<?php

namespace App\Component\Models;

class Base
{
    public static function tofloat($num) {
        $dotPos = strrpos($num, '.');
        $commaPos = strrpos($num, ',');
        $sep = (($dotPos > $commaPos) && $dotPos) ? $dotPos :
            ((($commaPos > $dotPos) && $commaPos) ? $commaPos : false);

        if (!$sep) {
            return floatval(preg_replace("/[^0-9]/", "", $num));
        }

        return floatval(
            preg_replace("/[^0-9]/", "", substr($num, 0, $sep)) . '.' .
            preg_replace("/[^0-9]/", "", substr($num, $sep+1, strlen($num)))
        );
    }

    public static function validate_json($string)
    {
        // decode the JSON data
        $result = json_decode(utf8_encode($string), true, JSON_INVALID_UTF8_SUBSTITUTE);

        // switch and check possible JSON errors
        switch (json_last_error()) {
            case JSON_ERROR_NONE:
                $error = ''; // JSON is valid // No error has occurred
                break;
            case JSON_ERROR_DEPTH:
                $error = 'The maximum stack depth has been exceeded.';
                break;
            case JSON_ERROR_STATE_MISMATCH:
                $error = 'Invalid or malformed JSON.';
                break;
            case JSON_ERROR_CTRL_CHAR:
                $error = 'Control character error, possibly incorrectly encoded.';
                break;
            case JSON_ERROR_SYNTAX:
                $error = 'Syntax error, malformed JSON.';
                break;
            // PHP >= 5.3.3
            case JSON_ERROR_UTF8:
                $error = 'Malformed UTF-8 characters, possibly incorrectly encoded.';
                break;
            // PHP >= 5.5.0
            case JSON_ERROR_RECURSION:
                $error = 'One or more recursive references in the value to be encoded.';
                break;
            // PHP >= 5.5.0
            case JSON_ERROR_INF_OR_NAN:
                $error = 'One or more NAN or INF values in the value to be encoded.';
                break;
            case JSON_ERROR_UNSUPPORTED_TYPE:
                $error = 'A value of a type that cannot be encoded was given.';
                break;
            default:
                $error = 'Unknown JSON error occured.';
                break;
        }

        if ($error !== '') {
            // throw the Exception or exit // or whatever :)
            return false;
        }

        // everything is OK
        return true;
    }
}