app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionFragment.java

   1 /*
   2  * Copyright © 2021 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.new_transaction;
  19
  20 import android.content.Context;
  21 import android.content.Intent;
  22 import android.content.res.Resources;
  23 import android.database.AbstractCursor;
  24 import android.os.Bundle;
  25 import android.os.ParcelFormatException;
  26 import android.renderscript.RSInvalidStateException;
  27 import android.view.LayoutInflater;
  28 import android.view.Menu;
  29 import android.view.MenuInflater;
  30 import android.view.MenuItem;
  31 import android.view.View;
  32 import android.view.ViewGroup;
  33 import android.widget.ProgressBar;
  34
  35 import androidx.annotation.NonNull;
  36 import androidx.annotation.Nullable;
  37 import androidx.appcompat.app.AlertDialog;
  38 import androidx.fragment.app.Fragment;
  39 import androidx.fragment.app.FragmentActivity;
  40 import androidx.lifecycle.LiveData;
  41 import androidx.lifecycle.ViewModelProvider;
  42 import androidx.recyclerview.widget.LinearLayoutManager;
  43 import androidx.recyclerview.widget.RecyclerView;
  44
  45 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
  46 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  47 import com.google.android.material.snackbar.BaseTransientBottomBar;
  48 import com.google.android.material.snackbar.Snackbar;
  49
  50 import net.ktnx.mobileledger.R;
  51 import net.ktnx.mobileledger.db.DB;
  52 import net.ktnx.mobileledger.db.TemplateAccount;
  53 import net.ktnx.mobileledger.db.TemplateHeader;
  54 import net.ktnx.mobileledger.json.API;
  55 import net.ktnx.mobileledger.model.Data;
  56 import net.ktnx.mobileledger.model.LedgerTransaction;
  57 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  58 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  59 import net.ktnx.mobileledger.ui.QRScanCapableFragment;
  60 import net.ktnx.mobileledger.ui.templates.TemplatesActivity;
  61 import net.ktnx.mobileledger.utils.Logger;
  62 import net.ktnx.mobileledger.utils.Misc;
  63 import net.ktnx.mobileledger.utils.SimpleDate;
  64
  65 import org.jetbrains.annotations.NotNull;
  66
  67 import java.util.ArrayList;
  68 import java.util.List;
  69 import java.util.Locale;
  70 import java.util.regex.Matcher;
  71 import java.util.regex.Pattern;
  72
  73 /**
  74  * A simple {@link Fragment} subclass.
  75  * Activities that contain this fragment must implement the
  76  * {@link OnNewTransactionFragmentInteractionListener} interface
  77  * to handle interaction events.
  78  */
  79
  80 // TODO: offer to undo account remove-on-swipe
  81
  82 public class NewTransactionFragment extends QRScanCapableFragment {
  83     private NewTransactionItemsAdapter listAdapter;
  84     private NewTransactionModel viewModel;
  85     private FloatingActionButton fab;
  86     private OnNewTransactionFragmentInteractionListener mListener;
  87     private MobileLedgerProfile mProfile;
  88     public NewTransactionFragment() {
  89         // Required empty public constructor
  90         setHasOptionsMenu(true);
  91     }
  92     private void startNewPatternActivity(String scanned) {
  93         Intent intent = new Intent(requireContext(), TemplatesActivity.class);
  94         Bundle args = new Bundle();
  95         args.putString(TemplatesActivity.ARG_ADD_TEMPLATE, scanned);
  96         requireContext().startActivity(intent, args);
  97     }
  98     private void alertNoTemplateMatch(String scanned) {
  99         MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(requireContext());
 100         builder.setCancelable(true)
 101                .setMessage(R.string.no_template_matches)
 102                .setPositiveButton(R.string.add_button,
 103                        (dialog, which) -> startNewPatternActivity(scanned))
 104                .create()
 105                .show();
 106     }
 107     protected void onQrScanned(String text) {
 108         Logger.debug("qr", String.format("Got QR scan result [%s]", text));
 109
 110         if (Misc.emptyIsNull(text) == null)
 111             return;
 112
 113         LiveData<List<TemplateHeader>> allTemplates = DB.get()
 114                                                         .getTemplateDAO()
 115                                                         .getTemplates();
 116         allTemplates.observe(getViewLifecycleOwner(), templateHeaders -> {
