public function clear($key = null)
{
// return true if the cache is already empty
if (!($driver = $this->getDriver())) {
return true;
}
if (!isset($key)) {
unset($driver);
$this->driver = null;
$this->driver = false;
ehough_stash_Utilities::deleteRecursive($this->path);
} else {
$driver->query("DELETE FROM cacheStore WHERE key LIKE '{$key}%'");
}
return true;
}
/**
* Finds the method of encoding that has the cheapest decode needs and encodes the data with that method.
*
* @param string $data
* @return string
*/
protected function encode($data)
{
switch (ehough_stash_Utilities::encoding($data)) {
case 'bool':
$dataString = (bool) $data ? 'true' : 'false';
break;
case 'serialize':
$dataString = 'unserialize(base64_decode(\'' . base64_encode(serialize($data)) . '\'))';
break;
case 'string':
$dataString = sprintf('"%s"', addcslashes($data, "\t\"\$\\"));
break;
case 'none':
default:
if (is_numeric($data)) {
$dataString = (string) $data;
} else {
$dataString = 'base64_decode(\'' . base64_encode($data) . '\')';
}
break;
}
return $dataString;
}
/**
* This function takes an array of strings and turns it into the sqlKey. It does this by iterating through the
* array, running the string through sqlite_escape_string() and then combining that string to the keystring with a
* delimiter.
*
* @param array $key
* @return string
*/
public static function makeSqlKey($key)
{
$key = ehough_stash_Utilities::normalizeKeys($key, 'base64_encode');
$path = '';
foreach ($key as $rawPathPiece) {
$path .= $rawPathPiece . ':::';
}
return $path;
}
/**
* This function clears the data from a key. If a key points to both a directory and a file, both are erased. If
* passed null, the entire cache directory is removed.
*
* @param null|array $key
* @return bool
*/
public function clear($key = null)
{
$path = $this->makePath($key);
if (is_file($path)) {
$return = true;
unlink($path);
}
if (strpos($path, '.php') !== false) {
$path = substr($path, 0, -4);
}
if (is_dir($path)) {
return ehough_stash_Utilities::deleteRecursive($path);
}
return isset($return);
}
public static function tearDownAfterClass()
{
ehough_stash_Utilities::deleteRecursive(ehough_stash_Utilities::getBaseDirectory());
}
public function testCheckEmptyDirectory()
{
$tmp = sys_get_temp_dir() . '/stash/';
$dir2 = $tmp . 'emptytest/';
@mkdir($dir2, 0770, true);
$this->assertTrue(ehough_stash_Utilities::checkForEmptyDirectory($dir2), 'Returns true for empty directories');
$this->assertFalse(ehough_stash_Utilities::checkForEmptyDirectory($tmp), 'Returns false for non-empty directories');
ehough_stash_Utilities::deleteRecursive($tmp);
}
/**
* Turns a key array into a key string. This includes running the indexing functions used to manage the Redis
* hierarchical storage.
*
* When requested the actual path, rather than a normalized value, is returned.
*
* @param array $key
* @param bool $path
* @return string
*/
protected function makeKeyString($key, $path = false)
{
$key = ehough_stash_Utilities::normalizeKeys($key);
$keyString = 'cache:::';
$pathKey = ':pathdb::';
foreach ($key as $name) {
//a. cache:::name
//b. cache:::name0:::sub
$keyString .= $name;
//a. :pathdb::cache:::name
//b. :pathdb::cache:::name0:::sub
$pathKey = ':pathdb::' . $keyString;
$pathKey = md5($pathKey);
if (isset($this->keyCache[$pathKey])) {
$index = $this->keyCache[$pathKey];
} else {
$index = $this->redis->get($pathKey);
$this->keyCache[$pathKey] = $index;
}
//a. cache:::name0:::
//b. cache:::name0:::sub1:::
$keyString .= '_' . $index . ':::';
}
return $path ? $pathKey : md5($keyString);
}
/**
* Turns a key array into a key string. This includes running the indexing functions used to manage the memcached
* hierarchical storage.
*
* When requested the actual path, rather than a normalized value, is returned.
*
* @param array $key
* @param bool $path
* @return string
*/
protected function makeKeyString($key, $path = false)
{
$key = ehough_stash_Utilities::normalizeKeys($key);
$keyString = ':cache:::';
$pathKey = ':pathdb::';
$time = microtime(true);
if ($time - $this->keyCacheTime >= $this->keyCacheTimeLimit) {
$this->keyCacheTime = $time;
$this->keyCache = array();
}
foreach ($key as $name) {
//a. cache:::name
//b. cache:::name0:::sub
$keyString .= $name;
//a. :pathdb::cache:::name
//b. :pathdb::cache:::name0:::sub
$pathKey = ':pathdb::' . $keyString;
$pathKey = md5($pathKey);
if (isset($this->keyCache[$pathKey])) {
$index = $this->keyCache[$pathKey];
} else {
$index = $this->memcache->cas($pathKey, 0);
$this->keyCache[$pathKey] = $index;
}
//a. cache:::name0:::
//b. cache:::name0:::sub1:::
$keyString .= '_' . $index . ':::';
}
return $path ? $pathKey : md5($keyString);
}
/**
* This function clears the data from a key. If a key points to both a directory and a file, both are erased. If
* passed null, the entire cache directory is removed.
*
* {@inheritdoc}
*/
public function clear($key = null)
{
$path = $this->makePath($key);
if (is_file($path)) {
$return = true;
unlink($path);
}
$extension = $this->getEncoder()->getExtension();
if (strpos($path, $extension) !== false) {
$path = substr($path, 0, -strlen($extension));
}
if (is_dir($path)) {
return ehough_stash_Utilities::deleteRecursive($path, true);
}
return isset($return);
}
