app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java

   1 /*
   2  * Copyright © 2020 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.Logger;
  73 import net.ktnx.mobileledger.utils.MLDB;
  74
  75 import org.jetbrains.annotations.NotNull;
  76
  77 import java.text.DateFormat;
  78 import java.util.ArrayList;
  79 import java.util.Date;
  80 import java.util.List;
  81 import java.util.Locale;
  82
  83 import static net.ktnx.mobileledger.utils.Logger.debug;
  84
  85 /*
  86  * TODO: reports
  87  *  */
  88
  89 public class MainActivity extends ProfileThemedActivity {
  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 String PREF_THEME_ID = "themeId";
  94     public AccountSummaryFragment mAccountSummaryFragment;
  95     DrawerLayout drawer;
  96     private View profileListHeadMore, profileListHeadCancel, profileListHeadAddProfile;
  97     private View bTransactionListCancelDownload;
  98     private SectionsPagerAdapter mSectionsPagerAdapter;
  99     private ViewPager mViewPager;
 100     private FloatingActionButton fab;
 101     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 102     private int mCurrentPage;
 103     private boolean mBackMeansToAccountList = false;
 104     private Toolbar mToolbar;
 105     private DrawerLayout.SimpleDrawerListener drawerListener;
 106     private ActionBarDrawerToggle barDrawerToggle;
 107     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 108     private MobileLedgerProfile profile;
 109     @Override
 110     protected void onStart() {
 111         super.onStart();
 112
 113         Logger.debug("MainActivity", "onStart()");
 114
 115         mViewPager.setCurrentItem(mCurrentPage, false);
 116     }
 117     @Override
 118     protected void onSaveInstanceState(@NotNull Bundle outState) {
 119         super.onSaveInstanceState(outState);
 120         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 121         if (Data.accountFilter.getValue() != null)
 122             outState.putString(STATE_ACC_FILTER, Data.accountFilter.getValue());
 123     }
 124     @Override
 125     protected void onDestroy() {
 126         mSectionsPagerAdapter = null;
 127         RecyclerView root = findViewById(R.id.nav_profile_list);
 128         if (root != null)
 129             root.setAdapter(null);
 130         if (drawer != null)
 131             drawer.removeDrawerListener(drawerListener);
 132         drawerListener = null;
 133         if (drawer != null)
 134             drawer.removeDrawerListener(barDrawerToggle);
 135         barDrawerToggle = null;
 136         if (mViewPager != null)
 137             mViewPager.removeOnPageChangeListener(pageChangeListener);
 138         pageChangeListener = null;
 139         super.onDestroy();
 140     }
 141     @Override
 142     protected void setupProfileColors() {
 143         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 144         int profileColor = prefs.getInt(PREF_THEME_ID, -2);
 145         if (profileColor == -2)
 146             profileColor = Data.retrieveCurrentThemeIdFromDb();
 147         Colors.setupTheme(this, profileColor);
 148         Colors.profileThemeId = profileColor;
 149         storeThemeIdInPrefs(profileColor);
 150     }
 151     @Override
 152     protected void onResume() {
 153         super.onResume();
 154         fabShouldShow();
 155     }
 156     @Override
 157     protected void onCreate(Bundle savedInstanceState) {
 158         debug("MainActivity", "onCreate()/entry");
 159         super.onCreate(savedInstanceState);
 160         debug("MainActivity", "onCreate()/after super");
 161         setContentView(R.layout.activity_main);
 162
 163         fab = findViewById(R.id.btn_add_transaction);
 164         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 165         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 166         LinearLayout profileListHeadMoreAndCancel =
 167                 findViewById(R.id.nav_profile_list_head_buttons);
 168         profileListHeadAddProfile = findViewById(R.id.nav_new_profile_button);
 169         drawer = findViewById(R.id.drawer_layout);
 170         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 171         mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
 172         mViewPager = findViewById(R.id.root_frame);
 173
 174         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 175         if (extra != null && savedInstanceState == null)
 176             savedInstanceState = extra;
 177
 178
 179         mToolbar = findViewById(R.id.toolbar);
 180         setSupportActionBar(mToolbar);
 181
 182         Data.profile.observe(this, this::onProfileChanged);
 183
 184         Data.profiles.observe(this, this::onProfileListChanged);
 185
 186         if (barDrawerToggle == null) {
 187             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 188                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 189             drawer.addDrawerListener(barDrawerToggle);
 190         }
 191         barDrawerToggle.syncState();
