match[0]$escaped\">$match[0]$escaped</a>").'</p>';
}else{
print_start('redirect');
if(!isset($match[0])){
$match[0]='';
}
if(preg_match('~^(javascript|blob|data):~', $url)){
echo '<p>'.sprintf(_('Dangerous non-http link requested, copy paste this link if you are really sure: %s'), "$match[0]$escaped").'</p>';
} else {
echo '<p>'.sprintf(_('Non-http link requested: %s'), "<a href=\"$match[0]$escaped\">$match[0]$escaped</a>").'</p>';
}
echo '<p>'.sprintf(_("If it's not working, try this one: %s"), "<a href=\"http://$escaped\">http://$escaped</a>").'</p>';
}
print_end();
}
function send_access_denied(): void
{
global $U;
http_response_code(403);
print_start('access_denied');
echo '<h1>'._('Access denied').'</h1>'.sprintf(_("You are logged in as %s and don't have access to this section."), style_this(htmlspecialchars($U['nickname']), $U['style'])).'<br>';
echo form('logout');
echo submit(_('Logout'), 'id="exitbutton"')."</form>";
print_end();
}
function send_captcha(): void
{
global $db, $memcached;
$difficulty=(int) get_setting('captcha');
if($difficulty===0 || !extension_loaded('gd')){
return;
}
$captchachars=get_setting('captchachars');
$length=strlen($captchachars)-1;
$code='';
for($i=0;$i<5;++$i){
$code.=$captchachars[mt_rand(0, $length)];
}
$randid=mt_rand();
$time=time();
if(MEMCACHED){
$memcached->set(DBNAME . '-' . PREFIX . "captcha-$randid", $code, get_setting('captchatime'));
}else{
$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'captcha (id, time, code) VALUES (?, ?, ?);');
$stmt->execute([$randid, $time, $code]);
}
echo '<tr id="captcha"><td>'._('Copy:').'<br>';
if($difficulty===1){
$im=imagecreatetruecolor(55, 24);
$bg=imagecolorallocate($im, 0, 0, 0);
$fg=imagecolorallocate($im, 255, 255, 255);
imagefill($im, 0, 0, $bg);
imagestring($im, 5, 5, 5, $code, $fg);
echo '<img alt="" width="55" height="24" src="data:image/gif;base64,';
}elseif($difficulty===2){
$im=imagecreatetruecolor(55, 24);
$bg=imagecolorallocate($im, 0, 0, 0);
$fg=imagecolorallocate($im, 255, 255, 255);
imagefill($im, 0, 0, $bg);
imagestring($im, 5, 5, 5, $code, $fg);
$line=imagecolorallocate($im, 255, 255, 255);
for($i=0;$i<2;++$i){
imageline($im, 0, mt_rand(0, 24), 55, mt_rand(0, 24), $line);
}
$dots=imagecolorallocate($im, 255, 255, 255);
for($i=0;$i<100;++$i){
imagesetpixel($im, mt_rand(0, 55), mt_rand(0, 24), $dots);
}
echo '<img alt="" width="55" height="24" src="data:image/gif;base64,';
}else{
$im=imagecreatetruecolor(150, 200);
$bg=imagecolorallocate($im, 0, 0, 0);
$fg=imagecolorallocate($im, 255, 255, 255);
imagefill($im, 0, 0, $bg);
$chars=[];
$x = $y = 0;
for($i=0;$i<10;++$i){
$found=false;
while(!$found){
$x=mt_rand(10, 140);
$y=mt_rand(10, 180);
$found=true;
foreach($chars as $char){
if($char['x']>=$x && ($char['x']-$x)<25){
$found=false;
}elseif($char['x']<$x && ($x-$char['x'])<25){
$found=false;
}
if(!$found){
if($char['y']>=$y && ($char['y']-$y)<25){
break;
}elseif($char['y']<$y && ($y-$char['y'])<25){
break;
}else{
$found=true;
}
}
}
}
$chars[]=['x', 'y'];
$chars[$i]['x']=$x;
$chars[$i]['y']=$y;
if($i<5){
imagechar($im, 5, $chars[$i]['x'], $chars[$i]['y'], $captchachars[mt_rand(0, $length)], $fg);
}else{
imagechar($im, 5, $chars[$i]['x'], $chars[$i]['y'], $code[$i-5], $fg);
}
}
$follow=imagecolorallocate($im, 200, 0, 0);
