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