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,
 256                                                 val);
 257                                     }
 258                                 }
 259
 260                                 if (match_found) {
 261                                     state = ParserState.EXPECTING_ACCOUNT;
 262                                     L("→ expecting account");
 263                                 }
 264
 265                                 break;
 266
 267                             case EXPECTING_TRANSACTION:
 268                                 if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 269                                 m = reTransactionStart.matcher(line);
 270                                 if (m.find()) {
 271                                     transactionId = Integer.valueOf(m.group(1));
 272                                     state = ParserState.EXPECTING_TRANSACTION_DESCRIPTION;
 273                                     L(String.format(Locale.ENGLISH,
 274                                             "found transaction %d → expecting description",
 275                                             transactionId));
 276                                     progress.setProgress(++processedTransactionCount);
 277                                     if (maxTransactionId < transactionId)
 278                                         maxTransactionId = transactionId;
 279                                     if ((progress.getTotal() == Progress.INDETERMINATE) ||
 280                                         (progress.getTotal() < transactionId))
 281                                         progress.setTotal(transactionId);
 282                                     publishProgress(progress);
 283                                 }
 284                                 m = reEnd.matcher(line);
 285                                 if (m.find()) {
 286                                     L("--- transaction value complete ---");
 287                                     break LINES;
 288                                 }
 289                                 break;
 290
 291                             case EXPECTING_TRANSACTION_DESCRIPTION:
 292                                 if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 293                                 m = reTransactionDescription.matcher(line);
 294                                 if (m.find()) {
 295                                     if (transactionId == 0) throw new TransactionParserException(
 296                                             "Transaction Id is 0 while expecting " + "description");
 297
 298                                     String date = m.group(1);
 299                                     try {
 300                                         int equalsIndex = date.indexOf('=');
 301                                         if (equalsIndex >= 0)
 302                                             date = date.substring(equalsIndex + 1);
 303                                         transaction = new LedgerTransaction(transactionId, date,
 304                                                 m.group(2));
 305                                     }
 306                                     catch (ParseException e) {
 307                                         e.printStackTrace();
 308                                         return String.format("Error parsing date '%s'", date);
 309                                     }
 310                                     state = ParserState.EXPECTING_TRANSACTION_DETAILS;
 311                                     L(String.format(Locale.ENGLISH,
 312                                             "transaction %d created for %s (%s) →" +
 313                                             " expecting details", transactionId, date, m.group(2)));
 314                                 }
 315                                 break;
 316
 317                             case EXPECTING_TRANSACTION_DETAILS:
 318                                 if (line.isEmpty()) {
 319                                     // transaction data collected
 320                                     if (transaction.existsInDb(db)) {
 321                                         profile.markTransactionAsPresent(db, transaction);
 322                                         matchedTransactionsCount++;
 323
 324                                         if (matchedTransactionsCount ==
 325                                             MATCHING_TRANSACTIONS_LIMIT)
 326                                         {
 327                                             profile.markTransactionsBeforeTransactionAsPresent(db,
 328                                                     transaction);
 329                                             progress.setTotal(progress.getProgress());
 330                                             publishProgress(progress);
 331                                             break LINES;
 332                                         }
 333                                     }
 334                                     else {
 335                                         profile.storeTransaction(db, transaction);
