/**
*
* @return object|array Response array or WP Error object.
*/
protected function _getHTTPResponseWithCache($sURL, $aArguments = array(), $iCacheDuration = 86400)
{
$_oCacheTable = new AmazonAutoLinks_DatabaseTable_request_cache(AmazonAutoLinks_Registry::$aDatabaseTables['request_cache']);
// If a cache exists, use it.
$_aData = 0 === $iCacheDuration ? array() : $_oCacheTable->getCache($this->sCacheName);
$_aData = $_aData + array('remained_time' => 0, 'charset' => null, 'data' => null);
if ($_aData['remained_time'] && $_aData['data']) {
$this->sLastCharSet = $_aData['charset'];
return $_aData['data'];
}
// @todo maybe implement a mechanism that fetches data in the background
// and return the stored data anyway.
// Otherwise, retrieve a data from a remote server and set a cache.
$_asResponse = file_get_contents($sURL);
$this->sLastCharSet = $this->getCharacterSetFromResponseHeader($http_response_header);
$_oCacheTable->setCache($_sCacheName, $_asResponse, (int) $iCacheDuration, array('request_uri' => $sURL, 'type' => 'file_get_contents', 'charset' => $this->sLastCharSet));
return $_asResponse;
}
/**
* A wrapper method for the get_transient() function.
*
* This method does retrieves the transient with the given transient key. In addition, it checks if it is an array; otherwise, it makes it an array.
*
* @access public
* @since 2.0.0
* @since 3 Changed to use a custom database.
* @remark The scope is public as the event method uses it.
*/
public function getCache($sTransientKey)
{
if ($this->bUseCacheTable) {
$_oCacheTable = new AmazonAutoLinks_DatabaseTable_request_cache(AmazonAutoLinks_Registry::$aDatabaseTables['request_cache']);
$_aData = $_oCacheTable->getCache($sTransientKey);
$vData = $_aData['data'];
} else {
$vData = AmazonAutoLinks_WPUtility::getTransient($sTransientKey);
}
// if it's false, no transient is stored. Otherwise, some values are in there.
if (in_array($vData, array(false, ''), true)) {
return false;
}
// If it's array, okay.
if (is_array($vData)) {
return $vData;
}
// Maybe it's encoded
if (is_string($vData) && is_serialized($vData)) {
return unserialize($vData);
}
// Maybe it's an object. In that case, convert it to an associative array.
if (is_object($vData)) {
return get_object_vars($vData);
}
// It's an unknown type, then cast array.
return (array) $vData;
}
/**
* Deletes the cache of the provided URL.
*/
public function deleteCache()
{
$_oCacheTable = new AmazonAutoLinks_DatabaseTable_request_cache(AmazonAutoLinks_Registry::$aDatabaseTables['request_cache']);
foreach ($this->aURLs as $_sCacheName => $_sURL) {
// @todo implement deleteCaches() method
$_oCacheTable->deleteCache($_sCacheName);
}
}
/**
* Clears expired caches.
* @since 3
* @return void
*/
private function _clearExpiredCaches($oFactory)
{
$_oCacheTable = new AmazonAutoLinks_DatabaseTable_request_cache(AmazonAutoLinks_Registry::$aDatabaseTables['request_cache']);
$_oCacheTable->deleteExpired();
$_oProductTable = new AmazonAutoLinks_DatabaseTable_product(AmazonAutoLinks_Registry::$aDatabaseTables['product']);
$_oProductTable->deleteExpired();
// DELETE FROM table WHERE (col1,col2) IN ((1,2),(3,4),(5,6))
$oFactory->setSettingNotice(__('Caches have been cleared.', 'amazon-auto-links'));
}
