Artack\Color\Converter\RGBToHSLConverter::convert()

Complexity

Conditions	11
Paths	320

Size

Total Lines	35
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	24
CRAP Score	11

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function convert(Color $color): Color
    {
        /* @var RGB $color */
        Assert::isInstanceOf($color, RGB::class, sprintf('color should be an instance of [%s]', RGB::class));

        $red = $color->getRed() / 255;
        $green = $color->getGreen() / 255;
        $blue = $color->getBlue() / 255;

        $cMax = max($red, $green, $blue);
        $cMin = min($red, $green, $blue);
        $cDelta = $cMax - $cMin;

        $hue = $cMax;

        if (0 == $cDelta) {
            $hue = 0;
        } elseif ($cMax === $red) {
            $hue = ($green - $blue) / $cDelta;
        } elseif ($cMax === $green) {
            $hue = ($blue - $red) / $cDelta + 2;
        } elseif ($cMax === $blue) {
            $hue = ($red - $green) / $cDelta + 4;
        }

        $hue = (int) round($hue * 60);
        $hue = $hue < 0 ? $hue + 360 : $hue;

        $lightning = ($cMax + $cMin) / 2;
        $saturation = 0 === $cDelta ? 0 : $cDelta / (1 - abs(2 * $lightning - 1));

        $saturation = $saturation > 1 || $saturation < 0 ? 1 : $saturation;
        $lightning = $lightning > 1 || $lightning < 0 ? 1 : $lightning;

        return new HSL($hue, $saturation * 100, $lightning * 100);
    }