io.nonobot.core.client.impl.BotClientImpl.java Source code

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Here is the source code for io.nonobot.core.client.impl.BotClientImpl.java

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/*
 * Copyright 2015 Julien Viet
 *
 * 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 io.nonobot.core.client.impl;

import io.nonobot.core.client.BotClient;
import io.nonobot.core.client.ClientOptions;
import io.nonobot.core.client.ReceiveOptions;
import io.nonobot.core.client.Message;
import io.vertx.core.AsyncResult;
import io.vertx.core.Context;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.Vertx;
import io.vertx.core.eventbus.MessageConsumer;
import io.vertx.core.json.JsonObject;

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author <a href="mailto:julien@julienviet.com">Julien Viet</a>
 */
public class BotClientImpl implements BotClient {

    final String name;
    final Vertx vertx;
    final Context context;
    private volatile Pattern botPattern;
    private final String inboundAddress;
    private final String outboundAddress;
    Handler<Message> messageHandler;
    Handler<Void> closeHandler;

    public BotClientImpl(Vertx vertx, Context context, ClientOptions options,
            Handler<AsyncResult<BotClient>> handler) {

        this.name = options.getName();
        this.inboundAddress = "bots." + name + ".inbound";
        this.outboundAddress = "bots." + name + ".outbound";

        // Default names
        alias(Arrays.asList(name, "@" + name));

        vertx.eventBus().<JsonObject>consumer(outboundAddress, msg -> {
            String chatId = msg.body().getString("chatId");
            String body = msg.body().getString("body");
            handle(new Message() {
                @Override
                public String chatId() {
                    return chatId;
                }

                @Override
                public String body() {
                    return body;
                }
            });
        }).completionHandler(ar -> {
            if (ar.succeeded()) {
                handler.handle(Future.succeededFuture(this));
            } else {
                handler.handle(Future.failedFuture(ar.cause()));
            }
        });

        this.context = context;
        this.vertx = vertx;
    }

    public void handle(Message msg) {
        Handler<Message> handler;
        synchronized (this) {
            handler = messageHandler;
        }
        if (handler != null) {
            context.runOnContext(v -> {
                handler.handle(msg);
            });
        }
    }

    @Override
    public String name() {
        return name;
    }

    @Override
    public Vertx vertx() {
        return vertx;
    }

    @Override
    public void close() {
        Handler<Void> handler;
        synchronized (this) {
            handler = closeHandler;
        }
        if (handler != null) {
            context.runOnContext(v -> {
                closeHandler.handle(null);
            });
        }
    }

    @Override
    public void alias(String name) {
        alias(Collections.singletonList(name));
    }

    @Override
    public void alias(List<String> names) {
        StringBuilder tmp = new StringBuilder("^(?:");
        Iterator<String> it = names.iterator();
        while (it.hasNext()) {
            String name = it.next();
            tmp.append("(?:").append(Pattern.quote(name)).append(")");
            if (it.hasNext()) {
                tmp.append("|");
            }
        }
        tmp.append(")");
        tmp.append("(?:\\s|:)\\s*(.*)");
        botPattern = Pattern.compile(tmp.toString());
    }

    @Override
    public void receiveMessage(ReceiveOptions options, String message, Handler<AsyncResult<String>> replyHandler) {
        String replyAddress = UUID.randomUUID().toString();
        Future<String> reply = Future.future();
        reply.setHandler(replyHandler);
        MessageConsumer<String> consumer = vertx.eventBus().consumer(replyAddress);
        consumer.handler(msg -> {
            String content = msg.body();
            if (content != null && !reply.isComplete()) {
                if (msg.replyAddress() != null) {
                    msg.reply(null);
                }
                reply.complete(content);
                consumer.unregister();
            } else {
                if (msg.replyAddress() != null) {
                    msg.fail(0, "Already replied");
                }
            }
        });
        consumer.completionHandler(ar -> {
            if (ar.succeeded()) {
                Matcher botMatcher = botPattern.matcher(message);
                JsonObject msg = new JsonObject().put("replyAddress", replyAddress);
                msg.put("chatId", options.getChatId());
                if (botMatcher.find()) {
                    msg.put("respond", true);
                    msg.put("content", botMatcher.group(1));
                } else {
                    msg.put("respond", false);
                    msg.put("content", message);
                }
                vertx.eventBus().publish(inboundAddress, msg);
                vertx.setTimer(options.getTimeout(), timerID -> {
                    if (!reply.isComplete()) {
                        consumer.unregister();
                        reply.fail(new Exception("timeout"));
                    }
                });
            } else {
                replyHandler.handle(Future.failedFuture(ar.cause()));
            }
        });
    }

    @Override
    public synchronized BotClient messageHandler(Handler<Message> handler) {
        messageHandler = handler;
        return this;
    }

    @Override
    public synchronized BotClient closeHandler(Handler<Void> handler) {
        closeHandler = handler;
        return this;
    }
}