JezK

Edit File: Stripe_gateway.php

<?php

defined('BASEPATH') or exit('No direct script access allowed');

class Stripe_gateway extends App_gateway
{
    public function __construct()
    {
        /**
        * Call App_gateway __construct function
        */
        parent::__construct();

/**
        * REQUIRED
        * Gateway unique id
        * The ID must be alpha/alphanumeric
        */
        $this->setId('stripe');

/**
         * REQUIRED
         * Gateway name
         */
        $this->setName('Stripe Checkout');

/**
 * Add gateway settings
 */
 $this->setSettings([
 [
 'name' => 'api_secret_key',
 'encrypted' => true,
 'label' => 'settings_paymentmethod_stripe_api_secret_key',
 ],
 [
 'name' => 'api_publishable_key',
 'label' => 'settings_paymentmethod_stripe_api_publishable_key',
 ],
 [
 'name' => 'description_dashboard',
 'label' => 'settings_paymentmethod_description',
 'type' => 'textarea',
 'default_value' => 'Payment for Invoice {invoice_number}',
 ],
 [
 'name' => 'webhook_key',
 'label' => 'Stripe Checkout Webhook Key',
 'default_value' => app_generate_hash(),
 'after' => 'Secret key to protect your webhook, webhook URL: ' . site_url('gateways/stripe/webhook/YOUR_WEBHOOK_KEY [Configure Webhook only if you are using Subscriptions]'),
 'field_attributes' => ['required' => true],
 ],
 [
 'name' => 'currencies',
 'label' => 'settings_paymentmethod_currencies',
 'default_value' => 'USD,CAD',
 ],
 [
 'name' => 'allow_primary_contact_to_update_credit_card',
 'type' => 'yes_no',
 'default_value' => 1,
 'label' => 'allow_primary_contact_to_update_credit_card',
 ],
 [
 'name' => 'test_mode_enabled',
 'type' => 'yes_no',
 'default_value' => 1,
 'label' => 'settings_paymentmethod_testing_mode',
 ],
 ]);
 }

public function process_payment($data)
    {
        $redirectGatewayURI = 'gateways/stripe/make_payment';

$redirectPath = $redirectGatewayURI . '?invoiceid='
        . $data['invoiceid']
        . '&total='
        . $data['amount']
        . '&hash='
        . $data['invoice']->hash;

redirect(site_url($redirectPath));
    }

public function finish_payment($data)
    {
        $this->ci->load->library('stripe_core');

$client           = $this->ci->clients_model->get($data['clientid']);
        $stripeCustomerId = $client->stripe_id;

$charge = [
            'amount'   => strcasecmp($data['currency'], 'JPY') == 0 ? intval($data['amount']) : $data['amount'] * 100,
            'metadata' => [
                'ClientID' => $data['clientid'],
            ],
            'customer'    => $stripeCustomerId,
            'description' => $data['description'],
            'currency'    => $data['currency'],
        ];

// If isset pay with card, process via default source
        // If isset stripeToken but is empty customer, create customer, process payment
        // if isset stripeToken but not empty customer, user entered new card

if (isset($data['pay_with_card'])) {
            // Normal charge from default source
        } elseif (isset($data['stripeToken']) && empty($stripeCustomerId)) {
            $stripeCustomer = $this->ci->stripe_core->create_customer([
                'email'       => $data['email'],
                'source'      => $data['stripeToken'],
                'description' => $client->company,
            ]);

$this->ci->db->where('userid', $client->userid);
            $this->ci->db->update(db_prefix().'clients', ['stripe_id' => $stripeCustomer->id]);
            $charge['customer'] = $stripeCustomer->id;
        } elseif (isset($data['stripeToken']) && !empty($stripeCustomerId)) {
            $stripeCustomer = $this->ci->stripe_core->get_customer($stripeCustomerId);
            $token          = $this->ci->stripe_core->retrieve_token($data['stripeToken']);
            $sourceFound    = false;

foreach ($stripeCustomer->sources->data as $source) {
                if ($source->fingerprint == $token->card->fingerprint) {
                    $sourceFound = $source;

break;
                }
            }

$charge['source'] = !$sourceFound
                ? $stripeCustomer->sources->create(['source' => $data['stripeToken']])
                : $sourceFound;
        }

if (!empty($stripeCustomerId) && isset($data['stripeToken'])) {
            $stripeCustomer = $this->ci->stripe_core->get_customer($stripeCustomerId);
            // Source deleted, expired?
            if (empty($stripeCustomer->default_source)) {
                $stripeCustomer->source = $data['stripeToken'];
                $stripeCustomer->save();
            }
        }

$result = $this->ci->stripe_core->create_charge($charge);

return $result;
    }
}