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<?php
namespace RocketTheme\Toolbox\File;

/**
 * Implements Log File reader.
 *
 * @package RocketTheme\Toolbox\File
 * @author RocketTheme
 * @license MIT
 */
class LogFile extends File
{
    /**
     * @var array|File[]
     */
    static protected $instances = [];

    /**
     * Constructor.
     */
    protected function __construct()
    {
        parent::__construct();

        $this->extension = '.log';
    }

    /**
     * Check contents and make sure it is in correct format.
     *
     * @param array $var
     * @return array
     */
    protected function check($var)
    {
        return (array) $var;
    }

    /**
     * Encode contents into RAW string (unsupported).
     *
     * @param string $var
     * @return string|void
     * @throws \BadMethodCallException
     */
    protected function encode($var)
    {
        throw new \BadMethodCallException('Saving log file is
forbidden.');
    }

    /**
     * Decode RAW string into contents.
     *
     * @param string $var
     * @return array mixed
     */
    protected function decode($var)
    {
        $lines = (array) preg_split('#(\r\n|\n|\r)#', $var);

        $results = array();
        foreach ($lines as $line) {
            preg_match('#^\[(.*)\] (.*)  @  (.*)  @@  (.*)$#',
$line, $matches);
            if ($matches) {
                $results[] = ['date' => $matches[1],
'message' => $matches[2], 'url' => $matches[3],
'file' => $matches[4]];
            }
        }

        return $results;
    }
}