Viewing file:  AliasLoader.php (5.03 KB) -rw-r--r--
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<?php
namespace Illuminate\Foundation;
class AliasLoader
{
/**
* The array of class aliases.
*
* @var array
*/
protected $aliases;
/**
* Indicates if a loader has been registered.
*
* @var bool
*/
protected $registered = false;
/**
* The namespace for all real-time facades.
*
* @var string
*/
protected static $facadeNamespace = 'Facades\\';
/**
* The singleton instance of the loader.
*
* @var \Illuminate\Foundation\AliasLoader
*/
protected static $instance;
/**
* Create a new AliasLoader instance.
*
* @param array $aliases
* @return void
*/
private function __construct($aliases)
{
$this->aliases = $aliases;
}
/**
* Get or create the singleton alias loader instance.
*
* @param array $aliases
* @return \Illuminate\Foundation\AliasLoader
*/
public static function getInstance(array $aliases = [])
{
if (is_null(static::$instance)) {
return static::$instance = new static($aliases);
}
$aliases = array_merge(static::$instance->getAliases(), $aliases);
static::$instance->setAliases($aliases);
return static::$instance;
}
/**
* Load a class alias if it is registered.
*
* @param string $alias
* @return bool|null
*/
public function load($alias)
{
if (static::$facadeNamespace && strpos($alias, static::$facadeNamespace) === 0) {
$this->loadFacade($alias);
return true;
}
if (isset($this->aliases[$alias])) {
return class_alias($this->aliases[$alias], $alias);
}
}
/**
* Load a real-time facade for the given alias.
*
* @param string $alias
* @return void
*/
protected function loadFacade($alias)
{
require $this->ensureFacadeExists($alias);
}
/**
* Ensure that the given alias has an existing real-time facade class.
*
* @param string $alias
* @return string
*/
protected function ensureFacadeExists($alias)
{
if (is_file($path = storage_path('framework/cache/facade-'.sha1($alias).'.php'))) {
return $path;
}
file_put_contents($path, $this->formatFacadeStub(
$alias, file_get_contents(__DIR__.'/stubs/facade.stub')
));
return $path;
}
/**
* Format the facade stub with the proper namespace and class.
*
* @param string $alias
* @param string $stub
* @return string
*/
protected function formatFacadeStub($alias, $stub)
{
$replacements = [
str_replace('/', '\\', dirname(str_replace('\\', '/', $alias))),
class_basename($alias),
substr($alias, strlen(static::$facadeNamespace)),
];
return str_replace(
['DummyNamespace', 'DummyClass', 'DummyTarget'], $replacements, $stub
);
}
/**
* Add an alias to the loader.
*
* @param string $alias
* @param string $class
* @return void
*/
public function alias($alias, $class)
{
$this->aliases[$alias] = $class;
}
/**
* Register the loader on the auto-loader stack.
*
* @return void
*/
public function register()
{
if (! $this->registered) {
$this->prependToLoaderStack();
$this->registered = true;
}
}
/**
* Prepend the load method to the auto-loader stack.
*
* @return void
*/
protected function prependToLoaderStack()
{
spl_autoload_register([$this, 'load'], true, true);
}
/**
* Get the registered aliases.
*
* @return array
*/
public function getAliases()
{
return $this->aliases;
}
/**
* Set the registered aliases.
*
* @param array $aliases
* @return void
*/
public function setAliases(array $aliases)
{
$this->aliases = $aliases;
}
/**
* Indicates if the loader has been registered.
*
* @return bool
*/
public function isRegistered()
{
return $this->registered;
}
/**
* Set the "registered" state of the loader.
*
* @param bool $value
* @return void
*/
public function setRegistered($value)
{
$this->registered = $value;
}
/**
* Set the real-time facade namespace.
*
* @param string $namespace
* @return void
*/
public static function setFacadeNamespace($namespace)
{
static::$facadeNamespace = rtrim($namespace, '\\').'\\';
}
/**
* Set the value of the singleton alias loader.
*
* @param \Illuminate\Foundation\AliasLoader $loader
* @return void
*/
public static function setInstance($loader)
{
static::$instance = $loader;
}
/**
* Clone method.
*
* @return void
*/
private function __clone()
{
//
}
}
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