rad-webhook-demo.php

<?php
/*
Plugin Name: Rad Webhook Demo
Plugin URI: <https://vrhermit.com/?p=4154>
Description: Adds custom WP JSON endpoints that use the FileMaker OData API to submit form data to FileMaker.
Version: 1.0
Author: radicalappdev
Author URI: <https://radicalappdev.com/>
*/

// --- Boilerplate code ---

// Activation function
function rad_webhook_demo_activate()
{
    // Perform any necessary actions upon activation
}
register_activation_hook(__FILE__, 'rad_webhook_demo_activate');

// Deactivation function
function rad_webhook_demo_deactivate()
{
    // Perform any necessary actions upon deactivation
}
register_deactivation_hook(__FILE__, 'rad_webhook_demo_deactivate');

// HELPER FUNCTIONS
function rad_helper_fmp_to_wp($value)
{
    // Convert FMP line breaks to WP line breaks
    $value = str_replace(["\\r", "\\n"], '<br>', $value);
    return $value;
}

function rad_helper_wp_to_fmp($value)
{
    // Convert WP line breaks to FMP line breaks
    $value = str_replace(['<br>', '<br/>', '<br />'], "\\n", $value);
    return $value;
}

// --- Custom endpoints start here ---

// Create a new endpoint for the wp-json API called rad-webhook-demo
// For example: https://example.com/wp-json/rad-webhook-demo/submit
add_action('rest_api_init', function () {
    register_rest_route('rad-webhook-demo/', '/submit', array(
        'methods' => 'POST',
        'callback' => 'rad_webhook_demo_submit',
    ));
});

// The function that is called when we hit the endpoing `rad_webhook_demo/submit`
function rad_webhook_demo_submit($request)
{
    // Check if the request method is POST
    if (strtolower($_SERVER['REQUEST_METHOD']) !== 'post') {
        wp_send_json_error('Invalid request method', 405);
    }

    // Get the form data
    $form_name = sanitize_text_field($_POST['form_name']);
    $email = sanitize_email($_POST['email']);
    $name = sanitize_text_field($_POST['name']);
    $note = sanitize_text_field($_POST['note']);

    // convert WP line breaks to FMP line breaks
    $note = rad_helper_wp_to_fmp($note);

    // Define an object: fields in FileMaker
    $data = array(
        'form_name' => $form_name,
        'name' => $name,
        'email' => $email,
        'note' => $note
    );

    // Encode the data object as JSON
    $json_data = json_encode($data);

    // Get username and password from plugin settings
    $username = get_option('rad-webhook-demo-username');
    $password = get_option('rad-webhook-demo-password');
    $auth = base64_encode($username . ':' . $password);

    // Execute the API call
    $baseurl = get_option('rad-webhook-demo-baseurl');
    $url = $baseurl . "/FormEntries";
    $response = wp_remote_post($url, array(
        'headers' => array(
            'Content-Type' => 'application/json',
            'Authorization' => 'Basic ' . $auth,
            'Prefer: return=minimal'
        ),
        'body' => $json_data,
    ));

    if (is_wp_error($response)) {
        wp_send_json_error($response->get_error_message(), $response->get_error_code());
    } else {
        $response_body = wp_remote_retrieve_body($response);
        $response_body = rad_helper_fmp_to_wp($response_body);
        $result = json_decode($response_body); // any data transformation can be done here
        wp_send_json($result);
    }
}

// --- Plugin settings page ---

// Add API settings to the database
add_action('admin_init', 'rad_webhook_demo_register_settings');

function rad_webhook_demo_register_settings()
{
    add_option('rad-webhook-demo-username', '');
    add_option('rad-webhook-demo-password', '');
    add_option('rad-webhook-demo-baseurl', '');

    register_setting('rad-webhook-demo-settings', 'rad-webhook-demo-username');
    register_setting('rad-webhook-demo-settings', 'rad-webhook-demo-password');
    register_setting('rad-webhook-demo-settings', 'rad-webhook-demo-baseurl');
}

add_action('admin_menu', 'rad_webhook_demo_add_options_page');

function rad_webhook_demo_add_options_page()
{
    add_options_page(
        'Settings for Rad Webhook Demo',
        'Rad Webhook Demo',
        'manage_options',
        'rad-webhook-demo-settings',
        'rad_webhook_demo_render_options_page'
    );
}

function rad_webhook_demo_render_options_page()
{
?>
    <div class="wrap">
        <h1>Settings for Rad Webhook Demo</h1>
        <form method="post" action="options.php">
            <?php settings_fields('rad-webhook-demo-settings'); ?>
            <?php do_settings_sections('rad-webhook-demo-settings'); ?>
            <p>Enter a FileMaker User account with OData access</p>
            <table class="form-table">
                <tr valign="top">
                    <th scope="row">Username</th>
                    <td><input type="text" name="rad-webhook-demo-username" value="<?php echo esc_attr(get_option('rad-webhook-demo-username')); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row">Password</th>
                    <td><input type="password" name="rad-webhook-demo-password" value="<?php echo esc_attr(get_option('rad-webhook-demo-password')); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row">Base URL</th>
                    <td><input type="text" name="rad-webhook-demo-baseurl" value="<?php echo esc_attr(get_option('rad-webhook-demo-baseurl')); ?>" /></td>
                </tr>
            </table>
            <?php submit_button(); ?>
        </form>
    </div>
<?php
}

add_filter('option_page_capability_rad-webhook-demo-settings', function () {
    return 'manage_options';
});