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Viewing / Editing File: Hex.php

<?php

namespace Spatie\Color;

class Hex implements Color
{
    /** @var string */
    protected $red;
    protected $green;
    protected $blue;
    protected $alpha = 'ff';

public function __construct(string $red, string $green, string $blue, string $alpha = 'ff')
    {
        Validate::hexChannelValue($red);
        Validate::hexChannelValue($green);
        Validate::hexChannelValue($blue);
        Validate::hexChannelValue($alpha);

$this->red = strtolower($red);
        $this->green = strtolower($green);
        $this->blue = strtolower($blue);
        $this->alpha = strtolower($alpha);
    }

public static function fromString(string $string)
    {
        Validate::hexColorString($string);

$string = ltrim($string, '#');

switch (strlen($string)) {
            case 3:
                [$red, $green, $blue] = str_split($string);
                $red .= $red;
                $green .= $green;
                $blue .= $blue;
                $alpha = 'ff';

break;

case 4:
                [$red, $green, $blue, $alpha] = str_split($string);
                $red .= $red;
                $green .= $green;
                $blue .= $blue;
                $alpha .= $alpha;

break;

default:
            case 6:
                [$red, $green, $blue] = str_split($string, 2);
                $alpha = 'ff';

break;

case 8:
                [$red, $green, $blue, $alpha] = str_split($string, 2);

break;
        }

return new static($red, $green, $blue, $alpha);
    }

public function red(): string
    {
        return $this->red;
    }

public function green(): string
    {
        return $this->green;
    }

public function blue(): string
    {
        return $this->blue;
    }

public function alpha(): string
    {
        return $this->alpha;
    }

public function toCIELab(): CIELab
    {
        return $this->toRgb()->toCIELab();
    }

public function toCmyk(): Cmyk
    {
        return $this->toRgb()->toCmyk();
    }

public function toHex(?string $alpha = null): self
    {
        return new self($this->red, $this->green, $this->blue, $alpha ?? $this->alpha);
    }

public function toHsb(): Hsb
    {
        return $this->toRgb()->toHsb();
    }

public function toHsl(): Hsl
    {
        [$hue, $saturation, $lightness] = Convert::rgbValueToHsl(
            Convert::hexChannelToRgbChannel($this->red),
            Convert::hexChannelToRgbChannel($this->green),
            Convert::hexChannelToRgbChannel($this->blue)
        );

return new Hsl($hue, $saturation, $lightness);
    }

public function toHsla(?float $alpha = null): Hsla
    {
        return $this->toRgb()->toHsla($alpha ?? Convert::hexAlphaToFloat($this->alpha));
    }

public function toRgb(): Rgb
    {
        return new Rgb(
            Convert::hexChannelToRgbChannel($this->red),
            Convert::hexChannelToRgbChannel($this->green),
            Convert::hexChannelToRgbChannel($this->blue)
        );
    }

public function toRgba(?float $alpha = null): Rgba
    {
        return $this->toRgb()->toRgba($alpha ?? Convert::hexAlphaToFloat($this->alpha));
    }

public function toXyz(): Xyz
    {
        return $this->toRgb()->toXyz();
    }

public function __toString(): string
    {
        return "#{$this->red}{$this->green}{$this->blue}" . ($this->alpha !== 'ff' ? $this->alpha : '');
    }
}

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