app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.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.ui.activity;
  19
  20 import android.content.Intent;
  21 import android.content.SharedPreferences;
  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.AsyncTask;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.util.Log;
  32 import android.view.View;
  33 import android.view.ViewGroup;
  34 import android.view.ViewPropertyAnimator;
  35 import android.view.animation.AnimationUtils;
  36 import android.widget.LinearLayout;
  37 import android.widget.ProgressBar;
  38 import android.widget.TextView;
  39
  40 import androidx.annotation.NonNull;
  41 import androidx.appcompat.app.ActionBarDrawerToggle;
  42 import androidx.appcompat.widget.Toolbar;
  43 import androidx.core.view.GravityCompat;
  44 import androidx.drawerlayout.widget.DrawerLayout;
  45 import androidx.fragment.app.Fragment;
  46 import androidx.fragment.app.FragmentManager;
  47 import androidx.fragment.app.FragmentPagerAdapter;
  48 import androidx.recyclerview.widget.LinearLayoutManager;
  49 import androidx.recyclerview.widget.RecyclerView;
  50 import androidx.viewpager.widget.ViewPager;
  51
  52 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  53 import com.google.android.material.snackbar.Snackbar;
  54
  55 import net.ktnx.mobileledger.R;
  56 import net.ktnx.mobileledger.async.DbOpQueue;
  57 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  58 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  59 import net.ktnx.mobileledger.model.Data;
  60 import net.ktnx.mobileledger.model.LedgerAccount;
  61 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  62 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
  63 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  64 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
  65 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  66 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  67 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  68 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  69 import net.ktnx.mobileledger.utils.Colors;
  70 import net.ktnx.mobileledger.utils.GetOptCallback;
  71 import net.ktnx.mobileledger.utils.LockHolder;
  72 import net.ktnx.mobileledger.utils.MLDB;
  73
  74 import org.jetbrains.annotations.NotNull;
  75
  76 import java.text.DateFormat;
  77 import java.util.ArrayList;
  78 import java.util.Date;
  79 import java.util.List;
  80 import java.util.Locale;
  81
  82 import static net.ktnx.mobileledger.utils.Logger.debug;
  83
  84 /*
  85  * TODO: reports
  86  *  */
  87
  88 public class MainActivity extends ProfileThemedActivity {
  89     public static final String STATE_CURRENT_PAGE = "current_page";
  90     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  91     public static final String STATE_ACC_FILTER = "account_filter";
  92     private static final String PREF_THEME_ID = "themeId";
  93     public AccountSummaryFragment mAccountSummaryFragment;
  94     DrawerLayout drawer;
  95     private View profileListHeadMore, profileListHeadCancel, profileListHeadAddProfile;
  96     private View bTransactionListCancelDownload;
  97     private SectionsPagerAdapter mSectionsPagerAdapter;
  98     private ViewPager mViewPager;
  99     private FloatingActionButton fab;
 100     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 101     private int mCurrentPage;
 102     private boolean mBackMeansToAccountList = false;
 103     private Toolbar mToolbar;
 104     private DrawerLayout.SimpleDrawerListener drawerListener;
 105     private ActionBarDrawerToggle barDrawerToggle;
 106     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 107     private MobileLedgerProfile profile;
 108     @Override
 109     protected void onStart() {
 110         super.onStart();
 111
 112         mViewPager.setCurrentItem(mCurrentPage, false);
 113     }
 114     @Override
 115     protected void onSaveInstanceState(@NotNull Bundle outState) {
 116         super.onSaveInstanceState(outState);
 117         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 118         if (Data.accountFilter.getValue() != null)
 119             outState.putString(STATE_ACC_FILTER, Data.accountFilter.getValue());
 120     }
 121     @Override
 122     protected void onDestroy() {
 123         mSectionsPagerAdapter = null;
 124         RecyclerView root = findViewById(R.id.nav_profile_list);
 125         if (root != null)
 126             root.setAdapter(null);
 127         if (drawer != null)
 128             drawer.removeDrawerListener(drawerListener);
 129         drawerListener = null;
 130         if (drawer != null)
 131             drawer.removeDrawerListener(barDrawerToggle);
 132         barDrawerToggle = null;
 133         if (mViewPager != null)
 134             mViewPager.removeOnPageChangeListener(pageChangeListener);
 135         pageChangeListener = null;
 136         super.onDestroy();
 137     }
 138     @Override
 139     protected void setupProfileColors() {
 140         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 141         int profileColor = prefs.getInt(PREF_THEME_ID, -2);
 142         if (profileColor == -2)
 143             profileColor = Data.retrieveCurrentThemeIdFromDb();
 144         Colors.setupTheme(this, profileColor);
 145         Colors.profileThemeId = profileColor;
 146         storeThemeIdInPrefs(profileColor);
 147     }
 148     @Override
 149     protected void onResume() {
 150         super.onResume();
 151         fabShouldShow();
 152     }
 153     @Override
 154     protected void onCreate(Bundle savedInstanceState) {
 155         super.onCreate(savedInstanceState);
 156         debug("flow", "MainActivity.onCreate()");
