docs/include/classes/UrlRewrite/ContentUrl.class.php

   1 <?php
   2 /************************************************************************/
   3 /* ATutor                                                                                                                               */
   4 /************************************************************************/
   5 /* Copyright (c) 2002-2010                                              */
   6 /* Inclusive Design Institute                                           */
   7 /* http://atutor.ca                                                     */
   8 /* This program is free software. You can redistribute it and/or        */
   9 /* modify it under the terms of the GNU General Public License          */
  10 /* as published by the Free Software Foundation.                        */
  11 /************************************************************************/
  12 // $Id$
  13 /**
  14 * ContentUrl
  15 * Class for rewriting pretty urls.
  16 * @access       public
  17 * @author       Harris Wong
  18 * @package      UrlParser
  19 */
  20 class ContentUrl {
  21         // constructor
  22         function ContentUrl() {
  23                 $this->rule = array(0=>'cid');
  24         }
  25
  26         /**
  27          * Construct pretty url by the given query string.
  28          */
  29         function constructPrettyUrl($query){
  30                 $url = '';  //url to be returned
  31                 $bookmark = '';         //html bookmark
  32
  33                 if (empty($query)){
  34                         return '';
  35                 }
  36
  37                 //Take out bookmark
  38                 if (($pos = strpos($query, '#'))!==FALSE){
  39                         $bookmark = substr($query, $pos);
  40                         $query = substr($query, 0, $pos);
  41                 }
  42
  43                 //If this is already a pretty url,but without mod_apache rule
  44                 //unwrap it and reconstruct
  45                 if (is_array($query)){
  46                         $new_query = '';
  47                         foreach($query as $fk=>$fv){
  48                                 if      (preg_match('/\.php/', $fv)==1){
  49                                         continue;       //skip the php file
  50                                 }
  51
  52                                 //check if this is part of the rule, if so,add it, o/w ignore
  53                                 if (array_search($fv, $this->rule)!==FALSE){
  54                                         $new_query .= $fv . '=' . $query[$fk+1] . SEP;
  55                                 }
  56                         }
  57                         $query = $new_query;    //done
  58                 }
  59
  60                 $temp = explode(SEP, $query);
  61                 foreach ($temp as $index=>$attributes){
  62                         if(empty($attributes)){
  63                                 //skip the ones that are empty.
  64                                 continue;
  65                         }
  66                         list($key, $value) = preg_split('/\=/', $attributes, 2);
  67                         $query_parts[$key] = $value;
  68                 }
  69
  70                 $query_string = '';
  71                 //construct pretty url on mapping
  72                 foreach ($this->rule as $key=>$value){
  73                         //if this value is empty, the url construction should quit.
  74                         if ($query_parts[$value] ==''){
  75                                 break;
  76                         }
  77                         $url .= $query_parts[$value].'/';
  78
  79                         //if the query parts are not in the defined rules, set it back to query string again
  80                         if ($query_parts[$this->rule[$key]]!=''){
  81                                 $query_parts[$this->rule[$key]] = '';
  82                         }
  83                 }
  84
  85                 //Go through the query_parts again, and for those values that are not empty
  86                 // add it to the querystring
  87                 foreach($query_parts as $key=>$value){
  88                         //paginator are handle differently
  89                         if ($value!='' && $key!='page'){
  90                                 $query_string .= $key.'='.$value.SEP;
  91                         }
  92                 }
  93                 //take out the last sep.
  94                 $query_string = substr($query_string, 0, -1);
  95
  96                 //handle paginators
  97 //              if ($query_parts['page']!=''){
  98 //                      $url .= '/'.$query_parts['page'].'.html';
  99 //              }
 100
 101                 //append query string at the back
 102                 if ($query_string!=''){
 103                         $url .= '?'.$query_string;
 104                 }
 105
 106                 //finally, append bookmark if not emptied
 107                 if ($bookmark!=''){
 108                         $url .= $bookmark;
 109                 }
 110
 111                 return $url;
 112         }
 113 }
 114 ?>