<?php

class filehandling
{
	public static function folderHasToExist($folder, $mask=0775)
	{
		if (!is_dir($folder)) {
			mkdir($folder, $mask, true);
		}
	}

	public static function getDirectories($path, &$directories) {
		if (is_dir($path))
			if ($dh = opendir($path)) {
				$i=0;
				while (($dir = readdir($dh)) !== false) {
					if (filetype($path . $dir) == "dir" && $dir != "." && $dir != "..") {
						$directories[$i] = $dir;
						$i++;
					}
				}
				closedir($dh);

				return true;
			}

		return false;
	}

	public static function getExtension($filename)
	{
		return strtolower(substr(strrchr($filename, '.'), 1));
	}
	
	public static function getFiles($path, &$files) {
		if (is_dir($path))
			if ($dh = opendir($path)) {
				$i=0;
				while (($file = readdir($dh)) !== false) {
					if (filetype($path . $file) == "file" && filehandling::checkExt($file)) {
						$files[$i] = $file;
						$i++;
					}
				}
				closedir($dh);

				return true;
			}

		return false;
	}

	public static function scanDirectory($dir) {

		$FileHandling = new classFileHandling;

		if ($dh = opendir($dir)) {
			while (($file = readdir($dh)) !== false) {
				if (filetype($dir . $file) == "dir" && $file != "." && $file != "..") {
					$dirs[] = $dir . $file . '/';
					$sub_dirs = $this->ScanDirectory($dir . $file . '/');
					if (!empty($sub_dirs))
						foreach ($sub_dirs as $sub_dir)
							$dirs[] = $sub_dir;
				}
			}
			closedir($dh);
		}

		return $dirs;
	}

	public static function getParentDir($dir) {        // GetParentDir('/a/b/c/') = '/a/b/'
		if (!strpos(rtrim($dir, '/'), '/')) return "";
		$path_string = substr($dir, 0, -(strlen(ltrim(strrchr(rtrim($dir, '/'), '/'), '/'))+1));
		if (empty($path_string))
			return '/';
		else
			return $path_string;
	}

	public static function getUnusedFileName($filename)
	{
		if (is_file($filename)) {
			$new_filename = $filename;
			for ($i=2; is_file($new_filename); $i++) {
				$ext = self::getExtension($filename);
				
				if (!empty($ext)) {
					$new_filename = substr($filename, 0, strlen($filename)-strlen($ext)-1) . '-' . $i . '.' . $ext;
				} else {
					$new_filename = $filename . '-' . $i;
				}
			}
			$filename = $new_filename;
		}
		return $filename;
	}
	
	public static function stripWeirdCharacters($filename)
	{
		return preg_replace('/[^A-Za-z0-9\.\/\-\_\+\%]/', '', 
			preg_replace('/ /', '-', $filename));
	}
	
	public static function unzip($src_file, $dest_dir, $createSubfolders=true, $overwrite=false)
	{
		ini_set('memory_limit','128M'); // Mem. req
	
		if(!is_resource(zip_open($src_file)))
		{
		  $src_file=dirname($_SERVER['SCRIPT_FILENAME'])."/".$src_file;
		}
		
		if (is_resource($zip = zip_open($src_file)))
		{         
		  // For every file in the zip-packet
		  while ($zip_entry = zip_read($zip))
		  {          
			// Open the entry
			if (zip_entry_open($zip,$zip_entry,"r"))
			{
			
				// The name of the file to save on the disk
				$file_name = $dest_dir.zip_entry_name($zip_entry);
				
				if (!$overwrite)
					$file_name = self::getUnusedFileName($file_name);

				// Get the content of the zip entry
				$fstream = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
				
				if (!file_exists($file_name) && $file_name[strlen($file_name)-1]=='/' && $createSubfolders)
					mkdir($file_name);
				
				if(!is_dir($file_name))           
					file_put_contents($file_name, $fstream );
			
			  // Close the entry
			  zip_entry_close($zip_entry);
			}     
		  }
		  // Close the zip-file
		  zip_close($zip);
		}
		else
		{
			//echo "No Zip Archive Found.";
			return false;
		}

		return true;
	}
	
	public static public function checkExt($filename)
	{
		return (strtolower(substr($filename, -4)) == '.jpg');
	}

}