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

   1 /*
   2  * Copyright © 2019 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.async;
  19
  20 import android.annotation.SuppressLint;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.os.AsyncTask;
  23 import android.os.OperationCanceledException;
  24
  25 import androidx.annotation.NonNull;
  26
  27 import net.ktnx.mobileledger.App;
  28 import net.ktnx.mobileledger.err.HTTPException;
  29 import net.ktnx.mobileledger.json.AccountListParser;
  30 import net.ktnx.mobileledger.json.ParsedBalance;
  31 import net.ktnx.mobileledger.json.ParsedLedgerAccount;
  32 import net.ktnx.mobileledger.json.ParsedLedgerTransaction;
  33 import net.ktnx.mobileledger.json.TransactionListParser;
  34 import net.ktnx.mobileledger.model.Data;
  35 import net.ktnx.mobileledger.model.LedgerAccount;
  36 import net.ktnx.mobileledger.model.LedgerTransaction;
  37 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  38 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  39 import net.ktnx.mobileledger.ui.activity.MainActivity;
  40 import net.ktnx.mobileledger.utils.NetworkUtil;
  41
  42 import java.io.BufferedReader;
  43 import java.io.IOException;
  44 import java.io.InputStream;
  45 import java.io.InputStreamReader;
  46 import java.lang.ref.WeakReference;
  47 import java.net.HttpURLConnection;
  48 import java.net.MalformedURLException;
  49 import java.net.URLDecoder;
  50 import java.nio.charset.StandardCharsets;
  51 import java.text.ParseException;
  52 import java.util.ArrayList;
  53 import java.util.HashMap;
  54 import java.util.Locale;
  55 import java.util.Stack;
  56 import java.util.regex.Matcher;
  57 import java.util.regex.Pattern;
  58
  59 import static net.ktnx.mobileledger.utils.Logger.debug;
  60
  61
  62 public class RetrieveTransactionsTask
  63         extends AsyncTask<Void, RetrieveTransactionsTask.Progress, String> {
  64     private static final int MATCHING_TRANSACTIONS_LIMIT = 150;
  65     private static final Pattern reComment = Pattern.compile("^\\s*;");
  66     private static final Pattern reTransactionStart = Pattern.compile("<tr class=\"title\" " +
  67                                                                       "id=\"transaction-(\\d+)\"><td class=\"date\"[^\"]*>([\\d.-]+)</td>");
  68     private static final Pattern reTransactionDescription =
  69             Pattern.compile("<tr class=\"posting\" title=\"(\\S+)\\s(.+)");
  70     private static final Pattern reTransactionDetails =
  71             Pattern.compile("^\\s+(\\S[\\S\\s]+\\S)\\s\\s+([-+]?\\d[\\d,.]*)(?:\\s+(\\S+)$)?");
  72     private static final Pattern reEnd = Pattern.compile("\\bid=\"addmodal\"");
  73     private static final Pattern reDecimalPoint = Pattern.compile("\\.\\d\\d?$");
  74     private static final Pattern reDecimalComma = Pattern.compile(",\\d\\d?$");
  75     private WeakReference<MainActivity> contextRef;
  76     // %3A is '='
  77     private Pattern reAccountName = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  78     private Pattern reAccountValue = Pattern.compile(
  79             "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  80     private MobileLedgerProfile profile;
  81     public RetrieveTransactionsTask(WeakReference<MainActivity> contextRef,
  82                                     @NonNull MobileLedgerProfile profile) {
  83         this.contextRef = contextRef;
  84         this.profile = profile;
  85     }
  86     private static void L(String msg) {
  87         //debug("transaction-parser", msg);
  88     }
  89     @Override
  90     protected void onProgressUpdate(Progress... values) {
  91         super.onProgressUpdate(values);
  92         MainActivity context = getContext();
  93         if (context == null) return;
  94         context.onRetrieveProgress(values[0]);
  95     }
  96     @Override
  97     protected void onPreExecute() {
  98         super.onPreExecute();
  99         MainActivity context = getContext();
 100         if (context == null) return;
 101         context.onRetrieveStart();
 102     }
 103     @Override
 104     protected void onPostExecute(String error) {
 105         super.onPostExecute(error);
 106         MainActivity context = getContext();
 107         if (context == null) return;
 108         context.onRetrieveDone(error);
 109     }
 110     @Override
 111     protected void onCancelled() {
 112         super.onCancelled();
 113         MainActivity context = getContext();
 114         if (context == null) return;
 115         context.onRetrieveDone(null);
 116     }
 117     private String retrieveTransactionListLegacy()
 118             throws IOException, ParseException, HTTPException {
 119         Progress progress = new Progress();
 120         int maxTransactionId = Progress.INDETERMINATE;
 121         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 122         HashMap<String, Void> accountNames = new HashMap<>();
 123         HashMap<String, LedgerAccount> syntheticAccounts = new HashMap<>();
 124         LedgerAccount lastAccount = null, prevAccount = null;
 125         boolean onlyStarred = Data.optShowOnlyStarred.get();
 126
 127         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "journal");
 128         http.setAllowUserInteraction(false);
 129         publishProgress(progress);
 130         switch (http.getResponseCode()) {
 131             case 200:
 132                 break;
 133             default:
 134                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 135         }
 136
 137         SQLiteDatabase db = App.getDatabase();
 138         try (InputStream resp = http.getInputStream()) {
 139             if (http.getResponseCode() != 200)
