forked from koala-framework/koala-framework
/
Loader.php
184 lines (169 loc) · 6.33 KB
/
Loader.php
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<?php
class Kwf_Loader
{
private static $_includePath;
/**
* Set include path used for Kwf_Loader::isValidClass
*
* called exactly once in setup
*
* get_include_path is not used, because some external library might have changed that.
*
* @internal
*/
public static function setIncludePath($ip)
{
if (self::$_includePath) throw new Kwf_Exception("include path is already set");
self::$_includePath = $ip;
set_include_path($ip);
}
public static function registerAutoload()
{
if (!class_exists('Kwf_Benchmark', false)) require KWF_PATH.'/Kwf/Benchmark.php';
if (Kwf_Benchmark::isEnabled()) {
$class = 'Kwf_Loader_Benchmark';
if (!class_exists($class, false)) require KWF_PATH.'/Kwf/Loader/Benchmark.php';
} else {
//für performance
$class = 'Kwf_Loader';
}
spl_autoload_register(array($class, 'loadClass'));
}
/**
* @internal public for unit tests
*/
public static function _prepareNamespaces($composerNamespaces, $psr4Namespaces)
{
$namespaces = array();
foreach ($composerNamespaces as $namespace => $dirs) {
// convert paths to psr4 style
$namespacePath = str_replace('\\', DIRECTORY_SEPARATOR, $namespace);
$namespacePath = str_replace('_', DIRECTORY_SEPARATOR, $namespacePath);
if ($namespacePath[strlen($namespacePath)-1] == DIRECTORY_SEPARATOR) {
// Path must not end with /
$namespacePath = substr($namespacePath, 0, -1);
}
$preparedDirs = array();
foreach ($dirs as $dir) {
if ($dir[strlen($dir)-1] == DIRECTORY_SEPARATOR) {
$dir = substr($dir, 0, -1);
}
$preparedDirs[] = $dir.DIRECTORY_SEPARATOR.$namespacePath;
}
$namespaces[$namespace] = $preparedDirs;
if (strpos($namespace, '\\') === false && substr($namespace, -1) != '_') {
$namespaces[$namespace.'\\'] = $preparedDirs;
// Needed for special case like PHPExcel.
$namespaces[$namespace.'_'] = $preparedDirs;
}
}
foreach ($psr4Namespaces as $psr4Namespace => $dirs) {
$namespaces[$psr4Namespace] = $dirs;
}
//dirs must not end with / and have to include namespace-part
return $namespaces;
}
/**
* @internal public for unit tests
*/
public static function _findFile($class, $namespaces, $classMap)
{
if (isset($classMap[$class])) {
$file = $classMap[$class];
} else {
$ns3 = null;
if (($pos = strpos($class, '\\')) !== false) {
//php 5.3 namespace
$ns1 = substr($class, 0, $pos+1);
$pos = strpos($class, '\\', $pos+1);
if ($pos !== false) {
$ns2 = substr($class, 0, $pos+1);
} else {
$ns2 = $class;
}
$pos = strpos($class, '\\', $pos+1);
if ($pos !== false) {
$ns3 = substr($class, 0, $pos+1);
} else {
$ns3 = $class;
}
$file = str_replace('\\', DIRECTORY_SEPARATOR, $class);
} else {
$pos = strpos($class, '_');
$ns1 = substr($class, 0, $pos+1);
$pos = strpos($class, '_', $pos+1);
if ($pos !== false) {
$ns2 = substr($class, 0, $pos+1);
} else {
$ns2 = $class;
}
$file = str_replace('_', DIRECTORY_SEPARATOR, $class);
}
$dirs = false;
$matchingNamespace = '';
if ($ns3 && isset($namespaces[$ns3])) {
$dirs = $namespaces[$ns3];
$matchingNamespace = $ns3;
} else if (isset($namespaces[$ns2])) {
$dirs = $namespaces[$ns2];
$matchingNamespace = $ns2;
} else if (isset($namespaces[$ns1])) {
$dirs = $namespaces[$ns1];
$matchingNamespace = $ns1;
}
if ($dirs !== false) {
$file = substr($file, strlen($matchingNamespace));
if (count($dirs) == 1) {
// $file can be '' in case of PHPExcel, class PHPExcel
$file = $dirs[0].($file ? '/' : '').$file.'.php';
} else {
foreach ($dirs as $dir) {
if (file_exists($dir.($file ? '/' : '').$file.'.php')) {
$file = $dir.($file ? '/' : '').$file.'.php';
}
}
}
} else {
$file = $file.'.php';
}
}
return $file;
}
public static function loadClass($class)
{
static $namespaces;
if (!isset($namespaces)) {
$composerNamespaces = include VENDOR_PATH.'/composer/autoload_namespaces.php';
$psr4Namespaces = include VENDOR_PATH.'/composer/autoload_psr4.php';
$namespaces = self::_prepareNamespaces($composerNamespaces, $psr4Namespaces);
}
static $classMap;
if (!isset($classMap)) {
$classMap = include VENDOR_PATH.'/composer/autoload_classmap.php';
}
$file = self::_findFile($class, $namespaces, $classMap);
try {
include $file;
} catch (Exception $e) {
if ($fp = @fopen($file, 'r', true)) {
//if file exists re-throw exception
//(file_exists accepts unfortunately no use_include_path parameter)
fclose($fp);
throw $e;
}
}
}
/**
* Use this method to validate user input that should represent a valid class
*
* validate before triggering autoloader for security reasons
*/
public static function isValidClass($class)
{
if (preg_match('#[^a-z0-9_]#i', $class)) return false;
//don't look into other libs
if (preg_match('#^[a-z]+-lib#i', $class)) return false;
if (preg_match('#^lib#i', $class)) return false;
return class_exists($class);
}
}