app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.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.ui.activity;
  19
  20 import android.content.Context;
  21 import android.content.Intent;
  22 import android.content.pm.PackageInfo;
  23 import android.content.pm.ShortcutInfo;
  24 import android.content.pm.ShortcutManager;
  25 import android.content.res.ColorStateList;
  26 import android.graphics.Color;
  27 import android.graphics.drawable.Icon;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.text.format.DateUtils;
  31 import android.util.Log;
  32 import android.view.View;
  33 import android.view.animation.AnimationUtils;
  34 import android.widget.TextView;
  35
  36 import androidx.annotation.NonNull;
  37 import androidx.annotation.Nullable;
  38 import androidx.appcompat.app.ActionBarDrawerToggle;
  39 import androidx.appcompat.app.AlertDialog;
  40 import androidx.core.view.GravityCompat;
  41 import androidx.drawerlayout.widget.DrawerLayout;
  42 import androidx.fragment.app.Fragment;
  43 import androidx.fragment.app.FragmentActivity;
  44 import androidx.lifecycle.LiveData;
  45 import androidx.lifecycle.MutableLiveData;
  46 import androidx.lifecycle.ViewModelProvider;
  47 import androidx.recyclerview.widget.LinearLayoutManager;
  48 import androidx.recyclerview.widget.RecyclerView;
  49 import androidx.viewpager2.adapter.FragmentStateAdapter;
  50 import androidx.viewpager2.widget.ViewPager2;
  51
  52 import com.google.android.material.snackbar.Snackbar;
  53
  54 import net.ktnx.mobileledger.BackupsActivity;
  55 import net.ktnx.mobileledger.R;
  56 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  57 import net.ktnx.mobileledger.async.TransactionAccumulator;
  58 import net.ktnx.mobileledger.databinding.ActivityMainBinding;
  59 import net.ktnx.mobileledger.db.DB;
  60 import net.ktnx.mobileledger.db.Option;
  61 import net.ktnx.mobileledger.db.Profile;
  62 import net.ktnx.mobileledger.db.TransactionWithAccounts;
  63 import net.ktnx.mobileledger.model.Data;
  64 import net.ktnx.mobileledger.model.LedgerTransaction;
  65 import net.ktnx.mobileledger.ui.FabManager;
  66 import net.ktnx.mobileledger.ui.MainModel;
  67 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  68 import net.ktnx.mobileledger.ui.new_transaction.NewTransactionActivity;
  69 import net.ktnx.mobileledger.ui.profiles.ProfileDetailActivity;
  70 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  71 import net.ktnx.mobileledger.ui.templates.TemplatesActivity;
  72 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  73 import net.ktnx.mobileledger.utils.Colors;
  74 import net.ktnx.mobileledger.utils.Logger;
  75 import net.ktnx.mobileledger.utils.Misc;
  76
  77 import org.jetbrains.annotations.NotNull;
  78
  79 import java.util.ArrayList;
  80 import java.util.Date;
  81 import java.util.List;
  82 import java.util.Locale;
  83 import java.util.Objects;
  84
  85 /*
  86  * TODO: reports
  87  *  */
  88
  89 public class MainActivity extends ProfileThemedActivity implements FabManager.FabHandler {
  90     public static final String TAG = "main-act";
  91     public static final String STATE_CURRENT_PAGE = "current_page";
  92     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  93     public static final String STATE_ACC_FILTER = "account_filter";
  94     private static final boolean FAB_HIDDEN = false;
  95     private static final boolean FAB_SHOWN = true;
  96     private ConverterThread converterThread = null;
  97     private SectionsPagerAdapter mSectionsPagerAdapter;
  98     private ProfilesRecyclerViewAdapter mProfileListAdapter;
  99     private int mCurrentPage;
 100     private boolean mBackMeansToAccountList = false;
 101     private DrawerLayout.SimpleDrawerListener drawerListener;
 102     private ActionBarDrawerToggle barDrawerToggle;
 103     private ViewPager2.OnPageChangeCallback pageChangeCallback;
 104     private Profile profile;
 105     private MainModel mainModel;
 106     private ActivityMainBinding b;
 107     private int fabVerticalOffset;
 108     private FabManager fabManager;
 109     @Override
 110     protected void onStart() {
 111         super.onStart();
 112
 113         Logger.debug(TAG, "onStart()");
 114
 115         b.mainPager.setCurrentItem(mCurrentPage, false);
 116     }
 117     @Override
 118     protected void onSaveInstanceState(@NotNull Bundle outState) {
