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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.android.collect.Lists;
import com.google.android.collect.Maps;
import com.google.android.collect.Sets;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.android.services.telephony.common.Call;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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 Map<Integer, String> STATE_MAP = ImmutableMap.<Integer, String>builder()
.put(Call.State.ACTIVE, "ACTIVE")
.put(Call.State.CALL_WAITING, "CALL_WAITING")
.put(Call.State.DIALING, "DIALING")
.put(Call.State.IDLE, "IDLE")
.put(Call.State.INCOMING, "INCOMING")
.put(Call.State.ONHOLD, "ONHOLD")
.put(Call.State.INVALID, "INVALID")
.build();
private static CallList sInstance;
private final HashMap<Integer, Call> mCallMap = Maps.newHashMap();
private final Set<Listener> mListeners = Sets.newArraySet();
/**
* Static singleton accessor method.
*/
public static synchronized CallList getInstance() {
if (sInstance == null) {
sInstance = new CallList();
}
return sInstance;
}
/**
* Private constructor. Instance should only be acquired through getInstance().
*/
private CallList() {
}
/**
* Called when a single call has changed.
*/
public void onUpdate(Call call) {
Logger.d(this, "onUpdate - " + safeCallString(call));
updateCallInMap(call);
notifyListenersOfChange();
}
/**
* Called when multiple calls have changed.
*/
public void onUpdate(List<Call> callsToUpdate) {
Logger.d(this, "onUpdate(...)");
Preconditions.checkNotNull(callsToUpdate);
for (Call call : callsToUpdate) {
Logger.d(this, "\t" + safeCallString(call));
updateCallInMap(call);
}
notifyListenersOfChange();
}
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(klp): 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 getActiveCall() {
return getFirstCallWithState(Call.State.ACTIVE);
}
public Call getBackgroundCall() {
return getFirstCallWithState(Call.State.ONHOLD);
}
public Call getIncomingCall() {
return getFirstCallWithState(Call.State.INCOMING);
}
public boolean existsLiveCall() {
for (Call call : mCallMap.values()) {
if (!isCallDead(call)) {
return true;
}
}
return false;
}
/**
* Returns first call found in the call map with the specified state.
*/
public Call getFirstCallWithState(int state) {
Call retval = null;
for (Call call : mCallMap.values()) {
if (call.getState() == state) {
retval = call;
break;
}
}
Logger.d(this, "Found " + (retval == null ? "no " : "") + "call with state: " +
STATE_MAP.get(state));
return retval;
}
/**
* 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 notifyListenersOfChange() {
for (Listener listener : mListeners) {
listener.onCallListChange(this);
}
}
private void updateCallInMap(Call call) {
Preconditions.checkNotNull(call);
final Integer id = new Integer(call.getCallId());
if (!isCallDead(call)) {
mCallMap.put(id, call);
} else if (mCallMap.containsKey(id)) {
mCallMap.remove(id);
}
}
private boolean isCallDead(Call call) {
final int state = call.getState();
return Call.State.IDLE == state || Call.State.INVALID == state;
}
/**
* Creates a log-safe string for call objects.
*/
private String safeCallString(Call call) {
final StringBuffer buffer = new StringBuffer();
buffer.append("Call (")
.append(call.getCallId())
.append("), ")
.append(STATE_MAP.get(call.getState()));
return buffer.toString();
}
/**
* Listener interface for any class that wants to be notified of changes
* to the call list.
*/
public interface Listener {
public void onCallListChange(CallList callList);
}
}
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