 336                                         matchedTransactionsCount = 0;
 337                                         progress.setTotal(maxTransactionId);
 338                                     }
 339
 340                                     state = ParserState.EXPECTING_TRANSACTION;
 341                                     L(String.format("transaction %s saved → expecting transaction",
 342                                             transaction.getId()));
 343                                     transaction.finishLoading();
 344
 345 // sounds like a good idea, but transaction-1 may not be the first one chronologically
 346 // for example, when you add the initial seeding transaction after entering some others
 347 //                                            if (transactionId == 1) {
 348 //                                                L("This was the initial transaction. Terminating " +
 349 //                                                  "parser");
 350 //                                                break LINES;
 351 //                                            }
 352                                 }
 353                                 else {
 354                                     m = reTransactionDetails.matcher(line);
 355                                     if (m.find()) {
 356                                         String acc_name = m.group(1);
 357                                         String amount = m.group(2);
 358                                         String currency = m.group(3);
 359                                         if (currency == null) currency = "";
 360                                         amount = amount.replace(',', '.');
 361                                         transaction.addAccount(
 362                                                 new LedgerTransactionAccount(acc_name,
 363                                                         Float.valueOf(amount), currency));
 364                                         L(String.format(Locale.ENGLISH, "%d: %s = %s",
 365                                                 transaction.getId(), acc_name, amount));
 366                                     }
 367                                     else throw new IllegalStateException(String.format(
 368                                             "Can't parse transaction %d " + "details: %s",
 369                                             transactionId, line));
 370                                 }
 371                                 break;
 372                             default:
 373                                 throw new RuntimeException(
 374                                         String.format("Unknown parser updating %s", state.name()));
 375                         }
 376                     }
 377
 378                     throwIfCancelled();
 379
 380                     profile.deleteNotPresentTransactions(db);
 381                     db.setTransactionSuccessful();
 382
 383                     profile.setLastUpdateStamp();
 384
 385                     return null;
 386                 }
 387                 finally {
 388                     db.endTransaction();
 389                 }
 390             }
 391         }
 392     }
 393     private void prepareDbForRetrieval(SQLiteDatabase db, MobileLedgerProfile profile) {
 394         db.execSQL("UPDATE transactions set keep=0 where profile=?",
 395                 new String[]{profile.getUuid()});
 396         db.execSQL("update account_values set keep=0 where profile=?;",
 397                 new String[]{profile.getUuid()});
 398         db.execSQL("update accounts set keep=0 where profile=?;", new String[]{profile.getUuid()});
 399     }
 400     private boolean retrieveAccountList()
 401             throws IOException, HTTPException {
 402         Progress progress = new Progress();
 403
 404         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "accounts");
 405         http.setAllowUserInteraction(false);
 406         switch (http.getResponseCode()) {
 407             case 200:
 408                 break;
 409             case 404:
 410                 return false;
 411             default:
 412                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 413         }
 414         publishProgress(progress);
 415         SQLiteDatabase db = MLDB.getDatabase();
 416         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 417         boolean listFilledOK = false;
 418         try (InputStream resp = http.getInputStream()) {
 419             if (http.getResponseCode() != 200)
 420                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 421
 422             db.beginTransaction();
 423             try {
 424                 profile.markAccountsAsNotPresent(db);
 425
 426                 AccountListParser parser = new AccountListParser(resp);
 427
 428                 LedgerAccount prevAccount = null;
 429
 430                 while (true) {
 431                     throwIfCancelled();
 432                     ParsedLedgerAccount parsedAccount = parser.nextAccount();
 433                     if (parsedAccount == null) break;
 434
 435                     LedgerAccount acc = profile.tryLoadAccount(db, parsedAccount.getAname());
