public function fetchFeed($vURLs, $numItems = 0, $fCacheRenew = false)
{
$arrURLs = is_array($vURLs) ? $vURLs : (array) $vURLs;
$strURLID = md5(serialize($arrURLs));
if (!isset($this->arrFeedItems[$strURLID]) && $fCacheRenew == false) {
$this->arrFeedItems[$strURLID] = FetchTweets_WPUtilities::getTransient($this->strTransientPrefix . $strURLID, array());
unset($this->arrFeedItems[$strURLID][0]);
// casting array causes the 0 key,
}
// If it's out of stock, fill the array by fetching the feed.
if (empty($this->arrFeedItems[$strURLID])) {
// When an array of urls is passed to the Simple Pie's set_feed_url() method, the memory usage increases largely.
// So fetch the feeds one by one per url and store the output into an array.
foreach ($arrURLs as $strURL) {
$oFeed = $this->getFeedObj($strURL, null, $fCacheRenew ? 0 : 3600);
foreach ($oFeed->get_items() as $oItem) {
// foreach ( $oFeed->get_items( 0, $numItems * 3 ) as $item ) does not change the memory usage
$this->arrFeedItems[$strURLID][$oItem->get_title()] = array('strContent' => $oItem->get_content(), 'description' => $oItem->get_description(), 'title' => $oItem->get_title(), 'strDate' => $oItem->get_title(), 'strAuthor' => $oItem->get_date('j F Y, g:i a'), 'strLink' => $oItem->get_permalink());
}
// For PHP below 5.3 to release the memory.
$oFeed->__destruct();
// Do what PHP should be doing on it's own.
unset($oFeed);
}
// This life span should be little longer than the feed cache life span, which is 1700.
FetchTweets_WPUtilities::setTransient($this->strTransientPrefix . $strURLID, $this->arrFeedItems[$strURLID], 1800);
// 30 minutes
}
$arrOut = $this->arrFeedItems[$strURLID];
if ($numItems) {
array_splice($arrOut, ${$numItems});
}
return $arrOut;
}
/**
*
* @see https://dev.twitter.com/docs/api/1.1/get/application/rate_limit_status
*/
public function getStatus()
{
// Return the cached response if available.
$_sCacheID = FetchTweets_Commons::TransientPrefix . '_' . md5(serialize(array($this->sConsumerKey, $this->sConsumerSecret, $this->sAccessToken, $this->sAccessSecret)));
$_vData = FetchTweets_WPUtilities::getTransient($_sCacheID);
if (false !== $_vData) {
return $_vData;
}
// Perform the requests.
$_oConnect = new FetchTweets_TwitterOAuth($this->sConsumerKey, $this->sConsumerSecret, $this->sAccessToken, $this->sAccessSecret);
$_aUser = $_oConnect->get('account/verify_credentials');
// If the user id could not be retrieved, it means it failed.
if (!isset($_aUser['id']) || !$_aUser['id']) {
return array();
}
// Otherwise, it is okay. Retrieve the current status.
$_aStatusKeys = apply_filters('fetch_tweets_filter_request_rate_limit_status_keys', array('statuses', 'search', 'lists'));
// keys can be added such as 'help', 'users' etc
$_aStatus = $_oConnect->get('https://api.twitter.com/1.1/application/rate_limit_status.json?resources=' . implode(',', $_aStatusKeys));
// Set the cache.
$_aData = is_array($_aStatus) ? $_aUser + $_aStatus : $_aUser;
FetchTweets_WPUtilities::setTransient($_sCacheID, $_aData, 60);
// stores the cache only for 60 seconds.
return $_aData;
}
/**
* Redirects to the twitter to get authenticated.
*
* @since 1.3.0
* @since 2.4.5 Moved from the admin page class.
* @remark This is redirected from the "Connect to Twitter" button.
