Integrasi Payment Gateway Zy-Pay di WordPress

<?php
/**
 * Plugin Name: Zy-Pay QRIS Payment Gateway for WooCommerce
 * Description: Terima pembayaran QRIS otomatis real-time via Zy-Pay Payment Gateway.
 * Version: 1.0.0
 * Author: Zy-Pay / Cutiezy.id
 */

if (!defined('ABSPATH')) exit;

add_action('plugins_loaded', 'init_zypay_qris_gateway');

function init_zypay_qris_gateway() {
    if (!class_exists('WC_Payment_Gateway')) return;

    class WC_Gateway_ZyPay_QRIS extends WC_Payment_Gateway {
        public function __construct() {
            $this->id                 = 'zypay_qris';
            $this->icon               = 'https://cutiezy.id/zy-pay/assets/qris-icon.png';
            $this->has_fields         = false;
            $this->method_title       = 'Zy-Pay QRIS Otomatis';
            $this->method_description = 'Terima pembayaran QRIS otomatis (BCA, Mandiri, BRI, BNI, GoPay, OVO, ShopeePay, DANA).';

            $this->init_form_fields();
            $this->init_settings();

            $this->title       = $this->get_option('title', 'QRIS Otomatis (Instant Payment)');
            $this->description = $this->get_option('description', 'Bayar instan melalui QRIS menggunakan semua e-wallet & mobile banking.');
            $this->api_key     = $this->get_option('api_key');
            $this->expiry      = $this->get_option('expiry', '30');

            add_action('woocommerce_update_options_payment_gateways_' . $this->id, array($this, 'process_admin_options'));
            add_action('woocommerce_api_zypay_webhook', array($this, 'handle_webhook_callback'));
        }

        public function init_form_fields() {
            $this->form_fields = array(
                'enabled' => array(
                    'title'   => 'Aktifkan Gateway',
                    'type'    => 'checkbox',
                    'label'   => 'Aktifkan pembayaran QRIS Zy-Pay',
                    'default' => 'yes'
                ),
                'title' => array(
                    'title'   => 'Judul Pembayaran',
                    'type'    => 'text',
                    'default' => 'QRIS Otomatis (All E-Wallet & Bank)'
                ),
                'description' => array(
                    'title'   => 'Deskripsi',
                    'type'    => 'textarea',
                    'default' => 'Scan QRIS memakai BCA, Mandiri, BRI, DANA, GoPay, OVO, ShopeePay, atau LinkAja.'
                ),
                'api_key' => array(
                    'title'       => 'Zy-Pay API Key',
                    'type'        => 'password',
                    'description' => 'Dapatkan dari Dashboard Zy-Pay → API Keys QRIS.',
                    'default'     => ''
                ),
                'expiry' => array(
                    'title'       => 'Masa Berlaku QRIS (Menit)',
                    'type'        => 'number',
                    'default'     => '30',
                    'description' => 'Durasi waktu pembayaran sebelum kedaluwarsa (default: 30 menit).'
                )
            );
        }

        // Proses Checkout: Redirect pembeli ke Link Pembayaran Zy-Pay
        public function process_payment($order_id) {
            $order = wc_get_order($order_id);
            $apiKey = trim($this->api_key);

            if (empty($apiKey)) {
                wc_add_notice('Konfigurasi pembayaran Zy-Pay belum lengkap (API Key kosong).', 'error');
                return;
            }

            $webhook_url = WC()->api_request_url('zypay_webhook');
            $endpoint    = 'https://cutiezy.id/zy-pay/api/v1/create-payment';

            $body = array(
                'amount'         => (int)round($order->get_total()),
                'description'    => 'Order #' . $order->get_order_number() . ' - ' . $order->get_billing_first_name(),
                'webhook_url'    => $webhook_url,
                'expiry_minutes' => (int)$this->expiry
            );

            $response = wp_remote_post($endpoint, array(
                'headers' => array(
                    'Content-Type' => 'application/json',
                    'X-API-Key'    => $apiKey
                ),
                'body'    => json_encode($body),
                'timeout' => 30
            ));

            if (is_wp_error($response)) {
                wc_add_notice('Koneksi ke gateway pembayaran gagal: ' . $response->get_error_message(), 'error');
                return;
            }

            $result = json_decode(wp_remote_retrieve_body($response), true);

            if (!empty($result['success']) && !empty($result['data']['public_payment_url'])) {
                // Simpan transaksi di post meta
                $order->update_meta_data('_zypay_trx_id', $result['data']['transaction_id']);
                $order->update_meta_data('_zypay_payment_url', $result['data']['public_payment_url']);
                $order->update_status('pending', 'Menunggu pembayaran QRIS Zy-Pay...');
                $order->save();

                WC()->cart->empty_cart();

                // Redirect pembeli ke link pembayaran resmi Zy-Pay
                return array(
                    'result'   => 'success',
                    'redirect' => $result['data']['public_payment_url']
                );
            } else {
                $errMsg = $result['error'] ?? 'Gagal membuat tagihan QRIS.';
                wc_add_notice('Error Pembayaran: ' . $errMsg, 'error');
                return;
            }
        }

