includes/paths.php

   1 <?php
   2 /*=====================================================================*\
   3 || ################################################################### ||
   4 || # ViewSVN [#]version[#]
   5 || # --------------------------------------------------------------- # ||
   6 || # Copyright ©2002-[#]year[#] by Iris Studios, Inc. All Rights Reserved. # ||
   7 || # This file may not be reproduced in any way without permission.  # ||
   8 || # --------------------------------------------------------------- # ||
   9 || # User License Agreement at http://www.iris-studios.com/license/  # ||
  10 || ################################################################### ||
  11 \*=====================================================================*/
  12
  13 /**
  14 * Handles the various methods that are used to navigate
  15 * browser paths
  16 *
  17 * @package      ViewSVN
  18 */
  19
  20 /**
  21 * Path managing class that constructs and parses input
  22 * and output for paths
  23 *
  24 * @package      ViewSVN
  25 * @version      $Id$
  26 */
  27 class Paths
  28 {
  29         /**
  30         * Path manager type
  31         * @var  integer
  32         */
  33         var $type;
  34
  35         /**
  36         * Constructor: determine the type of linking to use
  37         *
  38         * @param        integer Path management type
  39         */
  40         function Paths($type)
  41         {
  42                 global $viewsvn;
  43
  44                 if ($type < 1 OR $type > 2)
  45                 {
  46                         $viewsvn->trigger->error('invalid path management type');
  47                 }
  48
  49                 $this->type = (int)$type;
  50         }
  51
  52         /**
  53         * Constructs a repository browser link
  54         *
  55         * @access       public
  56         *
  57         * @param        string  Base path
  58         * @param        string  Browser path, separated using '/'
  59         *
  60         * @return       string  Link path
  61         */
  62         function out($base, $addpath)
  63         {
  64                 global $viewsvn;
  65
  66                 $url = $this->fetch_arguments($base);
  67                 $addpath = $this->sanitize($addpath);
  68
  69                 // standard URL type
  70                 if ($this->type == 1)
  71                 {
  72                         return $url[0] . '?path=' . $addpath . ($url[1] ? '&amp;' . $url[1] : '');
  73                 }
  74                 // advanced path system
  75                 else if ($this->type == 2)
  76                 {
  77                         return $url[0] . ($addpath{0} != '/' ? '/' : '') . $addpath . ($url[1] ? '?' . $url[1] : '');
  78                 }
  79         }
  80
  81         /**
  82         * Parses an incoming path with the various methods
  83         * and returns a universal form
  84         *
  85         * @access       public
  86         *
  87         * @return       string  Universal path, separated using '/'
  88         */
  89         function parse()
  90         {
  91                 global $viewsvn;
  92
  93                 // standard URL type
  94                 if ($this->type == 1)
  95                 {
  96                         $path = $viewsvn->in['path'];
  97                 }
  98                 // advanced path system
  99                 else if ($this->type == 2)
 100                 {
 101                         if (@$_SERVER['PATH_INFO'])
 102                         {
 103                                 $path = $viewsvn->sanitize($_SERVER['PATH_INFO']);
 104                         }
 105                         else
 106                         {
 107                                 $viewsvn->trigger->error('server does not support type 2 management');
 108                         }
 109                 }
 110
 111                 if (!$path)
 112                 {
 113                         $viewsvn->trigger->error('invalid path sent');
 114                 }
 115
 116                 if (!$viewsvn->repos->verify($this->fetch_repos($path), $this->fetch_path($path)))
 117                 {
 118                         $viewsvn->trigger->error('invalid path');
 119                 }
 120
 121                 return $path;
 122         }
 123
 124         /**
 125         * Returns the name of the repository from a upath
 126         *
 127         * @access       public
 128         *
 129         * @param        string  Universal path
 130         *
 131         * @return       string  Repository name
 132         */
 133         function fetch_repos($path)
 134         {
 135                 $temp = preg_split('#/#', $path, 0, PREG_SPLIT_NO_EMPTY);
 136                 return $temp[0];
 137         }
 138
 139         /**
 140         * Returns the path without the repository from a upath
 141         *
 142         * @access       public
 143         *
 144         * @param        string  Universal path
 145         *
 146         * @return       string  Relative path
 147         */
 148         function fetch_path($path)
 149         {
 150                 $temp = preg_split('#/#', $path, 0, PREG_SPLIT_NO_EMPTY);
 151                 unset($temp[0]);
 152                 return '/' . implode('/', $temp);
 153         }
 154
 155         /**
 156         * Fetches any URL parameters a link has
 157         *
 158         * @access       public
 159         *
 160         * @param        string  Original URL
 161         *
 162         * @return       array   Two-element array: base path (no trailing '?'), arguments
 163         */
 164         function fetch_arguments($url)
 165         {
 166                 $return = array();
 167
 168                 if (($pos = strpos($url, '?')) !== false)
 169                 {
 170                         $return[0] = substr($url, 0, strlen($url) - $pos + 1);
 171                         $return[1] = substr($url, $pos + 1);
 172                 }
 173                 else
 174                 {
 175                         $return[0] = $url;
 176                         $return[1] = '';
 177                 }
 178
 179                 return $return;
 180         }
 181
 182         /**
 183         * Sanitizes a path for passing
 184         *
 185         * @access       private
 186         *
 187         * @param        string  Path
 188         *
 189         * @return       string  Cleaned string
 190         */
 191         function sanitize($path)
 192         {
 193                 return preg_replace('#[^a-z0-9\./\-]*#i', '', $path);
 194         }
 195 }
 196
 197 /*=====================================================================*\
 198 || ###################################################################
 199 || # $HeadURL$
 200 || # $Id$
 201 || ###################################################################
 202 \*=====================================================================*/
 203 ?>