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.pm.PackageInfo;
  22 import android.content.pm.ShortcutInfo;
  23 import android.content.pm.ShortcutManager;
  24 import android.content.res.ColorStateList;
  25 import android.graphics.Color;
  26 import android.graphics.drawable.Icon;
  27 import android.os.AsyncTask;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.util.Log;
  31 import android.view.View;
  32 import android.view.ViewGroup;
  33 import android.view.ViewPropertyAnimator;
  34 import android.view.animation.Animation;
  35 import android.view.animation.AnimationUtils;
  36 import android.widget.LinearLayout;
  37 import android.widget.ProgressBar;
  38 import android.widget.TextView;
  39 import android.widget.Toast;
  40
  41 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  42
  43 import net.ktnx.mobileledger.R;
  44 import net.ktnx.mobileledger.async.DbOpQueue;
  45 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  46 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  47 import net.ktnx.mobileledger.model.Data;
  48 import net.ktnx.mobileledger.model.LedgerAccount;
  49 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  50 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
  51 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  52 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
  53 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  54 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  55 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  56 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  57 import net.ktnx.mobileledger.utils.Colors;
  58 import net.ktnx.mobileledger.utils.LockHolder;
  59 import net.ktnx.mobileledger.utils.Logger;
  60 import net.ktnx.mobileledger.utils.MLDB;
  61
  62 import org.jetbrains.annotations.NotNull;
  63
  64 import java.lang.ref.WeakReference;
  65 import java.text.DateFormat;
  66 import java.util.ArrayList;
  67 import java.util.Date;
  68 import java.util.List;
  69 import java.util.Locale;
  70 import java.util.Observer;
  71
  72 import androidx.appcompat.app.ActionBarDrawerToggle;
  73 import androidx.appcompat.widget.Toolbar;
  74 import androidx.core.view.GravityCompat;
  75 import androidx.drawerlayout.widget.DrawerLayout;
  76 import androidx.fragment.app.Fragment;
  77 import androidx.fragment.app.FragmentManager;
  78 import androidx.fragment.app.FragmentPagerAdapter;
  79 import androidx.recyclerview.widget.LinearLayoutManager;
  80 import androidx.recyclerview.widget.RecyclerView;
  81 import androidx.viewpager.widget.ViewPager;
  82
  83 import static net.ktnx.mobileledger.utils.Logger.debug;
  84
  85 public class MainActivity extends ProfileThemedActivity {
  86     public static final String STATE_CURRENT_PAGE = "current_page";
  87     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  88     public static final String STATE_ACC_FILTER = "account_filter";
  89     public AccountSummaryFragment mAccountSummaryFragment;
  90     DrawerLayout drawer;
  91     private LinearLayout profileListContainer;
  92     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  93     private FragmentManager fragmentManager;
  94     private RetrieveTransactionsTask retrieveTransactionsTask;
  95     private View bTransactionListCancelDownload;
  96     private ProgressBar progressBar;
  97     private LinearLayout progressLayout;
  98     private SectionsPagerAdapter mSectionsPagerAdapter;
  99     private ViewPager mViewPager;
 100     private FloatingActionButton fab;
 101     private boolean profileListExpanded = false;
 102     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 103     private int mCurrentPage;
 104     private String mAccountFilter;
 105     private boolean mBackMeansToAccountList = false;
 106     private Observer profileObserver;
 107     private Observer profilesObserver;
 108     private Toolbar mToolbar;
 109     private DrawerLayout.SimpleDrawerListener drawerListener;
 110     private ActionBarDrawerToggle barDrawerToggle;
 111     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 112     private Observer editingProfilesObserver;
 113     @Override
 114     protected void onStart() {
 115         super.onStart();
 116
 117         debug("flow", "MainActivity.onStart()");
 118         mViewPager.setCurrentItem(mCurrentPage, false);
 119         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 120         else Data.accountFilter.setValue(null);
 121
 122     }
 123     @Override
 124     protected void onSaveInstanceState(@NotNull Bundle outState) {
 125         super.onSaveInstanceState(outState);
 126         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 127         if (mAccountFilter != null) outState.putString(STATE_ACC_FILTER, mAccountFilter);
 128     }
 129     @Override
 130     protected void onDestroy() {
 131         mSectionsPagerAdapter = null;
 132         Data.profile.deleteObserver(profileObserver);
 133         profileObserver = null;
 134         Data.profiles.deleteObserver(profilesObserver);
 135         profilesObserver = null;
 136         RecyclerView root = findViewById(R.id.nav_profile_list);
 137         if (root != null) root.setAdapter(null);
 138         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 139         drawerListener = null;
 140         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 141         barDrawerToggle = null;
 142         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 143         pageChangeListener = null;
 144         if (mProfileListAdapter != null)
 145             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 146         editingProfilesObserver = null;
 147         super.onDestroy();
 148     }
 149     @Override
 150     protected void onCreate(Bundle savedInstanceState) {
 151         super.onCreate(savedInstanceState);
 152         debug("flow", "MainActivity.onCreate()");
