app/src/main/java/net/ktnx/mobileledger/async/RetrieveTransactionsTask.java

   1 /*
   2  * Copyright © 2020 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(
  67             "<tr class=\"title\" " + "id=\"transaction-(\\d+)" + "\"><td class=\"date" +
  68             "\"[^\"]*>([\\d.-]+)</td>");
  69     private static final Pattern reTransactionDescription =
  70             Pattern.compile("<tr class=\"posting\" title=\"(\\S+)\\s(.+)");
  71     private static final Pattern reTransactionDetails = Pattern.compile(
  72             "^\\s+" + "([!*]\\s+)?" + "(\\S[\\S\\s]+\\S)\\s\\s+" + "(?:([^\\d\\s+\\-]+)\\s*)?" +
  73             "([-+]?\\d[\\d,.]*)" + "(?:\\s*([^\\d\\s+\\-]+)\\s*$)?");
  74     private static final Pattern reEnd = Pattern.compile("\\bid=\"addmodal\"");
  75     private static final Pattern reDecimalPoint = Pattern.compile("\\.\\d\\d?$");
  76     private static final Pattern reDecimalComma = Pattern.compile(",\\d\\d?$");
  77     private WeakReference<MainActivity> contextRef;
  78     // %3A is '='
  79     private Pattern reAccountName = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  80     private Pattern reAccountValue = Pattern.compile(
  81             "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  82     private MobileLedgerProfile profile;
  83     public RetrieveTransactionsTask(WeakReference<MainActivity> contextRef,
  84                                     @NonNull MobileLedgerProfile profile) {
  85         this.contextRef = contextRef;
  86         this.profile = profile;
  87     }
  88     private static void L(String msg) {
  89         //debug("transaction-parser", msg);
  90     }
  91     static LedgerTransactionAccount parseTransactionAccountLine(String line) {
  92         Matcher m = reTransactionDetails.matcher(line);
  93         if (m.find()) {
  94             String postingStatus = m.group(1);
  95             String acc_name = m.group(2);
  96             String currencyPre = m.group(3);
  97             String amount = m.group(4);
  98             String currencyPost = m.group(5);
  99
 100             String currency = null;
 101             if ((currencyPre != null) && (currencyPre.length() > 0)) {
 102                 if ((currencyPost != null) && (currencyPost.length() > 0))
 103                     return null;
 104                 currency = currencyPre;
 105             }
 106             else if ((currencyPost != null) && (currencyPost.length() > 0)) {
 107                 currency = currencyPost;
 108             }
 109
 110             amount = amount.replace(',', '.');
 111
 112             return new LedgerTransactionAccount(acc_name, Float.valueOf(amount), currency, null);
 113         }
 114         else {
 115             return null;
 116         }
 117     }
 118     @Override
 119     protected void onProgressUpdate(Progress... values) {
 120         super.onProgressUpdate(values);
 121         MainActivity context = getContext();
 122         if (context == null)
 123             return;
 124         context.onRetrieveProgress(values[0]);
 125     }
 126     @Override
 127     protected void onPreExecute() {
 128         super.onPreExecute();
 129         MainActivity context = getContext();
 130         if (context == null)
 131             return;
 132         context.onRetrieveStart();
 133     }
 134     @Override
 135     protected void onPostExecute(String error) {
 136         super.onPostExecute(error);
 137         MainActivity context = getContext();
 138         if (context == null)
 139             return;
 140         context.onRetrieveDone(error);
 141     }
 142     @Override
 143     protected void onCancelled() {
 144         super.onCancelled();
 145         MainActivity context = getContext();
 146         if (context == null)
 147             return;
 148         context.onRetrieveDone(null);
 149     }
 150     private String retrieveTransactionListLegacy()
 151             throws IOException, ParseException, HTTPException {
 152         Progress progress = new Progress();
 153         int maxTransactionId = Progress.INDETERMINATE;
 154         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 155         HashMap<String, Void> accountNames = new HashMap<>();
 156         HashMap<String, LedgerAccount> syntheticAccounts = new HashMap<>();
 157         LedgerAccount lastAccount = null, prevAccount = null;
 158
 159         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "journal");
 160         http.setAllowUserInteraction(false);
 161         publishProgress(progress);
 162         switch (http.getResponseCode()) {
 163             case 200:
 164                 break;
 165             default:
 166                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 167         }
 168
 169         SQLiteDatabase db = App.getDatabase();
 170         try (InputStream resp = http.getInputStream()) {
 171             if (http.getResponseCode() != 200)
 172                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 173             db.beginTransaction();
 174             try {
 175                 prepareDbForRetrieval(db, profile);
 176
 177                 int matchedTransactionsCount = 0;
 178
 179
 180                 ParserState state = ParserState.EXPECTING_ACCOUNT;
 181                 String line;
 182                 BufferedReader buf =
 183                         new BufferedReader(new InputStreamReader(resp, StandardCharsets.UTF_8));
 184
 185                 int processedTransactionCount = 0;
 186                 int transactionId = 0;
 187                 LedgerTransaction transaction = null;
 188                 LINES:
 189                 while ((line = buf.readLine()) != null) {
 190                     throwIfCancelled();
 191                     Matcher m;
 192                     m = reComment.matcher(line);
 193                     if (m.find()) {
 194                         // TODO: comments are ignored for now
 195 //                            Log.v("transaction-parser", "Ignoring comment");
 196                         continue;
 197                     }
 198                     //L(String.format("State is %d", updating));
 199                     switch (state) {
 200                         case EXPECTING_ACCOUNT:
 201                             if (line.equals("<h2>General Journal</h2>")) {
 202                                 state = ParserState.EXPECTING_TRANSACTION;
