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