/**
* API callback for mollom.checkContent to perform textual analysis.
*
* @todo Add support for 'redirect' and 'refresh' values.
*/
protected function checkContent($data)
{
$response = array();
// If only a single value for checks is passed, it is a string.
if (isset($data['checks']) && is_string($data['checks'])) {
$data['checks'] = array($data['checks']);
}
$header = $this->parser->getRestOAuthHeader();
$publicKey = $header['oauth_consumer_key'];
// Fetch blacklist.
$blacklist = $this->state()->get(self::KEY_BLACKLIST . '_' . $publicKey, array());
// Determine content keys to analyze.
$post_keys = array('postTitle' => 1, 'postBody' => 1);
$type = FALSE;
if (isset($data['type']) && in_array($data['type'], array('user'))) {
$type = $data['type'];
if ($type == 'user') {
$post_keys += array('authorName' => 1, 'authorMail' => 1);
}
}
$post = implode('\\n', array_intersect_key($data, $post_keys));
$update = isset($data['stored']);
// Spam filter: Check post_title and post_body for ham, spam, or unsure.
if (!$update && (!isset($data['checks']) || in_array('spam', $data['checks']))) {
$spam = FALSE;
$ham = FALSE;
// 'spam' always has precedence.
if (strpos($post, 'spam') !== FALSE) {
$spam = TRUE;
} elseif (strpos($post, 'ham') !== FALSE) {
$ham = TRUE;
} elseif (strpos($post, 'unsure') !== FALSE) {
// Enabled unsure mode.
if (!isset($data['unsure']) || $data['unsure']) {
$spam = TRUE;
$ham = TRUE;
} else {
$spam = FALSE;
$ham = TRUE;
}
}
// Check blacklist.
if ($matches = $this->checkBlacklist($post, $blacklist, 'spam')) {
$spam = TRUE;
$ham = FALSE;
$response['reason'] = 'blacklist';
$response['blacklistSpam'] = $matches;
}
if ($spam && $ham) {
$response['spamScore'] = 0.5;
$response['spamClassification'] = 'unsure';
$qualityScore = 0.5;
} elseif ($spam) {
$response['spamScore'] = 1.0;
$response['spamClassification'] = 'spam';
$qualityScore = 0.0;
} elseif ($ham) {
$response['spamScore'] = 0.0;
$response['spamClassification'] = 'ham';
$qualityScore = 1.0;
} else {
$response['spamScore'] = 0.5;
$response['spamClassification'] = 'unsure';
$qualityScore = NULL;
}
// In case a previous spam check was unsure and a CAPTCHA was solved, the
// result is supposed to be ham - unless the new content is spam.
if (!empty($data['id']) && $response['spamClassification'] == 'unsure') {
$content_captchas = $this->state()->get(self::KEY_CONTENT_CAPTCHA, array());
if (!empty($content_captchas[$data['id']])) {
$response['spamScore'] = 0.0;
$response['spamClassification'] = 'ham';
}
}
}
// Quality filter.
if (isset($data['checks']) && in_array('quality', $data['checks'])) {
if (isset($qualityScore)) {
$response['qualityScore'] = $qualityScore;
} else {
$response['qualityScore'] = 0;
}
}
// Profanity filter.
if (isset($data['checks']) && in_array('profanity', $data['checks'])) {
$profanityScore = 0.0;
if (strpos($post, 'profanity') !== FALSE) {
$profanityScore = 1.0;
}
// Check blacklist.
if ($matches = $this->checkBlacklist($post, $blacklist, 'profanity')) {
$profanityScore = 1.0;
$response['blacklistProfanity'] = $matches;
}
$response['profanityScore'] = $profanityScore;
}
// Language detection.
if (isset($data['checks']) && in_array('language', $data['checks'])) {
$languages = array();
if (stripos($post, 'ist seit der Mitte')) {
$languages[] = array('languageCode' => 'de');
}
if (stripos($post, 'it is the most populous city')) {
$languages[] = array('languageCode' => 'en');
}
if (count($languages) == 0) {
$languages[] = array('languageCode' => 'zxx');
}
$score = 1 / count($languages);
foreach ($languages as $id => &$langObj) {
$langObj['languageScore'] = $score;
}
if (count($languages) === 1) {
$response['languages']['language'] = reset($languages);
} else {
$response['languages'] = [$languages];
}
}
$storage = $this->state()->get(self::KEY_CONTENT, array());
$contentId = !empty($data['id']) ? $data['id'] : md5(mt_rand());
if (isset($storage[$contentId])) {
$storage[$contentId] = array_merge($storage[$contentId], $data);
} else {
$storage[$contentId] = $data;
}
if ($update) {
$response = array_merge($storage[$contentId], $response);
}
$response['id'] = $contentId;
$this->state()->set(self::KEY_CONTENT, $storage);
return $response;
}
