<?php

namespace PSX\Http\Stream;

use PSX\Http\StreamInterface;

/**
 * Stream which works on a string
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
class StringStream implements StreamInterface
{
    protected $data;
    protected $length;
    protected $pointer = 0;

    public function __construct($data = '')
    {
        $this->data   = $data;
        $this->length = mb_strlen($data);
    }

    public function close()
    {
        $this->data   = null;
        $this->length = 0;
    }

    public function detach()
    {
        if ($this->data !== null) {
            $handle = fopen('php://memory', 'r+');
            fwrite($handle, $this->data);
            fseek($handle, 0);

            $this->close();

            return $handle;
        }

        return null;
    }

    public function getSize()
    {
        return $this->length;
    }

    public function tell()
    {
        return $this->pointer;
    }

    public function eof()
    {
        if ($this->data !== null) {
            return $this->pointer >= $this->length;
        }

        return true;
    }

    public function rewind()
    {
        if ($this->data !== null) {
            $this->pointer = 0;
        }

        return true;
    }

    public function isSeekable()
    {
        return $this->data !== null;
    }

    public function seek($offset, $whence = SEEK_SET)
    {
        if ($this->isSeekable()) {
            if ($whence === SEEK_SET) {
                $this->pointer = $offset;
            } elseif ($whence === SEEK_CUR) {
                $this->pointer+= $offset;
            } elseif ($whence === SEEK_END) {
                $this->pointer = $this->length + $offset;
            }
        }

        return false;
    }

    public function isWritable()
    {
        return $this->data !== null;
    }

    public function write($string)
    {
        if ($this->isWritable()) {
            $length = mb_strlen($string);
            $pre    = mb_substr($this->data, 0, $this->pointer);
            $post   = mb_substr($this->data, $this->pointer + $length);

            $this->data = $pre . $string . $post;

            $this->pointer+= $length;
            $this->length = mb_strlen($this->data);

            return $length;
        }

        return false;
    }

    public function isReadable()
    {
        return $this->data !== null;
    }

    public function read($maxLength)
    {
        if ($this->isReadable()) {
            $data = mb_substr($this->data, $this->pointer, $maxLength);

            $this->pointer+= $maxLength;

            return $data;
        }

        return false;
    }

    public function getContents()
    {
        if ($this->data === null) {
            return null;
        }

        $data = mb_substr($this->data, $this->pointer);

        $this->pointer = $this->length;

        return $data;
    }

    public function getMetadata($key = null)
    {
        return $key === null ? array() : null;
    }

    public function __toString()
    {
        $this->pointer = $this->length;

        return $this->data === null ? '' : $this->data;
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTkzOTcxMTg2NDg5MzkxMSAxMDAwMDIwNjI4NDEzNzY2IDM4NjYzODM2OTg3ODI4NDQ=