<?php

/**
 * Validates ftp (File Transfer Protocol) URIs as defined by generic RFC 1738.
 */
class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
	/**
	 * @type int
	 */
	public $default_port = 21;
	
	/**
	 * @type bool
	 */
	public $browsable = true; // usually
	
	/**
	 * @type bool
	 */
	public $hierarchical = true;
	
	/**
	 *
	 * @param HTMLPurifier_URI $uri        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return bool
	 */
	public function doValidate(&$uri, $config, $context) {
		$uri->query = null;
		
		// typecode check
		$semicolon_pos = strrpos ( $uri->path, ';' ); // reverse
		if ($semicolon_pos !== false) {
			$type = substr ( $uri->path, $semicolon_pos + 1 ); // no semicolon
			$uri->path = substr ( $uri->path, 0, $semicolon_pos );
			$type_ret = '';
			if (strpos ( $type, '=' ) !== false) {
				// figure out whether or not the declaration is correct
				list ( $key, $typecode ) = explode ( '=', $type, 2 );
				if ($key !== 'type') {
					// invalid key, tack it back on encoded
					$uri->path .= '%3B' . $type;
				} elseif ($typecode === 'a' || $typecode === 'i' || $typecode === 'd') {
					$type_ret = ";type=$typecode";
				}
			} else {
				$uri->path .= '%3B' . $type;
			}
			$uri->path = str_replace ( ';', '%3B', $uri->path );
			$uri->path .= $type_ret;
		}
		return true;
	}
}

// vim: et sw=4 sts=4