/**
* Gets the settings for a given pattern (method calls itself to
* get the data from the parent patterns)
*
* @param string $pattern
* @param array $settings
* @return array
*/
public function getSettings($pattern, array $settings = [])
{
// The pattern has been pre-quoted on generation to speed up the pattern search,
// but for this check we need the unquoted version
$unquotedPattern = $this->quoter->pregUnQuote($pattern);
// Try to get settings for the pattern
$addedSettings = $this->getIniPart($unquotedPattern);
// set some additional data
if (count($settings) === 0) {
// The optimization with replaced digits get can now result in setting searches, for which we
// won't find a result - so only add the pattern information, is settings have been found.
//
// If not an empty array will be returned and the calling function can easily check if a pattern
// has been found.
if (count($addedSettings) > 0) {
$settings['browser_name_regex'] = '/^' . $pattern . '$/';
$settings['browser_name_pattern'] = $unquotedPattern;
}
}
// check if parent pattern set, only keep the first one
$parentPattern = null;
if (isset($addedSettings['Parent'])) {
$parentPattern = $addedSettings['Parent'];
if (isset($settings['Parent'])) {
unset($addedSettings['Parent']);
}
}
// merge settings
$settings += $addedSettings;
if ($parentPattern !== null) {
return $this->getSettings($this->quoter->pregQuote($parentPattern), $settings);
}
return $settings;
}
/**
* Creates new pattern cache files
*
* @param string $content
*
* @return \Generator
*/
public function createPatterns($content)
{
// get all relevant patterns from the INI file
// - containing "*" or "?"
// - not containing "*" or "?", but not having a comment
preg_match_all('/(?<=\\[)(?:[^\\r\\n]*[?*][^\\r\\n]*)(?=\\])|(?<=\\[)(?:[^\\r\\n*?]+)(?=\\])(?![^\\[]*Comment=)/m', $content, $matches);
if (empty($matches[0]) || !is_array($matches[0])) {
(yield []);
return;
}
$quoterHelper = new Quoter();
$matches = $matches[0];
usort($matches, [$this, 'compareBcStrings']);
// build an array to structure the data. this requires some memory, but we need this step to be able to
// sort the data in the way we need it (see below).
$data = [];
foreach ($matches as $pattern) {
if ('GJK_Browscap_Version' === $pattern) {
continue;
}
$pattern = strtolower($pattern);
$patternhash = Pattern::getHashForPattern($pattern, false);
$tmpLength = Pattern::getPatternLength($pattern);
// special handling of default entry
if ($tmpLength === 0) {
$patternhash = str_repeat('z', 32);
}
if (!isset($data[$patternhash])) {
$data[$patternhash] = [];
}
if (!isset($data[$patternhash][$tmpLength])) {
$data[$patternhash][$tmpLength] = [];
}
$pattern = $quoterHelper->pregQuote($pattern);
// Check if the pattern contains digits - in this case we replace them with a digit regular expression,
// so that very similar patterns (e.g. only with different browser version numbers) can be compressed.
// This helps to speed up the first (and most expensive) part of the pattern search a lot.
if (strpbrk($pattern, '0123456789') !== false) {
$compressedPattern = preg_replace('/\\d/', '[\\d]', $pattern);
if (!in_array($compressedPattern, $data[$patternhash][$tmpLength])) {
$data[$patternhash][$tmpLength][] = $compressedPattern;
}
} else {
$data[$patternhash][$tmpLength][] = $pattern;
}
}
unset($matches);
// sorting of the data is important to check the patterns later in the correct order, because
// we need to check the most specific (=longest) patterns first, and the least specific
// (".*" for "Default Browser") last.
//
// sort by pattern start to group them
ksort($data);
// and then by pattern length (longest first)
foreach (array_keys($data) as $key) {
krsort($data[$key]);
}
// write optimized file (grouped by the first character of the has, generated from the pattern
// start) with multiple patterns joined by tabs. this is to speed up loading of the data (small
// array with pattern strings instead of an large array with single patterns) and also enables
// us to search for multiple patterns in one preg_match call for a fast first search
// (3-10 faster), followed by a detailed search for each single pattern.
$contents = [];
foreach ($data as $patternhash => $tmpEntries) {
if (empty($tmpEntries)) {
continue;
}
$subkey = SubKey::getPatternCacheSubkey($patternhash);
if (!isset($contents[$subkey])) {
$contents[$subkey] = [];
}
foreach ($tmpEntries as $tmpLength => $tmpPatterns) {
if (empty($tmpPatterns)) {
continue;
}
$chunks = array_chunk($tmpPatterns, self::COUNT_PATTERN);
foreach ($chunks as $chunk) {
$contents[$subkey][] = $patternhash . "\t" . $tmpLength . "\t" . implode("\t", $chunk);
}
}
}
unset($data);
$subkeys = SubKey::getAllPatternCacheSubkeys();
foreach ($contents as $subkey => $content) {
$subkey = (string) $subkey;
(yield [$subkey => $content]);
unset($subkeys[$subkey]);
}
foreach (array_keys($subkeys) as $subkey) {
$subkey = (string) $subkey;
(yield [$subkey => []]);
}
}
/**
*
*/
public function testPregQuote()
{
$expected = 'Mozilla\\/.\\.0 \\(compatible; Ask Jeeves\\/Teoma.*\\)';
self::assertSame($expected, $this->quoter->pregQuote('Mozilla/?.0 (compatible; Ask Jeeves/Teoma*)'));
}
/**
* Parses the ini data to get the version of loaded ini file
*
* @param string $iniString The loaded ini data
*
* @return int
*/
public function getIniVersion($iniString)
{
$quoterHelper = new Quoter();
$key = $quoterHelper->pregQuote(self::BROWSCAP_VERSION_KEY);
if (preg_match('/\\.*\\[' . $key . '\\][^\\[]*Version=(\\d+)\\D.*/', $iniString, $matches)) {
if (isset($matches[1])) {
$this->iniVersion = (int) $matches[1];
}
}
return $this->iniVersion;
}
