net.bis5.slack.command.gcal.AppConfig.java Source code

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Here is the source code for net.bis5.slack.command.gcal.AppConfig.java

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/*
 * @(#) net.bis5.slack.command.gcal.AppConfig
 * Copyright (c) 2016 Maruyama Takayuki <bis5.wsys@gmail.com>
 *
 * 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 net.bis5.slack.command.gcal;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.Objects;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.core.env.Environment;
import org.springframework.util.StringUtils;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.CalendarScopes;

/**
 * TODO ?
 * 
 * @author Maruyama Takayuki <bis5.wsys@gmail.com>
 * @since 2016/12/17
 */
@Configuration
public class AppConfig {
    @Autowired
    Environment env;

    @Bean
    public EmbeddedServletContainerFactory createServletContainerFactory() {
        JettyEmbeddedServletContainerFactory factory = new JettyEmbeddedServletContainerFactory();
        factory.setPort(Integer.valueOf(env.getProperty("PORT", "8000")));
        return factory;
    }

    public String getTargetCalendarId() {
        return Objects.requireNonNull(env.getProperty("CALENDAR_ID"), "env.CALENDAR_ID");
    }

    public JsonFactory jsonFactory() {
        return JacksonFactory.getDefaultInstance();
    }

    public HttpTransport newTransport() {
        try {
            return GoogleNetHttpTransport.newTrustedTransport();
        } catch (GeneralSecurityException | IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Bean
    public Credential loadCredential() throws IOException {
        String clientSectetsJson = env.getProperty("GOOGLE_CLIENT_SECRETS");
        InputStream stream;
        if (StringUtils.isEmpty(clientSectetsJson)) {
            stream = getClass().getClassLoader().getResourceAsStream("client_secret.json");
        } else {
            stream = new ByteArrayInputStream(clientSectetsJson.getBytes());
        }
        return GoogleCredential.fromStream(stream).createScoped(Collections.singleton(CalendarScopes.CALENDAR));
    }

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    @Autowired
    public Calendar createCalendarClient(Credential credential) {
        return new Calendar.Builder(newTransport(), jsonFactory(), credential).build();
    }
}