 203                                 L("→ expecting transaction");
 204                                 // commit the current transaction and start a new one
 205                                 // the account list in the UI should reflect the (committed)
 206                                 // state of the database
 207                                 db.setTransactionSuccessful();
 208                                 db.endTransaction();
 209                                 Data.accounts.setList(accountList);
 210                                 db.beginTransaction();
 211                                 continue;
 212                             }
 213                             m = reAccountName.matcher(line);
 214                             if (m.find()) {
 215                                 String acct_encoded = m.group(1);
 216                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
 217                                 acct_name = acct_name.replace("\"", "");
 218                                 L(String.format("found account: %s", acct_name));
 219
 220                                 prevAccount = lastAccount;
 221                                 lastAccount = profile.tryLoadAccount(db, acct_name);
 222                                 if (lastAccount == null)
 223                                     lastAccount = new LedgerAccount(profile, acct_name);
 224                                 else
 225                                     lastAccount.removeAmounts();
 226                                 profile.storeAccount(db, lastAccount);
 227
 228                                 if (prevAccount != null)
 229                                     prevAccount.setHasSubAccounts(
 230                                             prevAccount.isParentOf(lastAccount));
 231                                 // make sure the parent account(s) are present,
 232                                 // synthesising them if necessary
 233                                 // this happens when the (missing-in-HTML) parent account has
 234                                 // only one child so we create a synthetic parent account record,
 235                                 // copying the amounts when child's amounts are parsed
 236                                 String parentName = lastAccount.getParentName();
 237                                 if (parentName != null) {
 238                                     Stack<String> toAppend = new Stack<>();
 239                                     while (parentName != null) {
 240                                         if (accountNames.containsKey(parentName))
 241                                             break;
 242                                         toAppend.push(parentName);
 243                                         parentName = new LedgerAccount(profile, parentName).getParentName();
 244                                     }
 245                                     syntheticAccounts.clear();
 246                                     while (!toAppend.isEmpty()) {
 247                                         String aName = toAppend.pop();
 248                                         LedgerAccount acc = profile.tryLoadAccount(db, aName);
 249                                         if (acc == null) {
 250                                             acc = new LedgerAccount(profile, aName);
 251                                             acc.setExpanded(!lastAccount.hasSubAccounts() ||
 252                                                             lastAccount.isExpanded());
 253                                         }
 254                                         acc.setHasSubAccounts(true);
 255                                         acc.removeAmounts();    // filled below when amounts are
 256                                         // parsed
 257                                         if (acc.isVisible(accountList))
 258                                             accountList.add(acc);
 259                                         L(String.format("gap-filling with %s", aName));
 260                                         accountNames.put(aName, null);
 261                                         profile.storeAccount(db, acc);
 262                                         syntheticAccounts.put(aName, acc);
 263                                     }
 264                                 }
 265
 266                                 if (lastAccount.isVisible(accountList))
 267                                     accountList.add(lastAccount);
 268                                 accountNames.put(acct_name, null);
 269
 270                                 state = ParserState.EXPECTING_ACCOUNT_AMOUNT;
 271                                 L("→ expecting account amount");
 272                             }
 273                             break;
 274
 275                         case EXPECTING_ACCOUNT_AMOUNT:
 276                             m = reAccountValue.matcher(line);
 277                             boolean match_found = false;
 278                             while (m.find()) {
 279                                 throwIfCancelled();
 280
 281                                 match_found = true;
 282                                 String value = m.group(1);
 283                                 String currency = m.group(2);
 284                                 if (currency == null)
 285                                     currency = "";
 286
 287                                 {
 288                                     Matcher tmpM = reDecimalComma.matcher(value);
 289                                     if (tmpM.find()) {
 290                                         value = value.replace(".", "");
 291                                         value = value.replace(',', '.');
 292                                     }
 293
 294                                     tmpM = reDecimalPoint.matcher(value);
 295                                     if (tmpM.find()) {
 296                                         value = value.replace(",", "");
 297                                         value = value.replace(" ", "");
 298                                     }
 299                                 }
 300                                 L("curr=" + currency + ", value=" + value);
 301                                 final float val = Float.parseFloat(value);