 157         setContentView(R.layout.activity_main);
 158
 159         fab = findViewById(R.id.btn_add_transaction);
 160         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 161         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 162         LinearLayout profileListHeadMoreAndCancel =
 163                 findViewById(R.id.nav_profile_list_head_buttons);
 164         profileListHeadAddProfile = findViewById(R.id.nav_new_profile_button);
 165         drawer = findViewById(R.id.drawer_layout);
 166         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 167         mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
 168         mViewPager = findViewById(R.id.root_frame);
 169
 170         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 171         if (extra != null && savedInstanceState == null)
 172             savedInstanceState = extra;
 173
 174
 175         mToolbar = findViewById(R.id.toolbar);
 176         setSupportActionBar(mToolbar);
 177
 178         Data.profile.observe(this, this::onProfileChanged);
 179
 180         Data.profiles.observe(this, this::onProfileListChanged);
 181
 182         if (barDrawerToggle == null) {
 183             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 184                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 185             drawer.addDrawerListener(barDrawerToggle);
 186         }
 187         barDrawerToggle.syncState();
 188
 189         try {
 190             PackageInfo pi = getApplicationContext().getPackageManager()
 191                                                     .getPackageInfo(getPackageName(), 0);
 192             ((TextView) findViewById(R.id.nav_upper).findViewById(
 193                     R.id.drawer_version_text)).setText(pi.versionName);
 194             ((TextView) findViewById(R.id.no_profiles_layout).findViewById(
 195                     R.id.drawer_version_text)).setText(pi.versionName);
 196         }
 197         catch (Exception e) {
 198             e.printStackTrace();
 199         }
 200
 201         markDrawerItemCurrent(R.id.nav_account_summary);
 202
 203         mViewPager.setAdapter(mSectionsPagerAdapter);
 204
 205         if (pageChangeListener == null) {
 206             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 207                 @Override
 208                 public void onPageSelected(int position) {
 209                     mCurrentPage = position;
 210                     switch (position) {
 211                         case 0:
 212                             markDrawerItemCurrent(R.id.nav_account_summary);
 213                             break;
 214                         case 1:
 215                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 216                             break;
 217                         default:
 218                             Log.e("MainActivity",
 219                                     String.format("Unexpected page index %d", position));
 220                     }
 221
 222                     super.onPageSelected(position);
 223                 }
 224             };
 225             mViewPager.addOnPageChangeListener(pageChangeListener);
 226         }
 227
 228         mCurrentPage = 0;
 229         if (savedInstanceState != null) {
 230             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 231             if (currentPage != -1) {
 232                 mCurrentPage = currentPage;
 233             }
 234             Data.accountFilter.setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
 235         }
 236
 237         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 238
 239         findViewById(R.id.btn_no_profiles_add).setOnClickListener(
 240                 v -> startEditProfileActivity(null));
 241
 242         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 243
 244         findViewById(R.id.nav_new_profile_button).setOnClickListener(
 245                 v -> startEditProfileActivity(null));
 246
 247         RecyclerView root = findViewById(R.id.nav_profile_list);
 248         if (root == null)
 249             throw new RuntimeException("Can't get hold on the transaction value view");
 250
 251         if (mProfileListAdapter == null)
 252             mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 253         root.setAdapter(mProfileListAdapter);
 254
 255         mProfileListAdapter.editingProfiles.observe(this, newValue -> {
 256             if (newValue) {
 257                 profileListHeadMore.setVisibility(View.GONE);
 258                 profileListHeadCancel.setVisibility(View.VISIBLE);
 259                 profileListHeadAddProfile.setVisibility(View.VISIBLE);
 260                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 261                     profileListHeadMore.startAnimation(
 262                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 263                     profileListHeadCancel.startAnimation(
 264                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 265                     profileListHeadAddProfile.startAnimation(
 266                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 267                 }
 268             }
 269             else {
 270                 profileListHeadCancel.setVisibility(View.GONE);
 271                 profileListHeadMore.setVisibility(View.VISIBLE);
 272                 profileListHeadAddProfile.setVisibility(View.GONE);
 273                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 274                     profileListHeadCancel.startAnimation(
 275                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 276                     profileListHeadMore.startAnimation(