 119         super.onSaveInstanceState(outState);
 120         outState.putInt(STATE_CURRENT_PAGE, b.mainPager.getCurrentItem());
 121         if (mainModel.getAccountFilter()
 122                      .getValue() != null)
 123             outState.putString(STATE_ACC_FILTER, mainModel.getAccountFilter()
 124                                                           .getValue());
 125     }
 126     @Override
 127     protected void onDestroy() {
 128         mSectionsPagerAdapter = null;
 129         b.navProfileList.setAdapter(null);
 130         b.drawerLayout.removeDrawerListener(drawerListener);
 131         drawerListener = null;
 132         b.drawerLayout.removeDrawerListener(barDrawerToggle);
 133         barDrawerToggle = null;
 134         b.mainPager.unregisterOnPageChangeCallback(pageChangeCallback);
 135         pageChangeCallback = null;
 136         super.onDestroy();
 137     }
 138     @Override
 139     protected void onResume() {
 140         super.onResume();
 141         fabShouldShow();
 142     }
 143     @Override
 144     protected void onCreate(Bundle savedInstanceState) {
 145         Logger.debug(TAG, "onCreate()/entry");
 146         super.onCreate(savedInstanceState);
 147         Logger.debug(TAG, "onCreate()/after super");
 148         b = ActivityMainBinding.inflate(getLayoutInflater());
 149         setContentView(b.getRoot());
 150
 151         mainModel = new ViewModelProvider(this).get(MainModel.class);
 152
 153         mSectionsPagerAdapter = new SectionsPagerAdapter(this);
 154
 155         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 156         if (extra != null && savedInstanceState == null)
 157             savedInstanceState = extra;
 158
 159
 160         setSupportActionBar(b.toolbar);
 161
 162         Data.observeProfile(this, this::onProfileChanged);
 163
 164         Data.profiles.observe(this, this::onProfileListChanged);
 165
 166         Data.backgroundTaskProgress.observe(this, this::onRetrieveProgress);
 167         Data.backgroundTasksRunning.observe(this, this::onRetrieveRunningChanged);
 168
 169         if (barDrawerToggle == null) {
 170             barDrawerToggle = new ActionBarDrawerToggle(this, b.drawerLayout, b.toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 171             b.drawerLayout.addDrawerListener(barDrawerToggle);
 172         }
 173         barDrawerToggle.syncState();
 174
 175         try {
 176             PackageInfo pi = getApplicationContext().getPackageManager()
 177                                                     .getPackageInfo(getPackageName(), 0);
 178             ((TextView) b.navUpper.findViewById(R.id.drawer_version_text)).setText(pi.versionName);
 179             ((TextView) b.noProfilesLayout.findViewById(R.id.drawer_version_text)).setText(pi.versionName);
 180         }
 181         catch (Exception e) {
 182             e.printStackTrace();
 183         }
 184
 185         markDrawerItemCurrent(R.id.nav_account_summary);
 186
 187         b.mainPager.setAdapter(mSectionsPagerAdapter);
 188         b.mainPager.setOffscreenPageLimit(1);
 189
 190         if (pageChangeCallback == null) {
 191             pageChangeCallback = new ViewPager2.OnPageChangeCallback() {
 192                 @Override
 193                 public void onPageSelected(int position) {
 194                     mCurrentPage = position;
 195                     switch (position) {
 196                         case 0:
 197                             markDrawerItemCurrent(R.id.nav_account_summary);
 198                             break;
 199                         case 1:
 200                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 201                             break;
 202                         default:
 203                             Log.e(TAG, String.format("Unexpected page index %d", position));
 204                     }
 205
 206                     super.onPageSelected(position);
 207                 }
 208             };
 209             b.mainPager.registerOnPageChangeCallback(pageChangeCallback);
 210         }
 211
 212         mCurrentPage = 0;
 213         if (savedInstanceState != null) {
 214             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 215             if (currentPage != -1) {
 216                 mCurrentPage = currentPage;
 217             }
 218             mainModel.getAccountFilter()
