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.MLDB;
  60
  61 import org.jetbrains.annotations.NotNull;
  62
  63 import java.lang.ref.WeakReference;
  64 import java.text.DateFormat;
  65 import java.util.ArrayList;
  66 import java.util.Date;
  67 import java.util.List;
  68 import java.util.Observer;
  69
  70 import androidx.appcompat.app.ActionBarDrawerToggle;
  71 import androidx.appcompat.widget.Toolbar;
  72 import androidx.core.view.GravityCompat;
  73 import androidx.drawerlayout.widget.DrawerLayout;
  74 import androidx.fragment.app.Fragment;
  75 import androidx.fragment.app.FragmentManager;
  76 import androidx.fragment.app.FragmentPagerAdapter;
  77 import androidx.recyclerview.widget.LinearLayoutManager;
  78 import androidx.recyclerview.widget.RecyclerView;
  79 import androidx.viewpager.widget.ViewPager;
  80
  81 import static net.ktnx.mobileledger.utils.Logger.debug;
  82
  83 public class MainActivity extends ProfileThemedActivity {
  84     public static final String STATE_CURRENT_PAGE = "current_page";
  85     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  86     public static final String STATE_ACC_FILTER = "account_filter";
  87     public AccountSummaryFragment mAccountSummaryFragment;
  88     DrawerLayout drawer;
  89     private LinearLayout profileListContainer;
  90     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  91     private LinearLayout profileListHeadMoreAndCancel;
  92     private FragmentManager fragmentManager;
  93     private TextView tvLastUpdate;
  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 profileModificationEnabled = false;
 102     private boolean profileListExpanded = false;
 103     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 104     private int mCurrentPage;
 105     private String mAccountFilter;
 106     private boolean mBackMeansToAccountList = false;
 107     private Observer profileObserver;
 108     private Observer profilesObserver;
 109     private Toolbar mToolbar;
 110     private DrawerLayout.SimpleDrawerListener drawerListener;
 111     private ActionBarDrawerToggle barDrawerToggle;
 112     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 113     private Observer editingProfilesObserver;
 114     @Override
 115     protected void onStart() {
 116         super.onStart();
 117
 118         debug("flow", "MainActivity.onStart()");
 119         mViewPager.setCurrentItem(mCurrentPage, false);
 120         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 121         else Data.accountFilter.setValue(null);
 122
 123     }
 124     @Override
 125     protected void onSaveInstanceState(Bundle outState) {
 126         super.onSaveInstanceState(outState);
 127         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 128         if (mAccountFilter != null) outState.putString(STATE_ACC_FILTER, mAccountFilter);
 129     }
 130     @Override
 131     protected void onDestroy() {
 132         mSectionsPagerAdapter = null;
 133         Data.profile.deleteObserver(profileObserver);
 134         profileObserver = null;
 135         Data.profiles.deleteObserver(profilesObserver);
 136         profilesObserver = null;
 137         RecyclerView root = findViewById(R.id.nav_profile_list);
 138         if (root != null) root.setAdapter(null);
 139         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 140         drawerListener = null;
 141         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 142         barDrawerToggle = null;
 143         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 144         pageChangeListener = null;
 145         if (mProfileListAdapter != null)
 146             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 147         editingProfilesObserver = null;
 148         super.onDestroy();
 149     }
 150     @Override
 151     protected void onCreate(Bundle savedInstanceState) {
 152         super.onCreate(savedInstanceState);
 153         debug("flow", "MainActivity.onCreate()");
 154         int profileColor = Data.retrieveCurrentThemeIdFromDb();
 155         Colors.setupTheme(this, profileColor);
 156         Colors.profileThemeId = profileColor;
 157         setContentView(R.layout.activity_main);
 158
 159         fab = findViewById(R.id.btn_add_transaction);
 160         profileListContainer = findViewById(R.id.nav_profile_list_container);
 161         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 162         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 163         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 164         profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
 165         drawer = findViewById(R.id.drawer_layout);
 166         tvLastUpdate = findViewById(R.id.transactions_last_update);
 167         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 168         progressBar = findViewById(R.id.transaction_list_progress_bar);
 169         progressLayout = findViewById(R.id.transaction_progress_layout);
 170         fragmentManager = getSupportFragmentManager();
 171         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 172         mViewPager = findViewById(R.id.root_frame);
 173
 174         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 175         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 176
 177
 178         mToolbar = findViewById(R.id.toolbar);
 179         setSupportActionBar(mToolbar);
 180
 181         if (profileObserver == null) {
 182             profileObserver = (o, arg) -> onProfileChanged(arg);
 183             Data.profile.addObserver(profileObserver);
 184         }
 185
 186         if (profilesObserver == null) {
 187             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 188             Data.profiles.addObserver(profilesObserver);
 189         }
 190
 191         if (barDrawerToggle == null) {