 436                     if (acc == null) acc = new LedgerAccount(parsedAccount.getAname());
 437                     else acc.removeAmounts();
 438
 439                     profile.storeAccount(db, acc);
 440                     String lastCurrency = null;
 441                     float lastCurrencyAmount = 0;
 442                     for (ParsedBalance b : parsedAccount.getAibalance()) {
 443                         final String currency = b.getAcommodity();
 444                         final float amount = b.getAquantity().asFloat();
 445                         if (currency.equals(lastCurrency)) lastCurrencyAmount += amount;
 446                         else {
 447                             if (lastCurrency != null) {
 448                                 profile.storeAccountValue(db, acc.getName(), lastCurrency,
 449                                         lastCurrencyAmount);
 450                                 acc.addAmount(lastCurrencyAmount, lastCurrency);
 451                             }
 452                             lastCurrency = currency;
 453                             lastCurrencyAmount = amount;
 454                         }
 455                     }
 456                     if (lastCurrency != null) {
 457                         profile.storeAccountValue(db, acc.getName(), lastCurrency,
 458                                 lastCurrencyAmount);
 459                         acc.addAmount(lastCurrencyAmount, lastCurrency);
 460                     }
 461
 462                     if (acc.isVisible(accountList)) accountList.add(acc);
 463
 464                     if (prevAccount != null) {
 465                         prevAccount.setHasSubAccounts(
 466                                 acc.getName().startsWith(prevAccount.getName() + ":"));
 467                     }
 468
 469                     prevAccount = acc;
 470                 }
 471                 throwIfCancelled();
 472
 473                 profile.deleteNotPresentAccounts(db);
 474                 throwIfCancelled();
 475                 db.setTransactionSuccessful();
 476                 listFilledOK = true;
 477             }
 478             finally {
 479                 db.endTransaction();
 480             }
 481         }
 482         // should not be set in the DB transaction, because of a possible deadlock
 483         // with the main and DbOpQueueRunner threads
 484         if (listFilledOK) Data.accounts.setList(accountList);
 485
 486         return true;
 487     }
 488     private boolean retrieveTransactionList()
 489             throws IOException, ParseException, HTTPException {
 490         Progress progress = new Progress();
 491         int maxTransactionId = Progress.INDETERMINATE;
 492
 493         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "transactions");
 494         http.setAllowUserInteraction(false);
 495         publishProgress(progress);
 496         switch (http.getResponseCode()) {
 497             case 200:
 498                 break;
 499             case 404:
 500                 return false;
 501             default:
 502                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 503         }
 504         SQLiteDatabase db = MLDB.getDatabase();
 505         try (InputStream resp = http.getInputStream()) {
 506             if (http.getResponseCode() != 200)
 507                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 508             throwIfCancelled();
 509             db.beginTransaction();
 510             try {
 511                 profile.markTransactionsAsNotPresent(db);
 512
 513                 int matchedTransactionsCount = 0;
 514                 TransactionListParser parser = new TransactionListParser(resp);
 515
 516                 int processedTransactionCount = 0;
 517
 518                 DetectedTransactionOrder transactionOrder = DetectedTransactionOrder.UNKNOWN;
 519                 int orderAccumulator = 0;
 520                 int lastTransactionId = 0;
 521
 522                 while (true) {
 523                     throwIfCancelled();
 524                     ParsedLedgerTransaction parsedTransaction = parser.nextTransaction();
 525                     throwIfCancelled();
 526                     if (parsedTransaction == null) break;
 527
 528                     LedgerTransaction transaction = parsedTransaction.asLedgerTransaction();
 529                     if (transaction.getId() > lastTransactionId) orderAccumulator++;
 530                     else orderAccumulator--;
 531                     lastTransactionId = transaction.getId();
 532                     if (transactionOrder == DetectedTransactionOrder.UNKNOWN) {
 533                         if (orderAccumulator > 30) {
 534                             transactionOrder = DetectedTransactionOrder.FILE;
 535                             debug("rtt", String.format(Locale.ENGLISH,
 536                                     "Detected native file order after %d transactions (factor %d)",
 537                                     processedTransactionCount, orderAccumulator));
 538                             progress.setTotal(Data.transactions.size());
 539                         }
 540                         else if (orderAccumulator < -30) {
