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.res.ColorStateList;
  23 import android.graphics.Color;
  24 import android.os.AsyncTask;
  25 import android.os.Build;
  26 import android.os.Bundle;
  27 import android.util.Log;
  28 import android.view.View;
  29 import android.view.ViewGroup;
  30 import android.view.animation.Animation;
  31 import android.view.animation.AnimationUtils;
  32 import android.widget.LinearLayout;
  33 import android.widget.ProgressBar;
  34 import android.widget.TextView;
  35 import android.widget.Toast;
  36
  37 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  38
  39 import net.ktnx.mobileledger.R;
  40 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  41 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  42 import net.ktnx.mobileledger.model.Data;
  43 import net.ktnx.mobileledger.model.LedgerAccount;
  44 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  45 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  46 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  47 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  48 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  49 import net.ktnx.mobileledger.utils.Colors;
  50 import net.ktnx.mobileledger.utils.MLDB;
  51
  52 import java.lang.ref.WeakReference;
  53 import java.text.DateFormat;
  54 import java.util.Date;
  55 import java.util.Observable;
  56 import java.util.Observer;
  57
  58 import androidx.appcompat.app.ActionBarDrawerToggle;
  59 import androidx.appcompat.widget.Toolbar;
  60 import androidx.core.view.GravityCompat;
  61 import androidx.drawerlayout.widget.DrawerLayout;
  62 import androidx.fragment.app.Fragment;
  63 import androidx.fragment.app.FragmentManager;
  64 import androidx.fragment.app.FragmentPagerAdapter;
  65 import androidx.recyclerview.widget.LinearLayoutManager;
  66 import androidx.recyclerview.widget.RecyclerView;
  67 import androidx.viewpager.widget.ViewPager;
  68
  69 public class MainActivity extends ProfileThemedActivity {
  70     private static final String STATE_CURRENT_PAGE = "current_page";
  71     private static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  72     DrawerLayout drawer;
  73     private LinearLayout profileListContainer;
  74     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  75     private LinearLayout profileListHeadMoreAndCancel;
  76     private FragmentManager fragmentManager;
  77     private TextView tvLastUpdate;
  78     private RetrieveTransactionsTask retrieveTransactionsTask;
  79     private View bTransactionListCancelDownload;
  80     private ProgressBar progressBar;
  81     private LinearLayout progressLayout;
  82     private SectionsPagerAdapter mSectionsPagerAdapter;
  83     private ViewPager mViewPager;
  84     private FloatingActionButton fab;
  85     private boolean profileModificationEnabled = false;
  86     private boolean profileListExpanded = false;
  87     private ProfilesRecyclerViewAdapter mProfileListAdapter;
  88
  89     @Override
  90     protected void onStart() {
  91         super.onStart();
  92
  93         Data.lastUpdateDate.set(null);
  94         updateLastUpdateTextFromDB();
  95         Date lastUpdate = Data.lastUpdateDate.get();
  96
  97         long now = new Date().getTime();
  98         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
  99             if (lastUpdate == null) Log.d("db::", "WEB data never fetched. scheduling a fetch");
 100             else Log.d("db",
 101                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 102                             lastUpdate.getTime() / 1000f, now / 1000f));
 103
 104             scheduleTransactionListRetrieval();
 105         }
 106     }
 107     @Override
 108     protected void onSaveInstanceState(Bundle outState) {
 109         super.onSaveInstanceState(outState);
 110         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 111     }
 112     @Override
 113     protected void onCreate(Bundle savedInstanceState) {
 114         super.onCreate(savedInstanceState);
 115
 116         setContentView(R.layout.activity_main);
 117
 118         fab = findViewById(R.id.btn_add_transaction);
 119         profileListContainer = findViewById(R.id.nav_profile_list_container);
 120         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 121         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 122         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 123         profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
 124         drawer = findViewById(R.id.drawer_layout);
 125         tvLastUpdate = findViewById(R.id.transactions_last_update);
 126         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 127         progressBar = findViewById(R.id.transaction_list_progress_bar);
 128         progressLayout = findViewById(R.id.transaction_progress_layout);
 129         fragmentManager = getSupportFragmentManager();
 130         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 131         mViewPager = findViewById(R.id.root_frame);
 132
 133         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 134         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 135
 136
 137         Toolbar toolbar = findViewById(R.id.toolbar);
 138         setSupportActionBar(toolbar);
 139
 140         Data.profile.addObserver((o, arg) -> {
 141             MobileLedgerProfile profile = Data.profile.get();
 142             runOnUiThread(() -> {
 143                 if (profile == null) setTitle(R.string.app_name);
 144                 else setTitle(profile.getName());
 145                 updateLastUpdateTextFromDB();
 146                 if (profile.isPostingPermitted()) {
 147                     toolbar.setSubtitle(null);
 148                     fab.show();
 149                 }
 150                 else {
 151                     toolbar.setSubtitle(R.string.profile_subitlte_read_only);