 117             ArrayList<TemplateHeader> matchingFallbackTemplates = new ArrayList<>();
 118             ArrayList<TemplateHeader> matchingTemplates = new ArrayList<>();
 119
 120             for (TemplateHeader ph : templateHeaders) {
 121                 String patternSource = ph.getRegularExpression();
 122                 if (Misc.emptyIsNull(patternSource) == null)
 123                     continue;
 124                 try {
 125                     Pattern pattern = Pattern.compile(patternSource);
 126                     Matcher matcher = pattern.matcher(text);
 127                     if (!matcher.matches())
 128                         continue;
 129
 130                     Logger.debug("pattern",
 131                             String.format("Pattern '%s' [%s] matches '%s'", ph.getName(),
 132                                     patternSource, text));
 133                     if (ph.isFallback())
 134                         matchingFallbackTemplates.add(ph);
 135                     else
 136                         matchingTemplates.add(ph);
 137                 }
 138                 catch (ParcelFormatException e) {
 139                     // ignored
 140                     Logger.debug("pattern",
 141                             String.format("Error compiling regular expression '%s'", patternSource),
 142                             e);
 143                 }
 144             }
 145
 146             if (matchingTemplates.isEmpty())
 147                 matchingTemplates = matchingFallbackTemplates;
 148
 149             if (matchingTemplates.isEmpty())
 150                 alertNoTemplateMatch(text);
 151             else if (matchingTemplates.size() == 1)
 152                 applyTemplate(matchingTemplates.get(0), text);
 153             else
 154                 chooseTemplate(matchingTemplates, text);
 155         });
 156     }
 157     private void chooseTemplate(ArrayList<TemplateHeader> matchingTemplates, String matchedText) {
 158         final String templateNameColumn = "name";
 159         AbstractCursor cursor = new AbstractCursor() {
 160             @Override
 161             public int getCount() {
 162                 return matchingTemplates.size();
 163             }
 164             @Override
 165             public String[] getColumnNames() {
 166                 return new String[]{"_id", templateNameColumn};
 167             }
 168             @Override
 169             public String getString(int column) {
 170                 if (column == 0)
 171                     return String.valueOf(getPosition());
 172                 return matchingTemplates.get(getPosition())
 173                                         .getName();
 174             }
 175             @Override
 176             public short getShort(int column) {
 177                 if (column == 0)
 178                     return (short) getPosition();
 179                 return -1;
 180             }
 181             @Override
 182             public int getInt(int column) {
 183                 return getShort(column);
 184             }
 185             @Override
 186             public long getLong(int column) {
 187                 return getShort(column);
 188             }
 189             @Override
 190             public float getFloat(int column) {
 191                 return getShort(column);
 192             }
 193             @Override
 194             public double getDouble(int column) {
 195                 return getShort(column);
 196             }
 197             @Override
 198             public boolean isNull(int column) {
 199                 return false;
 200             }
 201             @Override
 202             public int getColumnCount() {
 203                 return 2;
 204             }
 205         };
 206
 207         MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(requireContext());
 208         builder.setCancelable(true)
 209                .setTitle(R.string.choose_template_to_apply)
 210                .setIcon(R.drawable.ic_baseline_auto_graph_24)
 211                .setSingleChoiceItems(cursor, -1, templateNameColumn, (dialog, which) -> {
 212                    applyTemplate(matchingTemplates.get(which), matchedText);
 213                    dialog.dismiss();
 214                })
 215                .create()
 216                .show();
 217     }
 218     private void applyTemplate(TemplateHeader patternHeader, String text) {