 302                                 profile.storeAccountValue(db, lastAccount.getName(), currency, val);
 303                                 lastAccount.addAmount(val, currency);
 304                                 for (LedgerAccount syn : syntheticAccounts.values()) {
 305                                     L(String.format(Locale.ENGLISH, "propagating %s %1.2f to %s",
 306                                             currency, val, syn.getName()));
 307                                     syn.addAmount(val, currency);
 308                                     profile.storeAccountValue(db, syn.getName(), currency, val);
 309                                 }
 310                             }
 311
 312                             if (match_found) {
 313                                 syntheticAccounts.clear();
 314                                 state = ParserState.EXPECTING_ACCOUNT;
 315                                 L("→ expecting account");
 316                             }
 317
 318                             break;
 319
 320                         case EXPECTING_TRANSACTION:
 321                             if (!line.isEmpty() && (line.charAt(0) == ' '))
 322                                 continue;
 323                             m = reTransactionStart.matcher(line);
 324                             if (m.find()) {
 325                                 transactionId = Integer.valueOf(m.group(1));
 326                                 state = ParserState.EXPECTING_TRANSACTION_DESCRIPTION;
 327                                 L(String.format(Locale.ENGLISH,
 328                                         "found transaction %d → expecting description",
 329                                         transactionId));
 330                                 progress.setProgress(++processedTransactionCount);
 331                                 if (maxTransactionId < transactionId)
 332                                     maxTransactionId = transactionId;
 333                                 if ((progress.getTotal() == Progress.INDETERMINATE) ||
 334                                     (progress.getTotal() < transactionId))
 335                                     progress.setTotal(transactionId);
 336                                 publishProgress(progress);
 337                             }
 338                             m = reEnd.matcher(line);
 339                             if (m.find()) {
 340                                 L("--- transaction value complete ---");
 341                                 break LINES;
 342                             }
 343                             break;
 344
 345                         case EXPECTING_TRANSACTION_DESCRIPTION:
 346                             if (!line.isEmpty() && (line.charAt(0) == ' '))
 347                                 continue;
 348                             m = reTransactionDescription.matcher(line);
 349                             if (m.find()) {
 350                                 if (transactionId == 0)
 351                                     throw new TransactionParserException(
 352                                             "Transaction Id is 0 while expecting " + "description");
 353
 354                                 String date = m.group(1);
 355                                 try {
 356                                     int equalsIndex = date.indexOf('=');
 357                                     if (equalsIndex >= 0)
 358                                         date = date.substring(equalsIndex + 1);
 359                                     transaction =
 360                                             new LedgerTransaction(transactionId, date, m.group(2));
 361                                 }
 362                                 catch (ParseException e) {
 363                                     e.printStackTrace();
 364                                     return String.format("Error parsing date '%s'", date);
 365                                 }
 366                                 state = ParserState.EXPECTING_TRANSACTION_DETAILS;
 367                                 L(String.format(Locale.ENGLISH,
 368                                         "transaction %d created for %s (%s) →" +
 369                                         " expecting details", transactionId, date, m.group(2)));
 370                             }
 371                             break;
 372
 373                         case EXPECTING_TRANSACTION_DETAILS:
 374                             if (line.isEmpty()) {
 375                                 // transaction data collected
 376                                 if (transaction.existsInDb(db)) {
 377                                     profile.markTransactionAsPresent(db, transaction);
 378                                     matchedTransactionsCount++;
 379
 380                                     if (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT) {
 381                                         profile.markTransactionsBeforeTransactionAsPresent(db,
 382                                                 transaction);
 383                                         progress.setTotal(progress.getProgress());
 384                                         publishProgress(progress);
 385                                         break LINES;
 386                                     }
 387                                 }
 388                                 else {
 389                                     profile.storeTransaction(db, transaction);
 390                                     matchedTransactionsCount = 0;
 391                                     progress.setTotal(maxTransactionId);
 392                                 }
 393
 394                                 state = ParserState.EXPECTING_TRANSACTION;
 395                                 L(String.format("transaction %s saved → expecting transaction",
 396                                         transaction.getId()));
 397                                 transaction.finishLoading();
 398
 399 // sounds like a good idea, but transaction-1 may not be the first one chronologically
 400 // for example, when you add the initial seeding transaction after entering some others
 401 //                                            if (transactionId == 1) {
 402 //                                                L("This was the initial transaction.
