Crossjoin\Json\Encoder

Complexity

Total Complexity

16

Size/Duplication

Total Lines	132
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes	4
Bugs	0	Features	0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	getEncoding()	0	4	1
A	setEncoding()	0	12	3
B	encode()	0	27	5
A	encodePhpGte55()	0	10	2
A	encodePhpLt55()	0	16	4

<?php
namespace Crossjoin\Json;

use Crossjoin\Json\Exception\EncodingNotSupportedException;
use Crossjoin\Json\Exception\InvalidArgumentException;

/**
 * Class Encoder
 *
 * @package Crossjoin\Json
 * @author Christoph Ziegenberg <ziegenberg@crossjoin.com>
 */
class Encoder extends Converter
{
    const UTF16 = self::UTF16BE;
    const UTF32 = self::UTF32BE;

    /**
     * @var string
     */
    private $encoding = self::UTF8;

    /**
     * Encoder constructor.
     *
     * @param string $encoding
     * @throws \Crossjoin\Json\Exception\EncodingNotSupportedException
     * @throws \Crossjoin\Json\Exception\InvalidArgumentException
     */
    public function __construct($encoding = self::UTF8)
    {
        $this->setEncoding($encoding);
    }

    /**
     * @return string
     */
    public function getEncoding()
    {
        return $this->encoding;
    }

    /**
     * @param string $encoding
     *
     * @throws \Crossjoin\Json\Exception\EncodingNotSupportedException
     * @throws \Crossjoin\Json\Exception\InvalidArgumentException
     */
    public function setEncoding($encoding)
    {
        if (is_string($encoding)) {
            if (in_array($encoding, array(self::UTF8, self::UTF16BE, self::UTF16LE, self::UTF32BE, self::UTF32LE), true)) {
                $this->encoding = $encoding;
            } else {
                throw new EncodingNotSupportedException(sprintf("Unsupported encoding '%s'.", $encoding), 1478101930);
            }
        } else {
            throw InvalidArgumentException::getInstance('string', 'encoding', $encoding, 1478196374);
        }
    }

    /**
     * @param mixed $value
     * @param int $options
     * @param int $depth
     *
     * @return string
     * @throws \Crossjoin\Json\Exception\NativeJsonErrorException
     * @throws \Crossjoin\Json\Exception\InvalidArgumentException
     * @throws \Crossjoin\Json\Exception\ExtensionRequiredException
     * @throws \Crossjoin\Json\Exception\ConversionFailedException
     */
    public function encode($value, $options = 0, $depth = 512)
    {
        // Check arguments
        if (!is_int($options)) {
            throw InvalidArgumentException::getInstance('integer', 'options', $options, 1478418109);
        } elseif (!is_int($depth)) {
            throw InvalidArgumentException::getInstance('integer', 'depth', $depth, 1478418110);
        }

        $toEncoding = $this->getEncoding();

        // Try to encode the data
        // @codeCoverageIgnoreStart
        if (version_compare(PHP_VERSION, '5.5.0', '>=')) {
            $json = $this->encodePhpGte55($value, $options, $depth);
        } else {
            $json = $this->encodePhpLt55($value, $options);
        }
        // @codeCoverageIgnoreEnd

        // Convert
        if ($toEncoding !== self::UTF8) {
            $json = $this->convertEncoding($json, self::UTF8, $toEncoding);
        }

        return $json;
    }

    /**
     * @param mixed $value
     * @param int $options
     * @param int $depth
     *
     * @return string
     * @throws \Crossjoin\Json\Exception\NativeJsonErrorException
     */
    private function encodePhpGte55($value, $options, $depth)
    {
        $json = \json_encode($value, $options, $depth);

        if (!is_string($json)) {
            throw $this->getNativeJsonErrorException();
        }

        return $json;
    }

    /**
     * @param mixed $value
     * @param int $options
     *
     * @return string
     * @throws \Crossjoin\Json\Exception\NativeJsonErrorException
     * @throws \Crossjoin\Json\Exception\InvalidArgumentException
     */
    private function encodePhpLt55($value, $options)
    {
        // Although the json_last_error() function exists, json_encode() in PHP < 5.5.0 sometimes
        // triggers an error, for example when an unsupported type is tried to be encoded. We
        // suppress these errors and throw an own exception instead.
        $json = @\json_encode($value, $options);
        if ($value !== null && $json === 'null') {
            throw new InvalidArgumentException('The type tried to encode is not supported.', 1478445896);
        }

        if (!is_string($json)) {
            throw $this->getNativeJsonErrorException();
        }

        return $json;
    }
}