invoiceninja/app/Http/ValidationRules/Payment/ValidRefundableRequest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\ValidationRules\Payment;

use App\Libraries\MultiDB;
use App\Models\Credit;
use App\Models\Invoice;
use App\Models\Payment;
use App\Models\User;
use App\Utils\Traits\MakesHash;
use Illuminate\Contracts\Validation\Rule;

/**
 * Class ValidRefundableRequest
 * @package App\Http\ValidationRules\Payment
 */
class ValidRefundableRequest implements Rule
{
    use MakesHash;

    /**
     * @param string $attribute
     * @param mixed $value
     * @return bool
     */
    private $error_msg;

    private $input;


    public function __construct($input)
    {
        $this->input = $input;
    }

    public function passes($attribute, $value)
    {
        if(!array_key_exists('id', $this->input)){
            $this->error_msg = "Payment `id` required.";
            return false;           
        }

        $payment = Payment::whereId($this->input['id'])->first();

        if (!$payment) {
            $this->error_msg = "Unable to retrieve specified payment";
            return false;
        }

        $request_invoices = request()->has('invoices') ? $this->input['invoices'] : [];
        $request_credits = request()->has('credits') ? $this->input['credits'] : [];

        // foreach($request_invoices as $key => $value)
        //     $request_invoices[$key]['invoice_id'] = $this->decodePrimaryKey($value['invoice_id']);

        // foreach($request_credits as $key => $value)
        //     $request_credits[$key]['credit_id'] = $this->decodePrimaryKey($value['credit_id']);


        if ($payment->invoices()->exists()) {
            foreach ($payment->invoices as $paymentable_invoice) {
                $this->checkInvoice($paymentable_invoice, $request_invoices);
            }
        }

        // if($payment->credits()->exists())
        // {
        //     foreach($payment->credits as $paymentable_credit)
        //         $this->checkCredit($paymentable_credit, $request_credits);
        // }

        foreach ($request_invoices as $request_invoice) {
            $this->checkInvoiceIsPaymentable($request_invoice, $payment);
        }

        // foreach($request_credits as $request_credit)
        //     $this->checkCreditIsPaymentable($request_credit, $payment);

        if (strlen($this->error_msg) > 0) {
            return false;
        }

        return true;
    }

    private function checkInvoiceIsPaymentable($invoice, $payment)
    {
        $invoice = Invoice::whereId($invoice['invoice_id'])->whereCompanyId($payment->company_id)->first();

        if ($payment->invoices()->exists()) {
            $paymentable_invoice = $payment->invoices->where('id', $invoice->id)->first();

            if (!$paymentable_invoice) {
                $this->error_msg = "Invoice id ".$invoice->hashed_id." is not related to this payment";
                return false;
            }
        } else {
            $this->error_msg = "Invoice id ".$invoice->hashed_id." is not related to this payment";
            return false;
        }
    }

    private function checkCreditIsPaymentable($credit, $payment)
    {
        $credit = Credit::whereId($credit['credit_id'])->whereCompanyId($payment->company_id)->first();

        if ($payment->credits()->exists()) {
            $paymentable_credit = $payment->credits->where('id', $credit->id)->first();

            if (!$paymentable_invoice) {
                $this->error_msg = "Credit id ".$credit->hashed_id." is not related to this payment";
                return false;
            }
        } else {
            $this->error_msg = "Credit id ".$credit->hashed_id." is not related to this payment";
            return false;
        }
    }

    private function checkInvoice($paymentable, $request_invoices)
    {
        $record_found = false;

        foreach ($request_invoices as $request_invoice) {
            if ($request_invoice['invoice_id'] == $paymentable->pivot->paymentable_id) {
                $record_found = true;

                $refundable_amount = ($paymentable->pivot->amount - $paymentable->pivot->refunded);

                if ($request_invoice['amount'] > $refundable_amount) {
                    $invoice = $paymentable;

                    $this->error_msg = "Attempting to refund more than allowed for invoice id ".$invoice->hashed_id.", maximum refundable amount is ". $refundable_amount;
                    return false;
                }
            }
        }

        if (!$record_found) {
            $this->error_msg = "Attempting to refund a payment with invoices attached, please specify valid invoice/s to be refunded.";
            return false;
        }
    }


    private function checkCredit($paymentable, $request_credits)
    {
        $record_found = null;

        foreach ($request_credits as $request_credit) {
            if ($request_credit['credit_id'] == $paymentable->pivot->paymentable_id) {
                $record_found = true;

                $refundable_amount = ($paymentable->pivot->amount - $paymentable->pivot->refunded);

                if ($request_credit['amount'] > $refundable_amount) {
                    $credit = $paymentable;

                    $this->error_msg = "Attempting to refund more than allowed for credit ".$credit->number.", maximum refundable amount is ". $refundable_amount;
                    return false;
                }
            }
        }

        if (!$record_found) {
            $this->error_msg = "Attempting to refund a payment with credits attached, please specify valid credit/s to be refunded.";
            return false;
        }
    }

    /**
     * @return string
     */
    public function message()
    {
        return $this->error_msg;
    }
}