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   1  <?php
   2  
   3  namespace LesserPHP\Functions;
   4  
   5  use Exception;
   6  use LesserPHP\Utils\Asserts;
   7  
   8  /**
   9   * Implements the color definition functions of LESS
  10   *
  11   * @link https://lesscss.org/functions/#color-definition
  12   */
  13  class ColorDefinition extends AbstractFunctionCollection
  14  {
  15      /** @inheritdoc */
  16      public function getFunctions(): array
  17      {
  18          return [
  19              //'rgb' => [$this, 'rgb'],
  20              //'rgba' => [$this, 'rgba'],
  21              'rgbahex' => [$this, 'rgbahex'],
  22              'argb' => [$this, 'argb'],
  23              //'hsl' => [$this, 'hsl'],
  24              //'hsla' => [$this, 'hsla'],
  25              //'hsv' => [$this, 'hsv'],
  26              //'hsva' => [$this, 'hsva'],
  27          ];
  28      }
  29  
  30      // rgb is missing
  31      // rgba is missing
  32  
  33      /**
  34       * Creates a hex representation of a color in #AARRGGBB format (NOT #RRGGBBAA!)
  35       *
  36       * This method does not exist in the official less.js implementation
  37       * @see lib_argb
  38       * @throws Exception
  39       */
  40      public function rgbahex(array $color): string
  41      {
  42          $color = Asserts::assertColor($color);
  43  
  44          return sprintf(
  45              '#%02x%02x%02x%02x',
  46              isset($color[4]) ? $color[4] * 255 : 255,
  47              $color[1],
  48              $color[2],
  49              $color[3]
  50          );
  51      }
  52  
  53      /**
  54       * Creates a hex representation of a color in #AARRGGBB format (NOT #RRGGBBAA!)
  55       *
  56       * @https://lesscss.org/functions/#color-definition-argb
  57       * @throws Exception
  58       */
  59      public function argb(array $color): string
  60      {
  61          return $this->rgbahex($color);
  62      }
  63  
  64      // hsl is missing
  65  
  66      // hsla is missing
  67  
  68      // hsv is missing
  69  
  70      // hsva is missing
  71  }