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/*
* Copyright (C) 2013 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.incallui;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.common.base.Preconditions;
import android.os.Handler;
import android.os.Message;
import android.telephony.DisconnectCause;
import java.util.HashMap;
import java.util.List;
import java.util.Set;
/**
* Maintains the list of active calls received from CallHandlerService and notifies interested
* classes of changes to the call list as they are received from the telephony stack.
* Primary lister of changes to this class is InCallPresenter.
*/
public class CallList {
private static final int DISCONNECTED_CALL_SHORT_TIMEOUT_MS = 200;
private static final int DISCONNECTED_CALL_MEDIUM_TIMEOUT_MS = 2000;
private static final int DISCONNECTED_CALL_LONG_TIMEOUT_MS = 5000;
private static final int EVENT_DISCONNECTED_TIMEOUT = 1;
private static CallList sInstance = new CallList();
private final HashMap<Integer, Call> mCallMap = Maps.newHashMap();
private final HashMap<Integer, List<String>> mCallTextReponsesMap = Maps.newHashMap();
private final Set<Listener> mListeners = Sets.newHashSet();
private final HashMap<Integer, List<CallUpdateListener>> mCallUpdateListenerMap = Maps
.newHashMap();
/**
* Static singleton accessor method.
*/
public static CallList getInstance() {
return sInstance;
}
/**
* Private constructor. Instance should only be acquired through getInstance().
*/
private CallList() {
}
/**
* Called when a single call disconnects.
*/
public void onDisconnect(Call call) {
Log.d(this, "onDisconnect: ", call);
boolean updated = updateCallInMap(call);
if (updated) {
// notify those listening for changes on this specific change
notifyCallUpdateListeners(call);
// notify those listening for all disconnects
notifyListenersOfDisconnect(call);
}
}
/**
* Called when a single call has changed.
*/
public void onIncoming(Call call, List<String> textMessages) {
Log.d(this, "onIncoming - " + call);
updateCallInMap(call);
updateCallTextMap(call, textMessages);
for (Listener listener : mListeners) {
listener.onIncomingCall(call);
}
}
/**
* Called when a single call has changed.
*/
public void onUpdate(Call call) {
Log.d(this, "onUpdate - ", call);
onUpdateCall(call);
notifyGenericListeners();
}
/**
* Called when multiple calls have changed.
*/
public void onUpdate(List<Call> callsToUpdate) {
Log.d(this, "onUpdate(...)");
Preconditions.checkNotNull(callsToUpdate);
for (Call call : callsToUpdate) {
onUpdateCall(call);
}
notifyGenericListeners();
}
public void notifyCallUpdateListeners(Call call) {
final List<CallUpdateListener> listeners = mCallUpdateListenerMap.get(call.getCallId());
if (listeners != null) {
for (CallUpdateListener listener : listeners) {
listener.onCallStateChanged(call);
}
}
}
/**
* Add a call update listener for a call id.
*
* @param callId The call id to get updates for.
* @param listener The listener to add.
*/
public void addCallUpdateListener(int callId, CallUpdateListener listener) {
List<CallUpdateListener> listeners = mCallUpdateListenerMap.get(callId);
if (listeners == null) {
listeners = Lists.newArrayList();
mCallUpdateListenerMap.put(callId, listeners);
}
listeners.add(listener);
}
/**
* Remove a call update listener for a call id.
*
* @param callId The call id to remove the listener for.
* @param listener The listener to remove.
*/
public void removeCallUpdateListener(int callId, CallUpdateListener listener) {
List<CallUpdateListener> listeners = mCallUpdateListenerMap.get(callId);
if (listeners != null) {
listeners.remove(listener);
}
}
public void addListener(Listener listener) {
Preconditions.checkNotNull(listener);
mListeners.add(listener);
// Let the listener know about the active calls immediately.
listener.onCallListChange(this);
}
public void removeListener(Listener listener) {
Preconditions.checkNotNull(listener);
mListeners.remove(listener);
}
/**
* TODO: Change so that this function is not needed. Instead of assuming there is an active
* call, the code should rely on the status of a specific Call and allow the presenters to
* update the Call object when the active call changes.