 403 //                                                Terminating " +
 404 //                                                  "parser");
 405 //                                                break LINES;
 406 //                                            }
 407                             }
 408                             else {
 409                                 LedgerTransactionAccount lta = parseTransactionAccountLine(line);
 410                                 if (lta != null) {
 411                                     transaction.addAccount(lta);
 412                                     L(String.format(Locale.ENGLISH, "%d: %s = %s",
 413                                             transaction.getId(), lta.getAccountName(),
 414                                             lta.getAmount()));
 415                                 }
 416                                 else
 417                                     throw new IllegalStateException(
 418                                             String.format("Can't parse transaction %d details: %s",
 419                                                     transactionId, line));
 420                             }
 421                             break;
 422                         default:
 423                             throw new RuntimeException(
 424                                     String.format("Unknown parser updating %s", state.name()));
 425                     }
 426                 }
 427
 428                 throwIfCancelled();
 429
 430                 profile.deleteNotPresentTransactions(db);
 431                 db.setTransactionSuccessful();
 432
 433                 profile.setLastUpdateStamp();
 434
 435                 return null;
 436             }
 437             finally {
 438                 db.endTransaction();
 439             }
 440         }
 441     }
 442     private void prepareDbForRetrieval(SQLiteDatabase db, MobileLedgerProfile profile) {
 443         db.execSQL("UPDATE transactions set keep=0 where profile=?",
 444                 new String[]{profile.getUuid()});
 445         db.execSQL("update account_values set keep=0 where profile=?;",
 446                 new String[]{profile.getUuid()});
 447         db.execSQL("update accounts set keep=0 where profile=?;", new String[]{profile.getUuid()});
 448     }
 449     private boolean retrieveAccountList() throws IOException, HTTPException {
 450         Progress progress = new Progress();
 451
 452         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "accounts");
 453         http.setAllowUserInteraction(false);
 454         switch (http.getResponseCode()) {
 455             case 200:
 456                 break;
 457             case 404:
 458                 return false;
 459             default:
 460                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 461         }
 462         publishProgress(progress);
 463         SQLiteDatabase db = App.getDatabase();
 464         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 465         boolean listFilledOK = false;
 466         try (InputStream resp = http.getInputStream()) {
 467             if (http.getResponseCode() != 200)
 468                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 469
 470             db.beginTransaction();
 471             try {
 472                 profile.markAccountsAsNotPresent(db);
 473
 474                 AccountListParser parser = new AccountListParser(resp);
 475
 476                 LedgerAccount prevAccount = null;
 477
 478                 while (true) {
 479                     throwIfCancelled();
 480                     ParsedLedgerAccount parsedAccount = parser.nextAccount();
 481                     if (parsedAccount == null)
 482                         break;
 483
 484                     LedgerAccount acc = profile.tryLoadAccount(db, parsedAccount.getAname());
 485                     if (acc == null)
 486                         acc = new LedgerAccount(profile, parsedAccount.getAname());
 487                     else
 488                         acc.removeAmounts();
 489
 490                     profile.storeAccount(db, acc);
 491                     String lastCurrency = null;
 492                     float lastCurrencyAmount = 0;
 493                     for (ParsedBalance b : parsedAccount.getAibalance()) {
 494                         final String currency = b.getAcommodity();
 495                         final float amount = b.getAquantity()
 496                                               .asFloat();
 497                         if (currency.equals(lastCurrency))
 498                             lastCurrencyAmount += amount;
 499                         else {
 500                             if (lastCurrency != null) {
 501                                 profile.storeAccountValue(db, acc.getName(), lastCurrency,