 192             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 193                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 194             drawer.addDrawerListener(barDrawerToggle);
 195         }
 196         barDrawerToggle.syncState();
 197
 198         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 199
 200         try {
 201             PackageInfo pi =
 202                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 203             ver.setText(pi.versionName);
 204         }
 205         catch (Exception e) {
 206             e.printStackTrace();
 207         }
 208
 209         if (progressBar == null)
 210             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 211         if (progressLayout == null) throw new RuntimeException(
 212                 "Can't get hold on the transaction value progress bar layout");
 213
 214         markDrawerItemCurrent(R.id.nav_account_summary);
 215
 216         mViewPager.setAdapter(mSectionsPagerAdapter);
 217
 218         if (pageChangeListener == null) {
 219             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 220                 @Override
 221                 public void onPageSelected(int position) {
 222                     switch (position) {
 223                         case 0:
 224                             markDrawerItemCurrent(R.id.nav_account_summary);
 225                             break;
 226                         case 1:
 227                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 228                             break;
 229                         default:
 230                             Log.e("MainActivity",
 231                                     String.format("Unexpected page index %d", position));
 232                     }
 233
 234                     super.onPageSelected(position);
 235                 }
 236             };
 237             mViewPager.addOnPageChangeListener(pageChangeListener);
 238         }
 239
 240         mCurrentPage = 0;
 241         if (savedInstanceState != null) {
 242             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 243             if (currentPage != -1) {
 244                 mCurrentPage = currentPage;
 245             }
 246             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 247         }
 248         else mAccountFilter = null;
 249
 250         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 251
 252         findViewById(R.id.btn_no_profiles_add)
 253                 .setOnClickListener(v -> startEditProfileActivity(null));
 254
 255         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 256
 257         findViewById(R.id.nav_new_profile_button)
 258                 .setOnClickListener(v -> startEditProfileActivity(null));
 259
 260         RecyclerView root = findViewById(R.id.nav_profile_list);
 261         if (root == null)
 262             throw new RuntimeException("Can't get hold on the transaction value view");
 263
 264         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 265         root.setAdapter(mProfileListAdapter);
 266
 267         if (editingProfilesObserver == null) {
 268             editingProfilesObserver = (o, arg) -> {
 269                 if (mProfileListAdapter.isEditingProfiles()) {
 270                     profileListHeadArrow.clearAnimation();
 271                     profileListHeadArrow.setVisibility(View.GONE);
 272                     profileListHeadMore.setVisibility(View.GONE);
 273                     profileListHeadMore
 274                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 275                     profileListHeadCancel.setVisibility(View.VISIBLE);
 276                     profileListHeadCancel
 277                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 278                 }
 279                 else {
 280                     profileListHeadArrow.setRotation(180f);
 281                     profileListHeadArrow.setVisibility(View.VISIBLE);
 282                     profileListHeadCancel.setVisibility(View.GONE);
 283                     profileListHeadCancel
 284                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 285                     profileListHeadMore.setVisibility(View.GONE);
 286                     if (profileListExpanded) {
 287                         profileListHeadMore.setVisibility(View.VISIBLE);
 288                         profileListHeadMore
 289                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 290                     }
 291                     else profileListHeadMore.setVisibility(View.GONE);
 292                 }
 293             };
 294             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 295         }
 296
 297         LinearLayoutManager llm = new LinearLayoutManager(this);
 298
 299         llm.setOrientation(RecyclerView.VERTICAL);
 300         root.setLayoutManager(llm);
 301
 302         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 303         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 304         profileListHeadMoreAndCancel
 305                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 306
 307         if (drawerListener == null) {
 308             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 309                 @Override
 310                 public void onDrawerClosed(View drawerView) {
 311                     super.onDrawerClosed(drawerView);
 312                     collapseProfileList();
 313                 }
 314             };
 315             drawer.addDrawerListener(drawerListener);
 316         }
 317
 318         findViewById(R.id.nav_profile_list_head_layout)
 319                 .setOnClickListener(this::navProfilesHeadClicked);
 320         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 321         boolean initialStart = Data.profile.get() == null;
