app/src/main/java/net/ktnx/mobileledger/async/RetrieveTransactionsTask.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.async;
  19
  20 import android.annotation.SuppressLint;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.os.AsyncTask;
  23 import android.os.OperationCanceledException;
  24
  25 import androidx.annotation.NonNull;
  26
  27 import net.ktnx.mobileledger.App;
  28 import net.ktnx.mobileledger.err.HTTPException;
  29 import net.ktnx.mobileledger.json.v1_15.AccountListParser;
  30 import net.ktnx.mobileledger.json.v1_15.ParsedBalance;
  31 import net.ktnx.mobileledger.json.v1_15.ParsedLedgerAccount;
  32 import net.ktnx.mobileledger.json.v1_15.ParsedLedgerTransaction;
  33 import net.ktnx.mobileledger.json.v1_15.TransactionListParser;
  34 import net.ktnx.mobileledger.model.Data;
  35 import net.ktnx.mobileledger.model.LedgerAccount;
  36 import net.ktnx.mobileledger.model.LedgerTransaction;
  37 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  38 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  39 import net.ktnx.mobileledger.ui.activity.MainActivity;
  40 import net.ktnx.mobileledger.utils.NetworkUtil;
  41
  42 import java.io.BufferedReader;
  43 import java.io.IOException;
  44 import java.io.InputStream;
  45 import java.io.InputStreamReader;
  46 import java.lang.ref.WeakReference;
  47 import java.net.HttpURLConnection;
  48 import java.net.MalformedURLException;
  49 import java.net.URLDecoder;
  50 import java.nio.charset.StandardCharsets;
  51 import java.text.ParseException;
  52 import java.util.ArrayList;
  53 import java.util.HashMap;
  54 import java.util.Locale;
  55 import java.util.Stack;
  56 import java.util.regex.Matcher;
  57 import java.util.regex.Pattern;
  58
  59 import static net.ktnx.mobileledger.utils.Logger.debug;
  60
  61
  62 public class RetrieveTransactionsTask
  63         extends AsyncTask<Void, RetrieveTransactionsTask.Progress, String> {
  64     private static final int MATCHING_TRANSACTIONS_LIMIT = 150;
  65     private static final Pattern reComment = Pattern.compile("^\\s*;");
  66     private static final Pattern reTransactionStart = Pattern.compile("<tr class=\"title\" " +
  67                                                                       "id=\"transaction-(\\d+)\"><td class=\"date\"[^\"]*>([\\d.-]+)</td>");
  68     private static final Pattern reTransactionDescription =
  69             Pattern.compile("<tr class=\"posting\" title=\"(\\S+)\\s(.+)");
  70     private static final Pattern reTransactionDetails =
  71             Pattern.compile("^\\s+(\\S[\\S\\s]+\\S)\\s\\s+([-+]?\\d[\\d,.]*)(?:\\s+(\\S+)$)?");
  72     private static final Pattern reEnd = Pattern.compile("\\bid=\"addmodal\"");
  73     private static final Pattern reDecimalPoint = Pattern.compile("\\.\\d\\d?$");
  74     private static final Pattern reDecimalComma = Pattern.compile(",\\d\\d?$");
  75     private WeakReference<MainActivity> contextRef;
  76     // %3A is '='
  77     private Pattern reAccountName = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  78     private Pattern reAccountValue = Pattern.compile(
  79             "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  80     private MobileLedgerProfile profile;
  81     public RetrieveTransactionsTask(WeakReference<MainActivity> contextRef,
  82                                     @NonNull MobileLedgerProfile profile) {
  83         this.contextRef = contextRef;
  84         this.profile = profile;
  85     }
  86     private static void L(String msg) {
  87         //debug("transaction-parser", msg);
  88     }
  89     @Override
  90     protected void onProgressUpdate(Progress... values) {
  91         super.onProgressUpdate(values);
  92         MainActivity context = getContext();
  93         if (context == null) return;
  94         context.onRetrieveProgress(values[0]);
  95     }
  96     @Override
  97     protected void onPreExecute() {
  98         super.onPreExecute();
  99         MainActivity context = getContext();
 100         if (context == null) return;
 101         context.onRetrieveStart();
 102     }
 103     @Override
 104     protected void onPostExecute(String error) {
 105         super.onPostExecute(error);
 106         MainActivity context = getContext();
 107         if (context == null) return;
 108         context.onRetrieveDone(error);
 109     }
 110     @Override
 111     protected void onCancelled() {
 112         super.onCancelled();
 113         MainActivity context = getContext();
 114         if (context == null) return;
 115         context.onRetrieveDone(null);
 116     }
 117     private String retrieveTransactionListLegacy()
 118             throws IOException, ParseException, HTTPException {
 119         Progress progress = new Progress();
 120         int maxTransactionId = Progress.INDETERMINATE;
 121         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 122         HashMap<String, Void> accountNames = new HashMap<>();
 123         HashMap<String, LedgerAccount> syntheticAccounts = new HashMap<>();
 124         LedgerAccount lastAccount = null, prevAccount = null;
 125
 126         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "journal");
 127         http.setAllowUserInteraction(false);
 128         publishProgress(progress);
 129         switch (http.getResponseCode()) {
 130             case 200:
 131                 break;
 132             default:
 133                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 134         }
 135
 136         SQLiteDatabase db = App.getDatabase();
 137         try (InputStream resp = http.getInputStream()) {
 138             if (http.getResponseCode() != 200)