 277                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 278                     profileListHeadAddProfile.startAnimation(
 279                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 280                 }
 281             }
 282
 283             mProfileListAdapter.notifyDataSetChanged();
 284         });
 285
 286         LinearLayoutManager llm = new LinearLayoutManager(this);
 287
 288         llm.setOrientation(RecyclerView.VERTICAL);
 289         root.setLayoutManager(llm);
 290
 291         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 292         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 293         profileListHeadMoreAndCancel.setOnClickListener(
 294                 (v) -> mProfileListAdapter.flipEditingProfiles());
 295         if (drawerListener == null) {
 296             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 297                 @Override
 298                 public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
 299                     if (slideOffset > 0.2)
 300                         fabHide();
 301                 }
 302                 @Override
 303                 public void onDrawerClosed(View drawerView) {
 304                     super.onDrawerClosed(drawerView);
 305                     mProfileListAdapter.setAnimationsEnabled(false);
 306                     mProfileListAdapter.editingProfiles.setValue(false);
 307                     Data.drawerOpen.setValue(false);
 308                     fabShouldShow();
 309                 }
 310                 @Override
 311                 public void onDrawerOpened(View drawerView) {
 312                     super.onDrawerOpened(drawerView);
 313                     mProfileListAdapter.setAnimationsEnabled(true);
 314                     Data.drawerOpen.setValue(true);
 315                     fabHide();
 316                 }
 317             };
 318             drawer.addDrawerListener(drawerListener);
 319         }
 320     }
 321     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 322         long now = new Date().getTime();
 323         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 324             if (lastUpdate == null)
 325                 debug("db::", "WEB data never fetched. scheduling a fetch");
 326             else
 327                 debug("db", String.format(Locale.ENGLISH,
 328                         "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 329                         lastUpdate.getTime() / 1000f, now / 1000f));
 330
 331             Data.scheduleTransactionListRetrieval(this);
 332         }
 333     }
 334     private void createShortcuts(List<MobileLedgerProfile> list) {
 335         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
 336             return;
 337
 338         ShortcutManager sm = getSystemService(ShortcutManager.class);
 339         List<ShortcutInfo> shortcuts = new ArrayList<>();
 340         int i = 0;
 341         for (MobileLedgerProfile p : list) {
 342             if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
 343                 break;
 344
 345             if (!p.isPostingPermitted())
 346                 continue;
 347
 348             ShortcutInfo si =
 349                     new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid()).setShortLabel(
 350                             p.getName())
 351                                                                                     .setIcon(
 352                                                                                             Icon.createWithResource(
 353                                                                                                     this,
 354                                                                                                     R.drawable.svg_thick_plus_white))
 355                                                                                     .setIntent(
 356                                                                                             new Intent(
 357                                                                                                     Intent.ACTION_VIEW,
 358                                                                                                     null,
 359                                                                                                     this,
 360                                                                                                     NewTransactionActivity.class).putExtra(
 361                                                                                                     "profile_uuid",
 362                                                                                                     p.getUuid()))
 363                                                                                     .setRank(i)
 364                                                                                     .build();
 365             shortcuts.add(si);
 366             i++;
 367         }
 368         sm.setDynamicShortcuts(shortcuts);
 369     }
 370     private void onProfileListChanged(List<MobileLedgerProfile> newList) {
 371         if (newList == null) {
 372             // profiles not yet loaded from DB
 373             findViewById(R.id.loading_layout).setVisibility(View.VISIBLE);
 374             findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 375             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 376             return;
 377         }
 378
 379         if (newList.isEmpty()) {
 380             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 381             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 382             findViewById(R.id.loading_layout).setVisibility(View.GONE);
