WPFBBotKit

WPFBBotKit provides an easy way for developers to start creating bots with the Facebook Messenger Platform. WPFBBotKit is not a bot itself, but allows you to easily verify and receive webhook requests from the Messenger Platform and send responses from your bot via a simplified API.

Getting Started

1. Download or clone this repo and install via the WordPress plugin installer.
2. Access WPFBBotKit Settings via the "WPFBBotKit" menu option under "Settings" in the wp-admin.
3. Follow the Messenger Platform setup guide to set up your bot using the Webhook URL and Verification String from the WPFBBotKit Settings page.

Usage

Receive messages via the wpfbbk_message_received hook which will provide an instance of WPFBBK_Messaging as its only argument.

add_action( 'wpfbbk_message_received', function( $M ) {
	# bot code here
}, 10, 1 );

When a message has been received, you'll have access to the message's text and/or postback content as well as a few helper functions to help you respond to the message and find out information about the sender.

add_action( 'wpfbbk_message_received', function( $M ) {

	// Retrieve user's info from Facebook API
	$info = $M->get_user_info();
	
	// set fallback since user info is not guaranteed
	$name = $info->first_name ? $info->first_name : 'Human';
	
	if ( ! $M->postback ){
	
		// if no postback  is set, respond to text message
		if ( 'hello' === $M->text || 'hi' === $M->text ) {
			$M->reply_with_text( "Hi $name!", true );
			$M->reply_with_image_url( 'https://media.giphy.com/media/13TXV4kfn7r2iA/giphy.gif' );
		} else {
		
			// reply_with_buttons is one of a few reply helpers provided by `WPFBBK_Messaging`
			$M->reply_with_buttons(
				"Sorry, $name. I don't understand what you said. Do you want me to send you a gif?",
				array(
					array(
						'type'  => 'postback',
						'title' => '👍  Sure.',
						'payload' => 'REPLY_WITH_GIF',
					),
					array(
						'type'  => 'postback',
						'title' => '👎  No, go away.',
						'payload' => 'NO_REPLY',
					),
				)
			);
		}
	} else {
	
		// postback has been received
		if( 'REPLY_WITH_GIF' === $M->postback ) {
			$M->reply_with_image_url( 'https://media.giphy.com/media/13TXV4kfn7r2iA/giphy.gif' );
		}
	}
}, 10, 1 );

Additionally, a wpfbbk_request_received action is fired whenever the webhook url is hit and provides an instance of the WP_REST_Request object for the request.

// debug requests sent to webhook
add_action( 'wpfbbk_request_received', function( $req ) {
   error_log( print_r( $req->get_raw_data(), 1 ) );
}, 10, 1 );

Finally, a wpfbbk_before_send_request filter is applied before sending any request via WPFBBK::api_send() which provides an opportunity to bypass the built-in sending functionality and offload sending API requests to a queue. Documentation for this hook can be found inline in WPFBBK::api_send().

// send requests to queue instead of using WPFBBK::api_send()
apply_filters( 'wpfbbk_before_send_request', function( $request_handled, $method, $url, $data ) {
   if ( ! $request_handled ) {
       $request_handled = SomeOtherClass::queueRequest( $method, $url, $data );
   }
   return $request_handled;
}, 10, 4 );

Requirements

Requires WordPress 4.7 or better since WPFBBotKit utilizes the WordPress Rest API.

License

This project is licensed under the GPL V2 License - see the LICENSE file for details

Credits

WPFBBotKit was created by Jeff Gould from Delicious Brains