 153         int profileColor = Data.retrieveCurrentThemeIdFromDb();
 154         Colors.setupTheme(this, profileColor);
 155         Colors.profileThemeId = profileColor;
 156         setContentView(R.layout.activity_main);
 157
 158         fab = findViewById(R.id.btn_add_transaction);
 159         profileListContainer = findViewById(R.id.nav_profile_list_container);
 160         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 161         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 162         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 163         LinearLayout profileListHeadMoreAndCancel =
 164                 findViewById(R.id.nav_profile_list_head_buttons);
 165         drawer = findViewById(R.id.drawer_layout);
 166         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 167         progressBar = findViewById(R.id.transaction_list_progress_bar);
 168         progressLayout = findViewById(R.id.transaction_progress_layout);
 169         fragmentManager = getSupportFragmentManager();
 170         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 171         mViewPager = findViewById(R.id.root_frame);
 172
 173         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 174         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 175
 176
 177         mToolbar = findViewById(R.id.toolbar);
 178         setSupportActionBar(mToolbar);
 179
 180         if (profileObserver == null) {
 181             profileObserver = (o, arg) -> onProfileChanged(arg);
 182             Data.profile.addObserver(profileObserver);
 183         }
 184
 185         if (profilesObserver == null) {
 186             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 187             Data.profiles.addObserver(profilesObserver);
 188         }
 189
 190         if (barDrawerToggle == null) {
 191             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 192                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 193             drawer.addDrawerListener(barDrawerToggle);
 194         }
 195         barDrawerToggle.syncState();
 196
 197         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 198
 199         try {
 200             PackageInfo pi =
 201                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 202             ver.setText(pi.versionName);
 203         }
 204         catch (Exception e) {
 205             e.printStackTrace();
 206         }
 207
 208         if (progressBar == null)
 209             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 210         if (progressLayout == null) throw new RuntimeException(
 211                 "Can't get hold on the transaction value progress bar layout");
 212
 213         markDrawerItemCurrent(R.id.nav_account_summary);
 214
 215         mViewPager.setAdapter(mSectionsPagerAdapter);
 216
 217         if (pageChangeListener == null) {
 218             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 219                 @Override
 220                 public void onPageSelected(int position) {
 221                     switch (position) {
 222                         case 0:
 223                             markDrawerItemCurrent(R.id.nav_account_summary);
 224                             break;
 225                         case 1:
 226                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 227                             break;
 228                         default:
 229                             Log.e("MainActivity",
 230                                     String.format("Unexpected page index %d", position));
 231                     }
 232
 233                     super.onPageSelected(position);
 234                 }
 235             };
 236             mViewPager.addOnPageChangeListener(pageChangeListener);
 237         }
 238
 239         mCurrentPage = 0;
 240         if (savedInstanceState != null) {
 241             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 242             if (currentPage != -1) {
 243                 mCurrentPage = currentPage;
 244             }
 245             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 246         }
 247         else mAccountFilter = null;
 248
 249         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 250
 251         findViewById(R.id.btn_no_profiles_add)
 252                 .setOnClickListener(v -> startEditProfileActivity(null));
 253
 254         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 255
 256         findViewById(R.id.nav_new_profile_button)
 257                 .setOnClickListener(v -> startEditProfileActivity(null));
 258
 259         RecyclerView root = findViewById(R.id.nav_profile_list);
 260         if (root == null)
 261             throw new RuntimeException("Can't get hold on the transaction value view");
 262
 263         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 264         root.setAdapter(mProfileListAdapter);
 265
 266         if (editingProfilesObserver == null) {
 267             editingProfilesObserver = (o, arg) -> {
 268                 if (mProfileListAdapter.isEditingProfiles()) {
 269                     profileListHeadMore.setVisibility(View.GONE);
 270                     profileListHeadMore
 271                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 272                     profileListHeadCancel.setVisibility(View.VISIBLE);
 273                     profileListHeadCancel
 274                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 275                 }
 276                 else {
 277                     profileListHeadCancel.setVisibility(View.GONE);
 278                     profileListHeadCancel
 279                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 280                     profileListHeadMore.setVisibility(View.GONE);
 281                     if (profileListExpanded) {
 282                         profileListHeadMore.setVisibility(View.VISIBLE);
