forked from GNUsocial/gnu-social
430 lines
13 KiB
PHP
430 lines
13 KiB
PHP
<?php
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/**
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* URL parser and mapper
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*
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* PHP version 5
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*
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* LICENSE:
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*
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* Copyright (c) 2006, Bertrand Mansion <golgote@mamasam.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @category Net
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* @package Net_URL_Mapper
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* @author Bertrand Mansion <golgote@mamasam.com>
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* @license http://opensource.org/licenses/bsd-license.php New BSD License
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* @version CVS: $Id: Path.php,v 1.1 2007/03/28 10:23:04 mansion Exp $
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* @link http://pear.php.net/package/Net_URL_Mapper
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*/
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require_once 'Net/URL.php';
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require_once 'Net/URL/Mapper/Part/Dynamic.php';
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require_once 'Net/URL/Mapper/Part/Wildcard.php';
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require_once 'Net/URL/Mapper/Part/Fixed.php';
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class Net_URL_Mapper_Path
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{
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private $path = '';
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private $N = 0;
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public $token;
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public $value;
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private $line = 1;
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private $state = 1;
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protected $alias;
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protected $rules = array();
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protected $defaults = array();
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protected $parts = array();
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protected $rule;
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protected $format;
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protected $minKeys;
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protected $maxKeys;
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protected $fixed = true;
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protected $required;
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public function __construct($path = '', $defaults = array(), $rules = array())
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{
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$this->path = '/'.trim(Net_URL::resolvePath($path), '/');
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$this->setDefaults($defaults);
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$this->setRules($rules);
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try {
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$this->parsePath();
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} catch (Exception $e) {
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// The path could not be parsed correctly, treat it as fixed
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$this->fixed = true;
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$part = self::createPart(Net_URL_Mapper_Part::FIXED, $this->path, $this->path);
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$this->parts = array($part);
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}
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$this->getRequired();
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}
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public function getPath()
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{
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return $this->path;
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}
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protected function parsePath()
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{
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while ($this->yylex()) { }
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}
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/**
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* Get the path alias
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* Path aliases can be used instead of full path
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* @return null|string
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*/
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public function getAlias()
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{
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return $this->alias;
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}
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/**
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* Set the path name
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* @param string Set the path name
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* @see getAlias()
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*/
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public function setAlias($alias)
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{
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$this->alias = $alias;
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return $this;
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}
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/**
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* Get the path parts default values
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* @return null|array
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*/
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public function getDefaults()
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{
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return $this->defaults;
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}
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/**
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* Set the path parts default values
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* @param array Associative array with format partname => value
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*/
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public function setDefaults($defaults)
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{
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if (is_array($defaults)) {
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$this->defaults = $defaults;
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} else {
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$this->defaults = array();
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}
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}
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/**
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* Set the path parts default values
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* @param array Associative array with format partname => value
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*/
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public function setRules($rules)
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{
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if (is_array($rules)) {
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$this->rules = $rules;
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} else {
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$this->rules = array();
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}
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}
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/**
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* Returns the regular expression used to match this path
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* @return string PERL Regular expression
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*/
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public function getRule()
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{
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if (is_null($this->rule)) {
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$this->rule = '/^';
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foreach ($this->parts as $path => $part) {
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$this->rule .= $part->getRule();
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}
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$this->rule .= '$/';
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}
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return $this->rule;
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}
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public function getFormat()
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{
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if (is_null($this->format)) {
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$this->format = '/^';
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foreach ($this->parts as $path => $part) {
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$this->format .= $part->getFormat();
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}
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$this->format .= '$/';
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}
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return $this->format;
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}
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protected function addPart($part)
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{
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if (array_key_exists($part->content, $this->defaults)) {
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$part->setRequired(false);
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$part->setDefaults($this->defaults[$part->content]);
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}
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if (isset($this->rules[$part->content])) {
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$part->setRule($this->rules[$part->content]);
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}
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$this->rule = null;
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if ($part->getType() != Net_URL_Mapper_Part::FIXED) {
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$this->fixed = false;
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$this->parts[$part->content] = $part;
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} else {
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$this->parts[] = $part;
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}
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return $part;
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}
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public static function createPart($type, $content, $path)
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{
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switch ($type) {
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case Net_URL_Mapper_Part::DYNAMIC:
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return new Net_URL_Mapper_Part_Dynamic($content, $path);
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break;
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case Net_URL_Mapper_Part::WILDCARD:
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return new Net_URL_Mapper_Part_Wildcard($content, $path);
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break;
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default:
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return new Net_URL_Mapper_Part_Fixed($content, $path);
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}
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}
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/**
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* Checks whether the path contains the given part by name
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* If value parameter is given, the part also checks if the
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* given value conforms to the part rule.