 140                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 141             db.beginTransaction();
 142             try {
 143                 prepareDbForRetrieval(db, profile);
 144
 145                 int matchedTransactionsCount = 0;
 146
 147
 148                 ParserState state = ParserState.EXPECTING_ACCOUNT;
 149                 String line;
 150                 BufferedReader buf =
 151                         new BufferedReader(new InputStreamReader(resp, StandardCharsets.UTF_8));
 152
 153                 int processedTransactionCount = 0;
 154                 int transactionId = 0;
 155                 LedgerTransaction transaction = null;
 156                 LINES:
 157                 while ((line = buf.readLine()) != null) {
 158                     throwIfCancelled();
 159                     Matcher m;
 160                     m = reComment.matcher(line);
 161                     if (m.find()) {
 162                         // TODO: comments are ignored for now
 163 //                            Log.v("transaction-parser", "Ignoring comment");
 164                         continue;
 165                     }
 166                     //L(String.format("State is %d", updating));
 167                     switch (state) {
 168                         case EXPECTING_ACCOUNT:
 169                             if (line.equals("<h2>General Journal</h2>")) {
 170                                 state = ParserState.EXPECTING_TRANSACTION;
 171                                 L("→ expecting transaction");
 172                                 // commit the current transaction and start a new one
 173                                 // the account list in the UI should reflect the (committed)
 174                                 // state of the database
 175                                 db.setTransactionSuccessful();
 176                                 db.endTransaction();
 177                                 Data.accounts.setList(accountList);
 178                                 db.beginTransaction();
 179                                 continue;
 180                             }
 181                             m = reAccountName.matcher(line);
 182                             if (m.find()) {
 183                                 String acct_encoded = m.group(1);
 184                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
 185                                 acct_name = acct_name.replace("\"", "");
 186                                 L(String.format("found account: %s", acct_name));
 187
 188                                 prevAccount = lastAccount;
 189                                 lastAccount = profile.tryLoadAccount(db, acct_name);
 190                                 if (lastAccount == null) lastAccount = new LedgerAccount(acct_name);
 191                                 else lastAccount.removeAmounts();
 192                                 profile.storeAccount(db, lastAccount);
 193
 194                                 if (prevAccount != null) prevAccount
 195                                         .setHasSubAccounts(prevAccount.isParentOf(lastAccount));
 196                                 // make sure the parent account(s) are present,
 197                                 // synthesising them if necessary
 198                                 // this happens when the (missing-in-HTML) parent account has
 199                                 // only one child so we create a synthetic parent account record,
 200                                 // copying the amounts when child's amounts are parsed
 201                                 String parentName = lastAccount.getParentName();
 202                                 if (parentName != null) {
 203                                     Stack<String> toAppend = new Stack<>();
 204                                     while (parentName != null) {
 205                                         if (accountNames.containsKey(parentName)) break;
 206                                         toAppend.push(parentName);
 207                                         parentName = new LedgerAccount(parentName).getParentName();
 208                                     }
 209                                     syntheticAccounts.clear();
 210                                     while (!toAppend.isEmpty()) {
 211                                         String aName = toAppend.pop();
 212                                         LedgerAccount acc = profile.tryLoadAccount(db, aName);
 213                                         if (acc == null) {
 214                                             acc = new LedgerAccount(aName);
 215                                             acc.setHiddenByStar(lastAccount.isHiddenByStar());
 216                                             acc.setExpanded(!lastAccount.hasSubAccounts() ||
 217                                                             lastAccount.isExpanded());
 218                                         }
 219                                         acc.setHasSubAccounts(true);
 220                                         acc.removeAmounts();    // filled below when amounts are parsed
 221                                         if ((!onlyStarred || !acc.isHiddenByStar()) &&
 222                                             acc.isVisible(accountList)) accountList.add(acc);
 223                                         L(String.format("gap-filling with %s", aName));
 224                                         accountNames.put(aName, null);
 225                                         profile.storeAccount(db, acc);
 226                                         syntheticAccounts.put(aName, acc);
 227                                     }
