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