 219                      .setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
 220         }
 221
 222         b.btnNoProfilesAdd.setOnClickListener(v -> ProfileDetailActivity.start(this, null));
 223
 224         b.btnAddTransaction.setOnClickListener(this::fabNewTransactionClicked);
 225
 226         b.navNewProfileButton.setOnClickListener(v -> ProfileDetailActivity.start(this, null));
 227
 228         b.transactionListCancelDownload.setOnClickListener(this::onStopTransactionRefreshClick);
 229
 230         if (mProfileListAdapter == null)
 231             mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 232         b.navProfileList.setAdapter(mProfileListAdapter);
 233
 234         mProfileListAdapter.editingProfiles.observe(this, newValue -> {
 235             if (newValue) {
 236                 b.navProfilesStartEdit.setVisibility(View.GONE);
 237                 b.navProfilesCancelEdit.setVisibility(View.VISIBLE);
 238                 b.navNewProfileButton.setVisibility(View.VISIBLE);
 239                 if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
 240                     b.navProfilesStartEdit.startAnimation(
 241                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 242                     b.navProfilesCancelEdit.startAnimation(
 243                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 244                     b.navNewProfileButton.startAnimation(
 245                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 246                 }
 247             }
 248             else {
 249                 b.navProfilesCancelEdit.setVisibility(View.GONE);
 250                 b.navProfilesStartEdit.setVisibility(View.VISIBLE);
 251                 b.navNewProfileButton.setVisibility(View.GONE);
 252                 if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
 253                     b.navProfilesCancelEdit.startAnimation(
 254                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 255                     b.navProfilesStartEdit.startAnimation(
 256                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 257                     b.navNewProfileButton.startAnimation(
 258                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 259                 }
 260             }
 261
 262             mProfileListAdapter.notifyDataSetChanged();
 263         });
 264
 265         fabManager = new FabManager(b.btnAddTransaction);
 266
 267         LinearLayoutManager llm = new LinearLayoutManager(this);
 268
 269         llm.setOrientation(RecyclerView.VERTICAL);
 270         b.navProfileList.setLayoutManager(llm);
 271
 272         b.navProfilesStartEdit.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 273         b.navProfilesCancelEdit.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 274         b.navProfileListHeadButtons.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 275         if (drawerListener == null) {
 276             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 277                 @Override
 278                 public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
 279                     if (slideOffset > 0.2)
 280                         fabManager.hideFab();
 281                 }
 282                 @Override
 283                 public void onDrawerClosed(View drawerView) {
 284                     super.onDrawerClosed(drawerView);
 285                     mProfileListAdapter.setAnimationsEnabled(false);
 286                     mProfileListAdapter.editingProfiles.setValue(false);
 287                     Data.drawerOpen.setValue(false);
 288                     fabShouldShow();
 289                 }
 290                 @Override
 291                 public void onDrawerOpened(View drawerView) {
 292                     super.onDrawerOpened(drawerView);
 293                     mProfileListAdapter.setAnimationsEnabled(true);
 294                     Data.drawerOpen.setValue(true);
 295                     fabManager.hideFab();
 296                 }
 297             };
 298             b.drawerLayout.addDrawerListener(drawerListener);
 299         }
 300
 301         Data.drawerOpen.observe(this, open -> {
 302             if (open)
 303                 b.drawerLayout.open();
 304             else
 305                 b.drawerLayout.close();
 306         });
 307
 308         mainModel.getUpdateError()
