public function __construct()
{
// Objects
$this->oBase64 = new FetchTweets_Base64();
// For transient (cache) renewal events
add_action('fetch_tweets_action_transient_renewal', array($this, '_replyToRenewTransients'));
// For transient (cache) formatting events - adds oEmbed elements.
add_action('fetch_tweets_action_transient_add_oembed_elements', array($this, '_replyToAddOEmbedElements'));
// For SimplePie cache renewal events
add_action('fetch_tweets_action_simplepie_renew_cache', array($this, '_replyToRenewSimplePieCaches'));
// This must be called after the above action hooks are added.
if ('intense' == $GLOBALS['oFetchTweets_Option']->aOptions['cache_settings']['caching_mode']) {
new FetchTweets_Cron(apply_filters('fetch_tweets_filter_plugin_cron_actions', array('fetch_tweets_action_transient_renewal', 'fetch_tweets_action_transient_add_oembed_elements', 'fetch_tweets_action_simplepie_renew_cache')));
} else {
if (FetchTweets_Cron::isBackground()) {
exit;
}
}
// Redirects
if (isset($_GET['fetch_tweets_link']) && $_GET['fetch_tweets_link']) {
$_oRedirect = new FetchTweets_Redirects();
$_oRedirect->go($_GET['fetch_tweets_link']);
// will exit there.
}
// Draw the cached image.
if (isset($_GET['fetch_tweets_image']) && $_GET['fetch_tweets_image'] && is_user_logged_in()) {
$_oImageLoader = new FetchTweets_ImageHandler('FTWS');
$_oImageLoader->draw($_GET['fetch_tweets_image']);
exit;
}
// For the activation hook
add_action('fetch_tweets_action_setup_transients', array($this, '_replyToSetUpTransients'));
}
public function _replyToUpdateCacheItems()
{
if (null !== self::$_bUpdateCacheCalled) {
return;
}
self::$_bUpdateCacheCalled = true;
if (empty($this->arrExpiredTransientsRequestURIs)) {
return;
}
// Perform multi-dimensional array_unique()
// @deprecated As of v2.3.5 the request URI is set to the key, so it is already unique by default.
// $this->arrExpiredTransientsRequestURIs = array_map( "unserialize", array_unique( array_map( "serialize", $this->arrExpiredTransientsRequestURIs ) ) );
$_iScheduled = 0;
foreach ($this->arrExpiredTransientsRequestURIs as $_aExpiredCacheRequest) {
/* the structure of $_aExpiredCacheRequest = array(
'URI' => the API request URI
'key' => the array key that holds the result. e.g. for search results, the 'statuses' key holds the fetched tweets.
'rate_limit_status_key' => the array holding the representation of the rate limit status dimensional key.
*/
// Check if the URI key holds a valid url.
if (!filter_var($_aExpiredCacheRequest['URI'], FILTER_VALIDATE_URL)) {
continue;
}
// Schedules the action to run in the background with WP Cron.
// If already scheduled, skip.
$_aArgs = array($_aExpiredCacheRequest);
if (wp_next_scheduled('fetch_tweets_action_transient_renewal', $_aArgs)) {
continue;
}
wp_schedule_single_event(time(), 'fetch_tweets_action_transient_renewal', $_aArgs);
$_iScheduled++;
}
if (!$_iScheduled) {
return;
}
// Call the background process.
if ('intense' == $this->oOption->aOptions['cache_settings']['caching_mode']) {
FetchTweets_Cron::see();
return;
}
wp_remote_get(site_url("/wp-cron.php"), array('timeout' => 0.01, 'sslverify' => false));
}
/**
* Accesses the site in the background at the end of the script execution.
*
* This is used to trigger cron events in the background and sets a static flag so that it ensures it is done only once per page load.
*
* @since 1.0.0
*/
public static function see($aGet = array(), $fIgnoreLock = false)
{
if (isset($_GET['doing_wp_cron'])) {
return;
}
// WP Cron
if (isset($GLOBALS['pagenow']) && $GLOBALS['pagenow'] == 'admin-ajax.php') {
return;
}
// WP Heart-beat API
// Ensures the task is done only once in a page load.
static $_bIsCalled;
if ($_bIsCalled) {
return;
}
$_bIsCalled = true;
// Store the static properties.
self::$_fIgnoreLock = $fIgnoreLock ? $fIgnoreLock : self::$_fIgnoreLock;
self::$_aGet = (array) $aGet + self::$_aGet;
$_sSelfClassName = get_class();
if (did_action('shutdown')) {
self::_replyToAccessSite();
return;
// important as what the action has performed does not mean the action never will be fired again.
}
add_action('shutdown', "{$_sSelfClassName}::_replyToAccessSite", 999);
// do not pass self::_replyToAccessSite.
}