 139                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 140             db.beginTransaction();
 141             try {
 142                 prepareDbForRetrieval(db, profile);
 143
 144                 int matchedTransactionsCount = 0;
 145
 146
 147                 ParserState state = ParserState.EXPECTING_ACCOUNT;
 148                 String line;
 149                 BufferedReader buf =
 150                         new BufferedReader(new InputStreamReader(resp, StandardCharsets.UTF_8));
 151
 152                 int processedTransactionCount = 0;
 153                 int transactionId = 0;
 154                 LedgerTransaction transaction = null;
 155                 LINES:
 156                 while ((line = buf.readLine()) != null) {
 157                     throwIfCancelled();
 158                     Matcher m;
 159                     m = reComment.matcher(line);
 160                     if (m.find()) {
 161                         // TODO: comments are ignored for now
 162 //                            Log.v("transaction-parser", "Ignoring comment");
 163                         continue;
 164                     }
 165                     //L(String.format("State is %d", updating));
 166                     switch (state) {
 167                         case EXPECTING_ACCOUNT:
 168                             if (line.equals("<h2>General Journal</h2>")) {
 169                                 state = ParserState.EXPECTING_TRANSACTION;
 170                                 L("→ expecting transaction");
 171                                 // commit the current transaction and start a new one
 172                                 // the account list in the UI should reflect the (committed)
 173                                 // state of the database
 174                                 db.setTransactionSuccessful();
 175                                 db.endTransaction();
 176                                 Data.accounts.setList(accountList);
 177                                 db.beginTransaction();
 178                                 continue;
 179                             }
 180                             m = reAccountName.matcher(line);
 181                             if (m.find()) {
 182                                 String acct_encoded = m.group(1);
 183                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
 184                                 acct_name = acct_name.replace("\"", "");
 185                                 L(String.format("found account: %s", acct_name));
 186
 187                                 prevAccount = lastAccount;
 188                                 lastAccount = profile.tryLoadAccount(db, acct_name);
 189                                 if (lastAccount == null) lastAccount = new LedgerAccount(acct_name);
 190                                 else lastAccount.removeAmounts();
 191                                 profile.storeAccount(db, lastAccount);
 192
 193                                 if (prevAccount != null) prevAccount
 194                                         .setHasSubAccounts(prevAccount.isParentOf(lastAccount));
 195                                 // make sure the parent account(s) are present,
 196                                 // synthesising them if necessary
 197                                 // this happens when the (missing-in-HTML) parent account has
 198                                 // only one child so we create a synthetic parent account record,
 199                                 // copying the amounts when child's amounts are parsed
 200                                 String parentName = lastAccount.getParentName();
 201                                 if (parentName != null) {
 202                                     Stack<String> toAppend = new Stack<>();
 203                                     while (parentName != null) {
 204                                         if (accountNames.containsKey(parentName)) break;
 205                                         toAppend.push(parentName);
 206                                         parentName = new LedgerAccount(parentName).getParentName();
 207                                     }
 208                                     syntheticAccounts.clear();
 209                                     while (!toAppend.isEmpty()) {
 210                                         String aName = toAppend.pop();
 211                                         LedgerAccount acc = profile.tryLoadAccount(db, aName);
 212                                         if (acc == null) {
 213                                             acc = new LedgerAccount(aName);
 214                                             acc.setHiddenByStar(lastAccount.isHiddenByStar());
 215                                             acc.setExpanded(!lastAccount.hasSubAccounts() ||
 216                                                             lastAccount.isExpanded());
 217                                         }
 218                                         acc.setHasSubAccounts(true);
 219                                         acc.removeAmounts();    // filled below when amounts are parsed
 220                                         if (acc.isVisible(accountList))
 221                                             accountList.add(acc);
 222                                         L(String.format("gap-filling with %s", aName));
 223                                         accountNames.put(aName, null);
 224                                         profile.storeAccount(db, acc);
 225                                         syntheticAccounts.put(aName, acc);
 226                                     }