 309                  .observe(this, (error) -> {
 310                      if (error == null)
 311                          return;
 312
 313                      Snackbar.make(b.mainPager, error, Snackbar.LENGTH_INDEFINITE)
 314                              .show();
 315                      mainModel.clearUpdateError();
 316                  });
 317         Data.locale.observe(this, l -> refreshLastUpdateInfo());
 318         Data.lastUpdateDate.observe(this, date -> refreshLastUpdateInfo());
 319         Data.lastUpdateTransactionCount.observe(this, date -> refreshLastUpdateInfo());
 320         Data.lastUpdateAccountCount.observe(this, date -> refreshLastUpdateInfo());
 321         b.navAccountSummary.setOnClickListener(this::onAccountSummaryClicked);
 322         b.navLatestTransactions.setOnClickListener(this::onLatestTransactionsClicked);
 323         b.navPatterns.setOnClickListener(this::onPatternsClick);
 324         b.navBackupRestore.setOnClickListener(this::onBackupRestoreClick);
 325     }
 326     private void onBackupRestoreClick(View view) {
 327         Intent intent = new Intent(this, BackupsActivity.class);
 328         startActivity(intent);
 329     }
 330     private void onPatternsClick(View view) {
 331         Intent intent = new Intent(this, TemplatesActivity.class);
 332         startActivity(intent);
 333     }
 334     private void scheduleDataRetrievalIfStale(long lastUpdate) {
 335         long now = new Date().getTime();
 336         if ((lastUpdate == 0) || (now > (lastUpdate + (24 * 3600 * 1000)))) {
 337             if (lastUpdate == 0)
 338                 Logger.debug("db::", "WEB data never fetched. scheduling a fetch");
 339             else
 340                 Logger.debug("db", String.format(Locale.ENGLISH,
 341                         "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 342                         lastUpdate / 1000f, now / 1000f));
 343
 344             mainModel.scheduleTransactionListRetrieval();
 345         }
 346     }
 347     private void createShortcuts(List<Profile> list) {
 348         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
 349             return;
 350
 351         ShortcutManager sm = getSystemService(ShortcutManager.class);
 352         List<ShortcutInfo> shortcuts = new ArrayList<>();
 353         int i = 0;
 354         for (Profile p : list) {
 355             if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
 356                 break;
 357
 358             if (!p.permitPosting())
 359                 continue;
 360
 361             final ShortcutInfo.Builder builder =
 362                     new ShortcutInfo.Builder(this, "new_transaction_" + p.getId());
 363             ShortcutInfo si = builder.setShortLabel(p.getName())
 364                                      .setIcon(Icon.createWithResource(this,
 365                                              R.drawable.thick_plus_icon))
 366                                      .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 367                                              NewTransactionActivity.class).putExtra(
 368                                              ProfileThemedActivity.PARAM_PROFILE_ID, p.getId())
 369                                                                           .putExtra(
 370                                                                                   ProfileThemedActivity.PARAM_THEME,
 371                                                                                   p.getTheme()))
 372                                      .setRank(i)
 373                                      .build();
 374             shortcuts.add(si);
 375             i++;
 376         }
 377         sm.setDynamicShortcuts(shortcuts);
 378     }
 379     private void onProfileListChanged(List<Profile> newList) {
 380         if ((newList == null) || newList.isEmpty()) {
 381             b.noProfilesLayout.setVisibility(View.VISIBLE);
 382             b.mainAppLayout.setVisibility(View.GONE);
 383             return;
 384         }
 385
 386         b.mainAppLayout.setVisibility(View.VISIBLE);
 387         b.noProfilesLayout.setVisibility(View.GONE);
 388
 389         b.navProfileList.setMinimumHeight(
 390                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 391
 392         Logger.debug("profiles", "profile list changed");
 393         mProfileListAdapter.setProfileList(newList);
