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   1  <?php
   2  
   3  /**
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2020 The s9e authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Parser\AttributeFilters;
   9  
  10  use s9e\TextFormatter\Parser\Logger;
  11  
  12  class NumericFilter
  13  {
  14      /**
  15      * Filter a float value
  16      *
  17      * @param  string $attrValue Original value
  18      * @return mixed             Filtered value, or FALSE if invalid
  19      */
  20  	public static function filterFloat($attrValue)
  21      {
  22          return filter_var($attrValue, FILTER_VALIDATE_FLOAT);
  23      }
  24  
  25      /**
  26      * Filter an int value
  27      *
  28      * @param  string $attrValue Original value
  29      * @return mixed             Filtered value, or FALSE if invalid
  30      */
  31  	public static function filterInt($attrValue)
  32      {
  33          return filter_var($attrValue, FILTER_VALIDATE_INT);
  34      }
  35  
  36      /**
  37      * Filter a range value
  38      *
  39      * @param  string  $attrValue Original value
  40      * @param  integer $min       Minimum value
  41      * @param  integer $max       Maximum value
  42      * @param  Logger  $logger    Parser's Logger instance
  43      * @return mixed              Filtered value, or FALSE if invalid
  44      */
  45  	public static function filterRange($attrValue, $min, $max, Logger $logger = null)
  46      {
  47          $attrValue = filter_var($attrValue, FILTER_VALIDATE_INT);
  48  
  49          if ($attrValue === false)
  50          {
  51              return false;
  52          }
  53  
  54          if ($attrValue < $min)
  55          {
  56              if (isset($logger))
  57              {
  58                  $logger->warn(
  59                      'Value outside of range, adjusted up to min value',
  60                      [
  61                          'attrValue' => $attrValue,
  62                          'min'       => $min,
  63                          'max'       => $max
  64                      ]
  65                  );
  66              }
  67  
  68              return $min;
  69          }
  70  
  71          if ($attrValue > $max)
  72          {
  73              if (isset($logger))
  74              {
  75                  $logger->warn(
  76                      'Value outside of range, adjusted down to max value',
  77                      [
  78                          'attrValue' => $attrValue,
  79                          'min'       => $min,
  80                          'max'       => $max
  81                      ]
  82                  );
  83              }
  84  
  85              return $max;
  86          }
  87  
  88          return $attrValue;
  89      }
  90  
  91      /**
  92      * Filter a uint value
  93      *
  94      * @param  string $attrValue Original value
  95      * @return mixed             Filtered value, or FALSE if invalid
  96      */
  97  	public static function filterUint($attrValue)
  98      {
  99          return filter_var($attrValue, FILTER_VALIDATE_INT, [
 100              'options' => ['min_range' => 0]
 101          ]);
 102      }
 103  }