*/
private function _redirect()
{
/* Build TwitterOAuth object with client credentials. */
$_oConnect = new FetchTweets_TwitterOAuth(FetchTweets_Commons::ConsumerKey, FetchTweets_Commons::ConsumerSecret);
/* Get temporary credentials - Requesting authentication tokens, the parameter is the URL we will be redirected to. */
$_aRequestToken = $_oConnect->getRequestToken(add_query_arg(array('post_type' => 'fetch_tweets', 'page' => 'fetch_tweets_settings', 'tab' => 'twitter_callback'), admin_url($GLOBALS['pagenow'])));
/* Save temporary credentials to transient. */
$_aTemporaryTokens = array();
$_aTemporaryTokens['oauth_token'] = $_aRequestToken['oauth_token'];
$_aTemporaryTokens['oauth_token_secret'] = $_aRequestToken['oauth_token_secret'];
FetchTweets_WPUtilities::setTransient(FetchTweets_Commons::TransientPrefix . '_oauth', $_aTemporaryTokens, 60 * 10);
// 10 minutes
/* If last connection failed don't display authorization link. */
switch ($_oConnect->http_code) {
case 200:
/* Build authorize URL and redirect user to Twitter. */
wp_redirect($_oConnect->getAuthorizeURL($_aTemporaryTokens['oauth_token']));
// goes to twitter.com
break;
default:
/* Show notification if something went wrong. */
die(__('Could not connect to Twitter. Refresh the page or try again later.', 'fetch-tweets'));
}
exit;
}
/**
* Re-saves the cache after adding oEmbed elements.
*
* @since 1.3.0
*/
public function _replyToAddOEmbedElements($sRequestURI)
{
$strTransientKey = FetchTweets_Commons::TransientPrefix . "_" . md5($sRequestURI);
// Check if the transient is locked
$strLockTransient = FetchTweets_Commons::TransientPrefix . '_' . md5("LockOEm_" . trim($strTransientKey));
// up to 40 characters, the prefix can be up to 8 characters
if (false !== FetchTweets_WPUtilities::getTransient($strLockTransient)) {
return;
// it means the cache is being modified.
}
// Set a lock flag transient that indicates the transient is being renewed.
FetchTweets_WPUtilities::setTransient($strLockTransient, true, FetchTweets_Utilities::getAllowedMaxExecutionTime());
// Perform oEmbed caching - no API request will be performed
$oFetch = new FetchTweets_Fetch();
// structure: array( 'mod' => time(), 'data' => $this->oBase64->encode( $vData ) ),
$arrTransient = $oFetch->getTransient($strTransientKey);
// If the mandatory keys are not set, it's broken.
if (!isset($arrTransient['mod'], $arrTransient['data'])) {
FetchTweets_WPUtilities::deleteTransient($strTransientKey);
return;
}
$arrTweets = (array) $this->oBase64->decode($arrTransient['data']);
$oFetch->addEmbeddableMediaElements($arrTweets);
// the array is passed as reference.
// Re-save the cache.
// FetchTweets_Debug::logArray( 'saving oembed transient' );
$oFetch->setTransient($sRequestURI, $arrTweets, $arrTransient['mod'], true);
// the method handles the encoding.
// Delete the lock transient
FetchTweets_WPUtilities::deleteTransient($strLockTransient);
}
/**
* A wrapper method for the set_transient() function.
*
* @since 1.2.0
* @since 1.3.0 Made it public as the event method uses it.
*/
public function setTransient($sRequestURI, $vData, $iTime = null, $bIgnoreLock = false)
{
$_sTransientKey = FetchTweets_Commons::TransientPrefix . "_" . md5(trim($sRequestURI));
$_sLockTransient = FetchTweets_Commons::TransientPrefix . '_' . md5("Lock_" . $_sTransientKey);
// Give some time to the server to store transients in case of simultaneous accesses.
if (FetchTweets_Cron::isBackground()) {
sleep(1);
}
// Check if the transient is locked.
if (!$bIgnoreLock && false !== FetchTweets_WPUtilities::getTransient($_sLockTransient)) {
return;
// it means the cache is being modified.
}
// Set a lock flag transient that indicates the transient is being renewed.
if (!$bIgnoreLock) {
FetchTweets_WPUtilities::setTransient($_sLockTransient, 'locked', 10);
}
// Store the cache
$_bIsSet = FetchTweets_WPUtilities::setTransient($_sTransientKey, array('mod' => $iTime ? $iTime : time(), 'data' => $this->oBase64->encode($vData)));
if (!$_bIsSet) {
return;
}
// Schedule the action to run in the background with WP Cron. If already scheduled, skip.
// This adds the embedding elements which takes some time to process.
$_aArgs = array($sRequestURI);
if ($iTime || wp_next_scheduled('fetch_tweets_action_transient_add_oembed_elements', $_aArgs)) {
return;
}
wp_schedule_single_event(time(), 'fetch_tweets_action_transient_add_oembed_elements', $_aArgs);
if ('intense' == $this->oOption->aOptions['cache_settings']['caching_mode']) {
FetchTweets_Cron::see(array(), true);
} else {
// $this->arrExpiredTransientsRequestURIs
wp_remote_get(site_url("/wp-cron.php"), array('timeout' => 0.01, 'sslverify' => false));
}
// Delete the lock transient
// FetchTweets_WPUtilities::deleteTransient( $_sLockTransient );
}
/**
* Validates submitted form data of the page.
