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<?php
/**
* @package     FrameworkOnFramework
* @subpackage  platform
 * @copyright   Copyright (C) 2010 - 2015 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license     GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;

abstract class FOFPlatformFilesystem implements FOFPlatformFilesystemInterface
{
    /**
     * The list of paths where platform class files will be looked for
     *
     * @var  array
     */
    protected static $paths = array();

    /**
     * This method will crawl a starting directory and get all the valid files that will be analyzed by getInstance.
     * Then it organizes them into an associative array.
     *
     * @param   string  $path               Folder where we should start looking
     * @param   array   $ignoreFolders      Folder ignore list
     * @param   array   $ignoreFiles        File ignore list
     *
     * @return  array   Associative array, where the `fullpath` key contains the path to the file,
     *                  and the `classname` key contains the name of the class
     */
    protected static function getFiles($path, array $ignoreFolders = array(), array $ignoreFiles = array())
    {
        $return = array();

        $files  = self::scanDirectory($path, $ignoreFolders, $ignoreFiles);

        // Ok, I got the files, now I have to organize them
        foreach($files as $file)
        {
            $clean = str_replace($path, '', $file);
            $clean = trim(str_replace('\\', '/', $clean), '/');

            $parts = explode('/', $clean);

            // If I have less than 3 fragments, it means that the file was inside the generic folder
            // (interface + abstract) so I have to skip it
            if(count($parts) < 3)
            {
                continue;
            }

            $return[] = array(
                'fullpath'  => $file,
                'classname' => 'FOFPlatform'.ucfirst($parts[0]).ucfirst(basename($parts[1], '.php'))
            );
        }

        return $return;
    }

    /**
     * Recursive function that will scan every directory unless it's in the ignore list. Files that aren't in the
     * ignore list are returned.
     *
     * @param   string  $path               Folder where we should start looking
     * @param   array   $ignoreFolders      Folder ignore list
     * @param   array   $ignoreFiles        File ignore list
     *
     * @return  array   List of all the files
     */
    protected static function scanDirectory($path, array $ignoreFolders = array(), array $ignoreFiles = array())
    {
        $return = array();

        $handle = @opendir($path);

        if(!$handle)
        {
            return $return;
        }

        while (($file = readdir($handle)) !== false)
        {
            if($file == '.' || $file == '..')
            {
                continue;
            }

            $fullpath = $path . '/' . $file;

            if((is_dir($fullpath) && in_array($file, $ignoreFolders)) || (is_file($fullpath) && in_array($file, $ignoreFiles)))
            {
                continue;
            }

            if(is_dir($fullpath))
            {
                $return = array_merge(self::scanDirectory($fullpath, $ignoreFolders, $ignoreFiles), $return);
            }
            else
            {
                $return[] = $path . '/' . $file;
            }
        }

        return $return;
    }

    /**
     * Gets the extension of a file name
     *
     * @param   string  $file  The file name
     *
     * @return  string  The file extension
     */
    public function getExt($file)
    {
        $dot = strrpos($file, '.') + 1;

        return substr($file, $dot);
    }

    /**
     * Strips the last extension off of a file name
     *
     * @param   string  $file  The file name
     *
     * @return  string  The file name without the extension
     */
    public function stripExt($file)
    {
        return preg_replace('#\.[^.]*$#', '', $file);
    }
}