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<?php
namespace MPHBR;
class Autoloader {
/**
*
* @var string
*/
private $prefix;
/**
*
* @var int
*/
private $prefixLength;
/**
*
* @var string
*/
private $basePath;
/**
*
* @var string
*/
private $classDirSeparator;
private $customPathList = array();
/**
*
* @param string $prefix Class prefix.
* @param string $basePath Path to classes directory.
*/
public function __construct( $prefix, $basePath ) {
$this->prefix = $prefix;
$this->prefixLength = strlen( $this->prefix );
$this->basePath = $basePath;
$this->classDirSeparator = '\\'; // namespaces
$this->setupCustomPathList();
spl_autoload_register( array( $this, 'autoload' ) );
}
private function setupCustomPathList() {
$this->customPathList['Libraries\\EDD_Plugin_Updater\\EDD_Plugin_Updater'] = 'libraries/edd-plugin-updater/edd-plugin-updater.php';
}
/**
*
* @param string $class
*
* @return string|boolean filepath or false
*/
public function autoload( $class ) {
$class = ltrim( $class, '\\' );
// does the class use the namespace prefix?
if ( strncmp( $this->prefix, $class, $this->prefixLength ) !== 0 ) {
// no, move to the next registered autoloader
return false;
}
$relativeClass = substr( $class, $this->prefixLength );
// replace the namespace prefix with the base directory, replace namespace
// separators with directory separators in the relative class name, append
// with .php
$file = $this->basePath . $this->convertClassToPath( $relativeClass );
// if the file exists, require it
if ( file_exists( $file ) ) {
require_once $file;
return $file;
}
return false;
}
/**
*
* @param string $class
*
* @return string Relative path to classfile.
*/
private function convertClassToPath( $class ) {
$path = '';
if ( array_key_exists( $class, $this->customPathList ) ) {
$path = $this->customPathList[ $class ];
} else {
$path = $this->defaultConvert( $class );
}
return $path;
}
private function defaultConvert( $class ) {
$filePath = $this->convertToFilePath( $class );
$filePath = $this->lowerCamelCase( $filePath );
$filePath = $this->replaceUnderscores( $filePath );
return $filePath;
}
private function replaceUnderscores( $path ) {
return str_replace( '_', '-', $path );
}
private function lowerCamelCase( $class ) {
$class = preg_replace( '/([a-z])([A-Z])/', '$1-$2', $class );
$class = preg_replace( '/([A-Z])([A-Z][a-z])/', '$1-$2', $class );
$class = strtolower( $class );
return $class;
}
private function convertToFilePath( $class ) {
$classFile = str_replace( $this->classDirSeparator, DIRECTORY_SEPARATOR, $class );
$classFile = $classFile . '.php';
return $classFile;
}
}