 192
 193         try {
 194             PackageInfo pi = getApplicationContext().getPackageManager()
 195                                                     .getPackageInfo(getPackageName(), 0);
 196             ((TextView) findViewById(R.id.nav_upper).findViewById(
 197                     R.id.drawer_version_text)).setText(pi.versionName);
 198             ((TextView) findViewById(R.id.no_profiles_layout).findViewById(
 199                     R.id.drawer_version_text)).setText(pi.versionName);
 200         }
 201         catch (Exception e) {
 202             e.printStackTrace();
 203         }
 204
 205         markDrawerItemCurrent(R.id.nav_account_summary);
 206
 207         mViewPager.setAdapter(mSectionsPagerAdapter);
 208
 209         if (pageChangeListener == null) {
 210             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 211                 @Override
 212                 public void onPageSelected(int position) {
 213                     mCurrentPage = position;
 214                     switch (position) {
 215                         case 0:
 216                             markDrawerItemCurrent(R.id.nav_account_summary);
 217                             break;
 218                         case 1:
 219                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 220                             break;
 221                         default:
 222                             Log.e("MainActivity",
 223                                     String.format("Unexpected page index %d", position));
 224                     }
 225
 226                     super.onPageSelected(position);
 227                 }
 228             };
 229             mViewPager.addOnPageChangeListener(pageChangeListener);
 230         }
 231
 232         mCurrentPage = 0;
 233         if (savedInstanceState != null) {
 234             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 235             if (currentPage != -1) {
 236                 mCurrentPage = currentPage;
 237             }
 238             Data.accountFilter.setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
 239         }
 240
 241         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 242
 243         findViewById(R.id.btn_no_profiles_add).setOnClickListener(
 244                 v -> startEditProfileActivity(null));
 245
 246         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 247
 248         findViewById(R.id.nav_new_profile_button).setOnClickListener(
 249                 v -> startEditProfileActivity(null));
 250
 251         RecyclerView root = findViewById(R.id.nav_profile_list);
 252         if (root == null)
 253             throw new RuntimeException("Can't get hold on the transaction value view");
 254
 255         if (mProfileListAdapter == null)
 256             mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 257         root.setAdapter(mProfileListAdapter);
 258
 259         mProfileListAdapter.editingProfiles.observe(this, newValue -> {
 260             if (newValue) {
 261                 profileListHeadMore.setVisibility(View.GONE);
 262                 profileListHeadCancel.setVisibility(View.VISIBLE);
 263                 profileListHeadAddProfile.setVisibility(View.VISIBLE);
 264                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 265                     profileListHeadMore.startAnimation(
 266                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 267                     profileListHeadCancel.startAnimation(
 268                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 269                     profileListHeadAddProfile.startAnimation(
 270                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 271                 }
 272             }
 273             else {
 274                 profileListHeadCancel.setVisibility(View.GONE);
 275                 profileListHeadMore.setVisibility(View.VISIBLE);
 276                 profileListHeadAddProfile.setVisibility(View.GONE);
 277                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 278                     profileListHeadCancel.startAnimation(
 279                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 280                     profileListHeadMore.startAnimation(
 281                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 282                     profileListHeadAddProfile.startAnimation(
 283                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 284                 }
 285             }
 286
 287             mProfileListAdapter.notifyDataSetChanged();
 288         });
 289
 290         LinearLayoutManager llm = new LinearLayoutManager(this);
 291
 292         llm.setOrientation(RecyclerView.VERTICAL);
 293         root.setLayoutManager(llm);
 294
 295         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 296         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 297         profileListHeadMoreAndCancel.setOnClickListener(
 298                 (v) -> mProfileListAdapter.flipEditingProfiles());