        // Webhook Receiver saat QRIS terbayar
        public function handle_webhook_callback() {
            $rawPayload = file_get_contents('php://input');
            $data = json_decode($rawPayload, true);

            if (!$data || empty($data['transaction_id'])) {
                status_header(400);
                echo json_encode(array('status' => 'error', 'message' => 'Payload tidak valid'));
                exit;
            }

            $trxId  = $data['transaction_id'];
            $status = strtolower($data['status'] ?? '');

            // Cari order berdasarkan _zypay_trx_id
            $orders = wc_get_orders(array(
                'meta_key'   => '_zypay_trx_id',
                'meta_value' => $trxId,
                'limit'      => 1
            ));

            if (empty($orders)) {
                status_header(404);
                echo json_encode(array('status' => 'error', 'message' => 'Order tidak ditemukan'));
                exit;
            }

            $order = $orders[0];

            if ($status === 'paid') {
                if (!$order->is_paid()) {
                    $order->payment_complete($trxId);
                    $order->add_order_note('Pembayaran QRIS Zy-Pay berhasil diverifikasi (Status: PAID).');
                }
            } elseif (in_array($status, array('expired', 'cancelled', 'cancel'))) {
                $order->update_status('cancelled', 'Pembayaran QRIS kedaluwarsa atau dibatalkan.');
            }

            status_header(200);
            echo json_encode(array('status' => 'success'));
            exit;
        }
    }

    function add_zypay_qris_gateway($methods) {
        $methods[] = 'WC_Gateway_ZyPay_QRIS';
        return $methods;
    }
    add_filter('woocommerce_payment_gateways', 'add_zypay_qris_gateway');
}
?>

<?php
// Fungsi pembantu membuat tagihan Zy-Pay di WordPress
function buat_tagihan_zypay($nominal, $keterangan, $nama_pembeli = '') {
    $apiKey = 'ak_your_api_key_di_dashboard';
    $url    = 'https://cutiezy.id/zy-pay/api/v1/create-payment';

    $body = array(
        'amount'         => (int)$nominal,
        'description'    => $keterangan . ($nama_pembeli ? " ($nama_pembeli)" : ''),
        'expiry_minutes' => 30,
        'webhook_url'    => home_url('/wp-json/zypay/v1/webhook')
    );

    $response = wp_remote_post($url, array(
        'headers' => array(
            'Content-Type' => 'application/json',
            'X-API-Key'    => $apiKey
        ),
        'body'    => json_encode($body),
        'timeout' => 30
    ));

    if (is_wp_error($response)) {
        return false;
    }

    $json = json_decode(wp_remote_retrieve_body($response), true);
    if (!empty($json['success']) && !empty($json['data']['public_payment_url'])) {
        return $json['data']['public_payment_url']; // Link bayar pembeli
    }

    return false;
}

// Contoh redirect setelah submit form custom:
add_action('wp_ajax_nopriv_proses_bayar_form', 'handler_proses_bayar_form');
add_action('wp_ajax_proses_bayar_form', 'handler_proses_bayar_form');

function handler_proses_bayar_form() {
    $nominal = isset($_POST['nominal']) ? (int)$_POST['nominal'] : 0;
    $nama    = sanitize_text_field($_POST['nama'] ?? '');

    if ($nominal < 1000) {
        wp_send_json_error(array('message' => 'Minimal nominal Rp 1.000'));
    }

    $link_bayar = buat_tagihan_zypay($nominal, 'Pembayaran Form Web', $nama);

    if ($link_bayar) {
        wp_send_json_success(array('redirect_url' => $link_bayar));
    } else {
        wp_send_json_error(array('message' => 'Gagal membuat tagihan pembayaran.'));
    }
}
?>

<?php
// Mendaftarkan endpoint: https://domainanda.com/wp-json/zypay/v1/webhook
add_action('rest_api_init', function () {
    register_rest_route('zypay/v1', '/webhook', array(
        'methods'             => 'POST',
        'callback'            => 'zypay_handle_custom_webhook',
        'permission_callback' => '__return_true'
    ));
});

function zypay_handle_custom_webhook(WP_REST_Request $request) {
    $data = $request->get_json_params();

    if (empty($data) || empty($data['transaction_id'])) {
        return new WP_REST_Response(array('success' => false, 'message' => 'Payload kosong'), 400);
    }

    $trx_id = sanitize_text_field($data['transaction_id']);
    $status = strtolower($data['status'] ?? '');
    $amount = (int)($data['amount'] ?? 0);

    if ($status === 'paid') {
        // Logika bisnis Anda saat lunas:
        // 1. Ubah status order di database
        // 2. Kirim email aktivasi / produk digital ke pembeli
        // 3. Kirim notifikasi WhatsApp ke admin
        error_log("ZYPAY WEBHOOK SUCCESS: Transaksi {$trx_id} telah LUNAS senilai Rp {$amount}");
    }

    return new WP_REST_Response(array('success' => true, 'message' => 'Webhook diterima'), 200);
}
?>