 322         setupProfile();
 323         if (!initialStart) onProfileChanged(null);
 324
 325         updateLastUpdateTextFromDB();
 326     }
 327     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 328         long now = new Date().getTime();
 329         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 330             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 331             else debug("db",
 332                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 333                             lastUpdate.getTime() / 1000f, now / 1000f));
 334
 335             scheduleTransactionListRetrieval();
 336         }
 337     }
 338     private void createShortcuts() {
 339         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return;
 340
 341         List<ShortcutInfo> shortcuts = new ArrayList<>();
 342         try (LockHolder lh = Data.profiles.lockForReading()) {
 343             for (int i = 0; i < Data.profiles.size(); i++) {
 344                 MobileLedgerProfile p = Data.profiles.get(i);
 345                 if (!p.isPostingPermitted()) continue;
 346
 347                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 348                         .setShortLabel(p.getName())
 349                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 350                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 351                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 352                         .setRank(i).build();
 353                 shortcuts.add(si);
 354             }
 355         }
 356         ShortcutManager sm = getSystemService(ShortcutManager.class);
 357         sm.setDynamicShortcuts(shortcuts);
 358     }
 359     private void onProfileListChanged(Object arg) {
 360         findViewById(R.id.nav_profile_list).setMinimumHeight(
 361                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 362                        Data.profiles.size()));
 363
 364         debug("profiles", "profile list changed");
 365         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 366         else mProfileListAdapter.notifyItemChanged((int) arg);
 367
 368         createShortcuts();
 369     }
 370     private void onProfileChanged(Object arg) {
 371         MobileLedgerProfile profile = Data.profile.get();
 372         MainActivity.this.runOnUiThread(() -> {
 373
 374             boolean haveProfile = profile != null;
 375             findViewById(R.id.no_profiles_layout)
 376                     .setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 377             findViewById(R.id.pager_layout)
 378                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 379
 380             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 381             else MainActivity.this.setTitle(profile.getName());
 382             MainActivity.this.updateLastUpdateTextFromDB();
 383             int old_index = -1;
 384             int new_index = -1;
 385             if (arg != null) {
 386                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 387                 old_index = Data.getProfileIndex(old);
 388                 new_index = Data.getProfileIndex(profile);
 389             }
 390
 391             if ((old_index != -1) && (new_index != -1)) {
 392                 mProfileListAdapter.notifyItemChanged(old_index);
 393                 mProfileListAdapter.notifyItemChanged(new_index);
 394             }
 395             else mProfileListAdapter.notifyDataSetChanged();
 396
 397             MainActivity.this.collapseProfileList();
 398
 399             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 400             if (newProfileTheme != Colors.profileThemeId) {
 401                 debug("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 402                         newProfileTheme));
 403                 MainActivity.this.profileThemeChanged();
 404                 Colors.profileThemeId = newProfileTheme;
 405                 // profileThemeChanged would restart the activity, so no need to reload the
 406                 // data sets below
 407                 return;
 408             }
 409             drawer.closeDrawers();
 410
 411             Data.transactions.clear();
 412             debug("transactions", "requesting list reload");
 413             TransactionListViewModel.scheduleTransactionListReload();
 414
 415             Data.accounts.clear();
 416             AccountSummaryViewModel.scheduleAccountListReload();
 417
 418             if (profile == null) {
 419                 mToolbar.setSubtitle(null);
 420                 fab.hide();
 421             }
 422             else {
 423                 if (profile.isPostingPermitted()) {
 424                     mToolbar.setSubtitle(null);
 425                     fab.show();
 426                 }
 427                 else {
 428                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 429                     fab.hide();
 430                 }
 431             }
 432
 433             updateLastUpdateTextFromDB();
 434         });
 435     }
 436     private void updateLastUpdateDisplay(Date newValue) {
 437         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 438         TextView v = findViewById(R.id.transactions_last_update);
 439         if (newValue == null) {
 440             l.setVisibility(View.INVISIBLE);
 441             debug("main", "no last update date :(");
 442         }
 443         else {
 444             final String text = DateFormat.getDateTimeInstance().format(newValue);
 445             v.setText(text);
 446             l.setVisibility(View.VISIBLE);
 447             debug("main", String.format("Date formatted: %s", text));
 448         }
 449
 450         scheduleDataRetrievalIfStale(newValue);
 451     }
 452     @Override
 453     public void finish() {
 454         if (profilesObserver != null) {
