Add database to store anomaly data

1. Refactor HighUsageApp to AppInfo so it could be
reused both in dialog and app restriction
2. Add BatteryDatabaseHelper to store the anomaly log

Bug: 70570352
Test: RunSettingsRoboTests

Change-Id: I900cd9746ff7f1e19bd6f3948463588b7cf72b85

src/com/android/settings/fuelgauge/batterytip/BatteryDatabaseManager.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2018 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.batterytip;
+
+import static com.android.settings.fuelgauge.batterytip.AnomalyDatabaseHelper.AnomalyColumns
+        .PACKAGE_NAME;
+import static com.android.settings.fuelgauge.batterytip.AnomalyDatabaseHelper.AnomalyColumns
+        .ANOMALY_TYPE;
+import static com.android.settings.fuelgauge.batterytip.AnomalyDatabaseHelper.AnomalyColumns
+        .TIME_STAMP_MS;
+import static com.android.settings.fuelgauge.batterytip.AnomalyDatabaseHelper.Tables.TABLE_ANOMALY;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Database manager for battery data. Now it only contains anomaly data stored in {@link AppInfo}.
+ */
+public class BatteryDatabaseManager {
+    private final AnomalyDatabaseHelper mDatabaseHelper;
+
+    public BatteryDatabaseManager(Context context) {
+        mDatabaseHelper = AnomalyDatabaseHelper.getInstance(context);
+    }
+
+    /**
+     * Insert an anomaly log to database.
+     *
+     * @param packageName the package name of the app
+     * @param type        the type of the anomaly
+     * @param timestampMs the time when it is happened
+     */
+    public void insertAnomaly(String packageName, int type, long timestampMs) {
+        try (SQLiteDatabase db = mDatabaseHelper.getWritableDatabase()) {
+            ContentValues values = new ContentValues();
+            values.put(PACKAGE_NAME, packageName);
+            values.put(ANOMALY_TYPE, type);
+            values.put(TIME_STAMP_MS, timestampMs);
+
+            db.insert(TABLE_ANOMALY, null, values);
+        }
+    }
+
+    /**
+     * Query all the anomalies that happened after {@code timestampMs}.
+     */
+    public List<AppInfo> queryAllAnomaliesAfter(long timestampMs) {
+        final List<AppInfo> appInfos = new ArrayList<>();
+        try (SQLiteDatabase db = mDatabaseHelper.getReadableDatabase()) {
+            final String[] projection = {PACKAGE_NAME, ANOMALY_TYPE};
+            final String orderBy = AnomalyDatabaseHelper.AnomalyColumns.TIME_STAMP_MS + " DESC";
+
+            try (Cursor cursor = db.query(TABLE_ANOMALY, projection, TIME_STAMP_MS + " > ?",
+                    new String[]{String.valueOf(timestampMs)}, null, null, orderBy)) {
+                while (cursor.moveToNext()) {
+                    AppInfo appInfo = new AppInfo.Builder()
+                            .setPackageName(cursor.getString(cursor.getColumnIndex(PACKAGE_NAME)))
+                            .setAnomalyType(cursor.getInt(cursor.getColumnIndex(ANOMALY_TYPE)))
+                            .build();
+                    appInfos.add(appInfo);
+                }
+            }
+        }
+
+        return appInfos;
+    }
+
+    public void deleteAllAnomaliesBeforeTimeStamp(long timestampMs) {
+        try (SQLiteDatabase db = mDatabaseHelper.getWritableDatabase()) {
+            db.delete(TABLE_ANOMALY, TIME_STAMP_MS + " < ?",
+                    new String[]{String.valueOf(timestampMs)});
+        }
+    }
+}