Contact Form with Recaptcha Plugin

<?php
/**
 * Plugin Name: Contact Form with Conditional Visibility and Recaptcha
 * Description: A simple contact form with conditional visibility and Recaptcha protection.
 * Version: 1.0
 * Author: CodeWP Assistant
 * Author URI: https://codewp.ai
 * Text Domain: codewp
 */

// Define constants for Recaptcha (v2) keys
define('RECAPTCHA_SITE_KEY', 'YourRecaptchaSiteKey');
define('RECAPTCHA_SECRET_KEY', 'YourRecaptchaSecretKey');

add_action("rest_api_init", "cwpai_register_api_hooks");
function cwpai_register_api_hooks() {
    register_rest_route("cwpai/v1", "/submit-form/", ["methods" => "POST", "callback" => "cwpai_submit_form", "permission_callback" => "__return_true", ]);
}

function cwpai_submit_form(WP_REST_Request $request) {
    // Nonce verification
    $nonce = $request->get_header("X-WP-Nonce");
    if (!wp_verify_nonce($nonce, "wp_rest")) {
        return new WP_Error("rest_forbidden", esc_html__("You do not have permissions to access this service.", "codewp"), ["status" => rest_authorization_required_code() ]);
    }
    // Sanitize input
    $name = sanitize_text_field($request["name"]);
    $contact_type = sanitize_text_field($request["contact_type"]);
    $contact_info = sanitize_text_field($request["contact_info"]);
    $message = sanitize_textarea_field($request["message"]);
    $recaptcha_response = sanitize_text_field($request->get_param("recaptcha"));
    // Recaptcha validation
    $recaptcha_verify = wp_remote_post("https://www.google.com/recaptcha/api/siteverify", ["body" => ["secret" => RECAPTCHA_SECRET_KEY, "response" => $recaptcha_response, ], ]);
    $recaptcha_data = wp_remote_retrieve_body($recaptcha_verify);
    if (is_wp_error($recaptcha_data) || empty($recaptcha_data)) {
        return new WP_Error("recaptcha_error", __("There was a problem verifying the Recaptcha, please try again.", "codewp"), ["status" => 400]);
    }
    $recaptcha_data = json_decode($recaptcha_data);
    if (!$recaptcha_data->success) {
        return new WP_Error("recaptcha_failed", __("Recaptcha verification failed, please try again.", "codewp"), ["status" => 401]);
    }
    // Send email
    $to = get_option("admin_email");
    $subject = "New Contact Form Submission";
    $body = "Name: {$name}\nContact Type: {$contact_type}\nContact Info: {$contact_info}\nMessage: {$message}";
    wp_mail($to, $subject, $body);
    return new WP_REST_Response(["status" => "success", "message" => __("Your message has been successfully sent.", "codewp"), ], 200);
}

add_shortcode("cwpai_contact_form", "cwpai_contact_form_shortcode");

function cwpai_contact_form_shortcode() {
    wp_enqueue_script("jquery");
    wp_enqueue_script("google-recaptcha", "https://www.google.com/recaptcha/api.js");
    // Localize script with nonce for REST API
    wp_localize_script("jquery", "cwpai_settings", ["root" => esc_url_raw(rest_url()), "nonce" => wp_create_nonce("wp_rest"), ]);
    ob_start();
?>
    <form id="cwpai_contact_form">
        <input type="text" name="name" placeholder="<?php _e("Name", "codewp"); ?>" required>
        <input type="radio" name="contact_type" value="phone" checked> <?php _e("Phone", "codewp"); ?>
        <input type="radio" name="contact_type" value="email"> <?php _e("Email", "codewp"); ?>
        <input type="text" name="contact_info" id="contact_info" placeholder="<?php _e("Phone number", "codewp"); ?>" required>
        <textarea name="message" placeholder="<?php _e("Your message", "codewp"); ?>" required></textarea>
        <div class="g-recaptcha" data-sitekey="<?php echo RECAPTCHA_SITE_KEY; ?>"></div>
        <button type="submit"><?php _e("Submit", "codewp"); ?></button>
    </form>

    <script type="text/javascript">
        jQuery(document).ready(function ($) {
            $('#cwpai_contact_form').on('submit', function (e) {
                e.preventDefault();
                var formData = new FormData(this);
                formData.set('name', $('#cwpai_contact_form input[name="name"]').val());
                formData.set('contact_type', $('#cwpai_contact_form input[name="contact_type"]:checked').val());
                formData.set('contact_info', $('#cwpai_contact_form input[name="contact_info"]').val());
                formData.set('message', $('#cwpai_contact_form textarea[name="message"]').val());
                formData.set('recaptcha', grecaptcha.getResponse());

                $.ajax({
                    url: cwpai_settings.root + 'cwpai/v1/submit-form/',
                    method: 'POST',
                    data: formData,
                    contentType: false,
                    processData: false,
                    beforeSend: function (xhr) {
                        xhr.setRequestHeader('X-WP-Nonce', cwpai_settings.nonce);
                    },
                    success: function (response) {
                        alert(response.message);
                        if (response.status === 'success') {
                            $('#cwpai_contact_form')[0].reset();
                            grecaptcha.reset();
                        }
                    },
                    error: function (response) {
                        alert(response.responseJSON.message);
                    }
                });
            });
        });
    </script>
    <?php return ob_get_clean();
}