 394
 395         createShortcuts(newList);
 396
 397         final Profile currentProfile = Data.getProfile();
 398         Profile replacementProfile = null;
 399         if (currentProfile != null) {
 400             for (Profile p : newList) {
 401                 if (p.getId() == currentProfile.getId()) {
 402                     replacementProfile = p;
 403                     break;
 404                 }
 405             }
 406         }
 407
 408         if (replacementProfile == null) {
 409             Logger.debug(TAG, "Switching profile because the current is no longer available");
 410             Data.setCurrentProfile(newList.get(0));
 411         }
 412         else {
 413             Data.setCurrentProfile(replacementProfile);
 414         }
 415     }
 416     /**
 417      * called when the current profile has changed
 418      */
 419     private void onProfileChanged(@Nullable Profile newProfile) {
 420         if (this.profile != null) {
 421             if (this.profile.equals(newProfile))
 422                 return;
 423         }
 424
 425         boolean haveProfile = newProfile != null;
 426
 427         if (haveProfile)
 428             setTitle(newProfile.getName());
 429         else
 430             setTitle(R.string.app_name);
 431
 432         int newProfileTheme = haveProfile ? newProfile.getTheme() : Colors.DEFAULT_HUE_DEG;
 433         if (newProfileTheme != Colors.profileThemeId) {
 434             Logger.debug("profiles",
 435                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 436                             newProfileTheme));
 437             Colors.profileThemeId = newProfileTheme;
 438             profileThemeChanged();
 439             // profileThemeChanged would restart the activity, so no need to reload the
 440             // data sets below
 441             return;
 442         }
 443
 444         final boolean sameProfileId = (newProfile != null) && (this.profile != null) &&
 445                                       this.profile.getId() == newProfile.getId();
 446
 447         this.profile = newProfile;
 448
 449         b.noProfilesLayout.setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 450         b.pagerLayout.setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 451
 452         mProfileListAdapter.notifyDataSetChanged();
 453
 454         if (haveProfile) {
 455             if (newProfile.permitPosting()) {
 456                 b.toolbar.setSubtitle(null);
 457                 b.btnAddTransaction.show();
 458             }
 459             else {
 460                 b.toolbar.setSubtitle(R.string.profile_subtitle_read_only);
 461                 b.btnAddTransaction.hide();
 462             }
 463         }
 464         else {
 465             b.toolbar.setSubtitle(null);
 466             b.btnAddTransaction.hide();
 467         }
 468
 469         updateLastUpdateTextFromDB();
 470
 471         if (sameProfileId) {
 472             Logger.debug(TAG, String.format(Locale.ROOT, "Short-cut profile 'changed' to %d",
 473                     newProfile.getId()));
 474             return;
 475         }
 476
 477         mainModel.getAccountFilter()
 478                  .observe(this, this::onAccountFilterChanged);
 479
 480         mainModel.stopTransactionsRetrieval();
 481         mainModel.clearTransactions();
 482     }
 483     private void onAccountFilterChanged(String accFilter) {
 484         Logger.debug(TAG, "account filter changed, reloading transactions");
 485 //                     mainModel.scheduleTransactionListReload();
 486         LiveData<List<TransactionWithAccounts>> transactions =
 487                 new MutableLiveData<>(new ArrayList<>());
 488         if (profile != null) {
 489             if (accFilter == null || accFilter.isEmpty()) {
 490                 transactions = DB.get()
 491                                  .getTransactionDAO()
 492                                  .getAllWithAccounts(profile.getId());
 493             }
 494             else {
 495                 transactions = DB.get()
 496                                  .getTransactionDAO()
 497                                  .getAllWithAccountsFiltered(profile.getId(), accFilter);
 498             }
 499         }
 500
 501         transactions.observe(this, list -> {
 502             Logger.debug(TAG,