 502                                         lastCurrencyAmount);
 503                                 acc.addAmount(lastCurrencyAmount, lastCurrency);
 504                             }
 505                             lastCurrency = currency;
 506                             lastCurrencyAmount = amount;
 507                         }
 508                     }
 509                     if (lastCurrency != null) {
 510                         profile.storeAccountValue(db, acc.getName(), lastCurrency,
 511                                 lastCurrencyAmount);
 512                         acc.addAmount(lastCurrencyAmount, lastCurrency);
 513                     }
 514
 515                     if (acc.isVisible(accountList))
 516                         accountList.add(acc);
 517
 518                     if (prevAccount != null) {
 519                         prevAccount.setHasSubAccounts(acc.getName()
 520                                                          .startsWith(prevAccount.getName() + ":"));
 521                     }
 522
 523                     prevAccount = acc;
 524                 }
 525                 throwIfCancelled();
 526
 527                 profile.deleteNotPresentAccounts(db);
 528                 throwIfCancelled();
 529                 db.setTransactionSuccessful();
 530                 listFilledOK = true;
 531             }
 532             finally {
 533                 db.endTransaction();
 534             }
 535         }
 536         // should not be set in the DB transaction, because of a possible deadlock
 537         // with the main and DbOpQueueRunner threads
 538         if (listFilledOK)
 539             Data.accounts.setList(accountList);
 540
 541         return true;
 542     }
 543     private boolean retrieveTransactionList() throws IOException, ParseException, HTTPException {
 544         Progress progress = new Progress();
 545         int maxTransactionId = Progress.INDETERMINATE;
 546
 547         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "transactions");
 548         http.setAllowUserInteraction(false);
 549         publishProgress(progress);
 550         switch (http.getResponseCode()) {
 551             case 200:
 552                 break;
 553             case 404:
 554                 return false;
 555             default:
 556                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 557         }
 558         SQLiteDatabase db = App.getDatabase();
 559         try (InputStream resp = http.getInputStream()) {
 560             if (http.getResponseCode() != 200)
 561                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 562             throwIfCancelled();
 563             db.beginTransaction();
 564             try {
 565                 profile.markTransactionsAsNotPresent(db);
 566
 567                 int matchedTransactionsCount = 0;
 568                 TransactionListParser parser = new TransactionListParser(resp);
 569
 570                 int processedTransactionCount = 0;
 571
 572                 DetectedTransactionOrder transactionOrder = DetectedTransactionOrder.UNKNOWN;
 573                 int orderAccumulator = 0;
 574                 int lastTransactionId = 0;
 575
 576                 while (true) {
 577                     throwIfCancelled();
 578                     ParsedLedgerTransaction parsedTransaction = parser.nextTransaction();
 579                     throwIfCancelled();
 580                     if (parsedTransaction == null)
 581                         break;
 582
 583                     LedgerTransaction transaction = parsedTransaction.asLedgerTransaction();
 584                     if (transaction.getId() > lastTransactionId)
 585                         orderAccumulator++;
 586                     else
 587                         orderAccumulator--;
 588                     lastTransactionId = transaction.getId();
 589                     if (transactionOrder == DetectedTransactionOrder.UNKNOWN) {
 590                         if (orderAccumulator > 30) {
 591                             transactionOrder = DetectedTransactionOrder.FILE;
 592                             debug("rtt", String.format(Locale.ENGLISH,
 593                                     "Detected native file order after %d transactions (factor %d)",
 594                                     processedTransactionCount, orderAccumulator));
 595                             progress.setTotal(Data.transactions.size());
 596                         }
 597                         else if (orderAccumulator < -30) {
 598                             transactionOrder = DetectedTransactionOrder.REVERSE_CHRONOLOGICAL;
 599                             debug("rtt", String.format(Locale.ENGLISH,
 600                                     "Detected reverse chronological order after %d transactions " +
 601                                     "(factor %d)", processedTransactionCount, orderAccumulator));