 299         if (drawerListener == null) {
 300             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 301                 @Override
 302                 public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
 303                     if (slideOffset > 0.2)
 304                         fabHide();
 305                 }
 306                 @Override
 307                 public void onDrawerClosed(View drawerView) {
 308                     super.onDrawerClosed(drawerView);
 309                     mProfileListAdapter.setAnimationsEnabled(false);
 310                     mProfileListAdapter.editingProfiles.setValue(false);
 311                     Data.drawerOpen.setValue(false);
 312                     fabShouldShow();
 313                 }
 314                 @Override
 315                 public void onDrawerOpened(View drawerView) {
 316                     super.onDrawerOpened(drawerView);
 317                     mProfileListAdapter.setAnimationsEnabled(true);
 318                     Data.drawerOpen.setValue(true);
 319                     fabHide();
 320                 }
 321             };
 322             drawer.addDrawerListener(drawerListener);
 323         }
 324
 325         Data.drawerOpen.observe(this, open -> {
 326             if (open)
 327                 drawer.open();
 328             else
 329                 drawer.close();
 330         });
 331     }
 332     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 333         long now = new Date().getTime();
 334         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 335             if (lastUpdate == null)
 336                 debug("db::", "WEB data never fetched. scheduling a fetch");
 337             else
 338                 debug("db", String.format(Locale.ENGLISH,
 339                         "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 340                         lastUpdate.getTime() / 1000f, now / 1000f));
 341
 342             Data.scheduleTransactionListRetrieval(this);
 343         }
 344     }
 345     private void createShortcuts(List<MobileLedgerProfile> 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 (MobileLedgerProfile p : list) {
 353             if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
 354                 break;
 355
 356             if (!p.isPostingPermitted())
 357                 continue;
 358
 359             final ShortcutInfo.Builder builder =
 360                     new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid());
 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("profile_uuid",
 366                                              p.getUuid()))
 367                                      .setRank(i)
 368                                      .build();
 369             shortcuts.add(si);
 370             i++;
 371         }
 372         sm.setDynamicShortcuts(shortcuts);
 373     }
 374     private void onProfileListChanged(List<MobileLedgerProfile> newList) {
 375         if ((newList == null) || newList.isEmpty()) {
 376             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 377             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 378             return;
 379         }
 380
 381         findViewById(R.id.main_app_layout).setVisibility(View.VISIBLE);
 382         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 383
 384         findViewById(R.id.nav_profile_list).setMinimumHeight(
 385                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 386
 387         debug("profiles", "profile list changed");
 388         mProfileListAdapter.notifyDataSetChanged();
 389
 390         createShortcuts(newList);
 391     }
 392     /**
 393      * called when the current profile has changed
 394      */
 395     private void onProfileChanged(MobileLedgerProfile profile) {
 396         boolean haveProfile = profile != null;
 397
 398         if (haveProfile)
 399             setTitle(profile.getName());
 400         else
 401             setTitle(R.string.app_name);
 402
 403         this.profile = profile;
 404
 405         int newProfileTheme = haveProfile ? profile.getThemeHue() : -1;
 406         if (newProfileTheme != Colors.profileThemeId) {
 407             debug("profiles",
 408                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 409                             newProfileTheme));
 410             Colors.profileThemeId = newProfileTheme;
 411             profileThemeChanged();
 412             // profileThemeChanged would restart the activity, so no need to reload the
 413             // data sets below
 414             return;
 415         }
 416
 417         findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 418         findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 419
 420         mProfileListAdapter.notifyDataSetChanged();
 421
 422         Data.transactions.clear();
 423         debug("transactions", "requesting list reload");
 424         TransactionListViewModel.scheduleTransactionListReload();
