moay/loxberry-php-core

<?php

namespace LoxBerry\System;

/**
 * Class class LowLevelExecutor.
 *
 * Helper class to allow proper testing of the library without regard for low level issues
 */
class LowLevelExecutor
{
    const USERNAME = 'loxberry';

    /**
     * @param string $name
     *
     * @return array|false|string
     */
    public function getEnvironmentVariable(string $name)
    {
        return $this->execLowLevelFunction('getenv', $name);
    }

    /**
     * @param string $file
     *
     * @return string
     */
    public function getFileOwner(string $file): string
    {
        $fileOwner = $this->execLowLevelFunction('fileowner', $file);

        return $this->execLowLevelFunction('posix_getpwuid', $fileOwner)['name'];
    }

    /**
     * @param string $file
     * @param string $userName
     *
     * @return bool
     */
    public function setFileOwner(string $file, string $userName): bool
    {
        return $this->execLowLevelFunction('chown', [$file, $userName]);
    }

    /**
     * @param string $userName
     *
     * @return array
     */
    public function getUserInfo(string $userName)
    {
        $userInfo = $this->execLowLevelFunction('posix_getpwnam', $userName);

        return $this->execLowLevelFunction('posix_getpwuid', $userInfo);
    }

    /**
     * @param string $message
     *
     * @return bool
     */
    public function errorLog(string $message): bool
    {
        return $this->execLowLevelFunction('error_log', $message);
    }

    /**
     * @param resource $handle
     * @param string   $message
     * @param int|null $length
     *
     * @return int|bool
     */
    public function fwrite($handle, string $message, ?int $length = null)
    {
        return $this->execLowLevelFunction('fwrite', [$handle, $message, $length]);
    }

    /**
     * @param $filename
     * @param bool        $use_include_path
     * @param string|null $context
     * @param int         $offset
     * @param int|null    $maxlen
     *
     * @return string|bool
     */
    public function fileGetContents($filename, bool $use_include_path = false, $context = null, int $offset = 0, ?int $maxlen = null)
    {
        return $this->execLowLevelFunction('file_get_contents', [$filename, $use_include_path, $context, $offset, $maxlen]);
    }

    /**
     * @param resource $socket
     * @param string   $buf
     * @param int      $len
     * @param int      $flags
     * @param string   $addr
     * @param int      $port
     */
    public function sendToSocket($socket, string $buf, int $len, int $flags, string $addr, int $port = 0)
    {
        $this->execLowLevelFunction('socket_sendto', func_get_args());
    }

    /**
     * @param string $functionName
     * @param $arguments
     *
     * @return mixed
     */
    public function execLowLevelFunction(string $functionName, $arguments)
    {
        if (!function_exists($functionName)) {
            throw new \InvalidArgumentException(sprintf('Cannot call low level function %s', $functionName));
        }

        if (!is_array($arguments)) {
            return call_user_func($functionName, $arguments);
        }

        return call_user_func_array($functionName, $arguments);
    }
}