* @remark validation_{page slug}
*
* @since unknown
* @since 2.4.5 Changed the name from 'validation_fetch_tweets_add_rule_by_list'.
*/
public function validatePageFormData($aInput, $aOldInput, $oFactory, $aSubmitInformation)
{
// Check if the input has been properly sent.
if (!isset($aInput['add_rule_by_list']['list_owner_screen_name'], $aInput['add_rule_by_list']['list_owner_accounts'])) {
$oFactory->setSettingNotice(__('Something went wrong. Your input could not be received. Try again and if this happens again, contact the developer.', 'fetch-tweets'));
return $aOldInput;
}
$_aCredentials = $this->_getCredentiaslByAccountID($aInput['add_rule_by_list']['list_owner_accounts']);
// Variables
$_aErrors = array();
// error array
$_iAccountID = $aInput['add_rule_by_list']['list_owner_accounts'] == -1 ? 0 : $aInput['add_rule_by_list']['list_owner_accounts'];
$_sOwnerScreenName = $aInput['add_rule_by_list']['list_owner_accounts'] == '-1' ? $aInput['add_rule_by_list']['list_owner_screen_name'] : $_aCredentials['screen_name'];
// The list owner screen name must be provided.
if (empty($_sOwnerScreenName)) {
$_aErrors['add_rule_by_list']['list_owner_screen_name'] = __('The screen name of the list owner must be specified: ') . $_sOwnerScreenName;
$oFactory->setFieldErrors($_aErrors);
$oFactory->setSettingNotice(__('There was an error in your input.', 'fetch-tweets'));
return $aOldInput;
}
// Fetch the lists by the screen name.
$_oFetch = new FetchTweets_Fetch($_aCredentials['consumer_key'], $_aCredentials['consumer_secret'], $_aCredentials['access_token'], $_aCredentials['access_secret']);
$_aLists = $_oFetch->getListNamesFromScreenName($_sOwnerScreenName, $_iAccountID);
if (empty($_aLists)) {
$oFactory->setSettingNotice(__('No list found.', 'fetch-tweets'));
return $aOldInput;
}
// Set the transient of the fetched IDs. This will be used right next page load.
$_sListCacheID = uniqid();
FetchTweets_WPUtilities::setTransient($_sListCacheID, $_aLists, 60);
exit(wp_redirect(add_query_arg(array('post_type' => FetchTweets_Commons::PostTypeSlug, 'tweet_type' => 'list', 'list_cache' => $_sListCacheID, 'screen_name' => $_sOwnerScreenName, 'account_id' => $_iAccountID), admin_url('post-new.php'))));
}
/**
* A callback for the accessSiteAtShutDown() method.
*
* @since 1.0.0
*/
public static function _replyToAccessSite()
{
// Retrieve the plugin scheduled tasks array.
$_sTransientName = md5(get_class());
$_aTasks = FetchTweets_WPUtilities::getTransient($_sTransientName);
$_aTasks = $_aTasks ? $_aTasks : array();
$_nNow = microtime(true);
// Check the excessive background call protection interval
if (!self::$_fIgnoreLock) {
$_nCalled = isset($_aTasks['called']) ? $_aTasks['called'] : 0;
if ($_nCalled + self::$_iLockBackgroundCallInterval > $_nNow) {
return;
// if it's called within 10 seconds from the last time of calling this method, do nothing to avoid excessive calls.
}
}
// Renew the called time.
$_aFlagKeys = array('called' => $_nNow);
FetchTweets_WPUtilities::setTransient($_sTransientName, $_aFlagKeys + $_aTasks, self::getAllowedMaxExecutionTime());
// set a locked key so it prevents duplicated function calls due to too many calls caused by simultaneous accesses.
// Compose a GET query array
$_aGet = self::$_aGet;
if (defined('WP_DEBUG')) {
$_aGet['debug'] = WP_DEBUG;
}
unset($_aGet[0]);
// Load the site in the background.
wp_remote_get(site_url('?' . http_build_query($_aGet)), array('timeout' => 0.01, 'sslverify' => false, 'cookies' => $_aFlagKeys + array($_sTransientName => true)));
}