 227                                 }
 228
 229                                 if (lastAccount.isVisible(accountList))
 230                                     accountList.add(lastAccount);
 231                                 accountNames.put(acct_name, null);
 232
 233                                 state = ParserState.EXPECTING_ACCOUNT_AMOUNT;
 234                                 L("→ expecting account amount");
 235                             }
 236                             break;
 237
 238                         case EXPECTING_ACCOUNT_AMOUNT:
 239                             m = reAccountValue.matcher(line);
 240                             boolean match_found = false;
 241                             while (m.find()) {
 242                                 throwIfCancelled();
 243
 244                                 match_found = true;
 245                                 String value = m.group(1);
 246                                 String currency = m.group(2);
 247                                 if (currency == null) currency = "";
 248
 249                                 {
 250                                     Matcher tmpM = reDecimalComma.matcher(value);
 251                                     if (tmpM.find()) {
 252                                         value = value.replace(".", "");
 253                                         value = value.replace(',', '.');
 254                                     }
 255
 256                                     tmpM = reDecimalPoint.matcher(value);
 257                                     if (tmpM.find()) {
 258                                         value = value.replace(",", "");
 259                                         value = value.replace(" ", "");
 260                                     }
 261                                 }
 262                                 L("curr=" + currency + ", value=" + value);
 263                                 final float val = Float.parseFloat(value);
 264                                 profile.storeAccountValue(db, lastAccount.getName(), currency, val);
 265                                 lastAccount.addAmount(val, currency);
 266                                 for (LedgerAccount syn : syntheticAccounts.values()) {
 267                                     L(String.format(Locale.ENGLISH, "propagating %s %1.2f to %s",
 268                                             currency, val, syn.getName()));
 269                                     syn.addAmount(val, currency);
 270                                     profile.storeAccountValue(db, syn.getName(), currency, val);
 271                                 }
 272                             }
 273
 274                             if (match_found) {
 275                                 syntheticAccounts.clear();
 276                                 state = ParserState.EXPECTING_ACCOUNT;
 277                                 L("→ expecting account");
 278                             }
 279
 280                             break;
 281
 282                         case EXPECTING_TRANSACTION:
 283                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 284                             m = reTransactionStart.matcher(line);
 285                             if (m.find()) {
 286                                 transactionId = Integer.valueOf(m.group(1));
 287                                 state = ParserState.EXPECTING_TRANSACTION_DESCRIPTION;
 288                                 L(String.format(Locale.ENGLISH,
 289                                         "found transaction %d → expecting description",
 290                                         transactionId));
 291                                 progress.setProgress(++processedTransactionCount);
 292                                 if (maxTransactionId < transactionId)
 293                                     maxTransactionId = transactionId;
 294                                 if ((progress.getTotal() == Progress.INDETERMINATE) ||
 295                                     (progress.getTotal() < transactionId))
 296                                     progress.setTotal(transactionId);
 297                                 publishProgress(progress);
 298                             }
 299                             m = reEnd.matcher(line);
 300                             if (m.find()) {
 301                                 L("--- transaction value complete ---");
 302                                 break LINES;
 303                             }
 304                             break;
 305
 306                         case EXPECTING_TRANSACTION_DESCRIPTION:
 307                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 308                             m = reTransactionDescription.matcher(line);
 309                             if (m.find()) {
 310                                 if (transactionId == 0) throw new TransactionParserException(
 311                                         "Transaction Id is 0 while expecting " + "description");
 312
 313                                 String date = m.group(1);
 314                                 try {
 315                                     int equalsIndex = date.indexOf('=');
 316                                     if (equalsIndex >= 0) date = date.substring(equalsIndex + 1);
 317                                     transaction =
 318                                             new LedgerTransaction(transactionId, date, m.group(2));
 319                                 }
 320                                 catch (ParseException e) {
 321                                     e.printStackTrace();
 322                                     return String.format("Error parsing date '%s'", date);
