/**
* Gets the relevant part (array of settings) of the ini file for a given pattern.
*
* @param string $pattern
* @return array
*/
private function getIniPart($pattern)
{
$pattern = strtolower($pattern);
$patternhash = Pattern::getHashForParts($pattern);
$subkey = SubKey::getIniPartCacheSubKey($patternhash);
if (!$this->cache->hasItem('browscap.iniparts.' . $subkey, true)) {
$this->logger->debug('cache key "browscap.iniparts.' . $subkey . '" not found');
return [];
}
$success = null;
$file = $this->cache->getItem('browscap.iniparts.' . $subkey, true, $success);
if (!$success) {
$this->logger->debug('cache key "browscap.iniparts.' . $subkey . '" not found');
return [];
}
if (!is_array($file) || !count($file)) {
$this->logger->debug('cache key "browscap.iniparts.' . $subkey . '" was empty');
return [];
}
$propertyFormatter = new PropertyFormatter(new PropertyHolder());
$return = [];
foreach ($file as $buffer) {
list($tmpBuffer, $patterns) = explode("\t", $buffer, 2);
if ($tmpBuffer === $patternhash) {
$return = json_decode($patterns, true);
foreach (array_keys($return) as $property) {
$return[$property] = $propertyFormatter->formatPropertyValue($return[$property], $property);
}
break;
}
}
return $return;
}
/**
* Gets some possible patterns that have to be matched against the user agent. With the given
* user agent string, we can optimize the search for potential patterns:
* - We check the first characters of the user agent (or better: a hash, generated from it)
* - We compare the length of the pattern with the length of the user agent
* (the pattern cannot be longer than the user agent!)
*
* @param string $userAgent
*
* @return \Generator
*/
public function getPatterns($userAgent)
{
$starts = Pattern::getHashForPattern($userAgent, true);
$length = strlen($userAgent);
// add special key to fall back to the default browser
$starts[] = str_repeat('z', 32);
// get patterns, first for the given browser and if that is not found,
// for the default browser (with a special key)
foreach ($starts as $tmpStart) {
$tmpSubkey = SubKey::getPatternCacheSubkey($tmpStart);
if (!$this->cache->hasItem('browscap.patterns.' . $tmpSubkey, true)) {
$this->logger->debug('cache key "browscap.patterns.' . $tmpSubkey . '" not found');
continue;
}
$success = null;
$file = $this->cache->getItem('browscap.patterns.' . $tmpSubkey, true, $success);
if (!$success) {
$this->logger->debug('cache key "browscap.patterns.' . $tmpSubkey . '" not found');
continue;
}
if (!is_array($file) || !count($file)) {
$this->logger->debug('cache key "browscap.patterns.' . $tmpSubkey . '" was empty');
continue;
}
$found = false;
foreach ($file as $buffer) {
list($tmpBuffer, $len, $patterns) = explode("\t", $buffer, 3);
if ($tmpBuffer === $tmpStart) {
if ($len <= $length) {
(yield trim($patterns));
}
$found = true;
} elseif ($found === true) {
break;
}
}
}
(yield '');
}
/**
* stores the version of the ini file into cache
*
* @return \BrowscapPHP\Helper\Converter
*/
public function storeVersion()
{
$this->cache->setItem('browscap.version', $this->iniVersion, false);
return $this;
}
