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<?php

    namespace CzProject\PhpCli\Parameters;


    class Helpers
    {
        public function __construct()
        {
            throw new \CzProject\PhpCli\StaticClassException('This is static class.');
        }


        /**
         * @param  array|NULL
         * @param  string|NULL
         * @param  string|scalar
         * @param  bool
         * @return void
         */
        public static function assignParameter(&$parameters, $name, $value, $overwrite = FALSE)
        {
            if ($name === NULL) {
                $parameters[] = $value;
                return;
            }

            if (!isset($parameters[$name]) || $overwrite) {
                $parameters[$name] = $value;
                return;
            }

            if (!is_array($parameters[$name])) { // string|scalar
                $parameters[$name] = array(
                    $parameters[$name],
                    $value,
                );

            } else {
                $parameters[$name][] = $value;
            }
        }


        /**
         * Left side has pririoty. Helper method.
         * @param  array
         * @param  array
         * @return array|NULL
         */
        public static function merge($left, $right)
        {
            if (is_array($left) && is_array($right)) {
                foreach ($left as $key => $val) {
                    if (is_int($key)) {
                        $right[] = $val;

                    } else {
                        if (isset($right[$key])) {
                            $val = self::merge($val, $right[$key]);
                        }

                        $right[$key] = $val;
                    }
                }

                return $right;

            } elseif ($left === NULL && is_array($right)) {
                return $right;
            }

            return $left;
        }
    }