 425
 426         Data.accounts.clear();
 427         AccountSummaryViewModel.scheduleAccountListReload();
 428
 429         if (haveProfile) {
 430             if (profile.isPostingPermitted()) {
 431                 mToolbar.setSubtitle(null);
 432                 fab.show();
 433             }
 434             else {
 435                 mToolbar.setSubtitle(R.string.profile_subtitle_read_only);
 436                 fab.hide();
 437             }
 438         }
 439         else {
 440             mToolbar.setSubtitle(null);
 441             fab.hide();
 442         }
 443
 444         updateLastUpdateTextFromDB();
 445     }
 446     private void updateLastUpdateDisplay(Date newValue) {
 447         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 448         TextView v = findViewById(R.id.transactions_last_update);
 449         if (newValue == null) {
 450             l.setVisibility(View.INVISIBLE);
 451             debug("main", "no last update date :(");
 452         }
 453         else {
 454             final String text = DateFormat.getDateTimeInstance()
 455                                           .format(newValue);
 456             v.setText(text);
 457             l.setVisibility(View.VISIBLE);
 458             debug("main", String.format("Date formatted: %s", text));
 459         }
 460
 461         scheduleDataRetrievalIfStale(newValue);
 462     }
 463     private void profileThemeChanged() {
 464         storeThemeIdInPrefs(profile.getThemeHue());
 465
 466         // un-hook all observed LiveData
 467         Data.profile.removeObservers(this);
 468         Data.profiles.removeObservers(this);
 469         Data.lastUpdateDate.removeObservers(this);
 470
 471         recreate();
 472     }
 473     private void storeThemeIdInPrefs(int themeId) {
 474         // store the new theme id in the preferences
 475         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 476         SharedPreferences.Editor e = prefs.edit();
 477         e.putInt(PREF_THEME_ID, themeId);
 478         e.apply();
 479     }
 480     public void startEditProfileActivity(MobileLedgerProfile profile) {
 481         Intent intent = new Intent(this, ProfileDetailActivity.class);
 482         Bundle args = new Bundle();
 483         if (profile != null) {
 484             int index = Data.getProfileIndex(profile);
 485             if (index != -1)
 486                 intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 487         }
 488         intent.putExtras(args);
 489         startActivity(intent, args);
 490     }
 491     private void setupProfile() {
 492         MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
 493             @Override
 494             protected void onResult(String profileUUID) {
 495                 MobileLedgerProfile startupProfile;
 496
 497                 startupProfile = Data.getProfile(profileUUID);
 498                 Data.setCurrentProfile(startupProfile);
 499             }
 500         });
 501     }
 502     public void fabNewTransactionClicked(View view) {
 503         Intent intent = new Intent(this, NewTransactionActivity.class);
 504         startActivity(intent);
 505         overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
 506     }
 507     public void markDrawerItemCurrent(int id) {
 508         TextView item = drawer.findViewById(id);
 509         item.setBackgroundColor(Colors.tableRowDarkBG);
 510
 511         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 512         for (int i = 0; i < actions.getChildCount(); i++) {
 513             View view = actions.getChildAt(i);
 514             if (view.getId() != id) {
 515                 view.setBackgroundColor(Color.TRANSPARENT);
 516             }
 517         }
 518     }
 519     public void onAccountSummaryClicked(View view) {
 520         drawer.closeDrawers();
 521
 522         showAccountSummaryFragment();
 523     }
 524     private void showAccountSummaryFragment() {
 525         mViewPager.setCurrentItem(0, true);
 526         Data.accountFilter.setValue(null);
 527     }
 528     public void onLatestTransactionsClicked(View view) {
 529         drawer.closeDrawers();
 530
 531         showTransactionsFragment((String) null);
 532     }
 533     private void showTransactionsFragment(String accName) {
 534         Data.accountFilter.setValue(accName);
 535         mViewPager.setCurrentItem(1, true);
 536     }
 537     private void showTransactionsFragment(LedgerAccount account) {
 538         showTransactionsFragment((account == null) ? null : account.getName());
 539     }
 540     public void showAccountTransactions(LedgerAccount account) {
 541         mBackMeansToAccountList = true;
 542         showTransactionsFragment(account);
 543     }
 544     @Override
 545     public void onBackPressed() {
 546         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 547         if (drawer.isDrawerOpen(GravityCompat.START)) {
 548             drawer.closeDrawer(GravityCompat.START);
 549         }
 550         else {
