Snapvalid-wordpress-plugin/snapvalid-email-verification.php at master · unelmacoin/Snapvalid-wordpress-plugin · GitHub

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<?php
/**
 * Plugin Name: SnapValid Email Verification
 * Description: Real-time email validation using SnapValid API.
 * Version: 1.0.0
 * Author: SnapValid
 * Requires at least: 5.0
 * Requires PHP: 7.4
 * License: GPL2+
 */

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

/*
|--------------------------------------------------------------------------
| Constants
|--------------------------------------------------------------------------
*/

define('SNAPVALID_PATH', plugin_dir_path(__FILE__));
define('SNAPVALID_URL', plugin_dir_url(__FILE__));
define('SNAPVALID_VERSION', '1.0.0');


/*
|--------------------------------------------------------------------------
| Includes
|--------------------------------------------------------------------------
*/

require_once SNAPVALID_PATH . 'includes/class-api.php';
require_once SNAPVALID_PATH . 'includes/class-admin.php';
require_once SNAPVALID_PATH . 'includes/class-validation.php';
require_once SNAPVALID_PATH . 'includes/class-cf7.php';


/*
|--------------------------------------------------------------------------
| Initialize Plugin
|--------------------------------------------------------------------------
*/

function snapvalid_init() {
    new SnapValid_Admin();
    new SnapValid_Validation();
    new SnapValid_CF7();
}
add_action('plugins_loaded', 'snapvalid_init');


/*
|--------------------------------------------------------------------------
| AJAX Email Validation (UX Improvement Step 1)
|--------------------------------------------------------------------------
*/

add_action('wp_ajax_snapvalid_check_email', 'snapvalid_check_email');
add_action('wp_ajax_nopriv_snapvalid_check_email', 'snapvalid_check_email');

function snapvalid_check_email() {

    // -----------------------------
    // Security: Verify Nonce
    // -----------------------------
    if (
        !isset($_POST['nonce']) ||
        !wp_verify_nonce($_POST['nonce'], 'snapvalid_nonce')
    ) {
        wp_send_json_error([
            'message' => 'Security check failed'
        ]);
    }

    // -----------------------------
    // Validate Email Input
    // -----------------------------
    if (!isset($_POST['email'])) {
        wp_send_json_error();
    }

    $email = sanitize_email(wp_unslash($_POST['email']));

    if (empty($email) || !is_email($email)) {
        wp_send_json_success([
            'valid' => false,
            'message' => 'Invalid email format'
        ]);
    }

    // -----------------------------
    // If no API key, allow by default
    // -----------------------------
    if (!get_option('snapvalid_api_key')) {
        wp_send_json_success([
            'valid' => true
        ]);
    }

    // -----------------------------
    // Caching (Reduce API Calls)
    // -----------------------------
    $cache_key = 'snapvalid_' . md5($email);

    $cached_result = get_transient($cache_key);

    if ($cached_result !== false) {
        wp_send_json_success([
            'valid' => $cached_result,
            'cached' => true
        ]);
    }

    // -----------------------------
    // Call SnapValid API
    // -----------------------------
    $api = new SnapValid_API();
    $valid = $api->verify_email($email);

    // Fail-safe: if API fails, allow checkout
    if ($valid === null) {
        $valid = true;
    }

    // Store in cache for 1 hour
    set_transient($cache_key, $valid, HOUR_IN_SECONDS);

    wp_send_json_success([
        'valid'  => $valid,
        'cached' => false
    ]);
}

/*
|--------------------------------------------------------------------------
| Enqueue Frontend Script (Checkout Only)
|--------------------------------------------------------------------------
*/

add_action('wp_enqueue_scripts', function () {

    if (!function_exists('is_checkout') || !is_checkout()) {
        return;
    }

    wp_enqueue_script(
        'snapvalid-js',
        SNAPVALID_URL . 'assets/js/snapvalid.js',
        ['jquery'],
        SNAPVALID_VERSION,
        true
    );

    wp_enqueue_style(
        'snapvalid-css',
        SNAPVALID_URL . 'assets/css/snapvalid.css',
        [],
        SNAPVALID_VERSION
    );

    wp_localize_script('snapvalid-js', 'snapvalid_ajax', [
        'ajax_url' => admin_url('admin-ajax.php'),
        'nonce'    => wp_create_nonce('snapvalid_nonce')
    ]);
});

/*
|--------------------------------------------------------------------------
| Enqueue Frontend Script (bulk)
|--------------------------------------------------------------------------
*/

add_action('admin_enqueue_scripts', function($hook){

    if ($hook !== 'snapvalid_page_snapvalid-bulk') {
        return;
    }

    wp_enqueue_script(
        'snapvalid-bulk-js',
        SNAPVALID_URL . 'assets/js/snapvalid-bulk.js',
        ['jquery'],
        '1.0',
        true
    );

    wp_localize_script(
        'snapvalid-bulk-js',
        'snapvalid_ajax',
        [
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce'    => wp_create_nonce('snapvalid_nonce')
        ]
    );
});