imagearc($im, $chars[5]['x']+4, $chars[5]['y']+8, 16, 16, 0, 360, $follow);
for($i=5;$i<9;++$i){
imageline($im, $chars[$i]['x']+4, $chars[$i]['y']+8, $chars[$i+1]['x']+4, $chars[$i+1]['y']+8, $follow);
}
$line=imagecolorallocate($im, 255, 255, 255);
for($i=0;$i<5;++$i){
imageline($im, 0, mt_rand(0, 200), 150, mt_rand(0, 200), $line);
}
$dots=imagecolorallocate($im, 255, 255, 255);
for($i=0;$i<1000;++$i){
imagesetpixel($im, mt_rand(0, 150), mt_rand(0, 200), $dots);
}
echo '<img alt="" width="150" height="200" src="data:image/gif;base64,';
}
ob_start();
imagegif($im);
imagedestroy($im);
echo base64_encode(ob_get_clean()).'">';
echo '</td><td>'.hidden('challenge', $randid).'<input type="text" name="captcha" size="15" autocomplete="off" required></td></tr>';
}
function send_setup(array $C): void
{
global $U;
print_start('setup');
echo '<h2>'._('Chat Setup').'</h2>'.form('setup', 'save');
echo '<table id="guestaccess">';
thr();
$ga=(int) get_setting('guestaccess');
echo '<tr><td><table><tr><th>'._('Change Guestaccess').'</th><td>';
echo '<select name="guestaccess">';
echo '<option value="1"';
if($ga===1){
echo ' selected';
}
echo '>'._('Allow').'</option>';
echo '<option value="2"';
if($ga===2){
echo ' selected';
}
echo '>'._('Allow with waitingroom').'</option>';
echo '<option value="3"';
if($ga===3){
echo ' selected';
}
echo '>'._('Require moderator approval').'</option>';
echo '<option value="0"';
if($ga===0){
echo ' selected';
}
echo '>'._('Only members').'</option>';
echo '<option value="4"';
if($ga===4){
echo ' selected';
}
echo '>'._('Disable chat').'</option>';
echo '</select></td></tr></table></td></tr>';
thr();
$englobal=(int) get_setting('englobalpass');
echo '<tr><td><table id="globalpass"><tr><th>'._('Global Password:').'</th><td>';
echo '<table>';
echo '<tr><td><select name="englobalpass">';
echo '<option value="0"';
if($englobal===0){
echo ' selected';
}
echo '>'._('Disabled').'</option>';
echo '<option value="1"';
if($englobal===1){
echo ' selected';
}
echo '>'._('Enabled').'</option>';
echo '<option value="2"';
if($englobal===2){
echo ' selected';
}
echo '>'._('Only for guests').'</option>';
echo '</select></td><td> </td>';
echo '<td><input type="text" name="globalpass" value="'.htmlspecialchars(get_setting('globalpass')).'"></td></tr>';
echo '</table></td></tr></table></td></tr>';
thr();
$ga=(int) get_setting('guestreg');
echo '<tr><td><table id="guestreg"><tr><th>'._('Let guests register themselves').'</th><td>';
echo '<select name="guestreg">';
echo '<option value="0"';
if($ga===0){
echo ' selected';
}
echo '>'._('Disabled').'</option>';
echo '<option value="1"';
if($ga===1){
echo ' selected';
}
echo '>'._('As applicant').'</option>';
echo '<option value="2"';
if($ga===2){
echo ' selected';
}
echo '>'._('As member').'</option>';
echo '</select></td></tr></table></td></tr>';
thr();
echo '<tr><td><table id="sysmessages"><tr><th>'._('System messages').'</th><td>';
echo '<table>';
foreach($C['msg_settings'] as $setting => $title){
echo "<tr><td> $title</td><td> <input type=\"text\" name=\"$setting\" value=\"".get_setting($setting).'"></td></tr>';
}
echo '</table></td></tr></table></td></tr>';
foreach($C['text_settings'] as $setting => $title){
thr();
echo "<tr><td><table id=\"$setting\"><tr><th>".$title.'</th><td>';