 228                                 }
 229
 230                                 if ((!onlyStarred || !lastAccount.isHiddenByStar()) &&
 231                                     lastAccount.isVisible(accountList))
 232                                     accountList.add(lastAccount);
 233                                 accountNames.put(acct_name, null);
 234
 235                                 state = ParserState.EXPECTING_ACCOUNT_AMOUNT;
 236                                 L("→ expecting account amount");
 237                             }
 238                             break;
 239
 240                         case EXPECTING_ACCOUNT_AMOUNT:
 241                             m = reAccountValue.matcher(line);
 242                             boolean match_found = false;
 243                             while (m.find()) {
 244                                 throwIfCancelled();
 245
 246                                 match_found = true;
 247                                 String value = m.group(1);
 248                                 String currency = m.group(2);
 249                                 if (currency == null) currency = "";
 250
 251                                 {
 252                                     Matcher tmpM = reDecimalComma.matcher(value);
 253                                     if (tmpM.find()) {
 254                                         value = value.replace(".", "");
 255                                         value = value.replace(',', '.');
 256                                     }
 257
 258                                     tmpM = reDecimalPoint.matcher(value);
 259                                     if (tmpM.find()) {
 260                                         value = value.replace(",", "");
 261                                         value = value.replace(" ", "");
 262                                     }
 263                                 }
 264                                 L("curr=" + currency + ", value=" + value);
 265                                 final float val = Float.parseFloat(value);
 266                                 profile.storeAccountValue(db, lastAccount.getName(), currency, val);
 267                                 lastAccount.addAmount(val, currency);
 268                                 for (LedgerAccount syn : syntheticAccounts.values()) {
 269                                     L(String.format(Locale.ENGLISH, "propagating %s %1.2f to %s",
 270                                             currency, val, syn.getName()));
 271                                     syn.addAmount(val, currency);
 272                                     profile.storeAccountValue(db, syn.getName(), currency, val);
 273                                 }
 274                             }
 275
 276                             if (match_found) {
 277                                 syntheticAccounts.clear();
 278                                 state = ParserState.EXPECTING_ACCOUNT;
 279                                 L("→ expecting account");
 280                             }
 281
 282                             break;
 283
 284                         case EXPECTING_TRANSACTION:
 285                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 286                             m = reTransactionStart.matcher(line);
 287                             if (m.find()) {
 288                                 transactionId = Integer.valueOf(m.group(1));
 289                                 state = ParserState.EXPECTING_TRANSACTION_DESCRIPTION;
 290                                 L(String.format(Locale.ENGLISH,
 291                                         "found transaction %d → expecting description",
 292                                         transactionId));
 293                                 progress.setProgress(++processedTransactionCount);
 294                                 if (maxTransactionId < transactionId)
 295                                     maxTransactionId = transactionId;
 296                                 if ((progress.getTotal() == Progress.INDETERMINATE) ||
 297                                     (progress.getTotal() < transactionId))
 298                                     progress.setTotal(transactionId);
 299                                 publishProgress(progress);
 300                             }
 301                             m = reEnd.matcher(line);
 302                             if (m.find()) {
 303                                 L("--- transaction value complete ---");
 304                                 break LINES;
 305                             }
 306                             break;
 307
 308                         case EXPECTING_TRANSACTION_DESCRIPTION:
 309                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 310                             m = reTransactionDescription.matcher(line);
 311                             if (m.find()) {
 312                                 if (transactionId == 0) throw new TransactionParserException(
 313                                         "Transaction Id is 0 while expecting " + "description");
 314
 315                                 String date = m.group(1);
 316                                 try {
 317                                     int equalsIndex = date.indexOf('=');
 318                                     if (equalsIndex >= 0) date = date.substring(equalsIndex + 1);
 319                                     transaction =
 320                                             new LedgerTransaction(transactionId, date, m.group(2));
 321                                 }
 322                                 catch (ParseException e) {
