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/*
* 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.database;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.SystemClock;
import com.android.dialer.common.LogUtil;
import com.android.dialer.phonelookup.database.contract.PhoneLookupHistoryContract.PhoneLookupHistory;
import java.util.Locale;
/** {@link SQLiteOpenHelper} for the PhoneLookupHistory database. */
class PhoneLookupHistoryDatabaseHelper extends SQLiteOpenHelper {
private final int maxRows;
PhoneLookupHistoryDatabaseHelper(Context appContext, int maxRows) {
super(appContext, "phone_lookup_history.db", null, 1);
this.maxRows = maxRows;
}
private static final String CREATE_TABLE_SQL =
"create table if not exists "
+ PhoneLookupHistory.TABLE
+ " ("
+ (PhoneLookupHistory.NORMALIZED_NUMBER + " text primary key not null, ")
+ (PhoneLookupHistory.PHONE_LOOKUP_INFO + " blob not null, ")
+ (PhoneLookupHistory.LAST_MODIFIED + " long not null")
+ ");";
/** Deletes all but the first maxRows rows (by timestamp) to keep the table a manageable size. */
private static final String CREATE_TRIGGER_SQL =
"create trigger delete_old_rows after insert on "
+ PhoneLookupHistory.TABLE
+ " when (select count(*) from "
+ PhoneLookupHistory.TABLE
+ ") > %d"
+ " begin delete from "
+ PhoneLookupHistory.TABLE
+ " where "
+ PhoneLookupHistory.NORMALIZED_NUMBER
+ " in (select "
+ PhoneLookupHistory.NORMALIZED_NUMBER
+ " from "
+ PhoneLookupHistory.TABLE
+ " order by "
+ PhoneLookupHistory.LAST_MODIFIED
+ " limit (select count(*)-%d"
+ " from "
+ PhoneLookupHistory.TABLE
+ " )); end;";
private static final String CREATE_INDEX_ON_LAST_MODIFIED_SQL =
"create index last_modified_index on "
+ PhoneLookupHistory.TABLE
+ " ("
+ PhoneLookupHistory.LAST_MODIFIED
+ ");";
@Override
public void onCreate(SQLiteDatabase db) {
LogUtil.enterBlock("PhoneLookupHistoryDatabaseHelper.onCreate");
long startTime = SystemClock.uptimeMillis();
db.execSQL(CREATE_TABLE_SQL);
db.execSQL(String.format(Locale.US, CREATE_TRIGGER_SQL, maxRows, maxRows));
db.execSQL(CREATE_INDEX_ON_LAST_MODIFIED_SQL);
// TODO(zachh): Consider logging impression.
LogUtil.i(
"PhoneLookupHistoryDatabaseHelper.onCreate",
"took: %dms",
SystemClock.uptimeMillis() - startTime);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}
}
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