 455             Data.profiles.deleteObserver(profilesObserver);
 456             profilesObserver = null;
 457         }
 458
 459         if (profileObserver != null) {
 460             Data.profile.deleteObserver(profileObserver);
 461             profileObserver = null;
 462         }
 463
 464         super.finish();
 465     }
 466     private void profileThemeChanged() {
 467         setupProfileColors();
 468
 469         Bundle bundle = new Bundle();
 470         onSaveInstanceState(bundle);
 471         // restart activity to reflect theme change
 472         finish();
 473         Intent intent = new Intent(this, this.getClass());
 474         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 475         startActivity(intent);
 476     }
 477     public void startEditProfileActivity(MobileLedgerProfile profile) {
 478         Intent intent = new Intent(this, ProfileDetailActivity.class);
 479         Bundle args = new Bundle();
 480         if (profile != null) {
 481             int index = Data.getProfileIndex(profile);
 482             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 483         }
 484         intent.putExtras(args);
 485         startActivity(intent, args);
 486     }
 487     private void setupProfile() {
 488         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 489         MobileLedgerProfile profile;
 490
 491         profile = Data.getProfile(profileUUID);
 492
 493         if (Data.profiles.isEmpty()) {
 494             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 495             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 496             return;
 497         }
 498
 499         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 500         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 501
 502         if (profile == null) profile = Data.profiles.get(0);
 503
 504         if (profile == null) throw new AssertionError("profile must have a value");
 505
 506         Data.setCurrentProfile(profile);
 507     }
 508     public void fabNewTransactionClicked(View view) {
 509         Intent intent = new Intent(this, NewTransactionActivity.class);
 510         startActivity(intent);
 511         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 512     }
 513     public void navSettingsClicked(View view) {
 514         Intent intent = new Intent(this, SettingsActivity.class);
 515         startActivity(intent);
 516         drawer.closeDrawers();
 517     }
 518     public void markDrawerItemCurrent(int id) {
 519         TextView item = drawer.findViewById(id);
 520         item.setBackgroundColor(Colors.tableRowDarkBG);
 521
 522         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 523         for (int i = 0; i < actions.getChildCount(); i++) {
 524             View view = actions.getChildAt(i);
 525             if (view.getId() != id) {
 526                 view.setBackgroundColor(Color.TRANSPARENT);
 527             }
 528         }
 529     }
 530     public void onAccountSummaryClicked(View view) {
 531         drawer.closeDrawers();
 532
 533         showAccountSummaryFragment();
 534     }
 535     private void showAccountSummaryFragment() {
 536         mViewPager.setCurrentItem(0, true);
 537         Data.accountFilter.setValue(null);
 538 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 539 //        accountSummaryFragment = new AccountSummaryFragment();
 540 //        ft.replace(R.id.root_frame, accountSummaryFragment);
 541 //        ft.commit();
 542 //        currentFragment = accountSummaryFragment;
 543     }
 544     public void onLatestTransactionsClicked(View view) {
 545         drawer.closeDrawers();
 546
 547         showTransactionsFragment((String) null);
 548     }
 549     private void resetFragmentBackStack() {
 550 //        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
 551     }
 552     private void showTransactionsFragment(String accName) {
 553         Data.accountFilter.setValue(accName);
 554         mViewPager.setCurrentItem(1, true);
 555     }
 556     private void showTransactionsFragment(LedgerAccount account) {
 557         showTransactionsFragment((account == null) ? (String) null : account.getName());
 558 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 559 //        if (transactionListFragment == null) {
 560 //            debug("flow", "MainActivity creating TransactionListFragment");
 561 //            transactionListFragment = new TransactionListFragment();
 562 //        }
 563 //        Bundle bundle = new Bundle();
 564 //        if (account != null) {
 565 //            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
 566 //                    account.getName());
 567 //        }
 568 //        transactionListFragment.setArguments(bundle);
 569 //        ft.replace(R.id.root_frame, transactionListFragment);
 570 //        if (account != null)
 571 //            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
 572 //        ft.commit();
 573 //
 574 //        currentFragment = transactionListFragment;
 575     }
 576     public void showAccountTransactions(LedgerAccount account) {
 577         mBackMeansToAccountList = true;
 578         showTransactionsFragment(account);
 579     }
 580     @Override
 581     public void onBackPressed() {
 582         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 583         if (drawer.isDrawerOpen(GravityCompat.START)) {
 584             drawer.closeDrawer(GravityCompat.START);
 585         }
 586         else {
 587             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 588                 Data.accountFilter.setValue(null);
 589                 showAccountSummaryFragment();
 590                 mBackMeansToAccountList = false;
 591             }
 592             else {
 593                 debug("fragments", String.format("manager stack: %d",
