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Filename : Decoder.php

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<?php

declare(strict_types=1);

namespace Intervention\Gif;

use Intervention\Gif\Exceptions\DecoderException;
use Intervention\Gif\Traits\CanHandleFiles;

class Decoder
{
    use CanHandleFiles;

    /**
     * Decode given input
     *
     * @param string|resource $input
     * @throws DecoderException
     * @return GifDataStream
     */
    public static function decode(mixed $input): GifDataStream
    {
        $handle = match (true) {
            self::isFilePath($input) => self::getHandleFromFilePath($input),
            is_string($input) => self::getHandleFromData($input),
            self::isFileHandle($input) => $input,
            default => throw new DecoderException(
                'Decoder input must be either file path, file pointer resource or binary data.'
            )
        };

        rewind($handle);

        return GifDataStream::decode($handle);
    }

    /**
     * Determine if input is file pointer resource
     *
     * @param mixed $input
     * @return bool
     */
    private static function isFileHandle(mixed $input): bool
    {
        return is_resource($input) && get_resource_type($input) === 'stream';
    }
}