| /* |
| * 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.telecomm; |
| |
| import android.telecomm.CallInfo; |
| import android.telecomm.CallState; |
| |
| import com.android.internal.telecomm.ICallServiceSelector; |
| import com.google.android.collect.Sets; |
| import com.google.common.base.Preconditions; |
| |
| import java.util.Date; |
| import java.util.Locale; |
| import java.util.Set; |
| import java.util.UUID; |
| |
| /** |
| * Encapsulates all aspects of a given phone call throughout its lifecycle, starting |
| * from the time the call intent was received by Telecomm (vs. the time the call was |
| * connected etc). |
| */ |
| final class Call { |
| /** Unique identifier for the call as a UUID string. */ |
| private final String mId; |
| |
| /** Additional contact information beyond handle above, optional. */ |
| private final ContactInfo mContactInfo; |
| |
| /** |
| * The time this call was created, typically also the time this call was added to the set |
| * of pending outgoing calls (mPendingOutgoingCalls) that's maintained by the switchboard. |
| * Beyond logging and such, may also be used for bookkeeping and specifically for marking |
| * certain call attempts as failed attempts. |
| */ |
| private final Date mCreationTime; |
| |
| /** The state of the call. */ |
| private CallState mState; |
| |
| /** The handle with which to establish this call. */ |
| private String mHandle; |
| |
| /** |
| * The call service which is attempted or already connecting this call. |
| */ |
| private CallServiceWrapper mCallService; |
| |
| /** |
| * The call-service selector for this call. |
| * TODO(gilad): Switch to using a wrapper object, see {@link #mCallService}. |
| */ |
| private ICallServiceSelector mCallServiceSelector; |
| |
| /** Read-only and parcelable version of this call. */ |
| private CallInfo mCallInfo; |
| |
| /** |
| * The set of call services that were attempted in the process of placing/switching this call |
| * but turned out unsuitable. Only used in the context of call switching. |
| */ |
| private Set<CallServiceWrapper> mIncompatibleCallServices; |
| |
| /** |
| * Creates an empty call object with a unique call ID. |
| */ |
| Call() { |
| this(null, null); |
| } |
| |
| /** |
| * Persists the specified parameters and initializes the new instance. |
| * |
| * @param handle The handle to dial. |
| * @param contactInfo Information about the entity being called. |
| */ |
| Call(String handle, ContactInfo contactInfo) { |
| mId = UUID.randomUUID().toString(); // UUIDs should provide sufficient uniqueness. |
| mState = CallState.NEW; |
| mHandle = handle; |
| mContactInfo = contactInfo; |
| mCreationTime = new Date(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return String.format(Locale.US, "[%s, %s, %s, %s]", mId, mState, |
| mCallService.getComponentName(), Log.pii(mHandle)); |
| } |
| |
| String getId() { |
| return mId; |
| } |
| |
| CallState getState() { |
| return mState; |
| } |
| |
| /** |
| * Sets the call state. Although there exists the notion of appropriate state transitions |
| * (see {@link CallState}), in practice those expectations break down when cellular systems |
| * misbehave and they do this very often. The result is that we do not enforce state transitions |
| * and instead keep the code resilient to unexpected state changes. |
| */ |
| void setState(CallState state) { |
| mState = state; |
| clearCallInfo(); |
| } |
| |
| String getHandle() { |
| return mHandle; |
| } |
| |
| void setHandle(String handle) { |
| mHandle = handle; |
| } |
| |
| ContactInfo getContactInfo() { |
| return mContactInfo; |
| } |
| |
| /** |
| * @return The "age" of this call object in milliseconds, which typically also represents the |
| * period since this call was added to the set pending outgoing calls, see mCreationTime. |
| */ |
| long getAgeInMilliseconds() { |
| return new Date().getTime() - mCreationTime.getTime(); |
| } |
| |
| /** |
| * @return The time when this call object was created and added to the set of pending outgoing |
| * calls. |
| */ |
| long getCreationTimeInMilliseconds() { |
| return mCreationTime.getTime(); |
| } |
| |
| CallServiceWrapper getCallService() { |
| return mCallService; |
| } |
| |
| void setCallService(CallServiceWrapper callService) { |
| Preconditions.checkNotNull(callService); |
| |
| clearCallService(); |
| |
| callService.incrementAssociatedCallCount(); |
| mCallService = callService; |
| } |
| |
| /** |
| * Clears the associated call service. |