 283                         profileListHeadMore
 284                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 285                     }
 286                     else profileListHeadMore.setVisibility(View.GONE);
 287                 }
 288             };
 289             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 290         }
 291
 292         LinearLayoutManager llm = new LinearLayoutManager(this);
 293
 294         llm.setOrientation(RecyclerView.VERTICAL);
 295         root.setLayoutManager(llm);
 296
 297         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 298         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 299         profileListHeadMoreAndCancel
 300                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 301
 302         if (drawerListener == null) {
 303             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 304                 @Override
 305                 public void onDrawerClosed(View drawerView) {
 306                     super.onDrawerClosed(drawerView);
 307                     collapseProfileList();
 308                 }
 309             };
 310             drawer.addDrawerListener(drawerListener);
 311         }
 312
 313         findViewById(R.id.nav_profile_list_head_layout)
 314                 .setOnClickListener(this::navProfilesHeadClicked);
 315         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 316         boolean initialStart = Data.profile.get() == null;
 317         setupProfile();
 318         if (!initialStart) onProfileChanged(null);
 319
 320         updateLastUpdateTextFromDB();
 321     }
 322     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 323         long now = new Date().getTime();
 324         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 325             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 326             else debug("db", String.format(Locale.ENGLISH,
 327                     "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 328                     lastUpdate.getTime() / 1000f, now / 1000f));
 329
 330             scheduleTransactionListRetrieval();
 331         }
 332     }
 333     private void createShortcuts() {
 334         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
 335
 336         List<ShortcutInfo> shortcuts = new ArrayList<>();
 337         try (LockHolder ignored = Data.profiles.lockForReading()) {
 338             for (int i = 0; i < Data.profiles.size(); i++) {
 339                 MobileLedgerProfile p = Data.profiles.get(i);
 340                 if (!p.isPostingPermitted()) continue;
 341
 342                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 343                         .setShortLabel(p.getName())
 344                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 345                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 346                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 347                         .setRank(i).build();
 348                 shortcuts.add(si);
 349             }
 350         }
 351         ShortcutManager sm = getSystemService(ShortcutManager.class);
 352         sm.setDynamicShortcuts(shortcuts);
 353     }
 354     private void onProfileListChanged(Object arg) {
 355         findViewById(R.id.nav_profile_list).setMinimumHeight(
 356                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 357                        Data.profiles.size()));
 358
 359         debug("profiles", "profile list changed");
 360         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 361         else mProfileListAdapter.notifyItemChanged((int) arg);
 362
 363         createShortcuts();
 364     }
 365     private void onProfileChanged(Object arg) {
 366         MobileLedgerProfile profile = Data.profile.get();
 367         MainActivity.this.runOnUiThread(() -> {
 368
 369             boolean haveProfile = profile != null;
 370             findViewById(R.id.no_profiles_layout)
 371                     .setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 372             findViewById(R.id.pager_layout)
 373                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 374
 375             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 376             else MainActivity.this.setTitle(profile.getName());
 377             MainActivity.this.updateLastUpdateTextFromDB();
 378             int old_index = -1;
 379             int new_index = -1;
 380             if (arg != null) {
 381                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 382                 old_index = Data.getProfileIndex(old);
 383                 new_index = Data.getProfileIndex(profile);
 384             }
 385
 386             if ((old_index != -1) && (new_index != -1)) {
 387                 mProfileListAdapter.notifyItemChanged(old_index);
 388                 mProfileListAdapter.notifyItemChanged(new_index);
 389             }
 390             else mProfileListAdapter.notifyDataSetChanged();
 391
 392             MainActivity.this.collapseProfileList();
 393
 394             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 395             if (newProfileTheme != Colors.profileThemeId) {
 396                 debug("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 397                         newProfileTheme));
 398                 MainActivity.this.profileThemeChanged();
 399                 Colors.profileThemeId = newProfileTheme;
 400                 // profileThemeChanged would restart the activity, so no need to reload the
 401                 // data sets below
 402                 return;
 403             }
 404             drawer.closeDrawers();
 405
 406             Data.transactions.clear();
 407             debug("transactions", "requesting list reload");
 408             TransactionListViewModel.scheduleTransactionListReload();
 409
 410             Data.accounts.clear();
