HexMakina / kadro

PSR4Autoloader.class.php

<?php
namespace HexMakina\kadro;

use \HexMakina\LocalFS\FileSystem;

The type HexMakina\LocalFS\FileSystem was not found. Maybe you did not declare it correctly or list all dependencies?

class PSR4Autoloader
{
  
  /**
  * An associative array where the key is a namespace prefix and the value
  * is an array of base directories for classes in that namespace.
  *
  * @var array
  */
  protected $prefixes = [];

  /**
  * Register loader with SPL autoloader stack.
  *
  * @return void
  */

  public function register()
  {
    spl_autoload_register(array($this, 'loadClass'));
  }

  /**
  * Adds a base directory for a namespace prefix.
  *
  * @param string $prefix The namespace prefix.
  * @param string $base_dir A base directory for class files in the
  * namespace.
  * @param bool $prepend If true, prepend the base directory to the stack
  * instead of appending it; this causes it to be searched first rather
  * than last.
  * @return void
  */
  public function addNamespaceTree($base_dir, $prepend = false)

The parameter $prepend is not used and could be removed.

  {
  	$dir_content = FileSystem::preg_scandir($base_dir, '/^[A-Z]{1}[A-Za-z]+(?!\.class.\.php)$/');
    
  	foreach($dir_content as $res)
  	{
  		if(is_dir($fullpath = $base_dir.'/'.$res))
  		{
  			$this->addNamespace('HexMakina\kadro\\'.$res, $fullpath);
        $this->addNamespaceTree($fullpath);
  		}
  	}
  }
  
  public function addNamespace($prefix, $base_dir, $prepend = false)
  {
    
    // normalize namespace prefix
    $prefix = trim($prefix, '\\') . '\\';

    // normalize the base directory with a trailing separator
    $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';

    // initialize the namespace prefix array
    if (isset($this->prefixes[$prefix]) === false) {
    $this->prefixes[$prefix] = array();
    }

    // retain the base directory for the namespace prefix
    if ($prepend) {
      array_unshift($this->prefixes[$prefix], $base_dir);
    } else {
      array_push($this->prefixes[$prefix], $base_dir);
    }
  }

  /**
  * Loads the class file for a given class name.
  *
  * @param string $class The fully-qualified class name.
  * @return mixed The mapped file name on success, or boolean false on
  * failure.
  */
  public function loadClass($class)
  {
    // var_dump(__FUNCTION__."($class)");

    // the current namespace prefix
    $prefix = $class;
    // work backwards through the namespace names of the fully-qualified
    // class name to find a mapped file name
    while (false !== $pos = strrpos($prefix, '\\')) 
    {
      // retain the trailing namespace separator in the prefix
      $prefix = substr($class, 0, $pos + 1);
      // var_dump("prefix: $prefix");
      // the rest is the relative class name
      $relative_class = substr($class, $pos + 1);
      // try to load a mapped file for the prefix and relative class
      
      $mapped_file = $this->loadMappedFile($prefix, $relative_class);
      if ($mapped_file) {
        return $mapped_file;
      }

      // remove the trailing namespace separator for the next iteration
      // of strrpos()
      $prefix = rtrim($prefix, '\\');
    }
    // never found a mapped file
    return false;
  }

  /**
  * Load the mapped file for a namespace prefix and relative class.
  *
  * @param string $prefix The namespace prefix.
  * @param string $relative_class The relative class name.
  * @return mixed Boolean false if no mapped file can be loaded, or the
  * name of the mapped file that was loaded.
  */
  protected function loadMappedFile($prefix, $relative_class)
  {
    // are there any base directories for this namespace prefix?
    if (isset($this->prefixes[$prefix]) === false) {
      return false;
    }
    
    // look through base directories for this namespace prefix
    foreach ($this->prefixes[$prefix] as $base_dir) 
    {
      // replace the namespace prefix with the base directory,
      // replace namespace separators with directory separators
      // in the relative class name, append with .php
      $file = $base_dir
      . str_replace('\\', '/', $relative_class)
      . '.class.php';

      // if the mapped file exists, require it
      if ($this->requireFile($file))
      {// yes, we're done
        // var_dump(__FUNCTION__." SUCCESS requireFile($file)");
        return $file;
      }
    }
    
    // never found it
    return false;
  }

  /**
  * If a file exists, require it from the file system.
  *
  * @param string $file The file to require.
  * @return bool True if the file exists, false if not.
  */
  protected function requireFile($file)
  {
    // var_dump(__FUNCTION__."($file)");
    if (file_exists($file)) {
      require_once $file;
      return true;
    }
    return false;
  }
}