StreamedReadingTrait.php

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<?php

namespace League\Flysystem\Adapter\Polyfill;

trait StreamedReadingTrait
{
    public function readStream($path)
    {
        if ( ! $data = $this->read($path)) {
            return false;
        }

        $stream = fopen('php://temp', 'w+b');
        fwrite($stream, $data['contents']);
        rewind($stream);
        $data['stream'] = $stream;
        unset($data['contents']);

        return $data;
    }

    abstract public function read($path);
}