 411             AccountSummaryViewModel.scheduleAccountListReload();
 412
 413             if (profile == null) {
 414                 mToolbar.setSubtitle(null);
 415                 fab.hide();
 416             }
 417             else {
 418                 if (profile.isPostingPermitted()) {
 419                     mToolbar.setSubtitle(null);
 420                     fab.show();
 421                 }
 422                 else {
 423                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 424                     fab.hide();
 425                 }
 426             }
 427
 428             updateLastUpdateTextFromDB();
 429         });
 430     }
 431     private void updateLastUpdateDisplay(Date newValue) {
 432         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 433         TextView v = findViewById(R.id.transactions_last_update);
 434         if (newValue == null) {
 435             l.setVisibility(View.INVISIBLE);
 436             debug("main", "no last update date :(");
 437         }
 438         else {
 439             final String text = DateFormat.getDateTimeInstance().format(newValue);
 440             v.setText(text);
 441             l.setVisibility(View.VISIBLE);
 442             debug("main", String.format("Date formatted: %s", text));
 443         }
 444
 445         scheduleDataRetrievalIfStale(newValue);
 446     }
 447     @Override
 448     public void finish() {
 449         if (profilesObserver != null) {
 450             Data.profiles.deleteObserver(profilesObserver);
 451             profilesObserver = null;
 452         }
 453
 454         if (profileObserver != null) {
 455             Data.profile.deleteObserver(profileObserver);
 456             profileObserver = null;
 457         }
 458
 459         super.finish();
 460     }
 461     private void profileThemeChanged() {
 462         setupProfileColors();
 463
 464         Bundle bundle = new Bundle();
 465         onSaveInstanceState(bundle);
 466         // restart activity to reflect theme change
 467         finish();
 468         Intent intent = new Intent(this, this.getClass());
 469         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 470         startActivity(intent);
 471     }
 472     public void startEditProfileActivity(MobileLedgerProfile profile) {
 473         Intent intent = new Intent(this, ProfileDetailActivity.class);
 474         Bundle args = new Bundle();
 475         if (profile != null) {
 476             int index = Data.getProfileIndex(profile);
 477             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 478         }
 479         intent.putExtras(args);
 480         startActivity(intent, args);
 481     }
 482     private void setupProfile() {
 483         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 484         MobileLedgerProfile profile;
 485
 486         profile = Data.getProfile(profileUUID);
 487
 488         if (Data.profiles.isEmpty()) {
 489             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 490             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 491             return;
 492         }
 493
 494         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 495         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 496
 497         if (profile == null) profile = Data.profiles.get(0);
 498
 499         if (profile == null) throw new AssertionError("profile must have a value");
 500
 501         Data.setCurrentProfile(profile);
 502     }
 503     public void fabNewTransactionClicked(View view) {
 504         Intent intent = new Intent(this, NewTransactionActivity.class);
 505         startActivity(intent);
 506         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 507     }
 508     public void navSettingsClicked(View view) {
 509         Intent intent = new Intent(this, SettingsActivity.class);
 510         startActivity(intent);
 511         drawer.closeDrawers();
 512     }
 513     public void markDrawerItemCurrent(int id) {
 514         TextView item = drawer.findViewById(id);
 515         item.setBackgroundColor(Colors.tableRowDarkBG);
 516
 517         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 518         for (int i = 0; i < actions.getChildCount(); i++) {
 519             View view = actions.getChildAt(i);
 520             if (view.getId() != id) {
 521                 view.setBackgroundColor(Color.TRANSPARENT);
 522             }
 523         }
 524     }
 525     public void onAccountSummaryClicked(View view) {
 526         drawer.closeDrawers();
 527
 528         showAccountSummaryFragment();
 529     }
 530     private void showAccountSummaryFragment() {
 531         mViewPager.setCurrentItem(0, true);
 532         Data.accountFilter.setValue(null);
 533     }
 534     public void onLatestTransactionsClicked(View view) {
 535         drawer.closeDrawers();
 536
 537         showTransactionsFragment((String) null);
 538     }
 539     private void showTransactionsFragment(String accName) {
 540         Data.accountFilter.setValue(accName);
 541         mViewPager.setCurrentItem(1, true);
 542     }
 543     private void showTransactionsFragment(LedgerAccount account) {
 544         showTransactionsFragment((account == null) ? null : account.getName());
 545     }
 546     public void showAccountTransactions(LedgerAccount account) {
 547         mBackMeansToAccountList = true;
 548         showTransactionsFragment(account);
 549     }
 550     @Override
 551     public void onBackPressed() {
 552         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 553         if (drawer.isDrawerOpen(GravityCompat.START)) {
 554             drawer.closeDrawer(GravityCompat.START);
 555         }
 556         else {
 557             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 558                 Data.accountFilter.setValue(null);
 559                 showAccountSummaryFragment();
 560                 mBackMeansToAccountList = false;