 602                         }
 603                     }
 604
 605                     if (transaction.existsInDb(db)) {
 606                         profile.markTransactionAsPresent(db, transaction);
 607                         matchedTransactionsCount++;
 608
 609                         if ((transactionOrder == DetectedTransactionOrder.REVERSE_CHRONOLOGICAL) &&
 610                             (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT))
 611                         {
 612                             profile.markTransactionsBeforeTransactionAsPresent(db, transaction);
 613                             progress.setTotal(progress.getProgress());
 614                             publishProgress(progress);
 615                             db.setTransactionSuccessful();
 616                             profile.setLastUpdateStamp();
 617                             return true;
 618                         }
 619                     }
 620                     else {
 621                         profile.storeTransaction(db, transaction);
 622                         matchedTransactionsCount = 0;
 623                         progress.setTotal(maxTransactionId);
 624                     }
 625
 626
 627                     if ((transactionOrder != DetectedTransactionOrder.UNKNOWN) &&
 628                         ((progress.getTotal() == Progress.INDETERMINATE) ||
 629                          (progress.getTotal() < transaction.getId())))
 630                         progress.setTotal(transaction.getId());
 631
 632                     progress.setProgress(++processedTransactionCount);
 633                     publishProgress(progress);
 634                 }
 635
 636                 throwIfCancelled();
 637                 profile.deleteNotPresentTransactions(db);
 638                 throwIfCancelled();
 639                 db.setTransactionSuccessful();
 640                 profile.setLastUpdateStamp();
 641             }
 642             finally {
 643                 db.endTransaction();
 644             }
 645         }
 646
 647         return true;
 648     }
 649
 650     @SuppressLint("DefaultLocale")
 651     @Override
 652     protected String doInBackground(Void... params) {
 653         Data.backgroundTaskStarted();
 654         try {
 655             if (!retrieveAccountList() || !retrieveTransactionList())
 656                 return retrieveTransactionListLegacy();
 657             return null;
 658         }
 659         catch (MalformedURLException e) {
 660             e.printStackTrace();
 661             return "Invalid server URL";
 662         }
 663         catch (HTTPException e) {
 664             e.printStackTrace();
 665             return String.format("HTTP error %d: %s", e.getResponseCode(), e.getResponseMessage());
 666         }
 667         catch (IOException e) {
 668             e.printStackTrace();
 669             return e.getLocalizedMessage();
 670         }
 671         catch (ParseException e) {
 672             e.printStackTrace();
 673             return "Network error";
 674         }
 675         catch (OperationCanceledException e) {
 676             e.printStackTrace();
 677             return "Operation cancelled";
 678         }
 679         finally {
 680             Data.backgroundTaskFinished();
 681         }
 682     }
 683     private MainActivity getContext() {
 684         return contextRef.get();
 685     }
 686     private void throwIfCancelled() {
 687         if (isCancelled())
 688             throw new OperationCanceledException(null);
 689     }
 690     enum DetectedTransactionOrder {UNKNOWN, REVERSE_CHRONOLOGICAL, FILE}
 691
 692     private enum ParserState {
 693         EXPECTING_ACCOUNT, EXPECTING_ACCOUNT_AMOUNT, EXPECTING_JOURNAL, EXPECTING_TRANSACTION,
 694         EXPECTING_TRANSACTION_DESCRIPTION, EXPECTING_TRANSACTION_DETAILS
 695     }
 696
 697     public class Progress {
 698         public static final int INDETERMINATE = -1;
 699         private int progress;
 700         private int total;
 701         Progress() {
 702             this(INDETERMINATE, INDETERMINATE);
 703         }
 704         Progress(int progress, int total) {
 705             this.progress = progress;
 706             this.total = total;
 707         }
 708         public int getProgress() {
 709             return progress;
 710         }
 711         protected void setProgress(int progress) {
 712             this.progress = progress;
 713         }
 714         public int getTotal() {
 715             return total;
 716         }
 717         protected void setTotal(int total) {
 718             this.total = total;
 719         }
 720     }
 721
 722     private class TransactionParserException extends IllegalStateException {
 723         TransactionParserException(String message) {
 724             super(message);
 725         }
 726     }
 727 }