public static function filter($text, $replacementText = null)
{
if (self::$words === null) {
self::$words = file(dirname(__FILE__) . self::BAD_WORDS_FILE, FILE_IGNORE_NEW_LINES);
}
if (extension_loaded('mbstring')) {
mb_internal_encoding("UTF-8");
foreach (self::$words as $word) {
$notFuzzyMatching = true;
$word = trim($word);
// detect empty lines and comments:
if (self::isCommentOrEmpty($word)) {
continue;
}
// fuzzy matching:
if (self::isFuzzyMatchingMb($word)) {
$notFuzzyMatching = false;
$word = trim($word, '[]');
}
// masked word:
$masked = self::getMaskedWordMb($word, $replacementText);
// compose regexp for the word:
$regexp = mb_substr($word, 0, 1);
for ($i = 1; $i < mb_strlen($word); $i++) {
$regexp .= "[^\\p{L}]*";
$regexp .= preg_quote(mb_substr($word, $i, 1));
}
// if not fuzzy matching:
if ($notFuzzyMatching) {
$regexp = "(^|[^\\p{L}])" . $regexp . "([^\\p{L}]|\$)";
$masked = '$1' . $masked . '$2';
}
$text = preg_replace("/{$regexp}/ui", $masked, $text);
}
} else {
foreach (self::$words as $word) {
$notFuzzyMatching = true;
$word = trim($word);
// detect empty lines and comments:
if (self::isCommentOrEmpty($word)) {
continue;
}
// fuzzy matching:
if (self::isFuzzyMatching($word)) {
$notFuzzyMatching = false;
$word = trim($word, '[]');
}
// masked word:
$masked = $replacementText !== null ? $replacementText : self::getMaskedWord($word);
// compose regexp for the word:
$regexp = substr($word, 0, 1);
for ($i = 1; $i < strlen($word); $i++) {
$regexp .= "[^\\p{L}]*";
$regexp .= preg_quote(substr($word, $i, 1));
}
// if not fuzzy matching:
if ($notFuzzyMatching) {
$regexp = "(^|[^\\p{L}])" . $regexp . "([^\\p{L}]|\$)";
$masked = '$1' . $masked . '$2';
}
$text = preg_replace("/{$regexp}/i", $masked, $text);
}
}
return $text;
}
/**
* Validates given username.
*
* @param string $userName
*
* @return string Validated username (trimmed and filtered)
* @throws Exception If username is not valid
*/
public function validateUserName($userName)
{
$userName = trim($userName);
// check for valid characters:
if (strlen($userName) == 0 || !preg_match('/^[a-zA-Z0-9\\-_ ]+$/', $userName)) {
throw new Exception($this->options->getOption('message_error_1', 'Only letters, number, spaces, hyphens and underscores are allowed'));
}
// filter the new username:
if ($this->options->isOptionEnabled('filter_bad_words')) {
WiseChatContainer::load('rendering/filters/pre/WiseChatFilter');
$userName = WiseChatFilter::filter($userName);
}
// check if the new username is already occupied:
$occupiedException = new Exception($this->options->getOption('message_error_2', 'This name is already occupied'));
$prefix = $this->options->getOption('user_name_prefix', 'Anonymous');
if ($this->getUserNameOrEmptyString() == $userName || $this->usersDAO->getWpUserByDisplayName($userName) !== null || $this->usersDAO->getWpUserByLogin($userName) !== null || $this->channelUsersDAO->isUserNameOccupied($userName, $this->userSessionDAO->getSessionId()) || preg_match("/^{$prefix}/", $userName) || $userName == $this->getSystemUser()->getName()) {
throw $occupiedException;
}
return $userName;
}
/**
* @dataProvider dataFuzzyNegativeUnicode
*/
public function testFuzzyNegativeUnicode($input, $output)
{
WiseChatFilter::$words = array('[balls]', '[kość]');
if (extension_loaded(self::$mbExtension)) {
$this->assertEquals($output, WiseChatFilter::filter($input));
}
}
/**
* Publishes a message in the given channel of the chat and returns it.