 323                                     e.printStackTrace();
 324                                     return String.format("Error parsing date '%s'", date);
 325                                 }
 326                                 state = ParserState.EXPECTING_TRANSACTION_DETAILS;
 327                                 L(String.format(Locale.ENGLISH,
 328                                         "transaction %d created for %s (%s) →" +
 329                                         " expecting details", transactionId, date, m.group(2)));
 330                             }
 331                             break;
 332
 333                         case EXPECTING_TRANSACTION_DETAILS:
 334                             if (line.isEmpty()) {
 335                                 // transaction data collected
 336                                 if (transaction.existsInDb(db)) {
 337                                     profile.markTransactionAsPresent(db, transaction);
 338                                     matchedTransactionsCount++;
 339
 340                                     if (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT) {
 341                                         profile.markTransactionsBeforeTransactionAsPresent(db,
 342                                                 transaction);
 343                                         progress.setTotal(progress.getProgress());
 344                                         publishProgress(progress);
 345                                         break LINES;
 346                                     }
 347                                 }
 348                                 else {
 349                                     profile.storeTransaction(db, transaction);
 350                                     matchedTransactionsCount = 0;
 351                                     progress.setTotal(maxTransactionId);
 352                                 }
 353
 354                                 state = ParserState.EXPECTING_TRANSACTION;
 355                                 L(String.format("transaction %s saved → expecting transaction",
 356                                         transaction.getId()));
 357                                 transaction.finishLoading();
 358
 359 // sounds like a good idea, but transaction-1 may not be the first one chronologically
 360 // for example, when you add the initial seeding transaction after entering some others
 361 //                                            if (transactionId == 1) {
 362 //                                                L("This was the initial transaction. Terminating " +
 363 //                                                  "parser");
 364 //                                                break LINES;
 365 //                                            }
 366                             }
 367                             else {
 368                                 m = reTransactionDetails.matcher(line);
 369                                 if (m.find()) {
 370                                     String acc_name = m.group(1);
 371                                     String amount = m.group(2);
 372                                     String currency = m.group(3);
 373                                     if (currency == null) currency = "";
 374                                     amount = amount.replace(',', '.');
 375                                     transaction.addAccount(new LedgerTransactionAccount(acc_name,
 376                                             Float.valueOf(amount), currency));
 377                                     L(String.format(Locale.ENGLISH, "%d: %s = %s",
 378                                             transaction.getId(), acc_name, amount));
 379                                 }
 380                                 else throw new IllegalStateException(
 381                                         String.format("Can't parse transaction %d " + "details: %s",
 382                                                 transactionId, line));
 383                             }
 384                             break;
 385                         default:
 386                             throw new RuntimeException(
 387                                     String.format("Unknown parser updating %s", state.name()));
 388                     }
 389                 }
 390
 391                 throwIfCancelled();
 392
 393                 profile.deleteNotPresentTransactions(db);
 394                 db.setTransactionSuccessful();
 395
 396                 profile.setLastUpdateStamp();
 397
 398                 return null;
 399             }
 400             finally {
 401                 db.endTransaction();
 402             }
 403         }
 404     }
 405     private void prepareDbForRetrieval(SQLiteDatabase db, MobileLedgerProfile profile) {
 406         db.execSQL("UPDATE transactions set keep=0 where profile=?",
 407                 new String[]{profile.getUuid()});
 408         db.execSQL("update account_values set keep=0 where profile=?;",
 409                 new String[]{profile.getUuid()});
 410         db.execSQL("update accounts set keep=0 where profile=?;", new String[]{profile.getUuid()});
 411     }
 412     private boolean retrieveAccountList() throws IOException, HTTPException {
 413         Progress progress = new Progress();
 414
 415         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "accounts");
 416         http.setAllowUserInteraction(false);
 417         switch (http.getResponseCode()) {
 418             case 200:
 419                 break;
 420             case 404:
 421                 return false;
 422             default:
 423                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 424         }