 561             }
 562             else {
 563                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 564                         fragmentManager.getBackStackEntryCount()));
 565
 566                 super.onBackPressed();
 567             }
 568         }
 569     }
 570     public void updateLastUpdateTextFromDB() {
 571         final MobileLedgerProfile profile = Data.profile.get();
 572         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 573
 574         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 575         if (last_update == 0) {
 576             Data.lastUpdateDate.postValue(null);
 577         }
 578         else {
 579             Data.lastUpdateDate.postValue(new Date(last_update));
 580         }
 581     }
 582     public void scheduleTransactionListRetrieval() {
 583         if (Data.profile.get() == null) return;
 584
 585         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 586
 587         retrieveTransactionsTask.execute();
 588     }
 589     public void onStopTransactionRefreshClick(View view) {
 590         debug("interactive", "Cancelling transactions refresh");
 591         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 592         bTransactionListCancelDownload.setEnabled(false);
 593     }
 594     public void onRetrieveDone(String error) {
 595         progressLayout.setVisibility(View.GONE);
 596
 597         if (error == null) {
 598             updateLastUpdateTextFromDB();
 599
 600             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 601             TransactionListViewModel.scheduleTransactionListReload();
 602         }
 603         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 604     }
 605     public void onRetrieveStart() {
 606         bTransactionListCancelDownload.setEnabled(true);
 607         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 608         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 609         progressBar.setIndeterminate(true);
 610         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 611         else progressBar.setProgress(0);
 612         progressLayout.setVisibility(View.VISIBLE);
 613     }
 614     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 615         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 616             (progress.getTotal() == 0))
 617         {
 618             progressBar.setIndeterminate(true);
 619         }
 620         else {
 621             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 622                 progressBar.setMin(0);
 623             }
 624             progressBar.setMax(progress.getTotal());
 625             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 626                 progressBar.setProgress(progress.getProgress(), true);
 627             }
 628             else progressBar.setProgress(progress.getProgress());
 629             progressBar.setIndeterminate(false);
 630         }
 631     }
 632     public void fabShouldShow() {
 633         MobileLedgerProfile profile = Data.profile.get();
 634         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 635     }
 636     public void fabHide() {
 637         fab.hide();
 638     }
 639     public void navProfilesHeadClicked(View view) {
 640         if (profileListExpanded) {
 641             collapseProfileList();
 642         }
 643         else {
 644             expandProfileList();
 645         }
 646     }
 647     private void expandProfileList() {
 648         profileListExpanded = true;
 649
 650
 651         profileListContainer.setVisibility(View.VISIBLE);
 652         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 653         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 654         profileListHeadMore.setVisibility(View.VISIBLE);
 655         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 656         findViewById(R.id.nav_profile_list).setMinimumHeight(
 657                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 658                        Data.profiles.size()));
 659     }
 660     private void collapseProfileList() {
 661         boolean wasExpanded = profileListExpanded;
 662         profileListExpanded = false;
 663
 664         if (wasExpanded) {
 665             final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 666             animation.setAnimationListener(new Animation.AnimationListener() {
 667                 @Override
 668                 public void onAnimationStart(Animation animation) {
 669
 670                 }
 671                 @Override
 672                 public void onAnimationEnd(Animation animation) {
 673                     profileListContainer.setVisibility(View.GONE);
 674                 }
 675                 @Override
 676                 public void onAnimationRepeat(Animation animation) {
 677
 678                 }
 679             });
 680             mProfileListAdapter.stopEditingProfiles();
 681
 682             profileListContainer.startAnimation(animation);
 683             profileListHeadArrow.setRotation(0f);
 684             profileListHeadArrow
 685                     .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 686             final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 687             moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 688                 @Override
 689                 public void onAnimationStart(Animation animation) {
 690                 }
 691                 @Override
 692                 public void onAnimationEnd(Animation animation) {
 693                     profileListHeadMore.setVisibility(View.GONE);
 694                 }
 695                 @Override
 696                 public void onAnimationRepeat(Animation animation) {
 697                 }
 698             });
 699             profileListHeadMore.startAnimation(moreAnimation);
 700         }
 701         else {
