ajaxpayment.php

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<?php
/* Copyright (C) 2011 Auguria <anthony.poiret@auguria.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

if (!defined('NOREQUIRESOC'))   define('NOREQUIRESOC', '1');
if (!defined('NOCSRFCHECK'))    define('NOCSRFCHECK', '1');
if (!defined('NOTOKENRENEWAL')) define('NOTOKENRENEWAL', '1');
if (!defined('NOREQUIREMENU'))  define('NOREQUIREMENU', '1'); // If there is no menu to show
if (!defined('NOREQUIREHTML'))  define('NOREQUIREHTML', '1'); // If we don't need to load the html.form.class.php

require '../main.inc.php';

$langs->load('compta');


/*
 * View
 */

//init var
$invoice_type = GETPOST('invoice_type', 'int');
$amountPayment = $_POST['amountPayment'];
$amounts = $_POST['amounts']; // from text inputs : invoice amount payment (check required)
$remains = $_POST['remains']; // from dolibarr's object (no need to check)
$currentInvId = $_POST['imgClicked']; // from DOM elements : imgId (equals invoice id)

// Getting the posted keys=>values, sanitize the ones who are from text inputs
$amountPayment = $amountPayment != '' ? (is_numeric(price2num($amountPayment)) ? price2num($amountPayment) : '') : ''; // keep void if not a valid entry

// Clean checkamounts
foreach ($amounts as $key => $value)
{
  $value = price2num($value);
  $amounts[$key] = $value;
  if (empty($value)) unset($amounts[$key]);
}
// Clean remains
foreach ($remains as $key => $value)
{
  $value = price2num($value);
  $remains[$key] = (($invoice_type) == 2 ?-1 : 1) * $value;
  if (empty($value)) unset($remains[$key]);
}

// Treatment
$result = ($amountPayment != '') ? ($amountPayment - array_sum($amounts)) : array_sum($amounts); // Remaining amountPayment
$toJsonArray = array();
$totalRemaining = price2num(array_sum($remains));
$toJsonArray['label'] = $amountPayment == '' ? '' : $langs->transnoentities('RemainingAmountPayment');
if ($currentInvId)                                  // Here to breakdown
{
  // Get the current amount (from form) and the corresponding remainToPay (from invoice)
  $currentAmount = $amounts['amount_'.$currentInvId];
  $currentRemain = $remains['remain_'.$currentInvId];

  // If amountPayment isn't filled, breakdown invoice amount, else breakdown from amountPayment
  if ($amountPayment == '')
  {
    // Check if current amount exists in amounts
    $amountExists = array_key_exists('amount_'.$currentInvId, $amounts);
    if ($amountExists)
    {
      $remainAmount = $currentRemain - $currentAmount; // To keep value between curRemain and curAmount
      $result += $remainAmount; // result must be deduced by
      $currentAmount += $remainAmount; // curAmount put to curRemain
    } else {
      $currentAmount = $currentRemain;
      $result += $currentRemain;
    }
  } else {
    // Reset the substraction for this amount
    $result += price2num($currentAmount);
    $currentAmount = 0;

    if ($result >= 0)     // then we need to calculate the amount to breakdown
    {
      $amountToBreakdown = ($result - $currentRemain >= 0 ?
                    $currentRemain : // Remain can be fully paid
                    $currentRemain + ($result - $currentRemain)); // Remain can only partially be paid
      $currentAmount = $amountToBreakdown; // In both cases, amount will take breakdown value
      $result -= $amountToBreakdown; // And canceled substraction has been replaced by breakdown
    } // else there's no need to calc anything, just reset the field (result is still < 0)
  }
  $toJsonArray['amount_'.$currentInvId] = price2num($currentAmount).""; // Param will exist only if an img has been clicked
}

$toJsonArray['makeRed'] = ($totalRemaining < price2num($result) || price2num($result) < 0) ? true : false;
$toJsonArray['result'] = price($result); // Return value to user format
$toJsonArray['resultnum'] = price2num($result); // Return value to numeric format

// Encode to JSON to return
echo json_encode($toJsonArray); // Printing the call's result