Add the assisted dialing logic module.

This implements the core assisted dialing logic specified in
go/assisted-dialing-dd-v1

Bug: 36414469,63995261
Test: new unit tests
PiperOrigin-RevId: 170232634
Change-Id: I3b668c3a0e9fb5398eca4614548c8141b200e70e

1 files changed, 81 insertions, 0 deletions

diff --git a/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java b/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java
new file mode 100644
index 000000000..2613d07a9
--- /dev/null
+++ b/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java
@@ -0,0 +1,81 @@
+/*
+ * 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.assisteddialing;
+
+import android.annotation.TargetApi;
+import android.os.Build.VERSION_CODES;
+import android.support.annotation.NonNull;
+import com.android.dialer.common.LogUtil;
+import java.util.Optional;
+
+/**
+ * The Mediator for Assisted Dialing.
+ *
+ * <p>This class is responsible for mediating location discovery of the user, determining if the
+ * call is eligible for assisted dialing, and performing the transformation of numbers eligible for
+ * assisted dialing.
+ */
+public final class AssistedDialingMediator {
+
+  private final LocationDetector locationDetector;
+  private final NumberTransformer numberTransformer;
+
+  protected AssistedDialingMediator(
+      @NonNull LocationDetector locationDetector, @NonNull NumberTransformer numberTransformer) {
+    if (locationDetector == null) {
+      throw new NullPointerException("locationDetector was null");
+    }
+
+    if (numberTransformer == null) {
+      throw new NullPointerException("numberTransformer was null");
+    }
+    this.locationDetector = locationDetector;
+    this.numberTransformer = numberTransformer;
+  }
+
+  /**
+   * Returns a boolean for callers to quickly determine whether or not the AssistedDialingMediator
+   * thinks an attempt at assisted dialing is likely to succeed.
+   */
+  public boolean conditionsEligibleForAssistedDialing(
+      @NonNull String numberToCheck,
+      @NonNull String userHomeCountryCode,
+      @NonNull String userRoamingCountryCode) {
+    return numberTransformer.canDoAssistedDialingTransformation(
+        numberToCheck, userHomeCountryCode, userRoamingCountryCode);
+  }
+
+  /**
+   * Returns an Optional of type String containing the transformed number that was provided. The
+   * transformed number should be capable of dialing out of the User's current country and
+   * successfully connecting with a contact in the User's home country.
+   */
+  @SuppressWarnings("AndroidApiChecker") // Use of optional
+  @TargetApi(VERSION_CODES.N)
+  public Optional<String> attemptAssistedDial(@NonNull String numberToTransform) {
+    Optional<String> userHomeCountryCode = locationDetector.getUpperCaseUserHomeCountry();
+    Optional<String> userRoamingCountryCode = locationDetector.getUpperCaseUserRoamingCountry();
+
+    if (!userHomeCountryCode.isPresent() || !userRoamingCountryCode.isPresent()) {
+      LogUtil.i("AssistedDialingMediator.attemptAssistedDial", "Unable to determine country codes");
+      return Optional.empty();
+    }
+
+    return numberTransformer.doAssistedDialingTransformation(
+        numberToTransform, userHomeCountryCode.get(), userRoamingCountryCode.get());
+  }
+}