 383             return;
 384         }
 385
 386         findViewById(R.id.main_app_layout).setVisibility(View.VISIBLE);
 387         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 388         findViewById(R.id.loading_layout).setVisibility(View.GONE);
 389
 390         findViewById(R.id.nav_profile_list).setMinimumHeight(
 391                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 392
 393         debug("profiles", "profile list changed");
 394         mProfileListAdapter.notifyDataSetChanged();
 395
 396         createShortcuts(newList);
 397     }
 398     /**
 399      * called when the current profile has changed
 400      */
 401     private void onProfileChanged(MobileLedgerProfile profile) {
 402         boolean haveProfile = profile != null;
 403
 404         if (haveProfile)
 405             setTitle(profile.getName());
 406         else
 407             setTitle(R.string.app_name);
 408
 409         this.profile = profile;
 410
 411         int newProfileTheme = haveProfile ? profile.getThemeHue() : -1;
 412         if (newProfileTheme != Colors.profileThemeId) {
 413             debug("profiles",
 414                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 415                             newProfileTheme));
 416             Colors.profileThemeId = newProfileTheme;
 417             profileThemeChanged();
 418             // profileThemeChanged would restart the activity, so no need to reload the
 419             // data sets below
 420             return;
 421         }
 422
 423         findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 424         findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 425
 426         mProfileListAdapter.notifyDataSetChanged();
 427
 428         drawer.closeDrawers();
 429
 430         Data.transactions.clear();
 431         debug("transactions", "requesting list reload");
 432         TransactionListViewModel.scheduleTransactionListReload();
 433
 434         Data.accounts.clear();
 435         AccountSummaryViewModel.scheduleAccountListReload();
 436
 437         if (haveProfile) {
 438             if (profile.isPostingPermitted()) {
 439                 mToolbar.setSubtitle(null);
 440                 fab.show();
 441             }
 442             else {
 443                 mToolbar.setSubtitle(R.string.profile_subtitle_read_only);
 444                 fab.hide();
 445             }
 446         }
 447         else {
 448             mToolbar.setSubtitle(null);
 449             fab.hide();
 450         }
 451
 452         updateLastUpdateTextFromDB();
 453     }
 454     private void updateLastUpdateDisplay(Date newValue) {
 455         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 456         TextView v = findViewById(R.id.transactions_last_update);
 457         if (newValue == null) {
 458             l.setVisibility(View.INVISIBLE);
 459             debug("main", "no last update date :(");
 460         }
 461         else {
 462             final String text = DateFormat.getDateTimeInstance()
 463                                           .format(newValue);
 464             v.setText(text);
 465             l.setVisibility(View.VISIBLE);
 466             debug("main", String.format("Date formatted: %s", text));
 467         }
 468
 469         scheduleDataRetrievalIfStale(newValue);
 470     }
 471     private void profileThemeChanged() {
 472         storeThemeIdInPrefs(profile.getThemeHue());
 473
 474         // un-hook all observed LiveData
 475         Data.profile.removeObservers(this);
 476         Data.profiles.removeObservers(this);
 477         Data.lastUpdateDate.removeObservers(this);
 478
 479         recreate();
 480     }
 481     private void storeThemeIdInPrefs(int themeId) {
 482         // store the new theme id in the preferences
 483         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 484         SharedPreferences.Editor e = prefs.edit();
 485         e.putInt(PREF_THEME_ID, themeId);
 486         e.apply();
 487     }
 488     public void startEditProfileActivity(MobileLedgerProfile profile) {
 489         Intent intent = new Intent(this, ProfileDetailActivity.class);
 490         Bundle args = new Bundle();
 491         if (profile != null) {
 492             int index = Data.getProfileIndex(profile);
 493             if (index != -1)
 494                 intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 495         }
 496         intent.putExtras(args);
 497         startActivity(intent, args);
 498     }
 499     private void setupProfile() {
 500         MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
 501             @Override
 502             protected void onResult(String profileUUID) {
 503                 MobileLedgerProfile startupProfile;
 504
 505                 startupProfile = Data.getProfile(profileUUID);
 506                 Data.setCurrentProfile(startupProfile);
 507             }
 508         });
 509     }
 510     public void fabNewTransactionClicked(View view) {
 511         Intent intent = new Intent(this, NewTransactionActivity.class);
 512         startActivity(intent);
 513         overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
 514     }
 515     public void markDrawerItemCurrent(int id) {
 516         TextView item = drawer.findViewById(id);
 517         item.setBackgroundColor(Colors.tableRowDarkBG);
 518
 519         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 520         for (int i = 0; i < actions.getChildCount(); i++) {
 521             View view = actions.getChildAt(i);
 522             if (view.getId() != id) {
