public function TwitterSentiment($tweet_text)
{
require_once 'DatumboxAPI.php';
$api_key = 'd4a4b20a7ed191960a123464873ebfb4';
$DatumboxAPI = new DatumboxAPI($api_key);
// PHP makes problems with "@" in HTTP POST --> workaround.
$tweet_escaped = addcslashes($tweet_text, '@');
$DocumentClassification['TwitterSentimentAnalysis'] = $DatumboxAPI->TwitterSentimentAnalysis($tweet_escaped);
unset($DatumboxAPI);
//Return the result
if (isset($DocumentClassification['TwitterSentimentAnalysis'])) {
return $DocumentClassification['TwitterSentimentAnalysis'];
} else {
return "none";
}
}
protected function findSentiment($tweets)
{
$DatumboxAPI = new DatumboxAPI($this->datumbox_api_key);
//initialize the DatumboxAPI client
$results = array();
foreach ($tweets['statuses'] as $tweet) {
//foreach of the tweets that we received
if (isset($tweet['metadata']['iso_language_code']) && $tweet['metadata']['iso_language_code'] == 'en') {
//perform sentiment analysis only for the English Tweets
$sentiment = $DatumboxAPI->TwitterSentimentAnalysis($tweet['text']);
//call Datumbox service to get the sentiment
if ($sentiment != false) {
//if the sentiment is not false, the API call was successful.
$results[] = array('id' => $tweet['id_str'], 'user' => $tweet['user']['name'], 'time' => $tweet['created_at'], 'text' => $tweet['text'], 'url' => 'https://twitter.com/' . $tweet['user']['name'] . '/status/' . $tweet['id_str'], 'sentiment' => $sentiment);
}
}
}
unset($tweets);
unset($DatumboxAPI);
return $results;
}
/**
* Finds the Sentiment for a list of Facebook posts.
*
* @param array $posts List of posts coming from Facebook's API
*
* @param array $posts
*/
protected function findSentiment($posts)
{
$DatumboxAPI = new DatumboxAPI($this->datumbox_api_key);
//initialize the DatumboxAPI client
$results = array();
if (!isset($posts['data'])) {
return $results;
}
foreach ($posts['data'] as $post) {
//foreach of the posts that we received
$message = isset($post['message']) ? $post['message'] : '';
if (isset($post['caption'])) {
$message .= "\n\n" . $post['caption'];
}
if (isset($post['description'])) {
$message .= "\n\n" . $post['description'];
}
if (isset($post['link'])) {
$message .= "\n\n" . $post['link'];
}
$message = trim($message);
if ($message != '') {
$sentiment = $DatumboxAPI->SentimentAnalysis(strip_tags($message));
//call Datumbox service to get the sentiment
if ($sentiment != false) {
//if the sentiment is not false, the API call was successful.
$tmp = explode('_', $post['id']);
if (!isset($tmp[1])) {
$tmp[1] = '';
}
$results[] = array('id' => $post['id'], 'user' => $post['from']['name'], 'text' => $message, 'url' => 'https://www.facebook.com/' . $tmp[0] . '/posts/' . $tmp[1], 'sentiment' => $sentiment);
}
}
}
unset($posts);
unset($DatumboxAPI);
return $results;
}
