<?php

namespace ElephantIO;

/**
 * A sequence data reader.
 *
 * @author Toha <tohenk@yahoo.com>
 */
class SequenceReader
{
    /** @var string */
    protected $data = null;

    /**
     * Constructor.
     *
     * @param string $data
     */
    public function __construct($data)
    {
        $this->data = $data;
    }

    /**
     * Read a fixed size data or remaining data if size is null.
     *
     * @param int $size
     * @return string
     */
    public function read($size = 1)
    {
        if (!$this->isEof()) {
            if (null === $size) {
                $result = $this->data;
                $this->data = '';
            } else {
                $result = mb_substr($this->data, 0, $size);
                $this->data = mb_substr($this->data, $size);
            }

            return $result;
        }
    }

    /**
     * Read data up to delimiter.
     *
     * @param string $delimiter
     * @param array $noskips
     * @return null|string
     */
    public function readUntil($delimiter = ',', $noskips = [])
    {
        if (!$this->isEof()) {
            list($p, $d) = $this->getPos($this->data, $delimiter);
            if (false !== $p) {
                $result = mb_substr($this->data, 0, $p);
                // skip delimiter
                if (!in_array($d, $noskips)) {
                    $p += mb_strlen($d);
                }
                $this->data = mb_substr($this->data, $p);

                return $result;
            }
        }
    }

    /**
     * Read data up to delimiter within boundaries.
     *
     * @param string $delimiter
     * @param array $boundaries
     * @return null|string
     */
    public function readWithin($delimiter = ',', $boundaries = [])
    {
        if (!$this->isEof()) {
            list($p, $d) = $this->getPos($this->data, implode(array_merge([$delimiter], $boundaries)));
            if (false !== $p && $d === $delimiter) {
                $result = mb_substr($this->data, 0, $p);
                $this->data = mb_substr($this->data, $p + mb_strlen($d));

                return $result;
            }
        }
    }

    /**
     * Get first position of delimiter.
     *
     * @param string $delimiter
     * @return false|int False if delimiter is not found otherwize the position found
     */
    public function getDelimited($delimiter)
    {
        list($pos, ) = $this->getPos($this->data, $delimiter);

        return $pos;
    }

    /**
     * Get first position of delimiters.
     *
     * @param string $data
     * @param string $delimiter
     * @return array Index 0 indicate position found or false and index 1 indicate matched delimiter
     */
    protected function getPos($data, $delimiter)
    {
        $pos = false;
        $delim = null;
        for ($i = 0; $i < mb_strlen($delimiter); $i++) {
            $d = mb_substr($delimiter, $i, 1);
            if (false !== ($p = mb_strpos($data, $d))) {
                if (false === $pos || $p < $pos) {
                    $pos = $p;
                    $delim = $d;
                }
            }
        }

        return [$pos, $delim];
    }

    /**
     * Read unprocessed data without increase sequence position.
     *
     * @param int $size
     * @return string
     */
    public function readData($size = 1)
    {
        return mb_substr($this->data, 0, $size);
    }

    /**
     * Get unprocessed data.
     *
     * @return string
     */
    public function getData()
    {
        return $this->data;
    }

    /**
     * Is EOF.
     *
     * @return boolean
     */
    public function isEof()
    {
        return 0 === mb_strlen($this->data) ? true : false;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDA1OTA2MzA1NzAzNzg2MiA4NzgyMTg4ODk0MDE4MjIxIDMwMDM3MTQ1MzA2NDU3ODY=