*/
public Call getIncomingOrActive() {
Call retval = getIncomingCall();
if (retval == null) {
retval = getActiveCall();
}
return retval;
}
public Call getOutgoingCall() {
Call call = getFirstCallWithState(Call.State.DIALING);
if (call == null) {
call = getFirstCallWithState(Call.State.REDIALING);
}
return call;
}
public Call getActiveCall() {
return getFirstCallWithState(Call.State.ACTIVE);
}
public Call getBackgroundCall() {
return getFirstCallWithState(Call.State.ONHOLD);
}
public Call getDisconnectedCall() {
return getFirstCallWithState(Call.State.DISCONNECTED);
}
public Call getDisconnectingCall() {
return getFirstCallWithState(Call.State.DISCONNECTING);
}
public Call getSecondBackgroundCall() {
return getCallWithState(Call.State.ONHOLD, 1);
}
public Call getActiveOrBackgroundCall() {
Call call = getActiveCall();
if (call == null) {
call = getBackgroundCall();
}
return call;
}
public Call getIncomingCall() {
Call call = getFirstCallWithState(Call.State.INCOMING);
if (call == null) {
call = getFirstCallWithState(Call.State.CALL_WAITING);
}
return call;
}
public Call getFirstCall() {
Call result = getIncomingCall();
if (result == null) {
result = getOutgoingCall();
}
if (result == null) {
result = getFirstCallWithState(Call.State.ACTIVE);
}
if (result == null) {
result = getDisconnectingCall();
}
if (result == null) {
result = getDisconnectedCall();
}
return result;
}
public Call getCall(int callId) {
return mCallMap.get(callId);
}
public Call getCall(String callId) {
for (Call call : mCallMap.values()) {
if (call.getTelecommCallId().equals(callId)) {
return call;
}
}
return null;
}
public boolean existsLiveCall() {
for (Call call : mCallMap.values()) {
if (!isCallDead(call)) {
return true;
}
}
return false;
}
public List<String> getTextResponses(int callId) {
return mCallTextReponsesMap.get(callId);
}
/**
* Returns first call found in the call map with the specified state.
*/
public Call getFirstCallWithState(int state) {
return getCallWithState(state, 0);
}
/**
* Returns the [position]th call found in the call map with the specified state.
* TODO: Improve this logic to sort by call time.
*/
public Call getCallWithState(int state, int positionToFind) {
Call retval = null;
int position = 0;
for (Call call : mCallMap.values()) {
if (call.getState() == state) {
if (position >= positionToFind) {
retval = call;
break;
} else {
position++;
}
}
}
return retval;
}
/**
* This is called when the service disconnects, either expectedly or unexpectedly.
* For the expected case, it's because we have no calls left. For the unexpected case,
* it is likely a crash of phone and we need to clean up our calls manually. Without phone,
* there can be no active calls, so this is relatively safe thing to do.
*/
public void clearOnDisconnect() {
for (Call call : mCallMap.values()) {
final int state = call.getState();
if (state != Call.State.IDLE &&
state != Call.State.INVALID &&
state != Call.State.DISCONNECTED) {
call.setState(Call.State.DISCONNECTED);
call.setDisconnectCause(DisconnectCause.NOT_VALID);
updateCallInMap(call);
}
}
notifyGenericListeners();
}
/**
* Processes an update for a single call.
*
* @param call The call to update.
*/
private void onUpdateCall(Call call) {
Log.d(this, "\t" + call);
updateCallInMap(call);
updateCallTextMap(call, null);
notifyCallUpdateListeners(call);
}
/**
* Sends a generic notification to all listeners that something has changed.
* It is up to the listeners to call back to determine what changed.
*/
private void notifyGenericListeners() {
for (Listener listener : mListeners) {
listener.onCallListChange(this);
}
}
private void notifyListenersOfDisconnect(Call call) {
for (Listener listener : mListeners) {
listener.onDisconnect(call);
}
}
/**
* Updates the call entry in the local map.