 503                     String.format(Locale.ROOT, "got transaction list from DB (%d transactions)",
 504                             list.size()));
 505
 506             if (converterThread != null)
 507                 converterThread.interrupt();
 508             converterThread = new ConverterThread(mainModel, list, accFilter);
 509             converterThread.start();
 510         });
 511     }
 512     private void profileThemeChanged() {
 513         // un-hook all observed LiveData
 514         Data.removeProfileObservers(this);
 515         Data.profiles.removeObservers(this);
 516         Data.lastUpdateTransactionCount.removeObservers(this);
 517         Data.lastUpdateAccountCount.removeObservers(this);
 518         Data.lastUpdateDate.removeObservers(this);
 519
 520         Logger.debug(TAG, "profileThemeChanged(): recreating activity");
 521         recreate();
 522     }
 523     public void fabNewTransactionClicked(View view) {
 524         Intent intent = new Intent(this, NewTransactionActivity.class);
 525         intent.putExtra(ProfileThemedActivity.PARAM_PROFILE_ID, profile.getId());
 526         intent.putExtra(ProfileThemedActivity.PARAM_THEME, profile.getTheme());
 527         startActivity(intent);
 528         overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
 529     }
 530     public void markDrawerItemCurrent(int id) {
 531         TextView item = b.drawerLayout.findViewById(id);
 532         item.setBackgroundColor(Colors.tableRowDarkBG);
 533
 534         for (int i = 0; i < b.navActions.getChildCount(); i++) {
 535             View view = b.navActions.getChildAt(i);
 536             if (view.getId() != id) {
 537                 view.setBackgroundColor(Color.TRANSPARENT);
 538             }
 539         }
 540     }
 541     public void onAccountSummaryClicked(View view) {
 542         b.drawerLayout.closeDrawers();
 543
 544         showAccountSummaryFragment();
 545     }
 546     private void showAccountSummaryFragment() {
 547         b.mainPager.setCurrentItem(0, true);
 548         mainModel.getAccountFilter()
 549                  .setValue(null);
 550     }
 551     public void onLatestTransactionsClicked(View view) {
 552         b.drawerLayout.closeDrawers();
 553
 554         showTransactionsFragment(null);
 555     }
 556     public void showTransactionsFragment(String accName) {
 557         mainModel.getAccountFilter()
 558                  .setValue(accName);
 559         b.mainPager.setCurrentItem(1, true);
 560     }
 561     public void showAccountTransactions(String accountName) {
 562         mBackMeansToAccountList = true;
 563         showTransactionsFragment(accountName);
 564     }
 565     @Override
 566     public void onBackPressed() {
 567         if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
 568             b.drawerLayout.closeDrawer(GravityCompat.START);
 569         }
 570         else {
 571             if (mBackMeansToAccountList && (b.mainPager.getCurrentItem() == 1)) {
 572                 mainModel.getAccountFilter()
 573                          .setValue(null);
 574                 showAccountSummaryFragment();
 575                 mBackMeansToAccountList = false;
 576             }
 577             else {
 578                 Logger.debug(TAG, String.format(Locale.ENGLISH, "manager stack: %d",
 579                         getSupportFragmentManager().getBackStackEntryCount()));
 580
 581                 super.onBackPressed();
 582             }
 583         }
 584     }
 585     public void updateLastUpdateTextFromDB() {
 586         if (profile == null)
 587             return;
 588
 589         DB.get()
 590           .getOptionDAO()
 591           .load(profile.getId(), Option.OPT_LAST_SCRAPE)
 592           .observe(this, opt -> {
 593               long lastUpdate = 0;
 594               if (opt != null) {
 595                   try {
 596                       lastUpdate = Long.parseLong(opt.getValue());
 597                   }
 598                   catch (NumberFormatException ex) {
 599                       Logger.debug(TAG, String.format("Error parsing '%s' as long", opt.getValue()),
 600                               ex);
 601                   }
 602               }
 603
 604               if (lastUpdate == 0) {
 605                   Data.lastUpdateDate.postValue(null);
 606               }
 607               else {
 608                   Data.lastUpdateDate.postValue(new Date(lastUpdate));
