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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.sync;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.os.Handler;
import android.os.Looper;
import android.support.annotation.CallSuper;
import android.telecom.PhoneAccountHandle;
import com.android.voicemailomtp.OmtpEvents;
import com.android.voicemailomtp.OmtpVvmCarrierConfigHelper;
import com.android.voicemailomtp.TelephonyManagerStub;
import com.android.voicemailomtp.VoicemailStatus;
import com.android.voicemailomtp.VvmLog;
/**
* Base class for network request call backs for visual voicemail syncing with the Imap server. This
* handles retries and network requests.
*/
public abstract class VvmNetworkRequestCallback extends ConnectivityManager.NetworkCallback {
private static final String TAG = "VvmNetworkRequest";
// Timeout used to call ConnectivityManager.requestNetwork
private static final int NETWORK_REQUEST_TIMEOUT_MILLIS = 60 * 1000;
public static final String NETWORK_REQUEST_FAILED_TIMEOUT = "timeout";
public static final String NETWORK_REQUEST_FAILED_LOST = "lost";
protected Context mContext;
protected PhoneAccountHandle mPhoneAccount;
protected NetworkRequest mNetworkRequest;
private ConnectivityManager mConnectivityManager;
private final OmtpVvmCarrierConfigHelper mCarrierConfigHelper;
private final VoicemailStatus.Editor mStatus;
private boolean mRequestSent = false;
private boolean mResultReceived = false;
public VvmNetworkRequestCallback(Context context, PhoneAccountHandle phoneAccount,
VoicemailStatus.Editor status) {
mContext = context;
mPhoneAccount = phoneAccount;
mStatus = status;
mCarrierConfigHelper = new OmtpVvmCarrierConfigHelper(context, mPhoneAccount);
mNetworkRequest = createNetworkRequest();
}
public VvmNetworkRequestCallback(OmtpVvmCarrierConfigHelper config,
PhoneAccountHandle phoneAccount, VoicemailStatus.Editor status) {
mContext = config.getContext();
mPhoneAccount = phoneAccount;
mStatus = status;
mCarrierConfigHelper = config;
mNetworkRequest = createNetworkRequest();
}
public VoicemailStatus.Editor getVoicemailStatusEditor() {
return mStatus;
}
/**
* @return NetworkRequest for a proper transport type. Use only cellular network if the carrier
* requires it. Otherwise use whatever available.
*/
private NetworkRequest createNetworkRequest() {
NetworkRequest.Builder builder = new NetworkRequest.Builder()
.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
if (mCarrierConfigHelper.isCellularDataRequired()) {
VvmLog.d(TAG, "Transport type: CELLULAR");
builder.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
.setNetworkSpecifier(TelephonyManagerStub
.getNetworkSpecifierForPhoneAccountHandle(mContext, mPhoneAccount));
} else {
VvmLog.d(TAG, "Transport type: ANY");
}
return builder.build();
}
public NetworkRequest getNetworkRequest() {
return mNetworkRequest;
}
@Override
@CallSuper
public void onLost(Network network) {
VvmLog.d(TAG, "onLost");
mResultReceived = true;
onFailed(NETWORK_REQUEST_FAILED_LOST);
}
@Override
@CallSuper
public void onAvailable(Network network) {
super.onAvailable(network);
mResultReceived = true;
}
@CallSuper
public void onUnavailable() {
// TODO: b/32637799 this is hidden, do we really need this?
mResultReceived = true;
onFailed(NETWORK_REQUEST_FAILED_TIMEOUT);
}
public void requestNetwork() {
if (mRequestSent == true) {
VvmLog.e(TAG, "requestNetwork() called twice");
return;
}
mRequestSent = true;
getConnectivityManager().requestNetwork(getNetworkRequest(), this);
/**
* Somehow requestNetwork() with timeout doesn't work, and it's a hidden method.
* Implement our own timeout mechanism instead.
*/
Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (mResultReceived == false) {
onFailed(NETWORK_REQUEST_FAILED_TIMEOUT);
}
}
}, NETWORK_REQUEST_TIMEOUT_MILLIS);
}
public void releaseNetwork() {
VvmLog.d(TAG, "releaseNetwork");
getConnectivityManager().unregisterNetworkCallback(this);
}
public ConnectivityManager getConnectivityManager() {
if (mConnectivityManager == null) {
mConnectivityManager = (ConnectivityManager) mContext.getSystemService(
Context.CONNECTIVITY_SERVICE);
}
return mConnectivityManager;
}
@CallSuper
public void onFailed(String reason) {
VvmLog.d(TAG, "onFailed: " + reason);
if (mCarrierConfigHelper.isCellularDataRequired()) {
mCarrierConfigHelper
.handleEvent(mStatus, OmtpEvents.DATA_NO_CONNECTION_CELLULAR_REQUIRED);
} else {
mCarrierConfigHelper.handleEvent(mStatus, OmtpEvents.DATA_NO_CONNECTION);
}
releaseNetwork();
}
}
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