 551             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 552                 Data.accountFilter.setValue(null);
 553                 showAccountSummaryFragment();
 554                 mBackMeansToAccountList = false;
 555             }
 556             else {
 557                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 558                         getSupportFragmentManager().getBackStackEntryCount()));
 559
 560                 super.onBackPressed();
 561             }
 562         }
 563     }
 564     public void updateLastUpdateTextFromDB() {
 565         if (profile == null)
 566             return;
 567
 568         long last_update = profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
 569
 570         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 571         if (last_update == 0) {
 572             Data.lastUpdateDate.postValue(null);
 573         }
 574         else {
 575             Data.lastUpdateDate.postValue(new Date(last_update));
 576         }
 577     }
 578     public void onStopTransactionRefreshClick(View view) {
 579         debug("interactive", "Cancelling transactions refresh");
 580         Data.stopTransactionsRetrieval();
 581         bTransactionListCancelDownload.setEnabled(false);
 582     }
 583     public void onRetrieveDone(String error) {
 584         Data.transactionRetrievalDone();
 585         findViewById(R.id.transaction_progress_layout).setVisibility(View.GONE);
 586
 587         if (error == null) {
 588             updateLastUpdateTextFromDB();
 589
 590             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 591             TransactionListViewModel.scheduleTransactionListReload();
 592         }
 593         else
 594             Snackbar.make(mViewPager, error, Snackbar.LENGTH_LONG)
 595                     .show();
 596     }
 597     public void onRetrieveStart() {
 598         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 599         bTransactionListCancelDownload.setEnabled(true);
 600         ColorStateList csl = Colors.getColorStateList();
 601         progressBar.setIndeterminateTintList(csl);
 602         progressBar.setProgressTintList(csl);
 603         progressBar.setIndeterminate(true);
 604         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 605             progressBar.setProgress(0, false);
 606         else
 607             progressBar.setProgress(0);
 608         findViewById(R.id.transaction_progress_layout).setVisibility(View.VISIBLE);
 609     }
 610     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 611         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 612         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 613             (progress.getTotal() == 0))
 614         {
 615             progressBar.setIndeterminate(true);
 616         }
 617         else {
 618             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 619                 progressBar.setMin(0);
 620             }
 621             progressBar.setMax(progress.getTotal());
 622             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 623                 progressBar.setProgress(progress.getProgress(), true);
 624             }
 625             else
 626                 progressBar.setProgress(progress.getProgress());
 627             progressBar.setIndeterminate(false);
 628         }
 629     }
 630     public void fabShouldShow() {
 631         if ((profile != null) && profile.isPostingPermitted() && !drawer.isOpen())
 632             fab.show();
 633         else
 634             fabHide();
 635     }
 636     public void fabHide() {
 637         fab.hide();
 638     }
 639     public void onAccountSummaryRowViewClicked(View view) {
 640         ViewGroup row;
 641         switch (view.getId()) {
 642             case R.id.account_expander:
 643                 row = (ViewGroup) view.getParent()
 644                                       .getParent()
 645                                       .getParent();
 646                 break;
 647             case R.id.account_expander_container:
 648             case R.id.account_row_acc_name:
 649                 row = (ViewGroup) view.getParent()
 650                                       .getParent();
 651                 break;
 652             default:
 653                 row = (ViewGroup) view.getParent();
 654                 break;
 655         }
 656
 657         LedgerAccount acc = (LedgerAccount) row.getTag();
 658         switch (view.getId()) {
 659             case R.id.account_row_acc_name:
 660             case R.id.account_expander:
 661             case R.id.account_expander_container:
 662                 debug("accounts", "Account expander clicked");
 663                 if (!acc.hasSubAccounts())
 664                     return;
 665
 666                 boolean wasExpanded = acc.isExpanded();
 667
 668                 View arrow = row.findViewById(R.id.account_expander_container);
 669
 670                 arrow.clearAnimation();
 671                 ViewPropertyAnimator animator = arrow.animate();