 609               }
 610
 611               scheduleDataRetrievalIfStale(lastUpdate);
 612           });
 613     }
 614     private void refreshLastUpdateInfo() {
 615         final int formatFlags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR |
 616                                 DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_NUMERIC_DATE;
 617         String templateForTransactions =
 618                 getResources().getString(R.string.transaction_count_summary);
 619         String templateForAccounts = getResources().getString(R.string.account_count_summary);
 620         Integer accountCount = Data.lastUpdateAccountCount.getValue();
 621         Integer transactionCount = Data.lastUpdateTransactionCount.getValue();
 622         Date lastUpdate = Data.lastUpdateDate.getValue();
 623         if (lastUpdate == null) {
 624             Data.lastTransactionsUpdateText.setValue("----");
 625             Data.lastAccountsUpdateText.setValue("----");
 626         }
 627         else {
 628             Data.lastTransactionsUpdateText.setValue(
 629                     String.format(Objects.requireNonNull(Data.locale.getValue()),
 630                             templateForTransactions,
 631                             transactionCount == null ? 0 : transactionCount,
 632                             DateUtils.formatDateTime(this, lastUpdate.getTime(), formatFlags)));
 633             Data.lastAccountsUpdateText.setValue(
 634                     String.format(Objects.requireNonNull(Data.locale.getValue()),
 635                             templateForAccounts, accountCount == null ? 0 : accountCount,
 636                             DateUtils.formatDateTime(this, lastUpdate.getTime(), formatFlags)));
 637         }
 638     }
 639     public void onStopTransactionRefreshClick(View view) {
 640         Logger.debug(TAG, "Cancelling transactions refresh");
 641         mainModel.stopTransactionsRetrieval();
 642         b.transactionListCancelDownload.setEnabled(false);
 643     }
 644     public void onRetrieveRunningChanged(Boolean running) {
 645         if (running) {
 646             b.transactionListCancelDownload.setEnabled(true);
 647             ColorStateList csl = Colors.getColorStateList();
 648             b.transactionListProgressBar.setIndeterminateTintList(csl);
 649             b.transactionListProgressBar.setProgressTintList(csl);
 650             b.transactionListProgressBar.setIndeterminate(true);
 651             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 652                 b.transactionListProgressBar.setProgress(0, false);
 653             }
 654             else {
 655                 b.transactionListProgressBar.setProgress(0);
 656             }
 657             b.transactionProgressLayout.setVisibility(View.VISIBLE);
 658         }
 659         else {
 660             b.transactionProgressLayout.setVisibility(View.GONE);
 661         }
 662     }
 663     public void onRetrieveProgress(@Nullable RetrieveTransactionsTask.Progress progress) {
 664         if (progress == null ||
 665             progress.getState() == RetrieveTransactionsTask.ProgressState.FINISHED)
 666         {
 667             Logger.debug(TAG, "progress: Done");
 668             b.transactionProgressLayout.setVisibility(View.GONE);
 669
 670             mainModel.transactionRetrievalDone();
 671
 672             String error = (progress == null) ? null : progress.getError();
 673             if (error != null) {
 674                 if (error.equals(RetrieveTransactionsTask.Result.ERR_JSON_PARSER_ERROR))
 675                     error = getResources().getString(R.string.err_json_parser_error);
 676
 677                 AlertDialog.Builder builder = new AlertDialog.Builder(this);
 678                 builder.setMessage(error);
 679                 builder.setPositiveButton(R.string.btn_profile_options, (dialog, which) -> {
 680                     Logger.debug(TAG, "will start profile editor");
 681                     ProfileDetailActivity.start(this, profile);
 682                 });
 683                 builder.create()
 684                        .show();
 685                 return;
 686             }
 687
 688             return;
 689         }
 690
 691
 692         b.transactionListCancelDownload.setEnabled(true);
 693 //        ColorStateList csl = Colors.getColorStateList();
