app/src/main/java/net/ktnx/mobileledger/db/DB.java

   1 /*
   2  * Copyright © 2021 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.db;
  19
  20 import android.content.res.Resources;
  21 import android.database.Cursor;
  22 import android.database.SQLException;
  23
  24 import androidx.annotation.NonNull;
  25 import androidx.lifecycle.MutableLiveData;
  26 import androidx.room.Database;
  27 import androidx.room.Room;
  28 import androidx.room.RoomDatabase;
  29 import androidx.room.migration.Migration;
  30 import androidx.sqlite.db.SupportSQLiteDatabase;
  31
  32 import net.ktnx.mobileledger.App;
  33 import net.ktnx.mobileledger.dao.AccountDAO;
  34 import net.ktnx.mobileledger.dao.AccountValueDAO;
  35 import net.ktnx.mobileledger.dao.CurrencyDAO;
  36 import net.ktnx.mobileledger.dao.DescriptionHistoryDAO;
  37 import net.ktnx.mobileledger.dao.OptionDAO;
  38 import net.ktnx.mobileledger.dao.ProfileDAO;
  39 import net.ktnx.mobileledger.dao.TemplateAccountDAO;
  40 import net.ktnx.mobileledger.dao.TemplateHeaderDAO;
  41 import net.ktnx.mobileledger.dao.TransactionAccountDAO;
  42 import net.ktnx.mobileledger.dao.TransactionDAO;
  43 import net.ktnx.mobileledger.utils.Logger;
  44
  45 import java.io.BufferedReader;
  46 import java.io.IOException;
  47 import java.io.InputStream;
  48 import java.io.InputStreamReader;
  49 import java.util.Locale;
  50 import java.util.regex.Matcher;
  51 import java.util.regex.Pattern;
  52
  53 import static net.ktnx.mobileledger.utils.Logger.debug;
  54
  55 @Database(version = DB.REVISION,
  56           entities = {TemplateHeader.class, TemplateAccount.class, Currency.class, Account.class,
  57                       Profile.class, Option.class, AccountValue.class, DescriptionHistory.class,
  58                       Transaction.class, TransactionAccount.class
  59           })
  60 abstract public class DB extends RoomDatabase {
  61     public static final int REVISION = 59;
  62     public static final String DB_NAME = "MoLe.db";
  63     public static final MutableLiveData<Boolean> initComplete = new MutableLiveData<>(false);
  64     private static DB instance;
  65     public static DB get() {
  66         if (instance != null)
  67             return instance;
  68         synchronized (DB.class) {
  69             if (instance != null)
  70                 return instance;
  71
  72             return instance = Room.databaseBuilder(App.instance, DB.class, DB_NAME)
  73                                   .addMigrations(new Migration[]{singleVersionMigration(17),
  74                                                                  singleVersionMigration(18),
  75                                                                  singleVersionMigration(19),
  76                                                                  singleVersionMigration(20),
  77                                                                  multiVersionMigration(20, 22),
  78                                                                  multiVersionMigration(22, 30),
  79                                                                  multiVersionMigration(30, 32),
  80                                                                  multiVersionMigration(32, 34),
  81                                                                  multiVersionMigration(34, 40),
  82                                                                  singleVersionMigration(41),
  83                                                                  multiVersionMigration(41, 58),
  84                                                                  singleVersionMigration(59)
  85                                   })
  86                                   .addCallback(new Callback() {
  87                                       @Override
  88                                       public void onOpen(@NonNull SupportSQLiteDatabase db) {
  89                                           super.onOpen(db);
  90                                           db.execSQL("PRAGMA foreign_keys = ON");
  91                                           db.execSQL("pragma case_sensitive_like=ON;");
  92
  93                                       }
  94                                   })
  95                                   .build();
  96         }
  97     }
  98     private static Migration singleVersionMigration(int toVersion) {
  99         return new Migration(toVersion - 1, toVersion) {
 100             @Override
 101             public void migrate(@NonNull SupportSQLiteDatabase db) {
 102                 String fileName = String.format(Locale.US, "db_%d", toVersion);
 103
 104                 applyRevisionFile(db, fileName);
 105
 106                 // when migrating to version 59, migrate profile/theme options to the
 107                 // SharedPreferences
