public static function Fetch($echo = false)
{
$since_id = (int) SocialMediaSettings::getValue('TwitterIndex');
if ($since_id == 0) {
$since_id = 1;
}
//Twitter gives an error message if since_id is zero. This happens when tweets are fetched the first time.
$tweets = self::Connection()->get('statuses/user_timeline', array('since_id' => $since_id, 'count' => 200, 'include_rts' => true, 'exclude_replies' => true, 'screen_name' => self::config()->username));
if (self::Error()) {
user_error("Twitter error: " . self::ErrorMessage($tweets));
return false;
}
$updates = array();
$max_id = (int) SocialMediaSettings::getValue('TwitterIndex');
$skipped = 0;
$translatable_locale_filter = Translatable::disable_locale_filter();
//ID filtering does not work well if locale filtering is on.
foreach ($tweets as $tweet) {
if (!DataObject::get('BlogPost')->filter('TwitterID', $tweet->id)->exists()) {
//Do not supply the tweet if a DataObject with the same Twitter ID already exists.
//However, $max_id can still be updated with the already existing ID number. This will
//Ensure we do not have to loop over this tweet again.
$updates[] = self::tweet_to_array($tweet);
} else {
$skipped++;
}
$max_id = max($max_id, (int) $tweet->id);
}
Translatable::enable_locale_filter($translatable_locale_filter);
if ($echo and $skipped > 0) {
echo "Twitter: Skipped {$skipped} existing records. This is normal if its only a few records occasionally, but if it happens every time and the number is constant or raises, then the Twitter's 'since_id' parameter is not working correctly. If the count reaches 200, it might be that you won't get any new records at all, because Twitter's maximum count for returned records per query is 200 at the moment when writing this (January 2016). Also constant skipping might affect performance.<br />";
}
if ($echo) {
echo "Twitter: since_id was {$since_id} and is now {$max_id}.<br />";
}
SocialMediaSettings::setValue('TwitterIndex', $max_id);
//Keep track of where we left, so we don't get the same tweets next time.
return $updates;
}
private static function getObject()
{
if (self::$object) {
return self::$object;
}
self::$object = DataObject::get_one(__CLASS__);
if (!self::$object) {
self::$object = new self();
}
return self::$object;
}