 694 //        progressBar.setIndeterminateTintList(csl);
 695 //        progressBar.setProgressTintList(csl);
 696 //        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 697 //            progressBar.setProgress(0, false);
 698 //        else
 699 //            progressBar.setProgress(0);
 700         b.transactionProgressLayout.setVisibility(View.VISIBLE);
 701
 702         if (progress.isIndeterminate() || (progress.getTotal() <= 0)) {
 703             b.transactionListProgressBar.setIndeterminate(true);
 704             Logger.debug(TAG, "progress: indeterminate");
 705         }
 706         else {
 707             if (b.transactionListProgressBar.isIndeterminate()) {
 708                 b.transactionListProgressBar.setIndeterminate(false);
 709             }
 710 //            Logger.debug(TAG,
 711 //                    String.format(Locale.US, "progress: %d/%d", progress.getProgress(),
 712 //                    progress.getTotal
 713 //                    ()));
 714             b.transactionListProgressBar.setMax(progress.getTotal());
 715             // for some reason animation doesn't work - no progress is shown (stick at 0)
 716             // on lineageOS 14.1 (Nougat, 7.1.2)
 717             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 718                 b.transactionListProgressBar.setProgress(progress.getProgress(), false);
 719             else
 720                 b.transactionListProgressBar.setProgress(progress.getProgress());
 721         }
 722     }
 723     public void fabShouldShow() {
 724         if ((profile != null) && profile.permitPosting() && !b.drawerLayout.isOpen())
 725             fabManager.showFab();
 726     }
 727     @Override
 728     public Context getContext() {
 729         return this;
 730     }
 731     @Override
 732     public void showManagedFab() {
 733         fabShouldShow();
 734     }
 735     @Override
 736     public void hideManagedFab() {
 737         fabManager.hideFab();
 738     }
 739     public static class SectionsPagerAdapter extends FragmentStateAdapter {
 740
 741         public SectionsPagerAdapter(@NonNull FragmentActivity fragmentActivity) {
 742             super(fragmentActivity);
 743         }
 744         @NotNull
 745         @Override
 746         public Fragment createFragment(int position) {
 747             Logger.debug(TAG, String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 748             switch (position) {
 749                 case 0:
 750 //                    debug(TAG, "Creating account summary fragment");
 751                     return new AccountSummaryFragment();
 752                 case 1:
 753                     return new TransactionListFragment();
 754                 default:
 755                     throw new IllegalStateException(
 756                             String.format("Unexpected fragment index: " + "%d", position));
 757             }
 758         }
 759
 760         @Override
 761         public int getItemCount() {
 762             return 2;
 763         }
 764     }
 765
 766     static private class ConverterThread extends Thread {
 767         private final List<TransactionWithAccounts> list;
 768         private final MainModel model;
 769         private final String accFilter;
 770         public ConverterThread(@NonNull MainModel model,
 771                                @NonNull List<TransactionWithAccounts> list, String accFilter) {
 772             this.model = model;
 773             this.list = list;
 774             this.accFilter = accFilter;
 775         }
 776         @Override
 777         public void run() {
 778             TransactionAccumulator accumulator = new TransactionAccumulator(accFilter, accFilter);
 779
 780             for (TransactionWithAccounts tr : list) {
 781                 if (isInterrupted()) {
 782                     Logger.debug(TAG, "ConverterThread bailing out on interrupt");
 783                     return;
 784                 }
 785                 accumulator.put(new LedgerTransaction(tr));
 786             }
 787
 788             if (isInterrupted()) {
 789                 Logger.debug(TAG, "ConverterThread bailing out on interrupt");
 790                 return;
 791             }
 792
 793             Logger.debug(TAG, "ConverterThread publishing results");
 794
 795             Misc.onMainThread(() -> accumulator.publishResults(model));
 796         }
 797     }
 798 }