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/*
* Copyright (C) 2014 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 android.telecomm.CallInfo;
import com.android.services.telephony.common.Call;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.collect.Maps;
import java.util.Map;
/**
* Translates {@link CallInfo} objects into {@link Call} objects so that call-infos received from
* Telecomm can be used easily with {@link CallList}. Manages Telecomm call ID to {@link Call}
* mappings. This class uses IDs for both {@link Call} objects and {@link CallInfo} objects which
* are both normally referred to as "call id". To distinguish the two, the code and comments refer
* to them as "call ID" and "Telecomm call ID" respectively.
* TODO(santoscordon): This class is a temporary solution until all calls are coming in through
* Telecomm at which point we can rewrite the standard Call object format.
*/
final class CallInfoTranslator {
/**
* Maps String-based Telecomm call IDs to call objects. Entries are added with calls to
* {@link #getCall} and removed with explicit calls to {@link #removeCall}.
*/
private static final Map<String, Call> sCallsById = Maps.newHashMap();
/**
* Stores the next available ID usable by Call objects. IDs start at 100000 and increase by one
* with each use. 100000 is used so as not to conflict with traditional call IDs which start
* at 1. Non-conflict theory based on the notion that a user is highly unlikely to receive
* 100000 more traditional phone calls than those of type CallInfo (from Telecom).
* TODO(santoscordon): Remove this once Telecomm is the only source of phone calls.
*/
private static int sNextAvailableCallId = 100000;
/**
* Performs the translation from a {@link CallInfo} into a {@link Call}. Looks up the Telecomm
* call ID to see if an integer call ID has been assigned. If it has not, then a new call ID
* will be created for the call.
*
* @param callInfo The call-info object from which to create a Call.
*/
static Call getCall(CallInfo callInfo) {
Call call = getCall(callInfo.getId());
if (call == null) {
call = new Call(sNextAvailableCallId++);
}
// TODO(santoscordon): Remove assumption that all calls are dialing by default once
// CallInfo supports Call States
call.setState(Call.State.DIALING);
call.setNumber(callInfo.getHandle());
return call;
}
/**
* Returns the call which maps from the specified Telecomm call ID. If no call was previously
* associated with the specified ID then return null.
*
* @param telecommCallId The Telecomm call ID to map.
* @return The call associated with the specified Telecomm call ID.
*/
static Call getCall(String telecommCallId) {
Preconditions.checkState(!Strings.isNullOrEmpty(telecommCallId));
if (sCallsById.containsKey(telecommCallId)) {
return sCallsById.get(telecommCallId);
}
return null;
}
/**
* Removes the specified Telecomm call ID from the map.
*
* @param telecommCallId The Telecomm call ID to remove.
*/
static void removeCall(String telecommCallId) {
sCallsById.remove(telecommCallId);
}
}
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