*
* @param WiseChatUser $user Author of the message
* @param WiseChatChannel $channel A channel to publish in
* @param string $text Content of the message
* @param boolean $isAdmin Indicates whether to mark the message as admin-owned
*
* @return WiseChatMessage|null
* @throws Exception On validation error
*/
public function addMessage($user, $channel, $text, $isAdmin = false)
{
$text = trim($text);
$filteredMessage = $text;
// basic validation:
if ($user === null) {
throw new Exception('User cannot be null');
}
if ($channel === null) {
throw new Exception('Channel cannot be null');
}
if ($this->bansService->isIpAddressBanned($user->getIp())) {
throw new Exception($this->options->getOption('message_error_3', 'You were banned from posting messages'));
}
// use bad words filtering:
if ($this->options->isOptionEnabled('filter_bad_words')) {
WiseChatContainer::load('rendering/filters/pre/WiseChatFilter');
$badWordsFilterReplacement = $this->options->getOption('bad_words_replacement_text');
$filteredMessage = WiseChatFilter::filter($filteredMessage, strlen($badWordsFilterReplacement) > 0 ? $badWordsFilterReplacement : null);
}
// auto-ban feature:
if ($this->options->isOptionEnabled('enable_autoban') && $filteredMessage != $text) {
$counter = $this->abuses->incrementAndGetAbusesCounter();
$threshold = $this->options->getIntegerOption('autoban_threshold', 3);
if ($counter >= $threshold && $threshold > 0) {
$duration = $this->options->getIntegerOption('autoban_duration', 1440);
$this->bansService->banIpAddress($user->getIp(), $this->bansService->getDurationFromString($duration . 'm'));
$this->abuses->clearAbusesCounter();
}
}
// flood prevention feature:
if ($this->options->isOptionEnabled('enable_flood_control')) {
$floodControlThreshold = $this->options->getIntegerOption('flood_control_threshold', 200);
$floodControlTimeFrame = $this->options->getIntegerOption('flood_control_time_frame', 1);
if ($floodControlThreshold > 0 && $floodControlTimeFrame > 0) {
$messagesAmount = $this->messagesDAO->getNumberByCriteria(WiseChatMessagesCriteria::build()->setIp($user->getIp())->setMinimumTime(time() - $floodControlTimeFrame * 60));
if ($messagesAmount > $floodControlThreshold) {
$duration = $this->options->getIntegerOption('flood_control_ban_duration', 1440);
$this->bansService->banIpAddress($user->getIp(), $this->bansService->getDurationFromString($duration . 'm'));
}
}
}
// go through the custom filters:
$filterChain = WiseChatContainer::get('services/WiseChatFilterChain');
$filteredMessage = $filterChain->filter($filteredMessage);
// cut the message:
$messageMaxLength = $this->options->getIntegerOption('message_max_length', 100);
if ($messageMaxLength > 0) {
$filteredMessage = substr($filteredMessage, 0, $messageMaxLength);
}
// convert images and links into proper shortcodes and download images (if enabled):
/** @var WiseChatLinksPreFilter $linksPreFilter */
$linksPreFilter = WiseChatContainer::get('rendering/filters/pre/WiseChatLinksPreFilter');
$filteredMessage = $linksPreFilter->filter($filteredMessage, $this->options->isOptionEnabled('allow_post_images'), $this->options->isOptionEnabled('enable_youtube'));
$message = new WiseChatMessage();
$message->setTime(time());
$message->setAdmin($isAdmin);
$message->setUserName($user->getName());
$message->setUserId($user->getId());
$message->setText($filteredMessage);
$message->setChannelName($channel->getName());
$message->setIp($user->getIp());
if ($user->getWordPressId() !== null) {
$message->setWordPressUserId($user->getWordPressId());
}
$message = $this->messagesDAO->save($message);
// mark attachments created by the links pre-filter:
$createdAttachments = $linksPreFilter->getCreatedAttachments();
if (count($createdAttachments) > 0) {
$this->attachmentsService->markAttachmentsWithDetails($createdAttachments, $channel->getName(), $message->getId());
}
return $message;
}