 425         publishProgress(progress);
 426         SQLiteDatabase db = App.getDatabase();
 427         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 428         boolean listFilledOK = false;
 429         try (InputStream resp = http.getInputStream()) {
 430             if (http.getResponseCode() != 200)
 431                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 432
 433             db.beginTransaction();
 434             try {
 435                 profile.markAccountsAsNotPresent(db);
 436
 437                 AccountListParser parser = new AccountListParser(resp);
 438
 439                 LedgerAccount prevAccount = null;
 440
 441                 while (true) {
 442                     throwIfCancelled();
 443                     ParsedLedgerAccount parsedAccount = parser.nextAccount();
 444                     if (parsedAccount == null) break;
 445
 446                     LedgerAccount acc = profile.tryLoadAccount(db, parsedAccount.getAname());
 447                     if (acc == null) acc = new LedgerAccount(parsedAccount.getAname());
 448                     else acc.removeAmounts();
 449
 450                     profile.storeAccount(db, acc);
 451                     String lastCurrency = null;
 452                     float lastCurrencyAmount = 0;
 453                     for (ParsedBalance b : parsedAccount.getAibalance()) {
 454                         final String currency = b.getAcommodity();
 455                         final float amount = b.getAquantity().asFloat();
 456                         if (currency.equals(lastCurrency)) lastCurrencyAmount += amount;
 457                         else {
 458                             if (lastCurrency != null) {
 459                                 profile.storeAccountValue(db, acc.getName(), lastCurrency,
 460                                         lastCurrencyAmount);
 461                                 acc.addAmount(lastCurrencyAmount, lastCurrency);
 462                             }
 463                             lastCurrency = currency;
 464                             lastCurrencyAmount = amount;
 465                         }
 466                     }
 467                     if (lastCurrency != null) {
 468                         profile.storeAccountValue(db, acc.getName(), lastCurrency,
 469                                 lastCurrencyAmount);
 470                         acc.addAmount(lastCurrencyAmount, lastCurrency);
 471                     }
 472
 473                     if (acc.isVisible(accountList)) accountList.add(acc);
 474
 475                     if (prevAccount != null) {
 476                         prevAccount.setHasSubAccounts(
 477                                 acc.getName().startsWith(prevAccount.getName() + ":"));
 478                     }
 479
 480                     prevAccount = acc;
 481                 }
 482                 throwIfCancelled();
 483
 484                 profile.deleteNotPresentAccounts(db);
 485                 throwIfCancelled();
 486                 db.setTransactionSuccessful();
 487                 listFilledOK = true;
 488             }
 489             finally {
 490                 db.endTransaction();
 491             }
 492         }
 493         // should not be set in the DB transaction, because of a possible deadlock
 494         // with the main and DbOpQueueRunner threads
 495         if (listFilledOK) Data.accounts.setList(accountList);
 496
 497         return true;
 498     }
 499     private boolean retrieveTransactionList() throws IOException, ParseException, HTTPException {
 500         Progress progress = new Progress();
 501         int maxTransactionId = Progress.INDETERMINATE;
 502
 503         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "transactions");
 504         http.setAllowUserInteraction(false);
 505         publishProgress(progress);
 506         switch (http.getResponseCode()) {
 507             case 200:
 508                 break;
 509             case 404:
 510                 return false;
 511             default:
 512                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 513         }
 514         SQLiteDatabase db = App.getDatabase();
 515         try (InputStream resp = http.getInputStream()) {
 516             if (http.getResponseCode() != 200)
 517                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 518             throwIfCancelled();
 519             db.beginTransaction();
 520             try {
 521                 profile.markTransactionsAsNotPresent(db);
 522
 523                 int matchedTransactionsCount = 0;
 524                 TransactionListParser parser = new TransactionListParser(resp);
 525
 526                 int processedTransactionCount = 0;
 527
 528                 DetectedTransactionOrder transactionOrder = DetectedTransactionOrder.UNKNOWN;
 529                 int orderAccumulator = 0;
 530                 int lastTransactionId = 0;
 531
 532                 while (true) {
 533                     throwIfCancelled();
 534                     ParsedLedgerTransaction parsedTransaction = parser.nextTransaction();
 535                     throwIfCancelled();
 536                     if (parsedTransaction == null) break;
 537
 538                     LedgerTransaction transaction = parsedTransaction.asLedgerTransaction();
 539                     if (transaction.getId() > lastTransactionId) orderAccumulator++;
 540                     else orderAccumulator--;
 541                     lastTransactionId = transaction.getId();
 542                     if (transactionOrder == DetectedTransactionOrder.UNKNOWN) {
 543                         if (orderAccumulator > 30) {