echo "<input type=\"text\" name=\"$setting\" value=\"".htmlspecialchars(get_setting($setting)).'">';
echo '</td></tr></table></td></tr>';
}
foreach($C['colour_settings'] as $setting => $title){
thr();
echo "<tr><td><table id=\"$setting\"><tr><th>".$title.'</th><td>';
echo "<input type=\"color\" name=\"$setting\" value=\"#".htmlspecialchars(get_setting($setting)).'">';
echo '</td></tr></table></td></tr>';
}
thr();
echo '<tr><td><table id="captcha"><tr><th>'._('Captcha').'</th><td>';
echo '<table>';
if(!extension_loaded('gd')){
echo '<tr><td>'.sprintf(_('The %s extension of PHP is required for this feature. Please install it first.'), 'gd').'</td></tr>';
}else{
echo '<tr><td><select name="dismemcaptcha">';
$dismemcaptcha=(bool) get_setting('dismemcaptcha');
echo '<option value="0"';
if(!$dismemcaptcha){
echo ' selected';
}
echo '>'._('Enabled').'</option>';
echo '<option value="1"';
if($dismemcaptcha){
echo ' selected';
}
echo '>'._('Only for guests').'</option>';
echo '</select></td><td><select name="captcha">';
$captcha=(int) get_setting('captcha');
echo '<option value="0"';
if($captcha===0){
echo ' selected';
}
echo '>'._('Disabled').'</option>';
echo '<option value="1"';
if($captcha===1){
echo ' selected';
}
echo '>'._('Simple').'</option>';
echo '<option value="2"';
if($captcha===2){
echo ' selected';
}
echo '>'._('Moderate').'</option>';
echo '<option value="3"';
if($captcha===3){
echo ' selected';
}
echo '>'._('Extreme').'</option>';
echo '</select></td></tr>';
}
echo '</table></td></tr></table></td></tr>';
thr();
echo '<tr><td><table id="defaulttz"><tr><th>'._('Default time zone').'</th><td>';
echo '<select name="defaulttz">';
$tzs=timezone_identifiers_list();
$defaulttz=get_setting('defaulttz');
foreach($tzs as $tz){
echo "<option value=\"$tz\"";
if($defaulttz==$tz){
echo ' selected';
}
echo ">$tz</option>";
}
echo '</select>';
echo '</td></tr></table></td></tr>';
foreach($C['textarea_settings'] as $setting => $title){
thr();
echo "<tr><td><table id=\"$setting\"><tr><th>".$title.'</th><td>';
echo "<textarea name=\"$setting\" rows=\"4\" cols=\"60\">".htmlspecialchars(get_setting($setting)).'</textarea>';
echo '</td></tr></table></td></tr>';
}
foreach($C['number_settings'] as $setting => $title){
thr();
echo "<tr><td><table id=\"$setting\"><tr><th>".$title.'</th><td>';
echo "<input type=\"number\" name=\"$setting\" value=\"".htmlspecialchars(get_setting($setting)).'">';
echo '</td></tr></table></td></tr>';
}
foreach($C['bool_settings'] as $setting => $title){
thr();
echo "<tr><td><table id=\"$setting\"><tr><th>".$title.'</th><td>';
echo "<select name=\"$setting\">";
$value=(bool) get_setting($setting);
echo '<option value="0"';
if(!$value){
echo ' selected';
}
echo '>'._('Disabled').'</option>';
echo '<option value="1"';
if($value){
echo ' selected';
}
echo '>'._('Enabled').'</option>';
echo '</select></td></tr>';
echo '</table></td></tr>';
}
thr();
echo '<tr><td>'.submit(_('Apply')).'</td></tr></table></form><br>';
if($U['status']==8){
echo '<table id="actions"><tr><td>';
echo form('setup', 'backup');
echo submit(_('Backup and restore')).'</form></td><td>';
echo form('setup', 'destroy');
echo submit(_('Destroy chat'), 'class="delbutton"').'</form></td></tr></table><br>';
}
echo form_target('_parent', 'logout');
