views/helpers/CalcDonationYearlyText.php

0001 <?php
0002 /**
0003  *  ocs-webserver
0004  *
0005  *  Copyright 2016 by pling GmbH.
0006  *
0007  *    This file is part of ocs-webserver.
0008  *
0009  *    This program is free software: you can redistribute it and/or modify
0010  *    it under the terms of the GNU Affero General Public License as
0011  *    published by the Free Software Foundation, either version 3 of the
0012  *    License, or (at your option) any later version.
0013  *
0014  *    This program is distributed in the hope that it will be useful,
0015  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
0016  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0017  *    GNU Affero General Public License for more details.
0018  *
0019  *    You should have received a copy of the GNU Affero General Public License
0020  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
0021  **/
0022
0023 class Default_View_Helper_CalcDonationYearlyText extends Zend_View_Helper_Abstract
0024 {
0025
0026     const paypal_fix = 0.3;
0027     const paypal_var = 0.029;
0028     const tax = 0.19;
0029
0030     public function calcDonationYearlyText($tier)
0031     {
0032 //($0.99 + 35 cents paypal + 26 cents taxes = $1.60 monthly)
0033     $v = ($tier*12 + self::paypal_fix)/( 1- ( ( self::paypal_var/(1+self::paypal_var)) + (self::tax/(1+self::tax)) ));
0034     $paypal = self::paypal_fix+$v*self::paypal_var;
0035     $total = $tier*12 + $paypal;
0036     $t=$total*self::tax;
0037     $g = $total+$t;
0038         $r = '(12*$'.$tier.' = $'.number_format($tier*12,2).' + $'.number_format($paypal, 2).' paypal + $'.number_format($t, 2).' tax = $'
0039             .number_format($g,2).' yearly)';
0040         return $r;
0041     }
0042
0043 }