org.ado.minesync.translation.drive.DriveClientFactory.java Source code

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Here is the source code for org.ado.minesync.translation.drive.DriveClientFactory.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Andoni del Olmo
 *
 * 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 org.ado.minesync.translation.drive;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
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.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;

import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;

public class DriveClientFactory {

    /**
     * Directory to store user credentials.
     */
    public static final java.io.File DATA_STORE_DIR = Configuration.getConfigFolder();
    private static final String APPLICATION_NAME = "Mine Sync Translation Tool";
    /**
     * Global instance of the JSON factory.
     */
    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
    /**
     * Global instance of the {@link com.google.api.client.util.store.DataStoreFactory}.
     */
    private static FileDataStoreFactory dataStoreFactory;
    /**
     * Global instance of the HTTP transport.
     */
    private static HttpTransport httpTransport;

    /**
     * @return @{Drive}
     * @throws RuntimeException if any error occurred during the creation of Drive client
     */
    public static Drive createDrive() {
        try {
            // initialize the transport
            httpTransport = GoogleNetHttpTransport.newTrustedTransport();

            // initialize the data store factory
            dataStoreFactory = new FileDataStoreFactory(DATA_STORE_DIR);

            // authorization
            Credential credential = authorize();

            // set up global Drive instance
            final Drive client = new Drive.Builder(httpTransport, JSON_FACTORY, credential)
                    .setApplicationName(APPLICATION_NAME).build();
            return client;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Authorizes the installed application to access user's protected data.
     */
    private static Credential authorize() throws Exception {
        // load client secrets
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
                new InputStreamReader(DriveClientFactory.class.getResourceAsStream("/client_secrets.json")));
        if (clientSecrets.getDetails().getClientId().startsWith("Enter")
                || clientSecrets.getDetails().getClientSecret().startsWith("Enter ")) {
            throw new IllegalArgumentException("Invalid client_secrets info");
        }

        Set<String> scopes = new HashSet<String>();
        scopes.add(DriveScopes.DRIVE);
        scopes.add(DriveScopes.DRIVE_APPDATA);
        scopes.add(DriveScopes.DRIVE_FILE);
        scopes.add(DriveScopes.DRIVE_METADATA_READONLY);
        scopes.add(DriveScopes.DRIVE_READONLY);

        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(httpTransport, JSON_FACTORY,
                clientSecrets, scopes).setDataStoreFactory(dataStoreFactory).build();
        // authorize
        return new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
    }
}