public function searchTwitter()
{
date_default_timezone_set('America/Los_Angeles');
Yii::trace('start searchTwitter ' . date('y-m-d h:m '));
// Load your Twitter application keys
$settings = array('oauth_access_token' => \Yii::$app->params['twitter']['oauth_token'], 'oauth_access_token_secret' => \Yii::$app->params['twitter']['oauth_secret'], 'consumer_key' => \Yii::$app->params['twitter']['key'], 'consumer_secret' => \Yii::$app->params['twitter']['secret']);
// Connect to Twitter
$twitter = new TwitterAPIExchange($settings);
// Query settings for search
$url = 'https://api.twitter.com/1.1/search/tweets.json';
$requestMethod = 'GET';
// rate limit of 180 queries
$limit = 180;
$query_count = 1;
$count = 100;
$result_type = 'recent';
// calculate valid timestamp range
$valid_start = $this->start_at;
// $until_date and $valid_end = // start time + duration
$valid_end = $this->start_at + $this->duration * 60;
Yii::trace('Valid Range: ' . $valid_start . ' -> ' . $valid_end);
$until_date = date('Y-m-d', $valid_end + 24 * 3600);
// add one day
$distance_km = $this->distance / 1000;
// distance in km
// Unused: &since=$since_date
// $since_date = '2015-03-05';
// Perform first query with until_date
$getfield = "?result_type={$result_type}&geocode=" . $this->latitude . "," . $this->longitude . "," . $distance_km . "mi&include_entities=false&until={$until_date}&count={$count}";
$tweets = json_decode($twitter->setGetfield($getfield)->buildOauth($url, $requestMethod)->performRequest());
if (isset($tweets->errors)) {
Yii::$app->session->setFlash('error', 'Twitter Rate Limit Reached.');
Yii::error($tweets->errors[0]->message);
return;
}
$max_id = 0;
Yii::trace('Count Statuses: ' . count($tweets->statuses));
Yii::trace('Max Tweet Id: ' . $max_id);
foreach ($tweets->statuses as $t) {
// check if tweet in valid time range
$unix_created_at = strtotime($t->created_at);
Yii::trace('Tweet @ ' . $t->created_at . ' ' . $unix_created_at . ':' . $t->user->screen_name . ' ' . (isset($t->text) ? $t->text : ''));
if ($unix_created_at >= $valid_start && $unix_created_at <= $valid_end) {
// print_r($t);
$i = new Twitter();
$i->add($this->id, $t->id_str, $t->user->id_str, $t->user->screen_name, $unix_created_at, isset($t->text) ? $t->text : '');
}
if ($max_id == 0) {
$max_id = intval($t->id_str);
} else {
$max_id = min($max_id, intval($t->id_str));
}
}
$count_repeat_max = 0;
// Perform all subsequent queries with addition of updated maximum_tweet_id
while ($query_count <= $limit) {
$prior_max_id = $max_id;
$query_count += 1;
Yii::trace('Request #: ' . $query_count);
// Perform subsequent query with max_id
$getfield = "?result_type={$result_type}&geocode=" . $this->latitude . "," . $this->longitude . "," . $distance_km . "mi&include_entities=false&max_id={$max_id}&count={$count}";
$tweets = json_decode($twitter->setGetfield($getfield)->buildOauth($url, $requestMethod)->performRequest());
if (isset($tweets->errors)) {
Yii::$app->session->setFlash('error', 'Twitter Rate Limit Reached.');
Yii::error($tweets->errors[0]->message);
return;
}
// sometimes twitter api fails
if (!isset($tweets->statuses)) {
continue;
}
Yii::trace('Count Statuses: ' . count($tweets->statuses));
Yii::trace('Max Tweet Id: ' . $max_id);
foreach ($tweets->statuses as $t) {
// check if tweet in valid time range
$unix_created_at = strtotime($t->created_at);
if ($unix_created_at >= $valid_start && $unix_created_at <= $valid_end) {
$i = new Twitter();
$i->add($this->id, $t->id_str, $t->user->id_str, $t->user->screen_name, $unix_created_at, isset($t->text) ? $t->text : '');
} else {
if ($unix_created_at < $valid_start) {
// stop querying when earlier than valid_start
return;
}
}
$max_id = min($max_id, intval($t->id_str)) - 1;
}
if ($prior_max_id - $max_id <= 1 or count($tweets->statuses) < 1) {
$count_repeat_max += 1;
}
if ($count_repeat_max > 5) {
// when the api isn't returning more results
break;
}
}
// end while
}