echo submit(_('Logout'), 'id="exitbutton"').'</form>'.credit();
print_end();
}
function restore_backup(array $C): void
{
global $db, $memcached;
if(!extension_loaded('json')){
return;
}
$code=json_decode($_POST['restore'], true);
if(isset($_POST['settings'])){
foreach($C['settings'] as $setting){
if(isset($code['settings'][$setting])){
update_setting($setting, $code['settings'][$setting]);
}
}
}
if(isset($_POST['filter']) && (isset($code['filters']) || isset($code['linkfilters']))){
$db->exec('DELETE FROM ' . PREFIX . 'filter;');
$db->exec('DELETE FROM ' . PREFIX . 'linkfilter;');
$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'filter (filtermatch, filterreplace, allowinpm, regex, kick, cs) VALUES (?, ?, ?, ?, ?, ?);');
foreach($code['filters'] as $filter){
if(!isset($filter['cs'])){
$filter['cs']=0;
}
$stmt->execute([$filter['match'], $filter['replace'], $filter['allowinpm'], $filter['regex'], $filter['kick'], $filter['cs']]);
}
$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'linkfilter (filtermatch, filterreplace, regex) VALUES (?, ?, ?);');
foreach($code['linkfilters'] as $filter){
$stmt->execute([$filter['match'], $filter['replace'], $filter['regex']]);
}
if(MEMCACHED){
$memcached->delete(DBNAME . '-' . PREFIX . 'filter');
$memcached->delete(DBNAME . '-' . PREFIX . 'linkfilter');
}
}
if(isset($_POST['members']) && isset($code['members'])){
$db->exec('DELETE FROM ' . PREFIX . 'inbox;');
$db->exec('DELETE FROM ' . PREFIX . 'members;');
$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'members (nickname, passhash, status, refresh, bgcolour, regedby, lastlogin, loginfails, timestamps, embed, incognito, style, nocache, tz, eninbox, sortupdown, hidechatters, nocache_old) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);');
foreach($code['members'] as $member){
$new_settings=['nocache', 'tz', 'eninbox', 'sortupdown', 'hidechatters', 'nocache_old'];
foreach($new_settings as $setting){
if(!isset($member[$setting])){
$member[$setting]=0;
}
}
$stmt->execute([$member['nickname'], $member['passhash'], $member['status'], $member['refresh'], $member['bgcolour'], $member['regedby'], $member['lastlogin'], $member['loginfails'], $member['timestamps'], $member['embed'], $member['incognito'], $member['style'], $member['nocache'], $member['tz'], $member['eninbox'], $member['sortupdown'], $member['hidechatters'], $member['nocache_old']]);
}
}
if(isset($_POST['notes']) && isset($code['notes'])){
$db->exec('DELETE FROM ' . PREFIX . 'notes;');
$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'notes (type, lastedited, editedby, text) VALUES (?, ?, ?, ?);');
foreach($code['notes'] as $note){
if($note['type']==='admin'){
$note['type']=0;
}elseif($note['type']==='staff'){
$note['type']=1;
}elseif($note['type']==='public'){
$note['type']=3;
}
if(MSGENCRYPTED){
try {
$note['text']=base64_encode(sodium_crypto_aead_aes256gcm_encrypt($note['text'], '', AES_IV, ENCRYPTKEY));
} catch (SodiumException $e){
send_error($e->getMessage());
}
}
$stmt->execute([$note['type'], $note['lastedited'], $note['editedby'], $note['text']]);
}
}
}
function send_backup(array $C): void
{
global $db;
$code=[];
if($_POST['do']==='backup'){
if(isset($_POST['settings'])){
foreach($C['settings'] as $setting){
$code['settings'][$setting]=get_setting($setting);