1 files changed, 125 insertions, 0 deletions
diff --git a/java/com/android/dialer/notification/DialerNotificationManager.java b/java/com/android/dialer/notification/DialerNotificationManager.java
new file mode 100644
index 000000000..0e3420169
--- /dev/null
+++ b/java/com/android/dialer/notification/DialerNotificationManager.java
@@ -0,0 +1,125 @@
+/*
+ * 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.notification;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.service.notification.StatusBarNotification;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.os.BuildCompat;
+import android.text.TextUtils;
+import android.util.Pair;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+
+/**
+ * Wrapper around the notification manager APIs. The wrapper ensures that channels are set and that
+ * notifications are limited to 10 per group.
+ */
+public final class DialerNotificationManager {
+  public static void notify(@NonNull Context context, int id, @NonNull Notification notification) {
+    Assert.isNotNull(context);
+    Assert.isNotNull(notification);
+    throw Assert.createUnsupportedOperationFailException("all notifications must have tags");
+  }
+
+  public static void notify(
+      @NonNull Context context, @NonNull String tag, int id, @NonNull Notification notification) {
+    Assert.isNotNull(context);
+    Assert.isNotNull(notification);
+    Assert.checkArgument(!TextUtils.isEmpty(tag));
+
+    if (BuildCompat.isAtLeastO()) {
+      Assert.checkArgument(!TextUtils.isEmpty(notification.getChannelId()));
+    }
+
+    getNotificationManager(context).notify(tag, id, notification);
+    NotificationThrottler.throttle(context, notification);
+  }
+
+  public static void cancel(@NonNull Context context, int id) {
+    Assert.isNotNull(context);
+    throw Assert.createUnsupportedOperationFailException(
+        "notification IDs are not unique across the app, a tag must be specified");
+  }
+
+  public static void cancel(@NonNull Context context, @NonNull String tag, int id) {
+    Assert.isNotNull(context);
+    Assert.checkArgument(!TextUtils.isEmpty(tag));
+
+    NotificationManager notificationManager = getNotificationManager(context);
+    StatusBarNotification[] notifications = notificationManager.getActiveNotifications();
+
+    String groupKey = findGroupKey(notifications, tag, id);
+    if (!TextUtils.isEmpty(groupKey)) {
+      Pair<StatusBarNotification, Integer> groupSummaryAndCount =
+          getGroupSummaryAndCount(notifications, groupKey);
+      if (groupSummaryAndCount.first != null && groupSummaryAndCount.second <= 1) {
+        LogUtil.i(
+            "DialerNotificationManager.cancel",
+            "last notification in group (%s) removed, also removing group summary",
+            groupKey);
+        notificationManager.cancel(
+            groupSummaryAndCount.first.getTag(), groupSummaryAndCount.first.getId());
+      }
+    }
+
+    notificationManager.cancel(tag, id);
+  }
+
+  public static StatusBarNotification[] getActiveNotifications(@NonNull Context context) {
+    Assert.isNotNull(context);
+    return getNotificationManager(context).getActiveNotifications();
+  }
+
+  @Nullable
+  private static String findGroupKey(
+      @NonNull StatusBarNotification[] notifications, @NonNull String tag, int id) {
+    for (StatusBarNotification notification : notifications) {
+      if (TextUtils.equals(tag, notification.getTag()) && id == notification.getId()) {
+        return notification.getNotification().getGroup();
+      }
+    }
+    return null;
+  }
+
+  @NonNull
+  private static Pair<StatusBarNotification, Integer> getGroupSummaryAndCount(
+      @NonNull StatusBarNotification[] notifications, @NonNull String groupKey) {
+    StatusBarNotification groupSummaryNotification = null;
+    int groupCount = 0;
+    for (StatusBarNotification notification : notifications) {
+      if (TextUtils.equals(groupKey, notification.getNotification().getGroup())) {
+        if ((notification.getNotification().flags & Notification.FLAG_GROUP_SUMMARY) != 0) {
+          groupSummaryNotification = notification;
+        } else {
+          groupCount++;
+        }
+      }
+    }
+    return new Pair<>(groupSummaryNotification, groupCount);
+  }
+
+  @NonNull
+  private static NotificationManager getNotificationManager(@NonNull Context context) {
+    return context.getSystemService(NotificationManager.class);
+  }
+
+  private DialerNotificationManager() {}
+}