 219         Pattern pattern = Pattern.compile(patternHeader.getRegularExpression());
 220
 221         Matcher m = pattern.matcher(text);
 222
 223         if (!m.matches()) {
 224             Snackbar.make(requireView(), R.string.pattern_does_not_match,
 225                     BaseTransientBottomBar.LENGTH_INDEFINITE)
 226                     .show();
 227             return;
 228         }
 229
 230         SimpleDate transactionDate;
 231         {
 232             int day = extractIntFromMatches(m, patternHeader.getDateDayMatchGroup(),
 233                     patternHeader.getDateDay());
 234             int month = extractIntFromMatches(m, patternHeader.getDateMonthMatchGroup(),
 235                     patternHeader.getDateMonth());
 236             int year = extractIntFromMatches(m, patternHeader.getDateYearMatchGroup(),
 237                     patternHeader.getDateYear());
 238
 239             SimpleDate today = SimpleDate.today();
 240             if (year <= 0)
 241                 year = today.year;
 242             if (month <= 0)
 243                 month = today.month;
 244             if (day <= 0)
 245                 day = today.day;
 246
 247             transactionDate = new SimpleDate(year, month, day);
 248
 249             Logger.debug("pattern", "setting transaction date to " + transactionDate);
 250         }
 251
 252         NewTransactionModel.Item head = viewModel.getItem(0);
 253         head.ensureType(NewTransactionModel.ItemType.generalData);
 254         final String transactionDescription =
 255                 extractStringFromMatches(m, patternHeader.getTransactionDescriptionMatchGroup(),
 256                         patternHeader.getTransactionDescription());
 257         head.setDescription(transactionDescription);
 258         Logger.debug("pattern", "Setting transaction description to " + transactionDescription);
 259         final String transactionComment =
 260                 extractStringFromMatches(m, patternHeader.getTransactionCommentMatchGroup(),
 261                         patternHeader.getTransactionComment());
 262         head.setTransactionComment(transactionComment);
 263         Logger.debug("pattern", "Setting transaction comment to " + transactionComment);
 264         head.setDate(transactionDate);
 265         listAdapter.notifyItemChanged(0);
 266
 267         DB.get()
 268           .getTemplateDAO()
 269           .getTemplateWithAccounts(patternHeader.getId())
 270           .observe(getViewLifecycleOwner(), entry -> {
 271               int rowIndex = 0;
 272               final boolean accountsInInitialState = viewModel.accountsInInitialState();
 273               for (TemplateAccount acc : entry.accounts) {
 274                   rowIndex++;
 275
 276                   String accountName = extractStringFromMatches(m, acc.getAccountNameMatchGroup(),
 277                           acc.getAccountName());
 278                   String accountComment =
 279                           extractStringFromMatches(m, acc.getAccountCommentMatchGroup(),
 280                                   acc.getAccountComment());
 281                   Float amount =
 282                           extractFloatFromMatches(m, acc.getAmountMatchGroup(), acc.getAmount());
 283                   if (amount != null && acc.getNegateAmount() != null && acc.getNegateAmount())
 284                       amount = -amount;
 285
 286                   if (accountsInInitialState) {
 287                       NewTransactionModel.Item item = viewModel.getItem(rowIndex);
 288                       if (item == null) {
 289                           Logger.debug("pattern", String.format(Locale.US,
 290                                   "Adding new account item [%s][c:%s][a:%s]", accountName,
 291                                   accountComment, amount));
 292                           final LedgerTransactionAccount ledgerAccount =
 293                                   new LedgerTransactionAccount(accountName);
 294                           ledgerAccount.setComment(accountComment);
 295                           if (amount != null)
 296                               ledgerAccount.setAmount(amount);
 297                           // TODO currency
 298                           viewModel.addAccount(ledgerAccount);
 299                           listAdapter.notifyItemInserted(viewModel.items.size() - 1);
 300                       }
 301                       else {
