myCRED: Add Message To Transfers

/**
 * Step 1 : Insert Message Field
 * @since 0.1
 * @version 1.0
 */
add_action( 'mycred_transfer_form_to', 'mycred_pro_transfer_message_field' );
function mycred_pro_transfer_message_field() {
	echo '<label>Message</label><input type="text" name="transfer-message" id="mycred-transfer-message" value="" placeholder="Optional message to recipient" />';
}

/**
 * Step 2 : Replace the Transfer Script
 * @since 0.1
 * @version 1.0
 */
add_action( 'mycred_front_enqueue', 'mycred_pro_adjust_transfer_script', 99 );
function mycred_pro_adjust_transfer_script() {
	wp_deregister_script( 'mycred-transfer-ajax' );
	wp_register_script(
		'mycred-transfer-ajax',
		get_stylesheet_directory_uri() .  '/js/transfer.js',
		array( 'jquery', 'jquery-ui-autocomplete' ),
		myCRED_TRANSFER_VERSION . '.2'
	);
}

/**
 * Step 3 : Add Message
 * @since 0.1
 * @version 1.0
 */
add_filter( 'mycred_add', 'mycred_pro_add_message', 98, 3 );
function mycred_pro_add_message( $reply, $request, $mycred ) {
	if ( $reply === false || $request['ref'] != 'transfer' ) return $reply;

	// If message is set
	if ( isset( $_POST['tmessage'] ) ) {

		// Sanitize things so people dont sent "bad" messages
		$message = sanitize_text_field( $_POST['tmessage'] );

		// Replace our custom template tag with the message
		$log_entry = str_replace( '%message%', $message, $request['entry'] );

		// Update the balance now
		$mycred->update_users_balance( $request['user_id'], $request['amount'] );

		// Add to the log
		$mycred->add_to_log(
			'transfer',
			$request['user_id'],
			$request['amount'],
			$log_entry,
			$request['ref_id'],
			$request['data'],
			$request['type']
		);

		// Tell myCRED not to duplicate this transaction
		// This should be 'done' but due to a 1.3 bug we must return false
		// in order to avoid duplicate entries.
		return false;

	}

	return $reply;
}