lib/ParameterParser.php

   1 <?php
   2
   3 class ParameterParser
   4 {
   5     private $aParams;
   6
   7     function __construct($aParams=NULL)
   8     {
   9         $this->aParams = ($aParams === NULL) ? $_GET : $aParams;
  10     }
  11
  12     function getBool($sName, $bDefault=false)
  13     {
  14         if (!isset($this->aParams[$sName]) || strlen($this->aParams[$sName]) == 0)
  15         {
  16             return $bDefault;
  17         }
  18
  19         return (bool) $this->aParams[$sName];
  20     }
  21
  22     function getInt($sName, $bDefault=false)
  23     {
  24         if (!isset($this->aParams[$sName]) || strlen($this->aParams[$sName]) == 0)
  25         {
  26             return $bDefault;
  27         }
  28
  29         if (!preg_match('/^[+-]?[0-9]+$/', $this->aParams[$sName]))
  30         {
  31             userError("Integer number expected for parameter '$sName'");
  32         }
  33
  34         return (int) $this->aParams[$sName];
  35     }
  36
  37     function getFloat($sName, $bDefault=false)
  38     {
  39         if (!isset($this->aParams[$sName]) || strlen($this->aParams[$sName]) == 0)
  40         {
  41             return $bDefault;
  42         }
  43
  44         if (!preg_match('/^[+-]?[0-9]*\.?[0-9]+$/', $this->aParams[$sName]))
  45         {
  46             userError("Floating-point number expected for parameter '$sName'");
  47         }
  48
  49         return (float) $this->aParams[$sName];
  50     }
  51
  52     function getString($sName, $bDefault=false)
  53     {
  54         if (!isset($this->aParams[$sName]) || strlen($this->aParams[$sName]) == 0)
  55         {
  56             return $bDefault;
  57         }
  58
  59         return $this->aParams[$sName];
  60     }
  61
  62     function getSet($sName, $aValues, $sDefault=false)
  63     {
  64         if (!isset($this->aParams[$sName]) || strlen($this->aParams[$sName]) == 0)
  65         {
  66             return $sDefault;
  67         }
  68
  69         if (!in_array($this->aParams[$sName], $aValues))
  70         {
  71             userError("Parameter '$sName' must be one of: ".join(', ', $aValues));
  72         }
  73
  74         return $this->aParams[$sName];
  75     }
  76
  77     function getStringList($sName, $aDefault=false)
  78     {
  79         $sValue = $this->getString($sName);
  80
  81         if ($sValue)
  82         {
  83             return explode(',', $sValue);
  84         }
  85
  86         return $aDefault;
  87     }
  88
  89     function getPreferredLanguages($sFallback=NULL)
  90     {
  91         if ($sFallback === NULL && isset($_SERVER["HTTP_ACCEPT_LANGUAGE"]))
  92         {
  93             $sFallback = $_SERVER["HTTP_ACCEPT_LANGUAGE"];
  94         }
  95
  96         $aLanguages = array();
  97         $sLangString = $this->getString('accept-language', $sFallback);
  98
  99         if ($sLangString)
 100         {
 101             if (preg_match_all('/(([a-z]{1,8})(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', $sLangString, $aLanguagesParse, PREG_SET_ORDER))
 102             {
 103                 foreach($aLanguagesParse as $iLang => $aLanguage)
 104                 {
 105                     $aLanguages[$aLanguage[1]] = isset($aLanguage[5])?(float)$aLanguage[5]:1 - ($iLang/100);
 106                     if (!isset($aLanguages[$aLanguage[2]])) $aLanguages[$aLanguage[2]] = $aLanguages[$aLanguage[1]]/10;
 107                 }
 108                 arsort($aLanguages);
 109             }
 110         }
 111         if (!sizeof($aLanguages) && CONST_Default_Language)
 112         {
 113             $aLanguages[CONST_Default_Language] = 1;
 114         }
 115
 116         foreach($aLanguages as $sLanguage => $fLanguagePref)
 117         {
 118             $aLangPrefOrder['short_name:'.$sLanguage] = 'short_name:'.$sLanguage;
 119             $aLangPrefOrder['name:'.$sLanguage] = 'name:'.$sLanguage;
 120         }
 121         $aLangPrefOrder['short_name'] = 'short_name';
 122         $aLangPrefOrder['name'] = 'name';
 123         $aLangPrefOrder['brand'] = 'brand';
 124         foreach($aLanguages as $sLanguage => $fLanguagePref)
 125         {
 126             $aLangPrefOrder['official_name:'.$sLanguage] = 'official_name:'.$sLanguage;
 127         }
 128         $aLangPrefOrder['official_name'] = 'official_name';
 129         $aLangPrefOrder['ref'] = 'ref';
 130         $aLangPrefOrder['type'] = 'type';
 131         return $aLangPrefOrder;
 132     }
 133 }