 152                     fab.hide();
 153                 }
 154
 155                 int newProfileTheme = profile.getThemeId();
 156                 if (newProfileTheme != Colors.profileThemeId) {
 157                     Log.d("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 158                             newProfileTheme));
 159                     profileThemeChanged();
 160                     Colors.profileThemeId = newProfileTheme;
 161                 }
 162             });
 163         });
 164
 165         ActionBarDrawerToggle toggle =
 166                 new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open,
 167                         R.string.navigation_drawer_close);
 168         drawer.addDrawerListener(toggle);
 169         toggle.syncState();
 170
 171         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 172
 173         try {
 174             PackageInfo pi =
 175                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 176             ver.setText(pi.versionName);
 177         }
 178         catch (Exception e) {
 179             e.printStackTrace();
 180         }
 181
 182         if (progressBar == null)
 183             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 184         if (progressLayout == null) throw new RuntimeException(
 185                 "Can't get hold on the transaction value progress bar layout");
 186
 187         markDrawerItemCurrent(R.id.nav_account_summary);
 188
 189         mViewPager.setAdapter(mSectionsPagerAdapter);
 190         mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
 191             @Override
 192             public void onPageSelected(int position) {
 193                 switch (position) {
 194                     case 0:
 195                         markDrawerItemCurrent(R.id.nav_account_summary);
 196                         break;
 197                     case 1:
 198                         markDrawerItemCurrent(R.id.nav_latest_transactions);
 199                         break;
 200                     default:
 201                         Log.e("MainActivity", String.format("Unexpected page index %d", position));
 202                 }
 203
 204                 super.onPageSelected(position);
 205             }
 206         });
 207
 208         if (savedInstanceState != null) {
 209             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 210             if (currentPage != -1) {
 211                 mViewPager.setCurrentItem(currentPage, false);
 212             }
 213         }
 214
 215         Data.lastUpdateDate.addObserver((o, arg) -> {
 216             Log.d("main", "lastUpdateDate changed");
 217             runOnUiThread(() -> {
 218                 Date date = Data.lastUpdateDate.get();
 219                 if (date == null) {
 220                     tvLastUpdate.setText(R.string.transaction_last_update_never);
 221                 }
 222                 else {
 223                     final String text = DateFormat.getDateTimeInstance().format(date);
 224                     tvLastUpdate.setText(text);
 225                     Log.d("despair", String.format("Date formatted: %s", text));
 226                 }
 227             });
 228         });
 229
 230         findViewById(R.id.btn_no_profiles_add)
 231                 .setOnClickListener(v -> startEditProfileActivity(null));
 232
 233         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 234
 235         findViewById(R.id.nav_new_profile_button)
 236                 .setOnClickListener(v -> startEditProfileActivity(null));
 237
 238         RecyclerView root = findViewById(R.id.nav_profile_list);
 239         if (root == null)
 240             throw new RuntimeException("Can't get hold on the transaction value view");
 241
 242         mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 243         root.setAdapter(mProfileListAdapter);
 244
 245         mProfileListAdapter.addEditingProfilesObserver(new Observer() {
 246             @Override
 247             public void update(Observable o, Object arg) {
 248                 if (mProfileListAdapter.isEditingProfiles()) {
 249                     profileListHeadArrow.clearAnimation();
 250                     profileListHeadArrow.setVisibility(View.GONE);
 251                     profileListHeadMore.setVisibility(View.GONE);
 252                     profileListHeadCancel.setVisibility(View.VISIBLE);
 253                 }
 254                 else {
 255                     profileListHeadArrow.setRotation(180f);
 256                     profileListHeadArrow.setVisibility(View.VISIBLE);
 257                     profileListHeadCancel.setVisibility(View.GONE);
 258                     profileListHeadMore.setVisibility(View.GONE);
 259                     profileListHeadMore
 260                             .setVisibility(profileListExpanded ? View.VISIBLE : View.GONE);
 261                 }
 262             }
 263         });
 264
 265         LinearLayoutManager llm = new LinearLayoutManager(this);
 266
 267         llm.setOrientation(RecyclerView.VERTICAL);
 268         root.setLayoutManager(llm);
 269
 270         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 271         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 272         profileListHeadMoreAndCancel
 273                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 274
 275         drawer.addDrawerListener(new DrawerLayout.SimpleDrawerListener() {
 276             @Override
 277             public void onDrawerClosed(View drawerView) {
 278                 super.onDrawerClosed(drawerView);
 279                 collapseProfileList();
 280             }
 281         });
 282     }
 283     private void profileThemeChanged() {
 284         setupProfileColors();
 285
 286         Bundle bundle = new Bundle();
 287         onSaveInstanceState(bundle);
 288         // restart activity to reflect theme change