 541                             transactionOrder = DetectedTransactionOrder.REVERSE_CHRONOLOGICAL;
 542                             debug("rtt", String.format(Locale.ENGLISH,
 543                                     "Detected reverse chronological order after %d transactions (factor %d)",
 544                                     processedTransactionCount, orderAccumulator));
 545                         }
 546                     }
 547
 548                     if (transaction.existsInDb(db)) {
 549                         profile.markTransactionAsPresent(db, transaction);
 550                         matchedTransactionsCount++;
 551
 552                         if ((transactionOrder == DetectedTransactionOrder.REVERSE_CHRONOLOGICAL) &&
 553                             (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT))
 554                         {
 555                             profile.markTransactionsBeforeTransactionAsPresent(db, transaction);
 556                             progress.setTotal(progress.getProgress());
 557                             publishProgress(progress);
 558                             db.setTransactionSuccessful();
 559                             profile.setLastUpdateStamp();
 560                             return true;
 561                         }
 562                     }
 563                     else {
 564                         profile.storeTransaction(db, transaction);
 565                         matchedTransactionsCount = 0;
 566                         progress.setTotal(maxTransactionId);
 567                     }
 568
 569
 570                     if ((transactionOrder != DetectedTransactionOrder.UNKNOWN) &&
 571                         ((progress.getTotal() == Progress.INDETERMINATE) ||
 572                          (progress.getTotal() < transaction.getId())))
 573                         progress.setTotal(transaction.getId());
 574
 575                     progress.setProgress(++processedTransactionCount);
 576                     publishProgress(progress);
 577                 }
 578
 579                 throwIfCancelled();
 580                 profile.deleteNotPresentTransactions(db);
 581                 throwIfCancelled();
 582                 db.setTransactionSuccessful();
 583                 profile.setLastUpdateStamp();
 584             }
 585             finally {
 586                 db.endTransaction();
 587             }
 588         }
 589
 590         return true;
 591     }
 592
 593     @SuppressLint("DefaultLocale")
 594     @Override
 595     protected String doInBackground(Void... params) {
 596         Data.backgroundTaskStarted();
 597         try {
 598             if (!retrieveAccountList() || !retrieveTransactionList())
 599                 return retrieveTransactionListLegacy();
 600             return null;
 601         }
 602         catch (MalformedURLException e) {
 603             e.printStackTrace();
 604             return "Invalid server URL";
 605         }
 606         catch (HTTPException e) {
 607             e.printStackTrace();
 608             return String.format("HTTP error %d: %s", e.getResponseCode(), e.getResponseMessage());
 609         }
 610         catch (IOException e) {
 611             e.printStackTrace();
 612             return e.getLocalizedMessage();
 613         }
 614         catch (ParseException e) {
 615             e.printStackTrace();
 616             return "Network error";
 617         }
 618         catch (OperationCanceledException e) {
 619             e.printStackTrace();
 620             return "Operation cancelled";
 621         }
 622         finally {
 623             Data.backgroundTaskFinished();
 624         }
 625     }
 626     private MainActivity getContext() {
 627         return contextRef.get();
 628     }
 629     private void throwIfCancelled() {
 630         if (isCancelled()) throw new OperationCanceledException(null);
 631     }
 632     enum DetectedTransactionOrder {UNKNOWN, REVERSE_CHRONOLOGICAL, FILE}
 633
 634     private enum ParserState {
 635         EXPECTING_ACCOUNT, EXPECTING_ACCOUNT_AMOUNT, EXPECTING_JOURNAL, EXPECTING_TRANSACTION,
 636         EXPECTING_TRANSACTION_DESCRIPTION, EXPECTING_TRANSACTION_DETAILS
 637     }
 638
 639     public class Progress {
 640         public static final int INDETERMINATE = -1;
 641         private int progress;
 642         private int total;
 643         Progress() {
 644             this(INDETERMINATE, INDETERMINATE);
 645         }
 646         Progress(int progress, int total) {
 647             this.progress = progress;
 648             this.total = total;
 649         }
 650         public int getProgress() {
 651             return progress;
 652         }
 653         protected void setProgress(int progress) {
 654             this.progress = progress;
 655         }
 656         public int getTotal() {
 657             return total;
 658         }
 659         protected void setTotal(int total) {
 660             this.total = total;
 661         }
 662     }
 663
 664     private class TransactionParserException extends IllegalStateException {
 665         TransactionParserException(String message) {
 666             super(message);
 667         }
 668     }
 669 }