app/src/main/java/net/ktnx/mobileledger/model/Data.java

   1 /*
   2  * Copyright © 2019 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.model;
  19
  20 import android.database.Cursor;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.os.AsyncTask;
  23
  24 import androidx.lifecycle.MutableLiveData;
  25
  26 import net.ktnx.mobileledger.App;
  27 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  28 import net.ktnx.mobileledger.ui.activity.MainActivity;
  29 import net.ktnx.mobileledger.utils.LockHolder;
  30 import net.ktnx.mobileledger.utils.Locker;
  31 import net.ktnx.mobileledger.utils.Logger;
  32 import net.ktnx.mobileledger.utils.MLDB;
  33 import net.ktnx.mobileledger.utils.ObservableList;
  34
  35 import java.lang.ref.WeakReference;
  36 import java.text.NumberFormat;
  37 import java.util.ArrayList;
  38 import java.util.Date;
  39 import java.util.List;
  40 import java.util.Locale;
  41 import java.util.concurrent.atomic.AtomicInteger;
  42
  43 import static net.ktnx.mobileledger.utils.Logger.debug;
  44
  45 public final class Data {
  46     public static ObservableList<TransactionListItem> transactions =
  47             new ObservableList<>(new ArrayList<>());
  48     public static ObservableList<LedgerAccount> accounts = new ObservableList<>(new ArrayList<>());
  49     public static MutableLiveData<Boolean> backgroundTasksRunning = new MutableLiveData<>(false);
  50     public static MutableLiveData<Date> lastUpdateDate = new MutableLiveData<>();
  51     public static MutableLiveData<MobileLedgerProfile> profile = new InertMutableLiveData<>();
  52     public static MutableLiveData<ArrayList<MobileLedgerProfile>> profiles =
  53             new MutableLiveData<>(null);
  54     public static MutableLiveData<String> accountFilter = new MutableLiveData<>();
  55     public static MutableLiveData<Currency.Position> currencySymbolPosition =
  56             new MutableLiveData<>();
  57     public static MutableLiveData<Boolean> currencyGap = new MutableLiveData<>(true);
  58     public static MutableLiveData<Locale> locale = new MutableLiveData<>(Locale.getDefault());
  59     private static AtomicInteger backgroundTaskCount = new AtomicInteger(0);
  60     private static Locker profilesLocker = new Locker();
  61     private static RetrieveTransactionsTask retrieveTransactionsTask;
  62     public static MutableLiveData<Boolean> drawerOpen = new MutableLiveData<>(false);
  63     public static void backgroundTaskStarted() {
  64         int cnt = backgroundTaskCount.incrementAndGet();
  65         debug("data",
  66                 String.format(Locale.ENGLISH, "background task count is %d after incrementing",
  67                         cnt));
  68         backgroundTasksRunning.postValue(cnt > 0);
  69     }
  70     public static void backgroundTaskFinished() {
  71         int cnt = backgroundTaskCount.decrementAndGet();
  72         debug("data",
  73                 String.format(Locale.ENGLISH, "background task count is %d after decrementing",
  74                         cnt));
  75         backgroundTasksRunning.postValue(cnt > 0);
  76     }
  77     public static void setCurrentProfile(MobileLedgerProfile newProfile) {
  78         MLDB.setOption(MLDB.OPT_PROFILE_UUID, (newProfile == null) ? null : newProfile.getUuid());
  79         stopTransactionsRetrieval();
  80         profile.setValue(newProfile);
  81     }
  82     public static int getProfileIndex(MobileLedgerProfile profile) {
  83         try (LockHolder ignored = profilesLocker.lockForReading()) {
  84             List<MobileLedgerProfile> prList = profiles.getValue();
  85             if (prList == null)
  86                 throw new AssertionError();
  87             for (int i = 0; i < prList.size(); i++) {
  88                 MobileLedgerProfile p = prList.get(i);
  89                 if (p.equals(profile))
  90                     return i;
  91             }
  92
  93             return -1;
  94         }
  95     }
  96     @SuppressWarnings("WeakerAccess")
  97     public static int getProfileIndex(String profileUUID) {
  98         try (LockHolder ignored = profilesLocker.lockForReading()) {
  99             List<MobileLedgerProfile> prList = profiles.getValue();
 100             if (prList == null)
 101                 throw new AssertionError();
