com.github.ithildir.airbot.server.api.ai.ApiAiHandler.java Source code

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Here is the source code for com.github.ithildir.airbot.server.api.ai.ApiAiHandler.java

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/**
 * Copyright (c) 2017 Andrea Di Giorgi
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.github.ithildir.airbot.server.api.ai;

import ai.api.GsonFactory;
import ai.api.model.AIResponse;
import ai.api.model.Fulfillment;
import ai.api.model.Result;

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.logging.Logger;
import io.vertx.core.logging.LoggerFactory;
import io.vertx.ext.web.RoutingContext;

import java.net.HttpURLConnection;

import java.util.HashMap;
import java.util.Map;

/**
 * @author Andrea Di Giorgi
 */
public class ApiAiHandler implements Handler<RoutingContext> {

    public ApiAiHandler(ApiAiFulfillmentBuilder... apiAiFulfillmentBuilders) {
        for (ApiAiFulfillmentBuilder apiAiFulfillmentBuilder : apiAiFulfillmentBuilders) {

            _apiAiFulfillmentBuilders.put(apiAiFulfillmentBuilder.getAction(), apiAiFulfillmentBuilder);
        }
    }

    @Override
    public void handle(RoutingContext routingContext) {
        String json = routingContext.getBodyAsString();

        JsonObject responseJsonObject = (JsonObject) _jsonParser.parse(json);

        AIResponse aiResponse = _gson.fromJson(json, AIResponse.class);

        Result result = aiResponse.getResult();

        String action = result.getAction();

        ApiAiFulfillmentBuilder apiAiFulfillmentBuilder = _apiAiFulfillmentBuilders.get(action);

        Future<Fulfillment> future = apiAiFulfillmentBuilder.build(aiResponse, responseJsonObject);

        HttpServerResponse httpServerResponse = routingContext.response();

        future.setHandler(asyncResult -> {
            if (asyncResult.failed()) {
                _logger.error("Unable to handle API.AI request {0}", asyncResult.cause(), aiResponse);

                routingContext.fail(HttpURLConnection.HTTP_INTERNAL_ERROR);

                return;
            }

            httpServerResponse.end(_gson.toJson(asyncResult.result()));
        });
    }

    private static final Logger _logger = LoggerFactory.getLogger(ApiAiHandler.class);

    private static final Gson _gson;
    private static final JsonParser _jsonParser = new JsonParser();

    static {
        GsonFactory gsonFactory = GsonFactory.getDefaultFactory();

        _gson = gsonFactory.getGson();
    }

    private final Map<String, ApiAiFulfillmentBuilder> _apiAiFulfillmentBuilders = new HashMap<>();

}