 302                           Logger.debug("pattern", String.format(Locale.US,
 303                                   "Stamping account item #%d [%s][c:%s][a:%s]", rowIndex,
 304                                   accountName, accountComment, amount));
 305
 306                           item.setAccountName(accountName);
 307                           item.setComment(accountComment);
 308                           if (amount != null)
 309                               item.getAccount()
 310                                   .setAmount(amount);
 311
 312                           listAdapter.notifyItemChanged(rowIndex);
 313                       }
 314                   }
 315                   else {
 316                       final LedgerTransactionAccount transactionAccount =
 317                               new LedgerTransactionAccount(accountName);
 318                       transactionAccount.setComment(accountComment);
 319                       if (amount != null)
 320                           transactionAccount.setAmount(amount);
 321                       // TODO currency
 322                       Logger.debug("pattern", String.format(Locale.US,
 323                               "Adding trailing account item [%s][c:%s][a:%s]", accountName,
 324                               accountComment, amount));
 325
 326                       viewModel.addAccount(transactionAccount);
 327                       listAdapter.notifyItemInserted(viewModel.items.size() - 1);
 328                   }
 329               }
 330
 331               listAdapter.checkTransactionSubmittable();
 332           });
 333     }
 334     private int extractIntFromMatches(Matcher m, Integer group, Integer literal) {
 335         if (literal != null)
 336             return literal;
 337
 338         if (group != null) {
 339             int grp = group;
 340             if (grp > 0 & grp <= m.groupCount())
 341                 try {
 342                     return Integer.parseInt(m.group(grp));
 343                 }
 344                 catch (NumberFormatException e) {
 345                     Snackbar.make(requireView(),
 346                             "Error extracting transaction date: " + e.getMessage(),
 347                             BaseTransientBottomBar.LENGTH_INDEFINITE)
 348                             .show();
 349                 }
 350         }
 351
 352         return 0;
 353     }
 354     private String extractStringFromMatches(Matcher m, Integer group, String literal) {
 355         if (literal != null)
 356             return literal;
 357
 358         if (group != null) {
 359             int grp = group;
 360             if (grp > 0 & grp <= m.groupCount())
 361                 return m.group(grp);
 362         }
 363
 364         return null;
 365     }
 366     private Float extractFloatFromMatches(Matcher m, Integer group, Float literal) {
 367         if (literal != null)
 368             return literal;
 369
 370         if (group != null) {
 371             int grp = group;
 372             if (grp > 0 & grp <= m.groupCount())
 373                 try {
 374                     return Float.valueOf(m.group(grp));
 375                 }
 376                 catch (NumberFormatException e) {
 377                     Snackbar.make(requireView(),
 378                             "Error extracting transaction amount: " + e.getMessage(),
 379                             BaseTransientBottomBar.LENGTH_INDEFINITE)
 380                             .show();
 381                 }
 382         }
 383
 384         return null;
 385     }
 386     @Override
 387     public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
 388         super.onCreateOptionsMenu(menu, inflater);
 389         final FragmentActivity activity = getActivity();
 390
 391         inflater.inflate(R.menu.new_transaction_fragment, menu);
 392
 393         menu.findItem(R.id.scan_qr)
 394             .setOnMenuItemClickListener(this::onScanQrAction);
 395
 396         menu.findItem(R.id.action_reset_new_transaction_activity)
 397             .setOnMenuItemClickListener(item -> {
 398                 listAdapter.reset();
 399                 return true;
 400             });
 401
 402         final MenuItem toggleCurrencyItem = menu.findItem(R.id.toggle_currency);
 403         toggleCurrencyItem.setOnMenuItemClickListener(item -> {
 404             viewModel.toggleCurrencyVisible();
 405             return true;
