V7.4 : HowTo Formula

[item]

Hi,
how to make formula for V7.4.

Espo\Custom\Resources\metadata/app/formula.json

{
    "functionClassNameMap": {
        "mod97": "Espo\\Custom\\FormulaFunctions\\Mod97"
    },
    "functionList": [
        "__APPEND__",
        {
            "name": "mod97",
            "insertText": "mod97(NUMBER, DOFBIRTH)"
        }
    ]
}​ 

Espo\Custom\FormulaFunctions\Mod97

<?php
namespace Espo\Custom\FormulaFunctions;

use Espo\Core\Formula\EvaluatedArgumentList;
use Espo\Core\Formula\Exceptions\TooFewArguments;
use Espo\Core\Formula\Exceptions\BadArgumentValue;
use Espo\Core\Formula\Func;

use Espo\ORM\Entity;
use Espo\ORM\EntityManager;
use Espo\Core\Utils\Log;

class Mod97 implements Func
{
    public function __construct( EntityManager $entityManager , Log $log)
    {
        $this->em = $entityManager;
        $this->log = $log;
    }

    public function process(EvaluatedArgumentList $arguments): string
    {
        // len 10 + 2
        if (count($arguments) < 2) {
            throw TooFewArguments::create(2);
        }

        $number = $arguments[0];
        if (strlen($number) != 6){
           throw BadArgumentValue::create(1);
        }

        $digitDofbirth = preg_replace("/[^0-9]/", "", $arguments[1]);
        if (strlen($digitDofbirth) != 8){
           throw BadArgumentValue::create(2);
        }
        
        $val = substr(strrev($digitDofbirth), 0, 4);
        $sequence = $number .$val;

        $control = $sequence % 97;
        $check = ($control < 10) ? "0" .$control : strval($control);
        if (intval($check) == 0) {
            $check = "97" ;
        }
        
        return $sequence .$check;
    }
}​

clear cache. (rebuild)

It's certainly better to make as Yuri do, group.

doc : https://docs.espocrm.com/development...func-interface