* @return false if no call previously existed and no call was added, otherwise true.
*/
private boolean updateCallInMap(Call call) {
Preconditions.checkNotNull(call);
boolean updated = false;
final Integer id = new Integer(call.getCallId());
if (call.getState() == Call.State.DISCONNECTED) {
// update existing (but do not add!!) disconnected calls
if (mCallMap.containsKey(id)) {
// For disconnected calls, we want to keep them alive for a few seconds so that the
// UI has a chance to display anything it needs when a call is disconnected.
// Set up a timer to destroy the call after X seconds.
final Message msg = mHandler.obtainMessage(EVENT_DISCONNECTED_TIMEOUT, call);
mHandler.sendMessageDelayed(msg, getDelayForDisconnect(call));
mCallMap.put(id, call);
updated = true;
}
} else if (!isCallDead(call)) {
mCallMap.put(id, call);
updated = true;
} else if (mCallMap.containsKey(id)) {
mCallMap.remove(id);
updated = true;
}
return updated;
}
private int getDelayForDisconnect(Call call) {
Preconditions.checkState(call.getState() == Call.State.DISCONNECTED);
final int cause = call.getDisconnectCause();
final int delay;
switch (cause) {
case DisconnectCause.LOCAL:
delay = DISCONNECTED_CALL_SHORT_TIMEOUT_MS;
break;
case DisconnectCause.NORMAL:
delay = DISCONNECTED_CALL_MEDIUM_TIMEOUT_MS;
break;
case DisconnectCause.INCOMING_REJECTED:
case DisconnectCause.INCOMING_MISSED:
// no delay for missed/rejected incoming calls
delay = 0;
break;
default:
delay = DISCONNECTED_CALL_LONG_TIMEOUT_MS;
break;
}
return delay;
}
private void updateCallTextMap(Call call, List<String> textResponses) {
Preconditions.checkNotNull(call);
final Integer id = new Integer(call.getCallId());
if (!isCallDead(call)) {
if (textResponses != null) {
mCallTextReponsesMap.put(id, textResponses);
}
} else if (mCallMap.containsKey(id)) {
mCallTextReponsesMap.remove(id);
}
}
private boolean isCallDead(Call call) {
final int state = call.getState();
return Call.State.IDLE == state || Call.State.INVALID == state;
}
/**
* Sets up a call for deletion and notifies listeners of change.
*/
private void finishDisconnectedCall(Call call) {
call.setState(Call.State.IDLE);
updateCallInMap(call);
notifyGenericListeners();
}
/**
* Handles the timeout for destroying disconnected calls.
*/
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case EVENT_DISCONNECTED_TIMEOUT:
Log.d(this, "EVENT_DISCONNECTED_TIMEOUT ", msg.obj);
finishDisconnectedCall((Call) msg.obj);
break;
default:
Log.wtf(this, "Message not expected: " + msg.what);
break;
}
}
};
/**
* Listener interface for any class that wants to be notified of changes
* to the call list.
*/
public interface Listener {
/**
* Called when a new incoming call comes in.
* This is the only method that gets called for incoming calls. Listeners
* that want to perform an action on incoming call should respond in this method
* because {@link #onCallListChange} does not automatically get called for
* incoming calls.
*/
public void onIncomingCall(Call call);
/**
* Called anytime there are changes to the call list. The change can be switching call
* states, updating information, etc. This method will NOT be called for new incoming
* calls and for calls that switch to disconnected state. Listeners must add actions
* to those method implementations if they want to deal with those actions.
*/
public void onCallListChange(CallList callList);
/**
* Called when a call switches to the disconnected state. This is the only method
* that will get called upon disconnection.
*/
public void onDisconnect(Call call);
}
public interface CallUpdateListener {
// TODO: refactor and limit arg to be call state. Caller info is not needed.
public void onCallStateChanged(Call call);
}
}
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