<?php

declare(strict_types=1);

namespace Intervention\Gif\Encoders;

use Intervention\Gif\Blocks\Color;
use Intervention\Gif\Blocks\ColorTable;
use Intervention\Gif\Exceptions\EncoderException;

class ColorTableEncoder extends AbstractEncoder
{
    /**
     * Create new instance
     *
     * @param ColorTable $source
     */
    public function __construct(ColorTable $source)
    {
        $this->source = $source;
    }

    /**
     * Encode current source
     *
     * @throws EncoderException
     * @return string
     */
    public function encode(): string
    {
        return implode('', array_map(
            fn(Color $color): string => $color->encode(),
            $this->source->getColors(),
        ));
    }
}