Add class BatteryLevelData used to parcel the battery timestamps and

levels. It behaves as an interface between UI and data.

Bug: 236101687
Test: make RunSettingsRoboTests
Change-Id: I4f79165125254ce1372abf1a207411a183aabb23

src/com/android/settings/fuelgauge/batteryusage/BatteryLevelData.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 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.settings.fuelgauge.batteryusage;
+
+import android.util.Log;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/** Wraps the battery timestamp and level data used for battery usage chart. */
+public final class BatteryLevelData {
+
+    /** A container for the battery timestamp and level data. */
+    public static final class PeriodBatteryLevelData {
+        private static final String TAG = "PeriodBatteryLevelData";
+
+        private final ImmutableList<Long> mTimestamps;
+        private final ImmutableList<Integer> mLevels;
+
+        public PeriodBatteryLevelData(List<Long> timestamps, List<Integer> levels) {
+            if (timestamps.size() != levels.size()) {
+                Log.e(TAG, "Different sizes of timestamps and levels. Timestamp: "
+                        + timestamps.size() + ", Level: " + levels.size());
+                mTimestamps = ImmutableList.of();
+                mLevels = ImmutableList.of();
+                return;
+            }
+            mTimestamps = ImmutableList.copyOf(timestamps);
+            mLevels = ImmutableList.copyOf(levels);
+        }
+
+        public ImmutableList<Long> getTimestamps() {
+            return mTimestamps;
+        }
+
+        public ImmutableList<Integer> getLevels() {
+            return mLevels;
+        }
+    }
+
+    private final PeriodBatteryLevelData mDailyBatteryLevels;
+    private final ImmutableList<PeriodBatteryLevelData> mHourlyBatteryLevelsPerDay;
+
+    public BatteryLevelData(
+            PeriodBatteryLevelData dailyBatteryLevels,
+            List<PeriodBatteryLevelData> hourlyBatteryLevelsPerDay) {
+        mDailyBatteryLevels = dailyBatteryLevels;
+        mHourlyBatteryLevelsPerDay = ImmutableList.copyOf(hourlyBatteryLevelsPerDay);
+    }
+
+    public PeriodBatteryLevelData getDailyBatteryLevels() {
+        return mDailyBatteryLevels;
+    }
+
+    public ImmutableList<PeriodBatteryLevelData> getHourlyBatteryLevelsPerDay() {
+        return mHourlyBatteryLevelsPerDay;
+    }
+}