 323                                 }
 324                                 state = ParserState.EXPECTING_TRANSACTION_DETAILS;
 325                                 L(String.format(Locale.ENGLISH,
 326                                         "transaction %d created for %s (%s) →" +
 327                                         " expecting details", transactionId, date, m.group(2)));
 328                             }
 329                             break;
 330
 331                         case EXPECTING_TRANSACTION_DETAILS:
 332                             if (line.isEmpty()) {
 333                                 // transaction data collected
 334                                 if (transaction.existsInDb(db)) {
 335                                     profile.markTransactionAsPresent(db, transaction);
 336                                     matchedTransactionsCount++;
 337
 338                                     if (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT) {
 339                                         profile.markTransactionsBeforeTransactionAsPresent(db,
 340                                                 transaction);
 341                                         progress.setTotal(progress.getProgress());
 342                                         publishProgress(progress);
 343                                         break LINES;
 344                                     }
 345                                 }
 346                                 else {
 347                                     profile.storeTransaction(db, transaction);
 348                                     matchedTransactionsCount = 0;
 349                                     progress.setTotal(maxTransactionId);
 350                                 }
 351
 352                                 state = ParserState.EXPECTING_TRANSACTION;
 353                                 L(String.format("transaction %s saved → expecting transaction",
 354                                         transaction.getId()));
 355                                 transaction.finishLoading();
 356
 357 // sounds like a good idea, but transaction-1 may not be the first one chronologically
 358 // for example, when you add the initial seeding transaction after entering some others
 359 //                                            if (transactionId == 1) {
 360 //                                                L("This was the initial transaction. Terminating " +
 361 //                                                  "parser");
 362 //                                                break LINES;
 363 //                                            }
 364                             }
 365                             else {
 366                                 m = reTransactionDetails.matcher(line);
 367                                 if (m.find()) {
 368                                     String acc_name = m.group(1);
 369                                     String amount = m.group(2);
 370                                     String currency = m.group(3);
 371                                     if (currency == null) currency = "";
 372                                     amount = amount.replace(',', '.');
 373                                     transaction.addAccount(new LedgerTransactionAccount(acc_name,
 374                                             Float.valueOf(amount), currency, null));
 375                                     L(String.format(Locale.ENGLISH, "%d: %s = %s",
 376                                             transaction.getId(), acc_name, amount));
 377                                 }
 378                                 else throw new IllegalStateException(
 379                                         String.format("Can't parse transaction %d " + "details: %s",
 380                                                 transactionId, line));
 381                             }
 382                             break;
 383                         default:
 384                             throw new RuntimeException(
 385                                     String.format("Unknown parser updating %s", state.name()));
 386                     }
 387                 }
 388
 389                 throwIfCancelled();
 390
 391                 profile.deleteNotPresentTransactions(db);
 392                 db.setTransactionSuccessful();
 393
 394                 profile.setLastUpdateStamp();
 395
 396                 return null;
 397             }
 398             finally {
 399                 db.endTransaction();
 400             }
 401         }
 402     }
 403     private void prepareDbForRetrieval(SQLiteDatabase db, MobileLedgerProfile profile) {
 404         db.execSQL("UPDATE transactions set keep=0 where profile=?",
 405                 new String[]{profile.getUuid()});
 406         db.execSQL("update account_values set keep=0 where profile=?;",
 407                 new String[]{profile.getUuid()});
 408         db.execSQL("update accounts set keep=0 where profile=?;", new String[]{profile.getUuid()});
 409     }
 410     private boolean retrieveAccountList() throws IOException, HTTPException {
 411         Progress progress = new Progress();
 412
 413         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "accounts");
 414         http.setAllowUserInteraction(false);
 415         switch (http.getResponseCode()) {
 416             case 200:
 417                 break;
 418             case 404:
 419                 return false;
 420             default:
 421                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 422         }
 423         publishProgress(progress);