 594                         fragmentManager.getBackStackEntryCount()));
 595
 596                 super.onBackPressed();
 597             }
 598         }
 599     }
 600     public void updateLastUpdateTextFromDB() {
 601         final MobileLedgerProfile profile = Data.profile.get();
 602         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 603
 604         debug("transactions", String.format("Last update = %d", last_update));
 605         if (last_update == 0) {
 606             Data.lastUpdateDate.postValue(null);
 607         }
 608         else {
 609             Data.lastUpdateDate.postValue(new Date(last_update));
 610         }
 611     }
 612     public void scheduleTransactionListRetrieval() {
 613         if (Data.profile.get() == null) return;
 614
 615         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 616
 617         retrieveTransactionsTask.execute();
 618     }
 619     public void onStopTransactionRefreshClick(View view) {
 620         debug("interactive", "Cancelling transactions refresh");
 621         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 622         bTransactionListCancelDownload.setEnabled(false);
 623     }
 624     public void onRetrieveDone(String error) {
 625         progressLayout.setVisibility(View.GONE);
 626
 627         if (error == null) {
 628             updateLastUpdateTextFromDB();
 629
 630             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 631             TransactionListViewModel.scheduleTransactionListReload();
 632         }
 633         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 634     }
 635     public void onRetrieveStart() {
 636         bTransactionListCancelDownload.setEnabled(true);
 637         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 638         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 639         progressBar.setIndeterminate(true);
 640         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 641         else progressBar.setProgress(0);
 642         progressLayout.setVisibility(View.VISIBLE);
 643     }
 644     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 645         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 646             (progress.getTotal() == 0))
 647         {
 648             progressBar.setIndeterminate(true);
 649         }
 650         else {
 651             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 652                 progressBar.setMin(0);
 653             }
 654             progressBar.setMax(progress.getTotal());
 655             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 656                 progressBar.setProgress(progress.getProgress(), true);
 657             }
 658             else progressBar.setProgress(progress.getProgress());
 659             progressBar.setIndeterminate(false);
 660         }
 661     }
 662     public void fabShouldShow() {
 663         MobileLedgerProfile profile = Data.profile.get();
 664         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 665     }
 666     public void navProfilesHeadClicked(View view) {
 667         if (profileListExpanded) {
 668             collapseProfileList();
 669         }
 670         else {
 671             expandProfileList();
 672         }
 673     }
 674     private void expandProfileList() {
 675         profileListExpanded = true;
 676
 677
 678         profileListContainer.setVisibility(View.VISIBLE);
 679         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 680         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 681         profileListHeadMore.setVisibility(View.VISIBLE);
 682         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 683         findViewById(R.id.nav_profile_list).setMinimumHeight(
 684                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 685                        Data.profiles.size()));
 686     }
 687     private void collapseProfileList() {
 688         boolean wasExpanded = profileListExpanded;
 689         profileListExpanded = false;
 690
 691         if (wasExpanded) {
 692             final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 693             animation.setAnimationListener(new Animation.AnimationListener() {
 694                 @Override
 695                 public void onAnimationStart(Animation animation) {
 696
 697                 }
 698                 @Override
 699                 public void onAnimationEnd(Animation animation) {
 700                     profileListContainer.setVisibility(View.GONE);
 701                 }
 702                 @Override
 703                 public void onAnimationRepeat(Animation animation) {
 704
 705                 }
 706             });
 707             mProfileListAdapter.stopEditingProfiles();
 708
 709             profileListContainer.startAnimation(animation);
 710             profileListHeadArrow.setRotation(0f);
 711             profileListHeadArrow
 712                     .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 713             final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 714             moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 715                 @Override
 716                 public void onAnimationStart(Animation animation) {
 717                 }
 718                 @Override
 719                 public void onAnimationEnd(Animation animation) {
 720                     profileListHeadMore.setVisibility(View.GONE);
 721                 }
 722                 @Override
 723                 public void onAnimationRepeat(Animation animation) {
 724                 }
 725             });
 726             profileListHeadMore.startAnimation(moreAnimation);
 727         }
 728         else {
 729             profileListContainer.setVisibility(View.GONE);
 730             profileListHeadArrow.setRotation(0f);
