/*
 * Copyright 2020 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.kie.kogito.addon.cloudevents.quarkus;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.inject.Named;

import org.eclipse.microprofile.reactive.messaging.Channel;
import org.eclipse.microprofile.reactive.messaging.Message;
import org.kie.kogito.event.KogitoEventStreams;
import org.reactivestreams.Publisher;

import io.quarkus.runtime.Startup;
import io.smallrye.mutiny.Multi;

/**
 * Takes a @Channel event stream and re-exposes it as a Multi
 * (a subclass of {@link Publisher})
 */
@Startup
@ApplicationScoped
public class QuarkusCloudEventPublisher {
    @Channel(KogitoEventStreams.INCOMING)
    Multi<Message<String>> events;

    @Produces
    @ApplicationScoped
    @Named(KogitoEventStreams.PUBLISHER)
    public Multi<String> makeMulti() {
        return events
                .invoke(Message::ack)
                .map(Message::getPayload)
                .broadcast().toAllSubscribers();
    }
}
