com.youtube.indianmovies.data.AddSubscription.java Source code

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Here is the source code for com.youtube.indianmovies.data.AddSubscription.java

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/*
 * Copyright (c) 2013 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.youtube.indianmovies.data;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.youtube.indianmovies.commandline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.ResourceId;
import com.google.api.services.youtube.model.Subscription;
import com.google.api.services.youtube.model.SubscriptionSnippet;
import com.google.common.collect.Lists;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

/**
 * Subscribe a user to a channel using the YouTube Data API (v3). Use
 * OAuth 2.0 for authorization.
 *
 * @author Ibrahim Ulukaya
 */
public class AddSubscription {

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

    /**
     * Subscribe the user's YouTube account to a user-selected channel.
     *
     * @param args command line args (not used).
     */
    public static void main(String[] args) {

        // This OAuth 2.0 access scope allows for full read/write access to the
        // authenticated user's account.
        List<String> scopes = Lists.newArrayList("https://www.googleapis.com/auth/youtube");

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

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

            // We get the user selected channel to subscribe.
            // Retrieve the channel ID that the user is subscribing to.
            String channelId = getChannelId();
            System.out.println("You chose " + channelId + " to subscribe.");

            // Create a resourceId that identifies the channel ID.
            ResourceId resourceId = new ResourceId();
            resourceId.setChannelId(channelId);
            resourceId.setKind("youtube#channel");

            // Create a snippet that contains the resourceId.
            SubscriptionSnippet snippet = new SubscriptionSnippet();
            snippet.setResourceId(resourceId);

            // Create a request to add the subscription and send the request.
            // The request identifies subscription metadata to insert as well
            // as information that the API server should return in its response.
            Subscription subscription = new Subscription();
            subscription.setSnippet(snippet);
            YouTube.Subscriptions.Insert subscriptionInsert = youtube.subscriptions()
                    .insert("snippet,contentDetails", subscription);
            Subscription returnedSubscription = subscriptionInsert.execute();

            // Print information from the API response.
            System.out.println("\n================== Returned Subscription ==================\n");
            System.out.println("  - Id: " + returnedSubscription.getId());
            System.out.println("  - Title: " + returnedSubscription.getSnippet().getTitle());

        } 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();
        }
    }

    /*
     * Prompt the user to enter a channel ID and return it.
     */
    private static String getChannelId() throws IOException {

        String channelId = "";

        System.out.print("Please enter a channel id: ");
        BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
        channelId = bReader.readLine();

        if (channelId.length() < 1) {
            // If nothing is entered, defaults to "YouTube For Developers."
            channelId = "UCtVd0c0tGXuTSbU5d8cSBUg";
        }
        return channelId;
    }
}