 544                             transactionOrder = DetectedTransactionOrder.FILE;
 545                             debug("rtt", String.format(Locale.ENGLISH,
 546                                     "Detected native file order after %d transactions (factor %d)",
 547                                     processedTransactionCount, orderAccumulator));
 548                             progress.setTotal(Data.transactions.size());
 549                         }
 550                         else if (orderAccumulator < -30) {
 551                             transactionOrder = DetectedTransactionOrder.REVERSE_CHRONOLOGICAL;
 552                             debug("rtt", String.format(Locale.ENGLISH,
 553                                     "Detected reverse chronological order after %d transactions (factor %d)",
 554                                     processedTransactionCount, orderAccumulator));
 555                         }
 556                     }
 557
 558                     if (transaction.existsInDb(db)) {
 559                         profile.markTransactionAsPresent(db, transaction);
 560                         matchedTransactionsCount++;
 561
 562                         if ((transactionOrder == DetectedTransactionOrder.REVERSE_CHRONOLOGICAL) &&
 563                             (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT))
 564                         {
 565                             profile.markTransactionsBeforeTransactionAsPresent(db, transaction);
 566                             progress.setTotal(progress.getProgress());
 567                             publishProgress(progress);
 568                             db.setTransactionSuccessful();
 569                             profile.setLastUpdateStamp();
 570                             return true;
 571                         }
 572                     }
 573                     else {
 574                         profile.storeTransaction(db, transaction);
 575                         matchedTransactionsCount = 0;
 576                         progress.setTotal(maxTransactionId);
 577                     }
 578
 579
 580                     if ((transactionOrder != DetectedTransactionOrder.UNKNOWN) &&
 581                         ((progress.getTotal() == Progress.INDETERMINATE) ||
 582                          (progress.getTotal() < transaction.getId())))
 583                         progress.setTotal(transaction.getId());
 584
 585                     progress.setProgress(++processedTransactionCount);
 586                     publishProgress(progress);
 587                 }
 588
 589                 throwIfCancelled();
 590                 profile.deleteNotPresentTransactions(db);
 591                 throwIfCancelled();
 592                 db.setTransactionSuccessful();
 593                 profile.setLastUpdateStamp();
 594             }
 595             finally {
 596                 db.endTransaction();
 597             }
 598         }
 599
 600         return true;
 601     }
 602
 603     @SuppressLint("DefaultLocale")
 604     @Override
 605     protected String doInBackground(Void... params) {
 606         Data.backgroundTaskStarted();
 607         try {
 608             if (!retrieveAccountList() || !retrieveTransactionList())
 609                 return retrieveTransactionListLegacy();
 610             return null;
 611         }
 612         catch (MalformedURLException e) {
 613             e.printStackTrace();
 614             return "Invalid server URL";
 615         }
 616         catch (HTTPException e) {
 617             e.printStackTrace();
 618             return String.format("HTTP error %d: %s", e.getResponseCode(), e.getResponseMessage());
 619         }
 620         catch (IOException e) {
 621             e.printStackTrace();
 622             return e.getLocalizedMessage();
 623         }
 624         catch (ParseException e) {
 625             e.printStackTrace();
 626             return "Network error";
 627         }
 628         catch (OperationCanceledException e) {
 629             e.printStackTrace();
 630             return "Operation cancelled";
 631         }
 632         finally {
 633             Data.backgroundTaskFinished();
 634         }
 635     }
 636     private MainActivity getContext() {
 637         return contextRef.get();
 638     }
 639     private void throwIfCancelled() {
 640         if (isCancelled()) throw new OperationCanceledException(null);
 641     }
 642     enum DetectedTransactionOrder {UNKNOWN, REVERSE_CHRONOLOGICAL, FILE}
 643
 644     private enum ParserState {
 645         EXPECTING_ACCOUNT, EXPECTING_ACCOUNT_AMOUNT, EXPECTING_JOURNAL, EXPECTING_TRANSACTION,
 646         EXPECTING_TRANSACTION_DESCRIPTION, EXPECTING_TRANSACTION_DETAILS
 647     }
 648
 649     public class Progress {
 650         public static final int INDETERMINATE = -1;
 651         private int progress;
 652         private int total;
 653         Progress() {
 654             this(INDETERMINATE, INDETERMINATE);
 655         }
 656         Progress(int progress, int total) {
 657             this.progress = progress;
 658             this.total = total;
 659         }
 660         public int getProgress() {
 661             return progress;
 662         }
 663         protected void setProgress(int progress) {
 664             this.progress = progress;
 665         }
 666         public int getTotal() {
 667             return total;
 668         }
 669         protected void setTotal(int total) {
 670             this.total = total;
 671         }
 672     }
 673
 674     private class TransactionParserException extends IllegalStateException {
 675         TransactionParserException(String message) {
 676             super(message);
 677         }
 678     }
 679 }