 672
 673                 acc.toggleExpanded();
 674                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 675                         new Object[]{acc.isExpanded(), acc.getName(), profile.getUuid()
 676                         });
 677
 678                 if (wasExpanded) {
 679                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 680                     arrow.setRotation(0);
 681                     animator.rotationBy(180);
 682
 683                     // removing all child accounts from the view
 684                     int start = -1, count = 0;
 685                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 686                         for (int i = 0; i < Data.accounts.size(); i++) {
 687                             if (acc.isParentOf(Data.accounts.get(i))) {
 688 //                                debug("accounts", String.format("Found a child '%s' at position
 689 //                                %d",
 690 //                                        Data.accounts.get(i).getName(), i));
 691                                 if (start == -1) {
 692                                     start = i;
 693                                 }
 694                                 count++;
 695                             }
 696                             else {
 697                                 if (start != -1) {
 698 //                                    debug("accounts",
 699 //                                            String.format("Found a non-child '%s' at position %d",
 700 //                                                    Data.accounts.get(i).getName(), i));
 701                                     break;
 702                                 }
 703                             }
 704                         }
 705
 706                         if (start != -1) {
 707                             for (int j = 0; j < count; j++) {
 708 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 709 //                                        Data.accounts.get(start).getName()));
 710                                 Data.accounts.removeQuietly(start);
 711                             }
 712
 713                             mAccountSummaryFragment.modelAdapter.notifyItemRangeRemoved(start,
 714                                     count);
 715                         }
 716                     }
 717                 }
 718                 else {
 719                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 720                     arrow.setRotation(180);
 721                     animator.rotationBy(-180);
 722                     List<LedgerAccount> children = profile.loadVisibleChildAccountsOf(acc);
 723                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 724                         int parentPos = Data.accounts.indexOf(acc);
 725                         if (parentPos != -1) {
 726                             // may have disappeared in a concurrent refresh operation
 727                             Data.accounts.addAllQuietly(parentPos + 1, children);
 728                             mAccountSummaryFragment.modelAdapter.notifyItemRangeInserted(
 729                                     parentPos + 1, children.size());
 730                         }
 731                     }
 732                 }
 733                 break;
 734             case R.id.account_row_acc_amounts:
 735                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 736                     acc.toggleAmountsExpanded();
 737                     DbOpQueue.add(
 738                             "update accounts set amounts_expanded=? where name=? and profile=?",
 739                             new Object[]{acc.amountsExpanded(), acc.getName(), profile.getUuid()
 740                             });
 741                     Data.accounts.triggerItemChangedNotification(acc);
 742                 }
 743                 break;
 744         }
 745     }
 746
 747     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 748
 749         SectionsPagerAdapter(FragmentManager fm) {
 750             super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
 751         }
 752
 753         @NotNull
 754         @Override
 755         public Fragment getItem(int position) {
 756             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 757             switch (position) {
 758                 case 0:
 759 //                    debug("flow", "Creating account summary fragment");
 760                     return mAccountSummaryFragment = new AccountSummaryFragment();
 761                 case 1:
 762                     return new TransactionListFragment();
 763                 default:
 764                     throw new IllegalStateException(
 765                             String.format("Unexpected fragment index: " + "%d", position));
 766             }
 767         }
 768
 769         @Override
 770         public int getCount() {
 771             return 2;
 772         }
 773     }
 774 }