| */ |
| void clearCallService() { |
| if (mCallService != null) { |
| decrementAssociatedCallCount(mCallService); |
| mCallService.cancelOutgoingCall(getId()); |
| mCallService = null; |
| } |
| } |
| |
| void setCallServiceSelector(ICallServiceSelector selector) { |
| Preconditions.checkNotNull(selector); |
| mCallServiceSelector = selector; |
| } |
| |
| void clearCallServiceSelector() { |
| // TODO(gilad): Un-comment once selectors are converted into wrappers. |
| // decrementAssociatedCallCount(mCallServiceSelector); |
| |
| mCallServiceSelector = null; |
| } |
| |
| /** |
| * Adds the specified call service to the list of incompatible services. The set is used when |
| * attempting to switch a phone call between call services such that incompatible services can |
| * be avoided. |
| * |
| * @param callService The incompatible call service. |
| */ |
| void addIncompatibleCallService(CallServiceWrapper callService) { |
| if (mIncompatibleCallServices == null) { |
| mIncompatibleCallServices = Sets.newHashSet(); |
| } |
| mIncompatibleCallServices.add(callService); |
| } |
| |
| /** |
| * Checks whether or not the specified callService was identified as incompatible in the |
| * context of this call. |
| * |
| * @param callService The call service to evaluate. |
| * @return True upon incompatible call services and false otherwise. |
| */ |
| boolean isIncompatibleCallService(CallServiceWrapper callService) { |
| return mIncompatibleCallServices != null && |
| mIncompatibleCallServices.contains(callService); |
| } |
| |
| /** |
| * Aborts ongoing attempts to connect this call. Only applicable to {@link CallState#NEW} |
| * outgoing calls. See {@link #disconnect} for already-connected calls. |
| */ |
| void abort() { |
| if (mState == CallState.NEW) { |
| if (mCallService != null) { |
| mCallService.abort(mId); |
| } |
| clearCallService(); |
| clearCallServiceSelector(); |
| mState = CallState.ABORTED; |
| } |
| } |
| |
| /** |
| * Attempts to disconnect the call through the call service. |
| */ |
| void disconnect() { |
| if (mCallService == null) { |
| Log.w(this, "disconnect() request on a call without a call service."); |
| } else { |
| Log.i(this, "Send disconnect to call service for call with id %s", mId); |
| // The call isn't officially disconnected until the call service confirms that the call |
| // was actually disconnected. Only then is the association between call and call service |
| // severed, see {@link CallsManager#markCallAsDisconnected}. |
| mCallService.disconnect(mId); |
| } |
| } |
| |
| /** |
| * Answers the call if it is ringing. |
| */ |
| void answer() { |
| Preconditions.checkNotNull(mCallService); |
| |
| // Check to verify that the call is still in the ringing state. A call can change states |
| // between the time the user hits 'answer' and Telecomm receives the command. |
| if (isRinging("answer")) { |
| // At this point, we are asking the call service to answer but we don't assume that |
| // it will work. Instead, we wait until confirmation from the call service that the |
| // call is in a non-RINGING state before changing the UI. See |
| // {@link CallServiceAdapter#setActive} and other set* methods. |
| mCallService.answer(mId); |
| } |
| } |
| |
| /** |
| * Rejects the call if it is ringing. |
| */ |
| void reject() { |
| Preconditions.checkNotNull(mCallService); |
| |
| // Check to verify that the call is still in the ringing state. A call can change states |
| // between the time the user hits 'reject' and Telecomm receives the command. |
| if (isRinging("reject")) { |
| mCallService.reject(mId); |
| } |
| } |
| |
| /** |
| * @return An object containing read-only information about this call. |
| */ |
| CallInfo toCallInfo() { |
| if (mCallInfo == null) { |
| mCallInfo = new CallInfo(mId, mState, mHandle); |
| } |
| return mCallInfo; |
| } |
| |
| /** |
| * @return True if the call is ringing, else logs the action name. |
| */ |
| private boolean isRinging(String actionName) { |
| if (mState == CallState.RINGING) { |
| return true; |
| } |
| |
| Log.i(this, "Request to %s a non-ringing call %s", actionName, this); |
| return false; |
| } |
| |
| /** |
| * Resets the cached read-only version of this call. |
| */ |
| private void clearCallInfo() { |
| mCallInfo = null; |
| } |
| |
| @SuppressWarnings("rawtypes") |
| private void decrementAssociatedCallCount(ServiceBinder binder) { |
| if (binder != null) { |
| binder.decrementAssociatedCallCount(); |
| } |
| } |
| } |