<?php
namespace nulib\file\base;

use nulib\os\IOException;
use nulib\web\http;

abstract class _File extends Stream {
  function __construct($fd, bool $close, bool $throwOnError=true, ?bool $allowLocking=null) {
    parent::__construct($fd, $close, $throwOnError, $allowLocking);
  }

  /** @var string */
  protected $file;

  /** @var string */
  protected $mode;

  /** @return resource */
  protected function open() {
    return IOException::ensure_valid(@fopen($this->file, $this->mode));
  }

  /** @return resource */
  function getResource() {
    if ($this->fd === null && $this->file !== null) $this->fd = $this->open();
    return parent::getResource();
  }

  /** streamer le contenu du fichier en sortie */
  function readfile(?string $contentType=null, ?string $charset=null, ?string $filename=null, string $disposition=null): bool {
    if ($contentType !== null) http::content_type($contentType, $charset);
    if ($filename !== null) http::download_as($filename, $disposition);
    return readfile($this->file) !== false;
  }
}