 731             profileListHeadMore.setVisibility(View.GONE);
 732         }
 733     }
 734     public void onAccountSummaryRowViewClicked(View view) {
 735         ViewGroup row;
 736         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 737         else row = (ViewGroup) view.getParent();
 738
 739         LedgerAccount acc = (LedgerAccount) row.getTag();
 740         switch (view.getId()) {
 741             case R.id.account_row_acc_name:
 742             case R.id.account_expander:
 743             case R.id.account_expander_container:
 744                 debug("accounts", "Account expander clicked");
 745                 if (!acc.hasSubAccounts()) return;
 746
 747                 boolean wasExpanded = acc.isExpanded();
 748
 749                 View arrow = row.findViewById(R.id.account_expander_container);
 750
 751                 arrow.clearAnimation();
 752                 ViewPropertyAnimator animator = arrow.animate();
 753
 754                 acc.toggleExpanded();
 755                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 756                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 757                         });
 758
 759                 if (wasExpanded) {
 760                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 761                     arrow.setRotation(0);
 762                     animator.rotationBy(180);
 763
 764                     // removing all child accounts from the view
 765                     int start = -1, count = 0;
 766                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 767                         for (int i = 0; i < Data.accounts.size(); i++) {
 768                             if (acc.isParentOf(Data.accounts.get(i))) {
 769 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 770 //                                        Data.accounts.get(i).getName(), i));
 771                                 if (start == -1) {
 772                                     start = i;
 773                                 }
 774                                 count++;
 775                             }
 776                             else {
 777                                 if (start != -1) {
 778 //                                    debug("accounts",
 779 //                                            String.format("Found a non-child '%s' at position %d",
 780 //                                                    Data.accounts.get(i).getName(), i));
 781                                     break;
 782                                 }
 783                             }
 784                         }
 785
 786                         if (start != -1) {
 787                             for (int j = 0; j < count; j++) {
 788 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 789 //                                        Data.accounts.get(start).getName()));
 790                                 Data.accounts.removeQuietly(start);
 791                             }
 792
 793                             mAccountSummaryFragment.modelAdapter
 794                                     .notifyItemRangeRemoved(start, count);
 795                         }
 796                     }
 797                 }
 798                 else {
 799                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 800                     arrow.setRotation(180);
 801                     animator.rotationBy(-180);
 802                     List<LedgerAccount> children =
 803                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 804                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 805                         int parentPos = Data.accounts.indexOf(acc);
 806                         if (parentPos != -1) {
 807                             // may have disappeared in a concurrent refresh operation
 808                             Data.accounts.addAllQuietly(parentPos + 1, children);
 809                             mAccountSummaryFragment.modelAdapter
 810                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 811                         }
 812                     }
 813                 }
 814                 break;
 815             case R.id.account_row_acc_amounts:
 816                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 817                     acc.toggleAmountsExpanded();
 818                     DbOpQueue
 819                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 820                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 821                                                  Data.profile.get().getUuid()
 822                                     });
 823                     Data.accounts.triggerItemChangedNotification(acc);
 824                 }
 825                 break;
 826         }
 827     }
 828
 829     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 830
 831         public SectionsPagerAdapter(FragmentManager fm) {
 832             super(fm);
 833         }
 834
 835         @NotNull
 836         @Override
 837         public Fragment getItem(int position) {
 838             debug("main", String.format("Switching to fragment %d", position));
 839             switch (position) {
 840                 case 0:
 841 //                    debug("flow", "Creating account summary fragment");
 842                     return mAccountSummaryFragment = new AccountSummaryFragment();
 843                 case 1:
 844                     return new TransactionListFragment();
 845                 default:
 846                     throw new IllegalStateException(
 847                             String.format("Unexpected fragment index: " + "%d", position));
 848             }
 849         }
 850
 851         @Override
 852         public int getCount() {
 853             return 2;
 854         }
 855     }
 856 }