com.google.api.services.samples.youtube.cmdline.live.GetLiveChatId.java Source code

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Here is the source code for com.google.api.services.samples.youtube.cmdline.live.GetLiveChatId.java

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/*
 * Copyright (c) 2017 Google Inc.
 *
 * 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 com.google.api.services.samples.youtube.cmdline.live;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.YouTubeScopes;
import com.google.api.services.youtube.model.LiveBroadcast;
import com.google.api.services.youtube.model.LiveBroadcastListResponse;
import com.google.api.services.youtube.model.Video;
import com.google.api.services.youtube.model.VideoListResponse;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.List;

/**
 * Gets a live chat id from a video id or current signed in user.
 *
 * The videoId is often included in the video's url, e.g.:
 * https://www.youtube.com/watch?v=L5Xc93_ZL60
 *                                 ^ videoId
 * The video URL may be found in the browser address bar, or by right-clicking a video and selecting
 * Copy video URL from the context menu.
 *
 * @author Jim Rogers
 */
public class GetLiveChatId {

    /**
     * Define a global instance of a Youtube object, which will be used
     * to make YouTube Data API requests.
     */
    private static YouTube youtube;

    /**
     * Poll live chat messages and SuperChat details from a live broadcast.
     *
     * @param args videoId (optional). If the videoId is given, live chat messages will be retrieved
     * from the chat associated with this video. If the videoId is not specified, the signed in
     * user's current live broadcast will be used instead.
     */
    public static void main(String[] args) {

        // This OAuth 2.0 access scope allows for read-only access to the
        // authenticated user's account, but not other types of account access.
        List<String> scopes = Lists.newArrayList(YouTubeScopes.YOUTUBE_READONLY);

        try {
            // Authorize the request.
            Credential credential = Auth.authorize(scopes, "getlivechatid");

            // This object is used to make YouTube Data API requests.
            youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, credential)
                    .setApplicationName("youtube-cmdline-getlivechatid-sample").build();

            // Get the liveChatId
            String liveChatId = args.length == 1 ? getLiveChatId(youtube, args[0]) : getLiveChatId(youtube);
            if (liveChatId != null) {
                System.out.println("Live chat id: " + liveChatId);
            } else {
                System.err.println("Unable to find a live chat id");
                System.exit(1);
            }
        } catch (GoogleJsonResponseException e) {
            System.err.println("GoogleJsonResponseException code: " + e.getDetails().getCode() + " : "
                    + e.getDetails().getMessage());
            e.printStackTrace();

        } catch (IOException e) {
            System.err.println("IOException: " + e.getMessage());
            e.printStackTrace();
        } catch (Throwable t) {
            System.err.println("Throwable: " + t.getMessage());
            t.printStackTrace();
        }
    }

    /**
     * Retrieves the liveChatId from the authenticated user's live broadcast.
     *
     * @param youtube The object is used to make YouTube Data API requests.
     * @return A liveChatId, or null if not found.
     */
    static String getLiveChatId(YouTube youtube) throws IOException {
        // Get signed in user's liveChatId
        YouTube.LiveBroadcasts.List broadcastList = youtube.liveBroadcasts().list("snippet")
                .setFields("items/snippet/liveChatId").setBroadcastType("all").setBroadcastStatus("active");
        LiveBroadcastListResponse broadcastListResponse = broadcastList.execute();
        for (LiveBroadcast b : broadcastListResponse.getItems()) {
            String liveChatId = b.getSnippet().getLiveChatId();
            if (liveChatId != null && !liveChatId.isEmpty()) {
                return liveChatId;
            }
        }

        return null;
    }

    /**
     * Retrieves the liveChatId from the broadcast associated with a videoId.
     *
     * @param youtube The object is used to make YouTube Data API requests.
     * @param videoId The videoId associated with the live broadcast.
     * @return A liveChatId, or null if not found.
     */
    static String getLiveChatId(YouTube youtube, String videoId) throws IOException {
        // Get liveChatId from the video
        YouTube.Videos.List videoList = youtube.videos().list("liveStreamingDetails")
                .setFields("items/liveStreamingDetails/activeLiveChatId").setId(videoId);
        VideoListResponse response = videoList.execute();
        for (Video v : response.getItems()) {
            String liveChatId = v.getLiveStreamingDetails().getActiveLiveChatId();
            if (liveChatId != null && !liveChatId.isEmpty()) {
                return liveChatId;
            }
        }

        return null;
    }
}