 424         SQLiteDatabase db = App.getDatabase();
 425         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 426         boolean listFilledOK = false;
 427         try (InputStream resp = http.getInputStream()) {
 428             if (http.getResponseCode() != 200)
 429                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 430
 431             db.beginTransaction();
 432             try {
 433                 profile.markAccountsAsNotPresent(db);
 434
 435                 AccountListParser parser = new AccountListParser(resp);
 436
 437                 LedgerAccount prevAccount = null;
 438
 439                 while (true) {
 440                     throwIfCancelled();
 441                     ParsedLedgerAccount parsedAccount = parser.nextAccount();
 442                     if (parsedAccount == null) break;
 443
 444                     LedgerAccount acc = profile.tryLoadAccount(db, parsedAccount.getAname());
 445                     if (acc == null) acc = new LedgerAccount(parsedAccount.getAname());
 446                     else acc.removeAmounts();
 447
 448                     profile.storeAccount(db, acc);
 449                     String lastCurrency = null;
 450                     float lastCurrencyAmount = 0;
 451                     for (ParsedBalance b : parsedAccount.getAibalance()) {
 452                         final String currency = b.getAcommodity();
 453                         final float amount = b.getAquantity().asFloat();
 454                         if (currency.equals(lastCurrency)) lastCurrencyAmount += amount;
 455                         else {
 456                             if (lastCurrency != null) {
 457                                 profile.storeAccountValue(db, acc.getName(), lastCurrency,
 458                                         lastCurrencyAmount);
 459                                 acc.addAmount(lastCurrencyAmount, lastCurrency);
 460                             }
 461                             lastCurrency = currency;
 462                             lastCurrencyAmount = amount;
 463                         }
 464                     }
 465                     if (lastCurrency != null) {
 466                         profile.storeAccountValue(db, acc.getName(), lastCurrency,
 467                                 lastCurrencyAmount);
 468                         acc.addAmount(lastCurrencyAmount, lastCurrency);
 469                     }
 470
 471                     if (acc.isVisible(accountList)) accountList.add(acc);
 472
 473                     if (prevAccount != null) {
 474                         prevAccount.setHasSubAccounts(
 475                                 acc.getName().startsWith(prevAccount.getName() + ":"));
 476                     }
 477
 478                     prevAccount = acc;
 479                 }
 480                 throwIfCancelled();
 481
 482                 profile.deleteNotPresentAccounts(db);
 483                 throwIfCancelled();
 484                 db.setTransactionSuccessful();
 485                 listFilledOK = true;
 486             }
 487             finally {
 488                 db.endTransaction();
 489             }
 490         }
 491         // should not be set in the DB transaction, because of a possible deadlock
 492         // with the main and DbOpQueueRunner threads
 493         if (listFilledOK) Data.accounts.setList(accountList);
 494
 495         return true;
 496     }
 497     private boolean retrieveTransactionList() throws IOException, ParseException, HTTPException {
 498         Progress progress = new Progress();
 499         int maxTransactionId = Progress.INDETERMINATE;
 500
 501         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "transactions");
 502         http.setAllowUserInteraction(false);
 503         publishProgress(progress);
 504         switch (http.getResponseCode()) {
 505             case 200:
 506                 break;
 507             case 404:
 508                 return false;
 509             default:
 510                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 511         }
 512         SQLiteDatabase db = App.getDatabase();
 513         try (InputStream resp = http.getInputStream()) {
 514             if (http.getResponseCode() != 200)
 515                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 516             throwIfCancelled();
 517             db.beginTransaction();
 518             try {
 519                 profile.markTransactionsAsNotPresent(db);
 520
 521                 int matchedTransactionsCount = 0;
 522                 TransactionListParser parser = new TransactionListParser(resp);
 523
 524                 int processedTransactionCount = 0;
 525
 526                 DetectedTransactionOrder transactionOrder = DetectedTransactionOrder.UNKNOWN;
 527                 int orderAccumulator = 0;
 528                 int lastTransactionId = 0;
 529
 530                 while (true) {
 531                     throwIfCancelled();
 532                     ParsedLedgerTransaction parsedTransaction = parser.nextTransaction();
 533                     throwIfCancelled();
 534                     if (parsedTransaction == null) break;
 535
 536                     LedgerTransaction transaction = parsedTransaction.asLedgerTransaction();
 537                     if (transaction.getId() > lastTransactionId) orderAccumulator++;
 538                     else orderAccumulator--;
 539                     lastTransactionId = transaction.getId();
 540                     if (transactionOrder == DetectedTransactionOrder.UNKNOWN) {
 541                         if (orderAccumulator > 30) {
 542                             transactionOrder = DetectedTransactionOrder.FILE;
