<?php
error_reporting(E_ALL|E_STRICT);

function libxml_create_error(LibXMLError $error)
{
	$return = '<li><strong style="color:';
	switch ($error->level)
	{
		case LIBXML_ERR_WARNING:
			$return .= 'yellow;">Warning';
		break;
		case LIBXML_ERR_ERROR:
			$return .= 'orange;">Error';
		break;
		case LIBXML_ERR_FATAL:
			$return .= 'red;">Fatal Error';
		break;
	}
	$return .= '</strong> on line <strong>'.$error->line.'</strong>:'.PHP_EOL;
	return $return.trim($error->message).' <i>(#'.$error->code.')</i></li>'.PHP_EOL;
}

function libxml_display_errors()
{
	echo '<div class="box"><h2>XML Errors:</h2>';
	echo '<ol>';
	foreach (libxml_get_errors() as $error)
		print libxml_create_error($error);
	echo '</ol></div>';
	libxml_clear_errors();
}

libxml_use_internal_errors(true); // Enable user error handling

abstract class Upload
{
	protected $file = array();
	protected $infos = array();

	public function __construct(Array $file)
	{
		if(isset($file))
		{
			if ($file["error"] > 0)
				$this->info('<span style="color:red;">Error: '.$file["error"].'</span>');
			elseif($file["size"] > 1024 * 1024) // 1 MB
				$this->info('<span style="color:red;">Your file exceeds maximum filesize of 1 MB.</span>');
			else
				$this->file = $file;
		}
	}

	abstract public function save();

	protected function info($str)
	{
		$this->infos[] = $str;
	}

	protected function getInfos()
	{
		return $this->infos;
	}

	public function printInfos()
	{
		echo '<div class="box"><h2>Information:</h2>';
		echo '<ul>';
		foreach($this->infos as $info)
			echo '<li>'.$info.'</li>';
		echo '</ul></div>';
	}

	protected function backup($source)
	{
		if(is_file($source))
		{
			$backupdir = preg_replace('#(\/)*$#', '', dirname($_SERVER['SCRIPT_FILENAME'])).'/backup/';
			if(!is_dir($backupdir))
			{
				if(!mkdir($backupdir))
					return false;
				chmod($backupdir, 0777);
			}
			$backupfile = $backupdir.$this->file['name'].'-'.date('Ymd-Gis').'.bak';
			if(copy($source, $backupfile))
			{
				chmod($backupfile, 0777);
				$this->info('<span style="color:green;">Old "'. $source . '" was backuped</span>');
				return true;
			}
			else
				$this->info('<span style="color:red;">Failed to backup ' . $source . '</span>');
		}
		else
			$this->info('<span style="color:red;">Source ' . $source . ' does not exist.</span>');
		return false;
	}
}


abstract class XMLUpload extends Upload
{
	protected $schemalocation;

	protected function validate()
	{
		if($this->file["type"] != 'text/xml')
		{
			echo '<span style="color:red;">You did not submit an XML file.</span>';
			return false;
		}
		else
		{
			$xml = $this->file["tmp_name"];
			$dom = new DomDocument();
			$dom->load($xml);
			// Autoload schema
			//$schema = $dom->documentElement->getAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'noNamespaceSchemaLocation');
			return @$dom->schemaValidate($this->schemalocation);
		}
	}
}

class FilesystemXMLUpload extends XMLUpload
{
	protected $schemalocation  = '../xmlfs1.0/schema.xsd';

	public function save()
	{
		$valid = $this->validate();
		$this->info($this->file["name"] . ' <strong style="color:' . ($valid ? 'green;">is' : 'red;">is not') . '</strong> valid.');
		if($valid)
		{
			$uri = preg_replace('#(\\'.DIRECTORY_SEPARATOR.')*$#', '', $_SERVER['DOCUMENT_ROOT']).DIRECTORY_SEPARATOR.$this->file["name"];
			if($this->backup($uri) && move_uploaded_file($this->file["tmp_name"], $uri)) {
				$this->info('New file was uploaded.');
				return true;
			}
			else
				$this->info('An <span style="color:red;">error</span> occured while moving file.');
		}
		else
			$this->info('Nothing was saved. Please improve your file first.');
		if(!$valid)
			libxml_display_errors();
		return false;
	}
}

class TranslationXMLUpload extends XMLUpload
{
	protected $schemalocation = '../translation1.0/schema.xsd';
	public function save()
	{
		$valid = $this->validate();
		$this->info($this->file["name"] . ' <strong style="color:' . ($valid ? 'green;">is' : 'red;">is not') . '</strong> valid.');
		if($valid)
		{
			$uri = preg_replace('#(\\'.DIRECTORY_SEPARATOR.')*$#', '', $_SERVER['DOCUMENT_ROOT']).DIRECTORY_SEPARATOR.'mocovi'.DIRECTORY_SEPARATOR.'translations'.DIRECTORY_SEPARATOR.$this->file["name"];
			die($uri);
			if($this->backup($uri) && move_uploaded_file($this->file["tmp_name"], $uri))
			{
				$this->info('New file was uploaded.');
				return true;
			}
			else
				$this->info('An <span style="color:red;">error</span> occured while moving file.');
		}
		else
			$this->info('Nothing was saved. Please improve your file first.');

		if(!$valid)
			libxml_display_errors();
		return false;
	}
}