name.herve.gcms.CalendarWrapper.java Source code

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Here is the source code for name.herve.gcms.CalendarWrapper.java

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/*
 * Copyright 2013 Nicolas HERVE.
 * 
 * This file is part of google-calendar-massiveshare
 * 
 * google-calendar-massiveshare is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * google-calendar-massiveshare is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with google-calendar-massiveshare. If not, see <http://www.gnu.org/licenses/>.
 */
package name.herve.gcms;

import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.java6.auth.oauth2.FileCredentialStore;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.extensions.java6.auth.oauth2.GooglePromptReceiver;
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.jackson.JacksonFactory;
import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.CalendarScopes;
import com.google.api.services.calendar.model.Acl;
import com.google.api.services.calendar.model.AclRule;
import com.google.api.services.calendar.model.CalendarList;
import com.google.api.services.calendar.model.CalendarListEntry;

/**
 * @author Nicolas HERVE - n.herve@laposte.net
 */
public class CalendarWrapper {
    private static final String APPLICATION_NAME = "google-calendar-massiveshare";
    private JsonFactory jsonFactory;
    private HttpTransport httpTransport;
    private Calendar client;

    private Credential authorize() throws Exception {
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(jsonFactory,
                new InputStreamReader(getClass().getResourceAsStream("/client_secrets.json")));
        if (clientSecrets.getDetails().getClientId().startsWith("Enter")
                || clientSecrets.getDetails().getClientSecret().startsWith("Enter ")) {
            System.out.println("Enter Client ID and Secret from https://code.google.com/apis/console/?api=plus "
                    + "into plus-cmdline-sample/src/main/resources/client_secrets.json");
            System.exit(1);
        }
        FileCredentialStore credentialStore = new FileCredentialStore(
                new File(System.getProperty("user.home"), ".credentials/calendar.json"), jsonFactory);
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(httpTransport, jsonFactory,
                clientSecrets, Collections.singleton(CalendarScopes.CALENDAR)).setCredentialStore(credentialStore)
                        .build();
        return new AuthorizationCodeInstalledApp(flow, new GooglePromptReceiver()).authorize("user");
    }

    public void init() throws IOException {
        try {
            jsonFactory = new JacksonFactory();
            httpTransport = GoogleNetHttpTransport.newTrustedTransport();
            Credential credential = authorize();
            client = new Calendar.Builder(httpTransport, jsonFactory, credential)
                    .setApplicationName(APPLICATION_NAME).build();
        } catch (GeneralSecurityException e) {
            throw new IOException(e);
        } catch (Exception e) {
            throw new IOException(e);
        }
    }

    public AccessList getAccessList(String calendar) throws IOException {
        AccessList result = new AccessList();

        Acl acls = client.acl().list(calendar).execute();

        for (AclRule r : acls.getItems()) {
            result.set(r.getScope().getValue(), AccessList.Role.valueOf(r.getRole()),
                    AccessList.ScopeType.valueOf(r.getScope().getType()), r.getId());
        }

        return result;
    }

    public void updateAccessList(String calendar, AccessList currentList, AccessList newList, ACLModifier mod)
            throws IOException {
        // delete & update
        for (String email : currentList) {
            if (newList.containsEmail(email)) {
                if (currentList.getRight(email) != newList.getRight(email)
                        || currentList.getType(email) != newList.getType(email)) {
                    mod.update(client, calendar, currentList.getId(email), email, newList.getRight(email),
                            newList.getType(email));
                }
            } else {
                mod.delete(client, calendar, currentList.getId(email));
            }
        }

        // insert
        for (String email : newList) {
            if (!currentList.containsEmail(email)) {
                mod.insert(client, calendar, email, newList.getRight(email), newList.getType(email));
            }
        }
    }

    public List<Map<String, String>> getCalendars() throws IOException {
        ArrayList<Map<String, String>> cals = new ArrayList<Map<String, String>>();

        CalendarList feed = client.calendarList().list().execute();
        if (feed.getItems() != null) {
            for (CalendarListEntry entry : feed.getItems()) {
                String ar = entry.getAccessRole();
                if ((AccessList.Role.owner.toString().equals(ar))
                        || (AccessList.Role.writer.toString().equals(ar))) {
                    Map<String, String> nc = new HashMap<String, String>();
                    nc.put("id", entry.getId());
                    nc.put("summary", entry.getSummary());
                    nc.put("description", entry.getDescription());
                    cals.add(nc);
                }
            }
        }
        return cals;
    }
}