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/*
* Copyright (C) 2015 Google Inc. All Rights Reserved.
*
* 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.android.voicemailomtp.sms;
import android.app.PendingIntent;
import android.content.Context;
import android.support.annotation.Nullable;
import android.telecom.PhoneAccountHandle;
import android.telephony.SmsManager;
import android.text.TextUtils;
import com.android.voicemailomtp.OmtpConstants;
/**
* A implementation of the OmtpMessageSender using the standard OMTP sms protocol.
*/
public class OmtpStandardMessageSender extends OmtpMessageSender {
private final String mClientType;
private final String mProtocolVersion;
private final String mClientPrefix;
/**
* Creates a new instance of OmtpStandardMessageSender.
*
* @param applicationPort If set to a value > 0 then a binary sms is sent to this port number.
* Otherwise, a standard text SMS is sent.
* @param destinationNumber Destination number to be used.
* @param clientType The "ct" field to be set in the MO message. This is the value used by the
* VVM server to identify the client. Certain VVM servers require a specific agreed
* value for this field.
* @param protocolVersion OMTP protocol version.
* @param clientPrefix The client prefix requested to be used by the server in its MT messages.
*/
public OmtpStandardMessageSender(Context context, PhoneAccountHandle phoneAccountHandle,
short applicationPort,
String destinationNumber, String clientType, String protocolVersion,
String clientPrefix) {
super(context, phoneAccountHandle, applicationPort, destinationNumber);
mClientType = clientType;
mProtocolVersion = protocolVersion;
mClientPrefix = clientPrefix;
}
// Activate message:
// V1.1: Activate:pv=<value>;ct=<value>
// V1.2: Activate:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
// V1.3: Activate:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
@Override
public void requestVvmActivation(@Nullable PendingIntent sentIntent) {
StringBuilder sb = new StringBuilder().append(OmtpConstants.ACTIVATE_REQUEST);
appendProtocolVersionAndClientType(sb);
if (TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_2) ||
TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_3)) {
appendApplicationPort(sb);
appendClientPrefix(sb);
}
sendSms(sb.toString(), sentIntent);
}
// Deactivate message:
// V1.1: Deactivate:pv=<value>;ct=<string>
// V1.2: Deactivate:pv=<value>;ct=<string>
// V1.3: Deactivate:pv=<value>;ct=<string>
@Override
public void requestVvmDeactivation(@Nullable PendingIntent sentIntent) {
StringBuilder sb = new StringBuilder().append(OmtpConstants.DEACTIVATE_REQUEST);
appendProtocolVersionAndClientType(sb);
sendSms(sb.toString(), sentIntent);
}
// Status message:
// V1.1: STATUS
// V1.2: STATUS
// V1.3: STATUS:pv=<value>;ct=<value>;pt=<value>;<Clientprefix>
@Override
public void requestVvmStatus(@Nullable PendingIntent sentIntent) {
StringBuilder sb = new StringBuilder().append(OmtpConstants.STATUS_REQUEST);
if (TextUtils.equals(mProtocolVersion, OmtpConstants.PROTOCOL_VERSION1_3)) {
appendProtocolVersionAndClientType(sb);
appendApplicationPort(sb);
appendClientPrefix(sb);
}
sendSms(sb.toString(), sentIntent);
}
private void appendProtocolVersionAndClientType(StringBuilder sb) {
sb.append(OmtpConstants.SMS_PREFIX_SEPARATOR);
appendField(sb, OmtpConstants.PROTOCOL_VERSION, mProtocolVersion);
sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
appendField(sb, OmtpConstants.CLIENT_TYPE, mClientType);
}
private void appendApplicationPort(StringBuilder sb) {
sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
appendField(sb, OmtpConstants.APPLICATION_PORT, mApplicationPort);
}
private void appendClientPrefix(StringBuilder sb) {
sb.append(OmtpConstants.SMS_FIELD_SEPARATOR);
sb.append(mClientPrefix);
}
}
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