<?php

namespace App\Http\Services;

use DateTime;

class CheckParamService
{
    
    public function __construct()
    {
    }
    
    public function LenMToN($str, $m, $n)
    {
        if (mb_strlen($str) >= $m && mb_strlen($str) <= $n) {
            return true;
        } else {
            return false;
        }
    }
    
    public function isascii($str)
    {
        if (mb_detect_encoding($str) == "ASCII") {
            return true;
        } else {
            return false;
        }
    }
    
    public function isengnum($str)
    {
        return (preg_match("/^[a-zA-Z0-9]+$/", $str) == 1);
    }
    
    public function isnum($str)
    {
        return (preg_match("/^[0-9]+$/", $str) == 1);
    }
    
    public function isPhone($str)
    {
        return (preg_match("/^09[0-9]{8}$/", $str));
    }
    
    public function isImei($imei)
    {
        // Should be 15 digits
        if (strlen($imei) != 15 || !ctype_digit($imei))
            return false;
        // Get digits
        $digits = str_split($imei);
        // Remove last digit, and store it
        $imei_last = array_pop($digits);
        // Create log
        $log = array();
        // Loop through digits
        foreach ($digits as $key => $n) {
            // If key is odd, then count is even
            if ($key & 1) {
                // Get double digits
                $double = str_split($n * 2);
                // Sum double digits
                $n = array_sum($double);
            }
            // Append log
            $log[] = $n;
        }
        // Sum log & multiply by 9
        $sum = array_sum($log) * 9;
        
        // Compare the last digit with $imei_last
        return substr($sum, -1) == $imei_last;
    }
    
    public function validateDate($date, $format = 'Y-m-d H:i:s')
    {
        $d = DateTime::createFromFormat($format, $date);
        
        return $d && $d->format($format) == $date;
    }
    
    public function RemoveChars($str, $chars)
    {
        $chars = str_split($chars, 1);
        for ($i = 0; $i < count($chars); $i++) $str = str_replace($chars[ $i ], "", $str);
        
        return $str;
    }
    
}