 523                 view.setBackgroundColor(Color.TRANSPARENT);
 524             }
 525         }
 526     }
 527     public void onAccountSummaryClicked(View view) {
 528         drawer.closeDrawers();
 529
 530         showAccountSummaryFragment();
 531     }
 532     private void showAccountSummaryFragment() {
 533         mViewPager.setCurrentItem(0, true);
 534         Data.accountFilter.setValue(null);
 535     }
 536     public void onLatestTransactionsClicked(View view) {
 537         drawer.closeDrawers();
 538
 539         showTransactionsFragment((String) null);
 540     }
 541     private void showTransactionsFragment(String accName) {
 542         Data.accountFilter.setValue(accName);
 543         mViewPager.setCurrentItem(1, true);
 544     }
 545     private void showTransactionsFragment(LedgerAccount account) {
 546         showTransactionsFragment((account == null) ? null : account.getName());
 547     }
 548     public void showAccountTransactions(LedgerAccount account) {
 549         mBackMeansToAccountList = true;
 550         showTransactionsFragment(account);
 551     }
 552     @Override
 553     public void onBackPressed() {
 554         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 555         if (drawer.isDrawerOpen(GravityCompat.START)) {
 556             drawer.closeDrawer(GravityCompat.START);
 557         }
 558         else {
 559             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 560                 Data.accountFilter.setValue(null);
 561                 showAccountSummaryFragment();
 562                 mBackMeansToAccountList = false;
 563             }
 564             else {
 565                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 566                         getSupportFragmentManager().getBackStackEntryCount()));
 567
 568                 super.onBackPressed();
 569             }
 570         }
 571     }
 572     public void updateLastUpdateTextFromDB() {
 573         if (profile == null)
 574             return;
 575
 576         long last_update = profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
 577
 578         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 579         if (last_update == 0) {
 580             Data.lastUpdateDate.postValue(null);
 581         }
 582         else {
 583             Data.lastUpdateDate.postValue(new Date(last_update));
 584         }
 585     }
 586     public void onStopTransactionRefreshClick(View view) {
 587         debug("interactive", "Cancelling transactions refresh");
 588         Data.stopTransactionsRetrieval();
 589         bTransactionListCancelDownload.setEnabled(false);
 590     }
 591     public void onRetrieveDone(String error) {
 592         Data.transactionRetrievalDone();
 593         findViewById(R.id.transaction_progress_layout).setVisibility(View.GONE);
 594
 595         if (error == null) {
 596             updateLastUpdateTextFromDB();
 597
 598             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 599             TransactionListViewModel.scheduleTransactionListReload();
 600         }
 601         else
 602             Snackbar.make(mViewPager, error, Snackbar.LENGTH_LONG)
 603                     .show();
 604     }
 605     public void onRetrieveStart() {
 606         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 607         bTransactionListCancelDownload.setEnabled(true);
 608         ColorStateList csl = Colors.getColorStateList();
 609         progressBar.setIndeterminateTintList(csl);
 610         progressBar.setProgressTintList(csl);
 611         progressBar.setIndeterminate(true);
 612         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 613             progressBar.setProgress(0, false);
 614         else
 615             progressBar.setProgress(0);
 616         findViewById(R.id.transaction_progress_layout).setVisibility(View.VISIBLE);
 617     }
 618     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 619         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 620         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 621             (progress.getTotal() == 0))
 622         {
 623             progressBar.setIndeterminate(true);
 624         }
 625         else {
 626             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 627                 progressBar.setMin(0);
 628             }
 629             progressBar.setMax(progress.getTotal());
 630             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 631                 progressBar.setProgress(progress.getProgress(), true);
 632             }
 633             else
 634                 progressBar.setProgress(progress.getProgress());
 635             progressBar.setIndeterminate(false);
 636         }
 637     }
 638     public void fabShouldShow() {
 639         if ((profile != null) && profile.isPostingPermitted() && !drawer.isOpen())
 640             fab.show();
 641         else
 642             fabHide();
 643     }
 644     public void fabHide() {
 645         fab.hide();
 646     }
 647     public void onAccountSummaryRowViewClicked(View view) {
 648         ViewGroup row;
 649         switch (view.getId()) {
 650             case R.id.account_expander:
 651                 row = (ViewGroup) view.getParent()
 652                                       .getParent()
 653                                       .getParent();
 654                 break;
 655             case R.id.account_expander_container:
 656             case R.id.account_row_acc_name:
 657                 row = (ViewGroup) view.getParent()
 658                                       .getParent();
 659                 break;
 660             default:
 661                 row = (ViewGroup) view.getParent();