 406         });
 407         if (activity != null)
 408             viewModel.showCurrency.observe(activity, toggleCurrencyItem::setChecked);
 409
 410         final MenuItem toggleCommentsItem = menu.findItem(R.id.toggle_comments);
 411         toggleCommentsItem.setOnMenuItemClickListener(item -> {
 412             viewModel.toggleShowComments();
 413             return true;
 414         });
 415         if (activity != null)
 416             viewModel.showComments.observe(activity, toggleCommentsItem::setChecked);
 417     }
 418     private boolean onScanQrAction(MenuItem item) {
 419         try {
 420             scanQrLauncher.launch(null);
 421         }
 422         catch (Exception e) {
 423             Logger.debug("qr", "Error launching QR scanner", e);
 424         }
 425
 426         return true;
 427     }
 428     @Override
 429     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 430                              Bundle savedInstanceState) {
 431         // Inflate the layout for this fragment
 432         return inflater.inflate(R.layout.fragment_new_transaction, container, false);
 433     }
 434
 435     @Override
 436     public void onViewCreated(@NotNull View view, @Nullable Bundle savedInstanceState) {
 437         super.onViewCreated(view, savedInstanceState);
 438         FragmentActivity activity = getActivity();
 439         if (activity == null)
 440             throw new RSInvalidStateException(
 441                     "getActivity() returned null within onActivityCreated()");
 442
 443         viewModel = new ViewModelProvider(activity).get(NewTransactionModel.class);
 444         viewModel.observeDataProfile(this);
 445         mProfile = Data.getProfile();
 446         listAdapter = new NewTransactionItemsAdapter(viewModel, mProfile);
 447
 448         RecyclerView list = activity.findViewById(R.id.new_transaction_accounts);
 449         list.setAdapter(listAdapter);
 450         list.setLayoutManager(new LinearLayoutManager(activity));
 451
 452         Data.observeProfile(getViewLifecycleOwner(), profile -> {
 453             mProfile = profile;
 454             listAdapter.setProfile(profile);
 455         });
 456         listAdapter.notifyDataSetChanged();
 457         viewModel.isSubmittable()
 458                  .observe(getViewLifecycleOwner(), isSubmittable -> {
 459                      if (isSubmittable) {
 460                          if (fab != null) {
 461                              fab.show();
 462                          }
 463                      }
 464                      else {
 465                          if (fab != null) {
 466                              fab.hide();
 467                          }
 468                      }
 469                  });
 470 //        viewModel.checkTransactionSubmittable(listAdapter);
 471
 472         fab = activity.findViewById(R.id.fabAdd);
 473         fab.setOnClickListener(v -> onFabPressed());
 474
 475         boolean keep = false;
 476
 477         Bundle args = getArguments();
 478         if (args != null) {
 479             String error = args.getString("error");
 480             if (error != null) {
 481                 Logger.debug("new-trans-f", String.format("Got error: %s", error));
 482
 483                 Context context = getContext();
 484                 if (context != null) {
 485                     AlertDialog.Builder builder = new AlertDialog.Builder(context);
 486                     final Resources resources = context.getResources();
 487                     final StringBuilder message = new StringBuilder();
 488                     message.append(resources.getString(R.string.err_json_send_error_head));
 489                     message.append("\n\n");
 490                     message.append(error);
 491                     if (mProfile.getApiVersion()
 492                                 .equals(API.auto))
 493                         message.append(
 494                                 resources.getString(R.string.err_json_send_error_unsupported));
 495                     else {
 496                         message.append(resources.getString(R.string.err_json_send_error_tail));
 497                         builder.setPositiveButton(R.string.btn_profile_options, (dialog, which) -> {
 498                             Logger.debug("error", "will start profile editor");
 499                             MobileLedgerProfile.startEditProfileActivity(context, mProfile);