 289         finish();
 290         Intent intent = new Intent(this, this.getClass());
 291         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 292         startActivity(intent);
 293     }
 294     @Override
 295     protected void onResume() {
 296         super.onResume();
 297         setupProfile();
 298     }
 299     public void startEditProfileActivity(MobileLedgerProfile profile) {
 300         Intent intent = new Intent(this, ProfileDetailActivity.class);
 301         Bundle args = new Bundle();
 302         if (profile != null) {
 303             int index = Data.getProfileIndex(profile);
 304             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 305         }
 306         intent.putExtras(args);
 307         startActivity(intent, args);
 308     }
 309     private void setupProfile() {
 310         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 311         MobileLedgerProfile profile;
 312
 313         profile = MobileLedgerProfile.loadAllFromDB(profileUUID);
 314
 315         if (Data.profiles.getList().isEmpty()) {
 316             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 317             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 318             return;
 319         }
 320
 321         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 322         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 323
 324         if (profile == null) profile = Data.profiles.get(0);
 325
 326         if (profile == null) throw new AssertionError("profile must have a value");
 327
 328         Data.setCurrentProfile(profile);
 329     }
 330     public void fabNewTransactionClicked(View view) {
 331         Intent intent = new Intent(this, NewTransactionActivity.class);
 332         startActivity(intent);
 333         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 334     }
 335     public void navSettingsClicked(View view) {
 336         Intent intent = new Intent(this, SettingsActivity.class);
 337         startActivity(intent);
 338         drawer.closeDrawers();
 339     }
 340     public void markDrawerItemCurrent(int id) {
 341         TextView item = drawer.findViewById(id);
 342         item.setBackgroundColor(Colors.tableRowDarkBG);
 343
 344         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 345         for (int i = 0; i < actions.getChildCount(); i++) {
 346             View view = actions.getChildAt(i);
 347             if (view.getId() != id) {
 348                 view.setBackgroundColor(Color.TRANSPARENT);
 349             }
 350         }
 351     }
 352     public void onAccountSummaryClicked(View view) {
 353         drawer.closeDrawers();
 354
 355         showAccountSummaryFragment();
 356     }
 357     private void showAccountSummaryFragment() {
 358         mViewPager.setCurrentItem(0, true);
 359         TransactionListFragment.accountFilter.set(null);
 360 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 361 //        accountSummaryFragment = new AccountSummaryFragment();
 362 //        ft.replace(R.id.root_frame, accountSummaryFragment);
 363 //        ft.commit();
 364 //        currentFragment = accountSummaryFragment;
 365     }
 366     public void onLatestTransactionsClicked(View view) {
 367         drawer.closeDrawers();
 368
 369         showTransactionsFragment(null);
 370     }
 371     private void resetFragmentBackStack() {
 372 //        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
 373     }
 374     private void showTransactionsFragment(LedgerAccount account) {
 375         if (account != null) TransactionListFragment.accountFilter.set(account.getName());
 376         mViewPager.setCurrentItem(1, true);
 377 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 378 //        if (transactionListFragment == null) {
 379 //            Log.d("flow", "MainActivity creating TransactionListFragment");
 380 //            transactionListFragment = new TransactionListFragment();
 381 //        }
 382 //        Bundle bundle = new Bundle();
 383 //        if (account != null) {
 384 //            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
 385 //                    account.getName());
 386 //        }
 387 //        transactionListFragment.setArguments(bundle);
 388 //        ft.replace(R.id.root_frame, transactionListFragment);
 389 //        if (account != null)
 390 //            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
 391 //        ft.commit();
 392 //
 393 //        currentFragment = transactionListFragment;
 394     }
 395     public void showAccountTransactions(LedgerAccount account) {
 396         showTransactionsFragment(account);
 397     }
 398     @Override
 399     public void onBackPressed() {
 400         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 401         if (drawer.isDrawerOpen(GravityCompat.START)) {
 402             drawer.closeDrawer(GravityCompat.START);
 403         }
 404         else {
 405             Log.d("fragments",
 406                     String.format("manager stack: %d", fragmentManager.getBackStackEntryCount()));
 407
 408             super.onBackPressed();
 409         }
 410     }
 411     public void updateLastUpdateTextFromDB() {
 412         {
 413             final MobileLedgerProfile profile = Data.profile.get();
 414             long last_update =
 415                     (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 416
 417             Log.d("transactions", String.format("Last update = %d", last_update));
 418             if (last_update == 0) {
 419                 Data.lastUpdateDate.set(null);
 420             }
 421             else {
 422                 Data.lastUpdateDate.set(new Date(last_update));
 423             }
 424         }
 425     }
 426     public void scheduleTransactionListRetrieval() {
 427         if (Data.profile.get() == null) return;
 428
 429         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 430
