SmsSender.java

/**
 * Copyright (C) 2013 Open WhisperSystems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.whispersystems.textsecuregcm.sms;


import com.google.common.base.Optional;
import com.twilio.sdk.TwilioRestException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class SmsSender {

  static final String SMS_VERIFICATION_TEXT = "Your TextSecure verification code: ";
  static final String VOX_VERIFICATION_TEXT = "Your TextSecure verification code is: ";

  private final Logger logger = LoggerFactory.getLogger(SmsSender.class);

  private final TwilioSmsSender          twilioSender;
  private final Optional<NexmoSmsSender> nexmoSender;
  private final boolean                  isTwilioInternational;

  public SmsSender(TwilioSmsSender twilioSender,
                   Optional<NexmoSmsSender> nexmoSender,
                   boolean isTwilioInternational)
  {
    this.isTwilioInternational = isTwilioInternational;
    this.twilioSender          = twilioSender;
    this.nexmoSender           = nexmoSender;
  }

  public void deliverSmsVerification(String destination, String verificationCode)
      throws IOException
  {
    if (!isTwilioDestination(destination) && nexmoSender.isPresent()) {
      nexmoSender.get().deliverSmsVerification(destination, verificationCode);
    } else {
      try {
        twilioSender.deliverSmsVerification(destination, verificationCode);
      } catch (TwilioRestException e) {
        logger.info("Twilio SMS Fallback", e);
        if (nexmoSender.isPresent()) {
          nexmoSender.get().deliverSmsVerification(destination, verificationCode);
        }
      }
    }
  }

  public void deliverVoxVerification(String destination, String verificationCode)
      throws IOException
  {
    if (!isTwilioDestination(destination) && nexmoSender.isPresent()) {
      nexmoSender.get().deliverVoxVerification(destination, verificationCode);
    } else {
      try {
        twilioSender.deliverVoxVerification(destination, verificationCode);
      } catch (TwilioRestException e) {
        logger.info("Twilio Vox Fallback", e);
        if (nexmoSender.isPresent()) {
          nexmoSender.get().deliverVoxVerification(destination, verificationCode);
        }
      }
    }
  }

  private boolean isTwilioDestination(String number) {
    return isTwilioInternational || number.length() == 12 && number.startsWith("+1");
  }
}