 500                         });
 501                     }
 502                     builder.setMessage(message);
 503                     builder.create()
 504                            .show();
 505                 }
 506                 else {
 507                     Snackbar.make(list, error, Snackbar.LENGTH_INDEFINITE)
 508                             .show();
 509                 }
 510                 keep = true;
 511             }
 512         }
 513
 514         int focused = 0;
 515         if (savedInstanceState != null) {
 516             keep |= savedInstanceState.getBoolean("keep", true);
 517             focused = savedInstanceState.getInt("focused", 0);
 518         }
 519
 520         if (!keep)
 521             viewModel.reset();
 522         else {
 523             viewModel.setFocusedItem(focused);
 524         }
 525
 526         ProgressBar p = activity.findViewById(R.id.progressBar);
 527         viewModel.observeBusyFlag(getViewLifecycleOwner(), isBusy -> {
 528             if (isBusy) {
 529 //                Handler h = new Handler();
 530 //                h.postDelayed(() -> {
 531 //                    if (viewModel.getBusyFlag())
 532 //                        p.setVisibility(View.VISIBLE);
 533 //
 534 //                }, 10);
 535                 p.setVisibility(View.VISIBLE);
 536             }
 537             else
 538                 p.setVisibility(View.INVISIBLE);
 539         });
 540     }
 541     @Override
 542     public void onSaveInstanceState(@NonNull Bundle outState) {
 543         super.onSaveInstanceState(outState);
 544         outState.putBoolean("keep", true);
 545         final int focusedItem = viewModel.getFocusedItem();
 546         outState.putInt("focused", focusedItem);
 547     }
 548     private void onFabPressed() {
 549         fab.hide();
 550         Misc.hideSoftKeyboard(this);
 551         if (mListener != null) {
 552             SimpleDate date = viewModel.getDate();
 553             LedgerTransaction tr =
 554                     new LedgerTransaction(null, date, viewModel.getDescription(), mProfile);
 555
 556             tr.setComment(viewModel.getComment());
 557             LedgerTransactionAccount emptyAmountAccount = null;
 558             float emptyAmountAccountBalance = 0;
 559             for (int i = 0; i < viewModel.getAccountCount(); i++) {
 560                 LedgerTransactionAccount acc =
 561                         new LedgerTransactionAccount(viewModel.getAccount(i));
 562                 if (acc.getAccountName()
 563                        .trim()
 564                        .isEmpty())
 565                     continue;
 566
 567                 if (acc.isAmountSet()) {
 568                     emptyAmountAccountBalance += acc.getAmount();
 569                 }
 570                 else {
 571                     emptyAmountAccount = acc;
 572                 }
 573
 574                 tr.addAccount(acc);
 575             }
 576
 577             if (emptyAmountAccount != null)
 578                 emptyAmountAccount.setAmount(-emptyAmountAccountBalance);
 579
 580             mListener.onTransactionSave(tr);
 581         }
 582     }
 583
 584     @Override
 585     public void onAttach(@NotNull Context context) {
 586         super.onAttach(context);
 587         if (context instanceof OnNewTransactionFragmentInteractionListener) {
 588             mListener = (OnNewTransactionFragmentInteractionListener) context;
 589         }
 590         else {
 591             throw new RuntimeException(
 592                     context.toString() + " must implement OnFragmentInteractionListener");
 593         }
 594     }
 595
 596     @Override
 597     public void onDetach() {
 598         super.onDetach();
 599         mListener = null;
 600     }
 601
 602     /**
 603      * This interface must be implemented by activities that contain this
 604      * fragment to allow an interaction in this fragment to be communicated
 605      * to the activity and potentially other fragments contained in that
 606      * activity.
 607      * <p>
 608      * See the Android Training lesson <a href=
 609      * "http://developer.android.com/training/basics/fragments/communicating.html"
 610      * >Communicating with Other Fragments</a> for more information.
 611      */
 612     public interface OnNewTransactionFragmentInteractionListener {
 613         void onTransactionSave(LedgerTransaction tr);
 614     }
 615 }