 662                 break;
 663         }
 664
 665         LedgerAccount acc = (LedgerAccount) row.getTag();
 666         switch (view.getId()) {
 667             case R.id.account_row_acc_name:
 668             case R.id.account_expander:
 669             case R.id.account_expander_container:
 670                 debug("accounts", "Account expander clicked");
 671                 if (!acc.hasSubAccounts())
 672                     return;
 673
 674                 boolean wasExpanded = acc.isExpanded();
 675
 676                 View arrow = row.findViewById(R.id.account_expander_container);
 677
 678                 arrow.clearAnimation();
 679                 ViewPropertyAnimator animator = arrow.animate();
 680
 681                 acc.toggleExpanded();
 682                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 683                         new Object[]{acc.isExpanded(), acc.getName(), profile.getUuid()
 684                         });
 685
 686                 if (wasExpanded) {
 687                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 688                     arrow.setRotation(0);
 689                     animator.rotationBy(180);
 690
 691                     // removing all child accounts from the view
 692                     int start = -1, count = 0;
 693                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 694                         for (int i = 0; i < Data.accounts.size(); i++) {
 695                             if (acc.isParentOf(Data.accounts.get(i))) {
 696 //                                debug("accounts", String.format("Found a child '%s' at position
 697 //                                %d",
 698 //                                        Data.accounts.get(i).getName(), i));
 699                                 if (start == -1) {
 700                                     start = i;
 701                                 }
 702                                 count++;
 703                             }
 704                             else {
 705                                 if (start != -1) {
 706 //                                    debug("accounts",
 707 //                                            String.format("Found a non-child '%s' at position %d",
 708 //                                                    Data.accounts.get(i).getName(), i));
 709                                     break;
 710                                 }
 711                             }
 712                         }
 713
 714                         if (start != -1) {
 715                             for (int j = 0; j < count; j++) {
 716 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 717 //                                        Data.accounts.get(start).getName()));
 718                                 Data.accounts.removeQuietly(start);
 719                             }
 720
 721                             mAccountSummaryFragment.modelAdapter.notifyItemRangeRemoved(start,
 722                                     count);
 723                         }
 724                     }
 725                 }
 726                 else {
 727                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 728                     arrow.setRotation(180);
 729                     animator.rotationBy(-180);
 730                     List<LedgerAccount> children = profile.loadVisibleChildAccountsOf(acc);
 731                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 732                         int parentPos = Data.accounts.indexOf(acc);
 733                         if (parentPos != -1) {
 734                             // may have disappeared in a concurrent refresh operation
 735                             Data.accounts.addAllQuietly(parentPos + 1, children);
 736                             mAccountSummaryFragment.modelAdapter.notifyItemRangeInserted(
 737                                     parentPos + 1, children.size());
 738                         }
 739                     }
 740                 }
 741                 break;
 742             case R.id.account_row_acc_amounts:
 743                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 744                     acc.toggleAmountsExpanded();
 745                     DbOpQueue.add(
 746                             "update accounts set amounts_expanded=? where name=? and profile=?",
 747                             new Object[]{acc.amountsExpanded(), acc.getName(), profile.getUuid()
 748                             });
 749                     Data.accounts.triggerItemChangedNotification(acc);
 750                 }
 751                 break;
 752         }
 753     }
 754
 755     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 756
 757         SectionsPagerAdapter(FragmentManager fm) {
 758             super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
 759         }
 760
 761         @NotNull
 762         @Override
 763         public Fragment getItem(int position) {
 764             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 765             switch (position) {
 766                 case 0:
 767 //                    debug("flow", "Creating account summary fragment");
 768                     return mAccountSummaryFragment = new AccountSummaryFragment();
 769                 case 1:
 770                     return new TransactionListFragment();
 771                 default:
 772                     throw new IllegalStateException(
 773                             String.format("Unexpected fragment index: " + "%d", position));
 774             }
 775         }
 776
 777         @Override
 778         public int getCount() {
 779             return 2;
 780         }
 781     }
 782 }