1 files changed, 123 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/hint/AnswerHintFactory.java b/java/com/android/incallui/answer/impl/hint/AnswerHintFactory.java
new file mode 100644
index 000000000..77b45ec71
--- /dev/null
+++ b/java/com/android/incallui/answer/impl/hint/AnswerHintFactory.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2016 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.answer.impl.hint;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.annotation.VisibleForTesting;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.ConfigProvider;
+import com.android.dialer.common.ConfigProviderBindings;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.util.DialerUtils;
+import com.android.incallui.util.AccessibilityUtil;
+
+/**
+ * Selects a AnswerHint to show. If there's no suitable hints {@link EmptyAnswerHint} will be used,
+ * which does nothing.
+ */
+public class AnswerHintFactory {
+
+  private static final String CONFIG_ANSWER_HINT_ANSWERED_THRESHOLD_KEY =
+      "answer_hint_answered_threshold";
+  @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+  static final String CONFIG_ANSWER_HINT_WHITELISTED_DEVICES_KEY =
+      "answer_hint_whitelisted_devices";
+  // Most popular devices released before NDR1 is whitelisted. Their user are likely to have seen
+  // the legacy UI.
+  private static final String DEFAULT_WHITELISTED_DEVICES_CSV =
+      "/hammerhead//bullhead//angler//shamu//gm4g//gm4g_s//AQ4501//gce_x86_phone//gm4gtkc_s/"
+          + "/Sparkle_V//Mi-498//AQ4502//imobileiq2//A65//H940//m8_google//m0xx//A10//ctih220/"
+          + "/Mi438S//bacon/";
+
+  @VisibleForTesting
+  static final String ANSWERED_COUNT_PREFERENCE_KEY = "answer_hint_answered_count";
+
+  private final PawImageLoader pawImageLoader;
+
+  public AnswerHintFactory(@NonNull PawImageLoader pawImageLoader) {
+    this.pawImageLoader = Assert.isNotNull(pawImageLoader);
+  }
+
+  @NonNull
+  public AnswerHint create(Context context, long puckUpDuration, long puckUpDelay) {
+
+    if (shouldShowAnswerHint(
+        context,
+        ConfigProviderBindings.get(context),
+        DialerUtils.getDefaultSharedPreferenceForDeviceProtectedStorageContext(context),
+        Build.PRODUCT)) {
+      return new DotAnswerHint(context, puckUpDuration, puckUpDelay);
+    }
+
+    // Display the event answer hint if the payload is available.
+    Drawable eventPayload = pawImageLoader.loadPayload(context);
+    if (eventPayload != null) {
+      return new PawAnswerHint(context, eventPayload, puckUpDuration, puckUpDelay);
+    }
+
+    return new EmptyAnswerHint();
+  }
+
+  public static void increaseAnsweredCount(Context context) {
+    SharedPreferences sharedPreferences =
+        DialerUtils.getDefaultSharedPreferenceForDeviceProtectedStorageContext(context);
+    int answeredCount = sharedPreferences.getInt(ANSWERED_COUNT_PREFERENCE_KEY, 0);
+    sharedPreferences.edit().putInt(ANSWERED_COUNT_PREFERENCE_KEY, answeredCount + 1).apply();
+  }
+
+  @VisibleForTesting
+  static boolean shouldShowAnswerHint(
+      Context context,
+      ConfigProvider configProvider,
+      SharedPreferences sharedPreferences,
+      String device) {
+    if (AccessibilityUtil.isTouchExplorationEnabled(context)) {
+      return false;
+    }
+    // Devices that has the legacy dialer installed are whitelisted as they are likely to go through
+    // a UX change during updates.
+    if (!isDeviceWhitelisted(device, configProvider)) {
+      return false;
+    }
+
+    // If the user has gone through the process a few times we can assume they have learnt the
+    // method.
+    int answeredCount = sharedPreferences.getInt(ANSWERED_COUNT_PREFERENCE_KEY, 0);
+    long threshold = configProvider.getLong(CONFIG_ANSWER_HINT_ANSWERED_THRESHOLD_KEY, 3);
+    LogUtil.i(
+        "AnswerHintFactory.shouldShowAnswerHint",
+        "answerCount: %d, threshold: %d",
+        answeredCount,
+        threshold);
+    return answeredCount < threshold;
+  }
+
+  /**
+   * @param device should be the value of{@link Build#PRODUCT}.
+   * @param configProvider should provide a list of devices quoted with '/' concatenated to a
+   *     string.
+   */
+  private static boolean isDeviceWhitelisted(String device, ConfigProvider configProvider) {
+    return configProvider
+        .getString(CONFIG_ANSWER_HINT_WHITELISTED_DEVICES_KEY, DEFAULT_WHITELISTED_DEVICES_CSV)
+        .contains("/" + device + "/");
+  }
+}