 108                 if (toVersion == 59) {
 109                     try (Cursor c = db.query(
 110                             "SELECT p.id, p.theme_hue FROM profiles p WHERE p.id=(SELECT o.value " +
 111                             "FROM options WHERE o.profile_uid IS NULL AND o.name=?",
 112                             new Object[]{"profile_id"}))
 113                     {
 114                         if (c.moveToFirst()) {
 115                             long currentProfileId = c.getLong(0);
 116                             int currentTheme = c.getInt(1);
 117
 118                             if (currentProfileId >= 0 && currentTheme >= 0) {
 119                                 App.storeStartupProfileAndTheme(currentProfileId, currentTheme);
 120                             }
 121                         }
 122                     }
 123                 }
 124             }
 125         };
 126     }
 127     private static Migration dummyVersionMigration(int toVersion) {
 128         return new Migration(toVersion - 1, toVersion) {
 129             @Override
 130             public void migrate(@NonNull SupportSQLiteDatabase db) {
 131                 Logger.debug("db",
 132                         String.format(Locale.ROOT, "Dummy DB migration to version %d", toVersion));
 133             }
 134         };
 135     }
 136     private static Migration multiVersionMigration(int fromVersion, int toVersion) {
 137         return new Migration(fromVersion, toVersion) {
 138             @Override
 139             public void migrate(@NonNull SupportSQLiteDatabase db) {
 140                 String fileName = String.format(Locale.US, "db_%d_%d", fromVersion, toVersion);
 141
 142                 applyRevisionFile(db, fileName);
 143             }
 144         };
 145     }
 146     public static void applyRevisionFile(@NonNull SupportSQLiteDatabase db, String fileName) {
 147         final Resources rm = App.instance.getResources();
 148         int res_id = rm.getIdentifier(fileName, "raw", App.instance.getPackageName());
 149         if (res_id == 0)
 150             throw new SQLException(String.format(Locale.US, "No resource for %s", fileName));
 151
 152         try (InputStream res = rm.openRawResource(res_id)) {
 153             debug("db", "Applying " + fileName);
 154             InputStreamReader isr = new InputStreamReader(res);
 155             BufferedReader reader = new BufferedReader(isr);
 156
 157             Pattern endOfStatement = Pattern.compile(";\\s*(?:--.*)?$");
 158
 159             String line;
 160             String sqlStatement = null;
 161             int lineNo = 0;
 162             while ((line = reader.readLine()) != null) {
 163                 lineNo++;
 164                 if (line.startsWith("--"))
 165                     continue;
 166                 if (line.isEmpty())
 167                     continue;
 168
 169                 if (sqlStatement == null)
 170                     sqlStatement = line;
 171                 else
 172                     sqlStatement = sqlStatement.concat(" " + line);
 173
 174                 Matcher m = endOfStatement.matcher(line);
 175                 if (!m.find())
 176                     continue;
 177
 178                 try {
 179                     db.execSQL(sqlStatement);
 180                     sqlStatement = null;
 181                 }
 182                 catch (Exception e) {
 183                     throw new RuntimeException(
 184                             String.format("Error applying %s, line %d, statement: %s", fileName,
 185                                     lineNo, sqlStatement), e);
 186                 }
 187             }
 188
 189             if (sqlStatement != null)
 190                 throw new RuntimeException(String.format(
 191                         "Error applying %s: EOF after continuation. Line %s, Incomplete " +
 192                         "statement: %s", fileName, lineNo, sqlStatement));
 193
 194         }
 195         catch (IOException e) {
 196             throw new RuntimeException(String.format("Error opening raw resource for %s", fileName),
 197                     e);
 198         }
 199     }
 200     public abstract TemplateHeaderDAO getTemplateDAO();
 201
 202     public abstract TemplateAccountDAO getTemplateAccountDAO();
 203
 204     public abstract CurrencyDAO getCurrencyDAO();
 205
 206     public abstract AccountDAO getAccountDAO();
 207
 208     public abstract AccountValueDAO getAccountValueDAO();
 209
 210     public abstract TransactionDAO getTransactionDAO();
 211
 212     public abstract TransactionAccountDAO getTransactionAccountDAO();
 213
 214     public abstract OptionDAO getOptionDAO();
 215
 216     public abstract DescriptionHistoryDAO getDescriptionHistoryDAO();
 217
 218     public abstract ProfileDAO getProfileDAO();
 219 }