.-.-.-.-.-

<?php
namespace App\Helpers;

use App\Models\Setting;
use Illuminate\Support\Facades\Log;

class Paypal{

var $last_error;
    var $ipn_log;
    var $ipn_response;
    var $ipn_data = array();
    var $fields = array();
    var $submit_btn = '';
    var $button_path = '';

function __construct(){

$this->app_name = Setting::get_value("app_name")??'';
        //$payment_settings = get_settings('payment_method',true);
        //$this->system_settings = get_settings('system_settings',true);
        $mode = Setting::get_value("paypal_mode")??'sandbox';
        $this->paypal_url = ($mode == 'sandbox')?'https://www.sandbox.paypal.com/cgi-bin/webscr':'https://www.paypal.com/cgi-bin/webscr';

$this->last_error = '';
        $this->ipn_response = '';

$this->ipn_log = TRUE;

// $this->button_path = $this->CI->config->item('paypal_lib_button_path');

// populate $fields array with a few default values.
        $businessEmail = Setting::get_value("paypal_business_email");
        $currency_code = Setting::get_value("paypal_currency_code");

$this->add_field('business',$businessEmail);
        $this->add_field('rm','2');
        $this->add_field('cmd','_xclick');

$this->add_field('currency_code', $currency_code);
        $this->add_field('quantity', '1');
        $this->button('Pay Now!');
    }

function button($value){
        // changes the default caption of the submit button
        //$this->submit_btn = form_submit('pp_submit', $value, 'class="btn btn-success"');
        $submit_btn = '<input type="submit" name="pp_submit" value="'.$value.'" class="btn btn-success" /><br>';
        $this->submit_btn = $submit_btn;
    }

function image($file){
        $this->submit_btn = '<input type="image" name="add" src="'.url(rtrim($this->button_path, '/').'/'. $file).'" border="0" />';
    }

function add_field($field, $value){
        // adds a key=>value pair to the fields array
        $this->fields[$field] = $value;
    }

function paypal_auto_form(){
        // form with hidden elements which is submitted to paypal
        $this->button("Click here if you're not automatically redirected...");
        //echo $this->paypal_url;die;
        echo '<html><br>';
        echo '<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Processing Payment.. Please wait.. |'. $this->app_name .'</title>
        <link href="'.url('assets/img/favicon.png').'" rel="shortcut icon" type="image/ico" />
        <link href="'.asset('assets/css/bootstrap.css').'" rel="stylesheet" type="text/css" />
        </head>' . "<br>";
        echo '<body style="text-align:center; font-size:2em;" onLoad="document.forms[\'paypal_auto_form\'].submit();">' . "<br>";
        echo '<p style="text-align:center;">Please wait, your order is being processed and you will be redirected to the paypal website.</p><br>';
        echo $this->paypal_form('paypal_auto_form');
        echo '</body></html>';
    }

function paypal_form($form_name='paypal_form'){
        $str = '';
        $str .= '<form method="post" action="'.$this->paypal_url.'" name="'.$form_name.'"/><br>';
        // $str .= '<input type="hidden" name="paymentaction" value="authorization" />';
        //$str .= '<input type="hidden" name="payer_email" value="testing@infinitietech.com" />';
        foreach ($this->fields as $name => $value)
            $str .= '<input type="hidden" name="'.$name.'" value="'.$value.'" />';
        //$str .= '<p><img src="'.url('assets/old-pre-loader.gif').'" alt="Please wait.. Loading" title="Please wait.. Loading.." width="140px" /></p>';
        $str .= '<p>Please wait.. Loading..</p>';
        $str .= '<p>'. $this->submit_btn . '</p>';
        $str .= "</form><br>";

return $str;
    }

function validate_ipn($paypalReturn){
        $ipn_response = $this->curlPost($this->paypal_url, $paypalReturn);

if(preg_match("/VERIFIED/i", $ipn_response)){
            // Valid IPN transaction.
            return true;
        }else{
            // Invalid IPN transaction.  Check the log for details.
            $this->last_error = 'IPN Validation Failed.';
            $this->log_ipn_results(false);
            return false;
        }
    }

function log_ipn_results($success){
        if (!$this->ipn_log) return;  // is logging turned off?

// Timestamp
        $text = '['.date('m/d/Y g:i A').'] - ';

// Success or failure being logged?
        if ($success) $text .= "SUCCESS!\n";
        else $text .= 'FAIL: '.$this->last_error."\n";

// Log the POST variables
        $text .= "IPN POST Vars from Paypal:\n";
        foreach ($this->ipn_data as $key=>$value)
            $text .= "$key=$value, ";

// Log the response from the paypal server
        $text .= "\nIPN Response from Paypal Server:\n ".$this->ipn_response;

// Write to log
        Log::info("IPN LOG : ".$text);
    }

function dump(){
        // Used for debugging, this function will output all the field/value pairs
        ksort($this->fields);
        echo '<h2>ppal->dump() Output:</h2>' . "\n";
        echo '<code style="font: 12px Monaco, \'Courier New\', Verdana, Sans-serif;  background: #f9f9f9; border: 1px solid #D0D0D0; color: #002166; display: block; margin: 14px 0; padding: 12px 10px;">' . "\n";
        foreach ($this->fields as $key => $value) echo '<strong>'. $key .'</strong>:    '. urldecode($value) .'<br/>';
        echo "</code>\n";
    }

function curlPost($paypal_url, $paypal_return_arr){
        $req = 'cmd=_notify-validate';
        foreach($paypal_return_arr as $key => $value){
            $value = urlencode(stripslashes($value));
            $req .= "&$key=$value";
        }

$ipn_site_url = $paypal_url;
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $ipn_site_url);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
        $result = curl_exec($ch);
        curl_close($ch);

return $result;
    }

}

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