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 MutableLiveData<>();
  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     private static AtomicInteger backgroundTaskCount = new AtomicInteger(0);
  58     private static Locker profilesLocker = new Locker();
  59     private static RetrieveTransactionsTask retrieveTransactionsTask;
  60     public static void backgroundTaskStarted() {
  61         int cnt = backgroundTaskCount.incrementAndGet();
  62         debug("data",
  63                 String.format(Locale.ENGLISH, "background task count is %d after incrementing",
  64                         cnt));
  65         backgroundTasksRunning.postValue(cnt > 0);
  66     }
  67     public static void backgroundTaskFinished() {
  68         int cnt = backgroundTaskCount.decrementAndGet();
  69         debug("data",
  70                 String.format(Locale.ENGLISH, "background task count is %d after decrementing",
  71                         cnt));
  72         backgroundTasksRunning.postValue(cnt > 0);
  73     }
  74     public static void setCurrentProfile(MobileLedgerProfile newProfile) {
  75         MLDB.setOption(MLDB.OPT_PROFILE_UUID, (newProfile == null) ? null : newProfile.getUuid());
  76         stopTransactionsRetrieval();
  77         profile.postValue(newProfile);
  78     }
  79     public static int getProfileIndex(MobileLedgerProfile profile) {
  80         try (LockHolder ignored = profilesLocker.lockForReading()) {
  81             List<MobileLedgerProfile> prList = profiles.getValue();
  82             if (prList == null)
  83                 throw new AssertionError();
  84             for (int i = 0; i < prList.size(); i++) {
  85                 MobileLedgerProfile p = prList.get(i);
  86                 if (p.equals(profile))
  87                     return i;
  88             }
  89
  90             return -1;
  91         }
  92     }
  93     @SuppressWarnings("WeakerAccess")
  94     public static int getProfileIndex(String profileUUID) {
  95         try (LockHolder ignored = profilesLocker.lockForReading()) {
  96             List<MobileLedgerProfile> prList = profiles.getValue();
  97             if (prList == null)
  98                 throw new AssertionError();
  99             for (int i = 0; i < prList.size(); i++) {
 100                 MobileLedgerProfile p = prList.get(i);
 101                 if (p.getUuid()
 102                      .equals(profileUUID))
 103                     return i;
 104             }
 105
 106             return -1;
 107         }
 108     }
 109     public static int retrieveCurrentThemeIdFromDb() {
 110         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 111         if (profileUUID == null)
 112             return -1;
 113
 114         SQLiteDatabase db = App.getDatabase();
 115         try (Cursor c = db.rawQuery("SELECT theme from profiles where uuid=?",
 116                 new String[]{profileUUID}))
 117         {
 118             if (c.moveToNext())
 119                 return c.getInt(0);
 120         }
 121
 122         return -1;
 123     }
 124     public static MobileLedgerProfile getProfile(String profileUUID) {
 125         MobileLedgerProfile profile;
 126         try (LockHolder readLock = profilesLocker.lockForReading()) {
 127             List<MobileLedgerProfile> prList = profiles.getValue();
 128             if ((prList == null) || prList.isEmpty()) {
 129                 readLock.close();
 130                 try (LockHolder ignored = profilesLocker.lockForWriting()) {
 131                     profile = MobileLedgerProfile.loadAllFromDB(profileUUID);
 132                 }
 133             }
 134             else {
 135                 int i = getProfileIndex(profileUUID);
 136                 if (i == -1)
 137                     i = 0;
 138                 profile = prList.get(i);
 139             }
 140         }
 141         return profile;
 142     }
 143     public synchronized static void scheduleTransactionListRetrieval(MainActivity activity) {
 144         if (retrieveTransactionsTask != null) {
 145             Logger.debug("db", "Ignoring request for transaction retrieval - already active");
 146             return;
 147         }
 148         MobileLedgerProfile pr = profile.getValue();
 149         if (pr == null)
 150             throw new IllegalStateException("No current profile");
 151
 152         retrieveTransactionsTask =
 153                 new RetrieveTransactionsTask(new WeakReference<>(activity), profile.getValue());
 154         Logger.debug("db", "Created a background transaction retrieval task");
 155
 156         retrieveTransactionsTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 157     }
 158     public static synchronized void stopTransactionsRetrieval() {
 159         if (retrieveTransactionsTask != null)
 160             retrieveTransactionsTask.cancel(false);
 161     }
 162     public static void transactionRetrievalDone() {
 163         retrieveTransactionsTask = null;
 164     }
 165     public static void refreshCurrencyData(Locale locale) {
 166         NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
 167         java.util.Currency currency = formatter.getCurrency();
 168         String symbol = currency.getSymbol();
 169         Logger.debug("locale", String.format(
 170                 "Discovering currency symbol position for locale %s (currency is %s; symbol is %s)",
 171                 locale.toString(), currency.toString(), symbol));
 172         String formatted = formatter.format(1234.56f);
 173         Logger.debug("locale", String.format("1234.56 formats as '%s'", formatted));
 174         if (formatted.startsWith(symbol))
 175             currencySymbolPosition.setValue(Currency.Position.before);
 176         else if (formatted.endsWith(symbol))
 177             currencySymbolPosition.setValue(Currency.Position.after);
 178         else
 179             currencySymbolPosition.setValue(Currency.Position.none);
 180     }
 181
 182 }