 431         retrieveTransactionsTask.execute();
 432     }
 433     public void onStopTransactionRefreshClick(View view) {
 434         Log.d("interactive", "Cancelling transactions refresh");
 435         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 436         bTransactionListCancelDownload.setEnabled(false);
 437     }
 438     public void onRetrieveDone(String error) {
 439         progressLayout.setVisibility(View.GONE);
 440
 441         if (error == null) {
 442             updateLastUpdateTextFromDB();
 443
 444             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 445         }
 446         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 447     }
 448     public void onRetrieveStart() {
 449         bTransactionListCancelDownload.setEnabled(true);
 450         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 451         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 452         progressBar.setIndeterminate(true);
 453         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 454         else progressBar.setProgress(0);
 455         progressLayout.setVisibility(View.VISIBLE);
 456     }
 457     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 458         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 459             (progress.getTotal() == 0))
 460         {
 461             progressBar.setIndeterminate(true);
 462         }
 463         else {
 464             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 465                 progressBar.setMin(0);
 466             }
 467             progressBar.setMax(progress.getTotal());
 468             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 469                 progressBar.setProgress(progress.getProgress(), true);
 470             }
 471             else progressBar.setProgress(progress.getProgress());
 472             progressBar.setIndeterminate(false);
 473         }
 474     }
 475     public void fabShouldShow() {
 476         MobileLedgerProfile profile = Data.profile.get();
 477         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 478     }
 479     public void navProfilesHeadClicked(View view) {
 480         if (profileListExpanded) {
 481             collapseProfileList();
 482         }
 483         else {
 484             expandProfileList();
 485         }
 486     }
 487     private void expandProfileList() {
 488         profileListExpanded = true;
 489
 490
 491         profileListContainer.setVisibility(View.VISIBLE);
 492         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 493         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 494         profileListHeadMore.setVisibility(View.VISIBLE);
 495         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 496     }
 497     private void collapseProfileList() {
 498         profileListExpanded = false;
 499
 500         final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 501         animation.setAnimationListener(new Animation.AnimationListener() {
 502             @Override
 503             public void onAnimationStart(Animation animation) {
 504
 505             }
 506             @Override
 507             public void onAnimationEnd(Animation animation) {
 508                 profileListContainer.setVisibility(View.GONE);
 509             }
 510             @Override
 511             public void onAnimationRepeat(Animation animation) {
 512
 513             }
 514         });
 515         mProfileListAdapter.stopEditingProfiles();
 516
 517         profileListContainer.startAnimation(animation);
 518         profileListHeadArrow.setRotation(0f);
 519         profileListHeadArrow
 520                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 521         profileListHeadMore.setVisibility(View.GONE);
 522     }
 523     public void onProfileRowClicked(View v) {
 524         Data.setCurrentProfile((MobileLedgerProfile) v.getTag());
 525     }
 526     public void enableProfileModifications() {
 527         profileModificationEnabled = true;
 528         ViewGroup profileList = findViewById(R.id.nav_profile_list);
 529         for (int i = 0; i < profileList.getChildCount(); i++) {
 530             View aRow = profileList.getChildAt(i);
 531             aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.VISIBLE);
 532             aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.VISIBLE);
 533         }
 534         // FIXME enable rearranging
 535
 536     }
 537     public void disableProfileModifications() {
 538         profileModificationEnabled = false;
 539         ViewGroup profileList = findViewById(R.id.nav_profile_list);
 540         for (int i = 0; i < profileList.getChildCount(); i++) {
 541             View aRow = profileList.getChildAt(i);
 542             aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.GONE);
 543             aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.INVISIBLE);
 544         }
 545         // FIXME disable rearranging
 546
 547     }
 548
 549     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 550
 551         public SectionsPagerAdapter(FragmentManager fm) {
 552             super(fm);
 553         }
 554
 555         @Override
 556         public Fragment getItem(int position) {
 557             Log.d("main", String.format("Switching to fragment %d", position));
 558             switch (position) {
 559                 case 0:
 560                     return new AccountSummaryFragment();
 561                 case 1:
 562                     return new TransactionListFragment();
 563                 default:
 564                     throw new IllegalStateException(
 565                             String.format("Unexpected fragment index: " + "%d", position));
 566             }
 567         }
 568
 569         @Override
 570         public int getCount() {
 571             return 2;
 572         }
 573     }
 574
 575 }