 543                             debug("rtt", String.format(Locale.ENGLISH,
 544                                     "Detected native file order after %d transactions (factor %d)",
 545                                     processedTransactionCount, orderAccumulator));
 546                             progress.setTotal(Data.transactions.size());
 547                         }
 548                         else if (orderAccumulator < -30) {
 549                             transactionOrder = DetectedTransactionOrder.REVERSE_CHRONOLOGICAL;
 550                             debug("rtt", String.format(Locale.ENGLISH,
 551                                     "Detected reverse chronological order after %d transactions (factor %d)",
 552                                     processedTransactionCount, orderAccumulator));
 553                         }
 554                     }
 555
 556                     if (transaction.existsInDb(db)) {
 557                         profile.markTransactionAsPresent(db, transaction);
 558                         matchedTransactionsCount++;
 559
 560                         if ((transactionOrder == DetectedTransactionOrder.REVERSE_CHRONOLOGICAL) &&
 561                             (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT))
 562                         {
 563                             profile.markTransactionsBeforeTransactionAsPresent(db, transaction);
 564                             progress.setTotal(progress.getProgress());
 565                             publishProgress(progress);
 566                             db.setTransactionSuccessful();
 567                             profile.setLastUpdateStamp();
 568                             return true;
 569                         }
 570                     }
 571                     else {
 572                         profile.storeTransaction(db, transaction);
 573                         matchedTransactionsCount = 0;
 574                         progress.setTotal(maxTransactionId);
 575                     }
 576
 577
 578                     if ((transactionOrder != DetectedTransactionOrder.UNKNOWN) &&
 579                         ((progress.getTotal() == Progress.INDETERMINATE) ||
 580                          (progress.getTotal() < transaction.getId())))
 581                         progress.setTotal(transaction.getId());
 582
 583                     progress.setProgress(++processedTransactionCount);
 584                     publishProgress(progress);
 585                 }
 586
 587                 throwIfCancelled();
 588                 profile.deleteNotPresentTransactions(db);
 589                 throwIfCancelled();
 590                 db.setTransactionSuccessful();
 591                 profile.setLastUpdateStamp();
 592             }
 593             finally {
 594                 db.endTransaction();
 595             }
 596         }
 597
 598         return true;
 599     }
 600
 601     @SuppressLint("DefaultLocale")
 602     @Override
 603     protected String doInBackground(Void... params) {
 604         Data.backgroundTaskStarted();
 605         try {
 606             if (!retrieveAccountList() || !retrieveTransactionList())
 607                 return retrieveTransactionListLegacy();
 608             return null;
 609         }
 610         catch (MalformedURLException e) {
 611             e.printStackTrace();
 612             return "Invalid server URL";
 613         }
 614         catch (HTTPException e) {
 615             e.printStackTrace();
 616             return String.format("HTTP error %d: %s", e.getResponseCode(), e.getResponseMessage());
 617         }
 618         catch (IOException e) {
 619             e.printStackTrace();
 620             return e.getLocalizedMessage();
 621         }
 622         catch (ParseException e) {
 623             e.printStackTrace();
 624             return "Network error";
 625         }
 626         catch (OperationCanceledException e) {
 627             e.printStackTrace();
 628             return "Operation cancelled";
 629         }
 630         finally {
 631             Data.backgroundTaskFinished();
 632         }
 633     }
 634     private MainActivity getContext() {
 635         return contextRef.get();
 636     }
 637     private void throwIfCancelled() {
 638         if (isCancelled()) throw new OperationCanceledException(null);
 639     }
 640     enum DetectedTransactionOrder {UNKNOWN, REVERSE_CHRONOLOGICAL, FILE}
 641
 642     private enum ParserState {
 643         EXPECTING_ACCOUNT, EXPECTING_ACCOUNT_AMOUNT, EXPECTING_JOURNAL, EXPECTING_TRANSACTION,
 644         EXPECTING_TRANSACTION_DESCRIPTION, EXPECTING_TRANSACTION_DETAILS
 645     }
 646
 647     public class Progress {
 648         public static final int INDETERMINATE = -1;
 649         private int progress;
 650         private int total;
 651         Progress() {
 652             this(INDETERMINATE, INDETERMINATE);
 653         }
 654         Progress(int progress, int total) {
 655             this.progress = progress;
 656             this.total = total;
 657         }
 658         public int getProgress() {
 659             return progress;
 660         }
 661         protected void setProgress(int progress) {
 662             this.progress = progress;
 663         }
 664         public int getTotal() {
 665             return total;
 666         }
 667         protected void setTotal(int total) {
 668             this.total = total;
 669         }
 670     }
 671
 672     private class TransactionParserException extends IllegalStateException {
 673         TransactionParserException(String message) {
 674             super(message);
 675         }
 676     }
 677 }