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* @param string Part name
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* @param mixed The value to check against
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*/
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public function hasKey($partName, $value = null)
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{
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if (array_key_exists($partName, $this->parts)) {
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if (!is_null($value) && $value !== false) {
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return $this->parts[$partName]->match($value);
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} else {
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return true;
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}
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} elseif (array_key_exists($partName, $this->defaults) &&
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$value == $this->defaults[$partName]) {
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return true;
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}
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return false;
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}
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public function generate($values = array(), $qstring = array(), $anchor = '')
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{
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$path = '';
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foreach ($this->parts as $part) {
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$path .= $part->generate($values);
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}
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$path = '/'.trim(Net_URL::resolvePath($path), '/');
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if (!empty($qstring)) {
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$path .= '?'.http_build_query($qstring);
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}
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if (!empty($anchor)) {
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$path .= '#'.ltrim($anchor, '#');
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}
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return $path;
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}
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public function getRequired()
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{
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if (!isset($this->required)) {
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$req = array();
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foreach ($this->parts as $part) {
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if ($part->isRequired()) {
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$req[] = $part->content;
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}
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}
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$this->required = $req;
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}
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return $this->required;
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}
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public function getMaxKeys()
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{
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if (is_null($this->maxKeys)) {
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$this->maxKeys = count($this->required);
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$this->maxKeys += count($this->defaults);
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}
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return $this->maxKeys;
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}
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private $_yy_state = 1;
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private $_yy_stack = array();
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function yylex()
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{
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return $this->{'yylex' . $this->_yy_state}();
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}
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function yypushstate($state)
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{
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array_push($this->_yy_stack, $this->_yy_state);
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$this->_yy_state = $state;
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}
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function yypopstate()
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{
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$this->_yy_state = array_pop($this->_yy_stack);
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}
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function yybegin($state)
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{
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$this->_yy_state = $state;
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}
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function yylex1()
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{
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$tokenMap = array (
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1 => 1,
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3 => 1,
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5 => 1,
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7 => 1,
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9 => 1,
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);
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if ($this->N >= strlen($this->path)) {
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return false; // end of input
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}
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$yy_global_pattern = "/^(\/?:\/?\\(([a-zA-Z0-9_]+)\\))|^(\/?\\*\/?\\(([a-zA-Z0-9_]+)\\))|^(\/?:([a-zA-Z0-9_]+))|^(\/?\\*([a-zA-Z0-9_]+))|^(\/?([^\/:*]+))/";
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do {
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if (preg_match($yy_global_pattern, substr($this->path, $this->N), $yymatches)) {
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$yysubmatches = $yymatches;
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$yymatches = array_filter($yymatches, 'strlen'); // remove empty sub-patterns
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if (!count($yymatches)) {
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throw new Exception('Error: lexing failed because a rule matched' .
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'an empty string. Input "' . substr($this->path,
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$this->N, 5) . '... state START');
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}
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next($yymatches); // skip global match
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$this->token = key($yymatches); // token number
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if ($tokenMap[$this->token]) {
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// extract sub-patterns for passing to lex function
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$yysubmatches = array_slice($yysubmatches, $this->token + 1,
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$tokenMap[$this->token]);
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} else {
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$yysubmatches = array();
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}
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$this->value = current($yymatches); // token value
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$r = $this->{'yy_r1_' . $this->token}($yysubmatches);
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if ($r === null) {
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$this->N += strlen($this->value);
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$this->line += substr_count("\n", $this->value);
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// accept this token
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return true;
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} elseif ($r === true) {
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// we have changed state
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// process this token in the new state
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return $this->yylex();
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} elseif ($r === false) {
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$this->N += strlen($this->value);
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$this->line += substr_count("\n", $this->value);
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if ($this->N >= strlen($this->path)) {
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return false; // end of input
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}
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// skip this token
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continue;
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} else { $yy_yymore_patterns = array(
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1 => "^(\/?\\*\/?\\(([a-zA-Z0-9_]+)\\))|^(\/?:([a-zA-Z0-9_]+))|^(\/?\\*([a-zA-Z0-9_]+))|^(\/?([^\/:*]+))",
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3 => "^(\/?:([a-zA-Z0-9_]+))|^(\/?\\*([a-zA-Z0-9_]+))|^(\/?([^\/:*]+))",
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5 => "^(\/?\\*([a-zA-Z0-9_]+))|^(\/?([^\/:*]+))",
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7 => "^(\/?([^\/:*]+))",
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9 => "",
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);
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// yymore is needed
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do {
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if (!strlen($yy_yymore_patterns[$this->token])) {
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throw new Exception('cannot do yymore for the last token');
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}
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if (preg_match($yy_yymore_patterns[$this->token],
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substr($this->path, $this->N), $yymatches)) {
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$yymatches = array_filter($yymatches, 'strlen'); // remove empty sub-patterns
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next($yymatches); // skip global match
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$this->token = key($yymatches); // token number
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$this->value = current($yymatches); // token value
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$this->line = substr_count("\n", $this->value);
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}
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} while ($this->{'yy_r1_' . $this->token}() !== null);
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// accept
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$this->N += strlen($this->value);
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$this->line += substr_count("\n", $this->value);
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return true;
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}
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} else {
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throw new Exception('Unexpected input at line' . $this->line .
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': ' . $this->path[$this->N]);
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}
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break;
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} while (true);
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} // end function
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const START = 1;
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function yy_r1_1($yy_subpatterns)
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{
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$c = $yy_subpatterns[0];
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$part = self::createPart(Net_URL_Mapper_Part::DYNAMIC, $c, $this->value);
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$this->addPart($part);
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}
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function yy_r1_3($yy_subpatterns)
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{
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$c = $yy_subpatterns[0];
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$part = self::createPart(Net_URL_Mapper_Part::WILDCARD, $c, $this->value);
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$this->addPart($part);
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}
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function yy_r1_5($yy_subpatterns)
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{
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$c = $yy_subpatterns[0];
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$part = self::createPart(Net_URL_Mapper_Part::DYNAMIC, $c, $this->value);
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$this->addPart($part);
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}
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function yy_r1_7($yy_subpatterns)
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{
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$c = $yy_subpatterns[0];
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$part = self::createPart(Net_URL_Mapper_Part::WILDCARD, $c, $this->value);
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$this->addPart($part);
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}
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function yy_r1_9($yy_subpatterns)
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{
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$c = $yy_subpatterns[0];
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$part = self::createPart(Net_URL_Mapper_Part::FIXED, $c, $this->value);
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$this->addPart($part);
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}
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}
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?>
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