Implement PreCallCoordinator

When the user makes a call, the PreCallCoordinator will get a list of actions to perform from PreCallActionProviderComponent and apply them to the pending CallIntentBuilder, before sending the built intent to telecom

Bug: 64216442
Test: PreCallExecutorImplTest
PiperOrigin-RevId: 174911537
Change-Id: Ide5ec431d4e6e7879fcdfdbbbd7ea5eed9963b2c

1 files changed, 153 insertions, 0 deletions

diff --git a/java/com/android/dialer/precall/impl/PreCallCoordinatorImpl.java b/java/com/android/dialer/precall/impl/PreCallCoordinatorImpl.java
new file mode 100644
index 000000000..25083ef0b
--- /dev/null
+++ b/java/com/android/dialer/precall/impl/PreCallCoordinatorImpl.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2017 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.dialer.precall.impl;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import com.android.dialer.callintent.CallIntentBuilder;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.precall.PreCallAction;
+import com.android.dialer.precall.PreCallComponent;
+import com.android.dialer.precall.PreCallCoordinator;
+import com.android.dialer.telecom.TelecomUtil;
+import com.google.common.collect.ImmutableList;
+
+/**
+ * Implements {@link PreCallCoordinator}. Listens to the life cycle of {@link PreCallActivity} to
+ * save/restore states.
+ */
+public class PreCallCoordinatorImpl implements PreCallCoordinator {
+
+  private static final String SAVED_STATE_CURRENT_ACTION = "current_action";
+
+  static final String EXTRA_CALL_INTENT_BUILDER = "extra_call_intent_builder";
+
+  @NonNull private final Activity activity;
+
+  private CallIntentBuilder builder;
+  private ImmutableList<PreCallAction> actions;
+  private int currentActionIndex = 0;
+  private PreCallAction currentAction;
+  private PendingAction pendingAction;
+  private boolean aborted = false;
+
+  PreCallCoordinatorImpl(@NonNull Activity activity) {
+    this.activity = Assert.isNotNull(activity);
+  }
+
+  void onCreate(Intent intent, @Nullable Bundle savedInstanceState) {
+    LogUtil.enterBlock("PreCallCoordinatorImpl.onCreate");
+    if (savedInstanceState != null) {
+      currentActionIndex = savedInstanceState.getInt(SAVED_STATE_CURRENT_ACTION);
+      builder = Assert.isNotNull(savedInstanceState.getParcelable(EXTRA_CALL_INTENT_BUILDER));
+    } else {
+      builder = Assert.isNotNull(intent.getParcelableExtra(EXTRA_CALL_INTENT_BUILDER));
+    }
+    actions = PreCallComponent.get(activity).getPreCall().getActions();
+  }
+
+  void onRestoreInstanceState(Bundle savedInstanceState) {
+    currentActionIndex = savedInstanceState.getInt(SAVED_STATE_CURRENT_ACTION);
+    builder = savedInstanceState.getParcelable(EXTRA_CALL_INTENT_BUILDER);
+  }
+
+  void onResume() {
+    runNextAction();
+  }
+
+  void onPause() {
+    if (currentAction != null) {
+      currentAction.onDiscard();
+    }
+    currentAction = null;
+  }
+
+  void onSaveInstanceState(Bundle outState) {
+    outState.putInt(SAVED_STATE_CURRENT_ACTION, currentActionIndex);
+    outState.putParcelable(EXTRA_CALL_INTENT_BUILDER, builder);
+  }
+
+  private void runNextAction() {
+    LogUtil.enterBlock("PreCallCoordinatorImpl.runNextAction");
+    Assert.checkArgument(currentAction == null);
+    if (currentActionIndex >= actions.size()) {
+      TelecomUtil.placeCall(activity, builder.build());
+      activity.finish();
+      return;
+    }
+    LogUtil.i("PreCallCoordinatorImpl.runNextAction", "running " + actions.get(currentActionIndex));
+    currentAction = actions.get(currentActionIndex);
+    actions.get(currentActionIndex).run(this);
+    if (pendingAction == null) {
+      onActionFinished();
+    }
+  }
+
+  private void onActionFinished() {
+    LogUtil.enterBlock("PreCallCoordinatorImpl.onActionFinished");
+    Assert.isNotNull(currentAction);
+    currentAction = null;
+    currentActionIndex++;
+    if (!aborted) {
+      runNextAction();
+    } else {
+      activity.finish();
+    }
+  }
+
+  @Override
+  public void abortCall() {
+    Assert.checkState(currentAction != null);
+    aborted = true;
+  }
+
+  @NonNull
+  @Override
+  public CallIntentBuilder getBuilder() {
+    return builder;
+  }
+
+  @NonNull
+  @Override
+  public Activity getActivity() {
+    return activity;
+  }
+
+  @Override
+  @NonNull
+  public PendingAction startPendingAction() {
+    Assert.isMainThread();
+    Assert.isNotNull(currentAction);
+    Assert.checkArgument(pendingAction == null);
+    pendingAction = new PendingActionImpl();
+    return pendingAction;
+  }
+
+  private class PendingActionImpl implements PendingAction {
+
+    @Override
+    public void finish() {
+      Assert.checkArgument(pendingAction == this);
+      pendingAction = null;
+      onActionFinished();
+    }
+  }
+}