 102             for (int i = 0; i < prList.size(); i++) {
 103                 MobileLedgerProfile p = prList.get(i);
 104                 if (p.getUuid()
 105                      .equals(profileUUID))
 106                     return i;
 107             }
 108
 109             return -1;
 110         }
 111     }
 112     public static int retrieveCurrentThemeIdFromDb() {
 113         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 114         if (profileUUID == null)
 115             return -1;
 116
 117         SQLiteDatabase db = App.getDatabase();
 118         try (Cursor c = db.rawQuery("SELECT theme from profiles where uuid=?",
 119                 new String[]{profileUUID}))
 120         {
 121             if (c.moveToNext())
 122                 return c.getInt(0);
 123         }
 124
 125         return -1;
 126     }
 127     public static MobileLedgerProfile getProfile(String profileUUID) {
 128         MobileLedgerProfile profile;
 129         try (LockHolder readLock = profilesLocker.lockForReading()) {
 130             List<MobileLedgerProfile> prList = profiles.getValue();
 131             if ((prList == null) || prList.isEmpty()) {
 132                 readLock.close();
 133                 try (LockHolder ignored = profilesLocker.lockForWriting()) {
 134                     profile = MobileLedgerProfile.loadAllFromDB(profileUUID);
 135                 }
 136             }
 137             else {
 138                 int i = getProfileIndex(profileUUID);
 139                 if (i == -1)
 140                     i = 0;
 141                 profile = prList.get(i);
 142             }
 143         }
 144         return profile;
 145     }
 146     public synchronized static void scheduleTransactionListRetrieval(MainActivity activity) {
 147         if (retrieveTransactionsTask != null) {
 148             Logger.debug("db", "Ignoring request for transaction retrieval - already active");
 149             return;
 150         }
 151         MobileLedgerProfile pr = profile.getValue();
 152         if (pr == null) {
 153             Logger.debug("ui", "Ignoring refresh -- no current profile");
 154             return;
 155         }
 156
 157         retrieveTransactionsTask =
 158                 new RetrieveTransactionsTask(new WeakReference<>(activity), profile.getValue());
 159         Logger.debug("db", "Created a background transaction retrieval task");
 160
 161         retrieveTransactionsTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 162     }
 163     public static synchronized void stopTransactionsRetrieval() {
 164         if (retrieveTransactionsTask != null)
 165             retrieveTransactionsTask.cancel(false);
 166     }
 167     public static void transactionRetrievalDone() {
 168         retrieveTransactionsTask = null;
 169     }
 170     public static void refreshCurrencyData(Locale locale) {
 171         NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
 172         java.util.Currency currency = formatter.getCurrency();
 173         String symbol = currency.getSymbol();
 174         Logger.debug("locale", String.format(
 175                 "Discovering currency symbol position for locale %s (currency is %s; symbol is %s)",
 176                 locale.toString(), currency.toString(), symbol));
 177         String formatted = formatter.format(1234.56f);
 178         Logger.debug("locale", String.format("1234.56 formats as '%s'", formatted));
 179
 180         if (formatted.startsWith(symbol)) {
 181             currencySymbolPosition.setValue(Currency.Position.before);
 182
 183             // is the currency symbol directly followed by the first formatted digit?
 184             final char canary = formatted.charAt(symbol.length());
 185             currencyGap.setValue(canary != '1');
 186         }
 187         else if (formatted.endsWith(symbol)) {
 188             currencySymbolPosition.setValue(Currency.Position.after);
 189
 190             // is the currency symbol directly preceded bu the last formatted digit?
 191             final char canary = formatted.charAt(formatted.length() - symbol.length() - 1);
 192             currencyGap.setValue(canary != '6');
 193         }
 194         else
 195             currencySymbolPosition.setValue(Currency.Position.none);
 196     }
 197
 198 }