 702             profileListContainer.setVisibility(View.GONE);
 703             profileListHeadArrow.setRotation(0f);
 704             profileListHeadMore.setVisibility(View.GONE);
 705         }
 706     }
 707     public void onAccountSummaryRowViewClicked(View view) {
 708         ViewGroup row;
 709         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 710         else row = (ViewGroup) view.getParent();
 711
 712         LedgerAccount acc = (LedgerAccount) row.getTag();
 713         switch (view.getId()) {
 714             case R.id.account_row_acc_name:
 715             case R.id.account_expander:
 716             case R.id.account_expander_container:
 717                 debug("accounts", "Account expander clicked");
 718                 if (!acc.hasSubAccounts()) return;
 719
 720                 boolean wasExpanded = acc.isExpanded();
 721
 722                 View arrow = row.findViewById(R.id.account_expander_container);
 723
 724                 arrow.clearAnimation();
 725                 ViewPropertyAnimator animator = arrow.animate();
 726
 727                 acc.toggleExpanded();
 728                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 729                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 730                         });
 731
 732                 if (wasExpanded) {
 733                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 734                     arrow.setRotation(0);
 735                     animator.rotationBy(180);
 736
 737                     // removing all child accounts from the view
 738                     int start = -1, count = 0;
 739                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 740                         for (int i = 0; i < Data.accounts.size(); i++) {
 741                             if (acc.isParentOf(Data.accounts.get(i))) {
 742 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 743 //                                        Data.accounts.get(i).getName(), i));
 744                                 if (start == -1) {
 745                                     start = i;
 746                                 }
 747                                 count++;
 748                             }
 749                             else {
 750                                 if (start != -1) {
 751 //                                    debug("accounts",
 752 //                                            String.format("Found a non-child '%s' at position %d",
 753 //                                                    Data.accounts.get(i).getName(), i));
 754                                     break;
 755                                 }
 756                             }
 757                         }
 758
 759                         if (start != -1) {
 760                             for (int j = 0; j < count; j++) {
 761 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 762 //                                        Data.accounts.get(start).getName()));
 763                                 Data.accounts.removeQuietly(start);
 764                             }
 765
 766                             mAccountSummaryFragment.modelAdapter
 767                                     .notifyItemRangeRemoved(start, count);
 768                         }
 769                     }
 770                 }
 771                 else {
 772                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 773                     arrow.setRotation(180);
 774                     animator.rotationBy(-180);
 775                     List<LedgerAccount> children =
 776                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 777                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 778                         int parentPos = Data.accounts.indexOf(acc);
 779                         if (parentPos != -1) {
 780                             // may have disappeared in a concurrent refresh operation
 781                             Data.accounts.addAllQuietly(parentPos + 1, children);
 782                             mAccountSummaryFragment.modelAdapter
 783                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 784                         }
 785                     }
 786                 }
 787                 break;
 788             case R.id.account_row_acc_amounts:
 789                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 790                     acc.toggleAmountsExpanded();
 791                     DbOpQueue
 792                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 793                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 794                                                  Data.profile.get().getUuid()
 795                                     });
 796                     Data.accounts.triggerItemChangedNotification(acc);
 797                 }
 798                 break;
 799         }
 800     }
 801
 802     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 803
 804         SectionsPagerAdapter(FragmentManager fm) {
 805             super(fm);
 806         }
 807
 808         @NotNull
 809         @Override
 810         public Fragment getItem(int position) {
 811             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 812             switch (position) {
 813                 case 0:
 814 //                    debug("flow", "Creating account summary fragment");
 815                     return mAccountSummaryFragment = new AccountSummaryFragment();
 816                 case 1:
 817                     return new TransactionListFragment();
 818                 default:
 819                     throw new IllegalStateException(
 820                             String.format("Unexpected fragment index: " + "%d", position));
 821             }
 822         }
 823
 824         @Override
 825         public int getCount() {
 826             return 2;
 827         }
 828     }
 829 }