<?php

namespace PSX\Http\Stream;

use InvalidArgumentException;
use PSX\Http\StreamInterface;

/**
 * Stream which operates on a PHP resource
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
class Stream implements StreamInterface
{
    protected $resource;
    protected $seekable;
    protected $readable;
    protected $writable;

    public function __construct($resource)
    {
        if (!is_resource($resource)) {
            throw new InvalidArgumentException('Must be an resource');
        }

        $this->setResource($resource);
    }

    public function close()
    {
        if ($this->resource) {
            fclose($this->resource);
        }

        $this->detach();
    }

    public function detach()
    {
        $handle = $this->resource;

        $this->resource = null;
        $this->seekable = $this->writable = $this->readable = false;

        return $handle;
    }

    public function getSize()
    {
        if ($this->resource) {
            $stat = fstat($this->resource);

            return isset($stat['size']) ? $stat['size'] : null;
        }

        return null;
    }

    public function tell()
    {
        if ($this->resource) {
            return ftell($this->resource);
        }

        return false;
    }

    public function eof()
    {
        if ($this->resource) {
            return feof($this->resource);
        }

        return true;
    }

    public function rewind()
    {
        if ($this->resource) {
            return rewind($this->resource);
        }

        return true;
    }

    public function isSeekable()
    {
        return $this->seekable;
    }

    public function seek($offset, $whence = SEEK_SET)
    {
        if ($this->resource && $this->seekable) {
            return fseek($this->resource, $offset, $whence);
        }

        return false;
    }

    public function isWritable()
    {
        return $this->writable;
    }

    public function write($string)
    {
        if ($this->resource && $this->writable) {
            return fwrite($this->resource, $string);
        }

        return false;
    }

    public function isReadable()
    {
        return $this->readable;
    }

    public function read($length)
    {
        if ($this->resource && $this->readable && $length > 0) {
            return fread($this->resource, $length);
        }

        return false;
    }

    public function getContents()
    {
        if ($this->resource && $this->readable) {
            return (string) stream_get_contents($this->resource);
        }

        return null;
    }

    public function getMetadata($key = null)
    {
        if ($this->resource) {
            $meta = stream_get_meta_data($this->resource);

            if ($key === null) {
                return $meta;
            } else {
                return isset($meta[$key]) ? $meta[$key] : null;
            }
        }

        return $key === null ? array() : null;
    }

    public function __toString()
    {
        if ($this->resource && $this->readable) {
            return (string) stream_get_contents($this->resource, -1, 0);
        }

        return '';
    }

    protected function setResource($resource)
    {
        $meta = stream_get_meta_data($resource);
        $mode = $meta['mode'] . ' ';

        $this->resource = $resource;
        $this->seekable = $meta['seekable'];
        $this->writable = $mode[0] != 'r' || $mode[1] == '+';
        $this->readable = $mode[0] == 'r' || $mode[1] == '+';
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDM3MjUzNzk5OTE0NzczNCA1MDU4Mzg3NzczMjMxNzgwIDYxNzcwMzY5OTI2OTY0Njg=