<?php

declare(strict_types=1);

namespace app\common\service\followupaudio;

/** Do not buffer a 500 MB recording into PHP memory or allow public caching. */
final class FollowupAudioStream extends \think\Response
{
    private string $path;

    public function __construct(string $path, string $extension)
    {
        $this->path = $path;
        $this->init('', 200);
        $mime = ['mp3' => 'audio/mpeg', 'm4a' => 'audio/mp4', 'wav' => 'audio/wav', 'amr' => 'audio/amr'][$extension];
        $this->header([
            'Content-Type' => $mime, 'Content-Length' => (string) filesize($path),
            'Content-Disposition' => 'inline; filename="recording.' . $extension . '"',
            'Cache-Control' => 'private, no-store, max-age=0', 'Pragma' => 'no-cache',
            'X-Content-Type-Options' => 'nosniff', 'Accept-Ranges' => 'none',
        ]);
    }

    protected function sendData(string $data): void
    {
        $stream = fopen($this->path, 'rb');
        if ($stream === false) {
            return;
        }
        try {
            while (!feof($stream) && !connection_aborted()) {
                echo fread($stream, 1048576);
            }
        } finally {
            fclose($stream);
        }
    }
}