Laravel Data Masking (Encode & Decode Model fields ) Trait

Laravel Data Masking (Encode & Decode Model fields ) Trait

/*
** saeed abdollahian
** Freelance PHP developer & consultant. Laravel specialist.
** Freelance (available)
** https://t.me/PhpWebDeveloper
*/
<?php
namespace App;

/*
Usage:

only add this lines to your model(s):

use App\EncoderTrait;

use EncoderTrait

  #filds name for encode/decode
  private static $encode_cols =[
    'email',
    'phone',
  ];
*/
trait EncoderTrait
{
    protected static function boot()
    {
        parent::boot();

        #On retrieved Event
        static::retrieved(function ($model) {
            if (isset($model::$encode_cols)) {
                $encode_cols = $model::$encode_cols;

                foreach ($encode_cols as $key => $value) {
                    $model->$value = self::decode_item($model->$value);
                }
            }
        });
        #On creating Event
        static::creating(function ($model) {
            if (isset($model::$encode_cols)) {
                $encode_cols = $model::$encode_cols;

                $original = $model->getAttributes();
                $original = array_keys($original);

                foreach ($encode_cols as $key => $value) {
                    if (in_array($value, $original)) {
                        $model->$value = self::encode_item($model->$value);
                    }
                }
            }
        });

        #On updating Event
        static::updating(function ($model) {
            if (isset($model::$encode_cols)) {
                $encode_cols = $model::$encode_cols;

                $changes = $model->getDirty();

                $changes = array_keys($changes);
                if (count($changes) > 0) {
                    foreach ($encode_cols as $key => $value) {
                        if (in_array($value, $changes)) {
                            $model->$value = self::encode_item($model->$value);
                        }
                    }
                }
            }
        });
    }

    /*
        change encode/Decode Functions
    */
    protected static function encode_item($string)
    {
        //return base64_encode($string);

        if (!$string) {
            return false;
        }

        $key = sha1(env('APP_KEY','abcd123'));
        $strLen = strlen($string);
        $keyLen = strlen($key);
        $j = 0;
        $crypttext = "";

        for ($i = 0; $i < $strLen; $i++) {
            $ordStr = ord(substr($string, $i, 1));
            if ($j == $keyLen) {
                $j = 0;
            }
            $ordKey = ord(substr($key, $j, 1));
            $j++;
            $crypttext .= strrev(base_convert(dechex($ordStr + $ordKey), 16, 36));
        }

        return $crypttext;
    }
    protected static function decode_item($string)
    {
        //return base64_decode($string);

        if (!$string) {
            return false;
        }

        $key = sha1(env('APP_KEY','abcd123'));
        $strLen = strlen($string);
        $keyLen = strlen($key);
        $j = 0;
        $decrypttext = "";

        for ($i = 0; $i < $strLen; $i += 2) {
            $ordStr = hexdec(base_convert(strrev(substr($string, $i, 2)), 36, 16));
            if ($j == $keyLen) {
                $j = 0;
            }
            $ordKey = ord(substr($key, $j, 1));
            $j++;
            $decrypttext .= chr($ordStr - $ordKey);
        }

        return $decrypttext;
    }
}