Added PhoneLookupSelector.

This class is responsible for prioritizing and selecting data from a PhoneLookupInfo object, which contains information from many phone lookup sources.

Bug: 34672501
Test: unit
PiperOrigin-RevId: 177893924
Change-Id: Ib98a4656fe87141162a7ac53af4a0ad421196046

2 files changed, 49 insertions, 0 deletions

diff --git a/java/com/android/dialer/phonelookup/PhoneLookupSelector.java b/java/com/android/dialer/phonelookup/PhoneLookupSelector.java
new file mode 100644
index 000000000..a746ea44f
--- /dev/null
+++ b/java/com/android/dialer/phonelookup/PhoneLookupSelector.java
@@ -0,0 +1,47 @@
+/*
+ * 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.phonelookup;
+
+import android.support.annotation.NonNull;
+
+/**
+ * Prioritizes information from a {@link PhoneLookupInfo}.
+ *
+ * <p>For example, a single {@link PhoneLookupInfo} may contain different name information from many
+ * different {@link PhoneLookup} sources. This class defines the rules for deciding which name
+ * should be selected for display to the user, by prioritizing the data from some {@link PhoneLookup
+ * PhoneLookups} over others.
+ *
+ * <p>Note that the logic in this class may be highly coupled with the logic in {@code
+ * CompositePhoneLookup}, because {@code CompositePhoneLookup} may also include prioritization logic
+ * for short-circuiting low-priority {@link PhoneLookup PhoneLookups}.
+ */
+public final class PhoneLookupSelector {
+
+  /**
+   * Select the name associated with this number. Examples of this are a local contact's name or a
+   * business name received from caller ID.
+   */
+  @NonNull
+  public static String selectName(PhoneLookupInfo phoneLookupInfo) {
+    if (phoneLookupInfo.getCp2Info().getCp2ContactInfoCount() > 0) {
+      // Arbitrarily select the first contact's name. In the future, it may make sense to join the
+      // names such as "Mom, Dad" in the case that multiple contacts share the same number.
+      return phoneLookupInfo.getCp2Info().getCp2ContactInfo(0).getName();
+    }
+    return "";
+  }
+}
diff --git a/java/com/android/dialer/phonelookup/composite/CompositePhoneLookup.java b/java/com/android/dialer/phonelookup/composite/CompositePhoneLookup.java
index 520c46f9e..f432e27ae 100644
--- a/java/com/android/dialer/phonelookup/composite/CompositePhoneLookup.java
+++ b/java/com/android/dialer/phonelookup/composite/CompositePhoneLookup.java
@@ -53,6 +53,8 @@ public final class CompositePhoneLookup implements PhoneLookup {
    */
   @Override
   public ListenableFuture<PhoneLookupInfo> lookup(@NonNull Call call) {
+    // TODO(zachh): Add short-circuiting logic so that this call is not blocked on low-priority
+    // lookups finishing when a higher-priority one has already finished.
     List<ListenableFuture<PhoneLookupInfo>> futures = new ArrayList<>();
     for (PhoneLookup phoneLookup : phoneLookups) {
       futures.add(phoneLookup.lookup(call));