freenetis-github/application/vendors/phpax-rs/common/PathUtil.php @ 74a7dbca
| 74a7dbca | Michal Kliment | <?php
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/*
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* This file is a part of PHPAX-RS framework, released under terms of GPL-3.0
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* licence. Copyright (c) 2014, UnArt Slavičín, o.s. All rights reserved.
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*/
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namespace phpaxrs\common;
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use \InvalidArgumentException;
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/**
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* The "PathUtil" class that provides tools for working with URL paths.
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*
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* @author Ondřej Fibich <ondrej.fibich@gmail.com>
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*/
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class PathUtil {
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/**
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* Checks validity of given URL path.
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*
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* @param string $path
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* @return bool
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*/
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public static function is_valid($path) {
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return preg_match('/^(\/[a-zA-Z0-9_\-.]*)+$/', $path) == 1;
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}
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/**
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* Checks validity of given URL path template.
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*
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* @param string $template
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* @return bool
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*/
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public static function is_valid_template($template) {
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$regex = '/^(\/([a-zA-Z0-9_\-.]|\{[a-zA-Z]+(:[^}.]+)?\})*)+$/';
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return preg_match($regex, $template) == 1;
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}
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/**
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* Normalizes path which means that it adds "/" to the start or to the end
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* of path if the are missing.
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*
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* @param string $path Path to be nomalized
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* @return string normalized path
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*/
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public static function normalize($path) {
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return '/' . ltrim(rtrim($path, '/') . '/', '/');
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}
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/**
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* Gets relative path from absolute path by removing path prefix that is
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* given.
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*
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* @param string $prefix_path
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* @param string $absolute_path
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* @return null|string null if absolute path does not start with prefix
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* relative path otherwise
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*/
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public static function relative($prefix_path, $absolute_path) {
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$prefix_path = self::normalize($prefix_path);
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$na_path = self::normalize($absolute_path);
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if (strncmp($na_path, $prefix_path, mb_strlen($prefix_path)) != 0) {
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return NULL;
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}
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return self::normalize(substr($na_path, mb_strlen($prefix_path)));
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}
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/**
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* Tries to match path template agains a path and gets attributes values
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* from path. Path template is a path string that may contain arguments that
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* are denoted by {argumentName}.
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*
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* @example path "/abs/23/34-a" will be matched agains template
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* "/abs/{id}/{sid}-a" and arguments array('23', '34') will
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* be retrieved
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*
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* @param string $path_template path teplate that may contain arguments
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* @param string $path real path that will be matched agains template
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* @param array $args reference for passing arguments from path using template
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* @return bool|array FALSE on no match otherwise array of gained arguments
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* @throws InvalidArgumentException on invalid path template
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*/
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public static function match($path_template, $path) {
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// check input
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if (!self::is_valid($path)) {
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throw new InvalidArgumentException('invalid path passed');
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}
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if (!self::is_valid_template($path_template)) {
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throw new InvalidArgumentException('invalid path template');
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}
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// normalize paths
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$path = self::normalize($path);
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$path_template = self::normalize($path_template);
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// replace / . and arguments in path teplate and transform them
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// for their usage in regex (order of patterns is important!)
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$transformations = array(
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'/\{[a-zA-Z]+:([^}]+)\}/' => '($1)', // 1: arguments with regex
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'/{[^}]+}/' => '([^\/]+)', // 2: simple arguments
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'/[.]/' => '[.]' // 3: dot in path
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);
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$path_regex = preg_replace(array_keys($transformations),
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array_values($transformations), $path_template);
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if ($path_regex === NULL) {
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throw new InvalidArgumentException('invalid @Path arg.');
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}
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// wrap regex with delimiters | that is not present in URL
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$path_regex = '|^' . $path_regex . '$|';
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// check path
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$args = array();
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if (($rm = preg_match($path_regex, $path, $args)) === FALSE) {
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throw new InvalidArgumentException('invalid @Path arg.');
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}
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// matched?
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if ($rm > 0) {
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if (empty($args) || !count($args)) {
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return array();
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}
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// shift matched string
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array_shift($args);
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return $args;
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}
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// no match
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return FALSE;
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}
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}
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