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

   1 /*
   2  * Copyright © 2019 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.async;
  19
  20 import android.annotation.SuppressLint;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.os.AsyncTask;
  23 import android.os.OperationCanceledException;
  24
  25 import androidx.annotation.NonNull;
  26
  27 import net.ktnx.mobileledger.App;
  28 import net.ktnx.mobileledger.err.HTTPException;
  29 import net.ktnx.mobileledger.json.v1_15.AccountListParser;
  30 import net.ktnx.mobileledger.json.v1_15.ParsedBalance;
  31 import net.ktnx.mobileledger.json.v1_15.ParsedLedgerAccount;
  32 import net.ktnx.mobileledger.json.v1_15.ParsedLedgerTransaction;
  33 import net.ktnx.mobileledger.json.v1_15.TransactionListParser;
  34 import net.ktnx.mobileledger.model.Data;
  35 import net.ktnx.mobileledger.model.LedgerAccount;
  36 import net.ktnx.mobileledger.model.LedgerTransaction;
  37 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  38 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  39 import net.ktnx.mobileledger.ui.activity.MainActivity;
  40 import net.ktnx.mobileledger.utils.NetworkUtil;
  41
  42 import java.io.BufferedReader;
  43 import java.io.IOException;
  44 import java.io.InputStream;
  45 import java.io.InputStreamReader;
  46 import java.lang.ref.WeakReference;
  47 import java.net.HttpURLConnection;
  48 import java.net.MalformedURLException;
  49 import java.net.URLDecoder;
  50 import java.nio.charset.StandardCharsets;
  51 import java.text.ParseException;
  52 import java.util.ArrayList;
  53 import java.util.HashMap;
  54 import java.util.Locale;
  55 import java.util.Stack;
  56 import java.util.regex.Matcher;
  57 import java.util.regex.Pattern;
  58
  59 import static net.ktnx.mobileledger.utils.Logger.debug;
  60
  61
  62 public class RetrieveTransactionsTask
  63         extends AsyncTask<Void, RetrieveTransactionsTask.Progress, String> {
  64     private static final int MATCHING_TRANSACTIONS_LIMIT = 150;
  65     private static final Pattern reComment = Pattern.compile("^\\s*;");
  66     private static final Pattern reTransactionStart = Pattern.compile("<tr class=\"title\" " +
  67                                                                       "id=\"transaction-(\\d+)\"><td class=\"date\"[^\"]*>([\\d.-]+)</td>");
  68     private static final Pattern reTransactionDescription =
  69             Pattern.compile("<tr class=\"posting\" title=\"(\\S+)\\s(.+)");
  70     private static final Pattern reTransactionDetails = Pattern.compile(
  71             "^\\s+" + "([!*]\\s+)?" + "(\\S[\\S\\s]+\\S)\\s\\s+" + "(?:([^\\d\\s+\\-]+)\\s*)?" +
  72             "([-+]?\\d[\\d,.]*)" + "(?:\\s*([^\\d\\s+\\-]+)\\s*$)?");
  73     private static final Pattern reEnd = Pattern.compile("\\bid=\"addmodal\"");
  74     private static final Pattern reDecimalPoint = Pattern.compile("\\.\\d\\d?$");
  75     private static final Pattern reDecimalComma = Pattern.compile(",\\d\\d?$");
  76     private WeakReference<MainActivity> contextRef;
  77     // %3A is '='
  78     private Pattern reAccountName = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  79     private Pattern reAccountValue = Pattern.compile(
  80             "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  81     private MobileLedgerProfile profile;
  82     public RetrieveTransactionsTask(WeakReference<MainActivity> contextRef,
  83                                     @NonNull MobileLedgerProfile profile) {
  84         this.contextRef = contextRef;
  85         this.profile = profile;
  86     }
  87     private static void L(String msg) {
  88         //debug("transaction-parser", msg);
  89     }
  90     static LedgerTransactionAccount parseTransactionAccountLine(String line) {
  91         Matcher m = reTransactionDetails.matcher(line);
  92         if (m.find()) {
  93             String postingStatus = m.group(1);
  94             String acc_name = m.group(2);
  95             String currencyPre = m.group(3);
  96             String amount = m.group(4);
  97             String currencyPost = m.group(5);
  98
  99             String currency = null;
 100             if ((currencyPre != null) && (currencyPre.length() > 0)) {
 101                 if ((currencyPost != null) && (currencyPost.length() > 0))
 102                     return null;
 103                 currency = currencyPre;
 104             }
 105             else if ((currencyPost != null) && (currencyPost.length() > 0)) {
 106                 currency = currencyPost;
 107             }
 108
 109             amount = amount.replace(',', '.');
 110
 111             return new LedgerTransactionAccount(acc_name, Float.valueOf(amount), currency, null);
 112         }
 113         else {
 114             return null;
 115         }
 116     }
 117     @Override
 118     protected void onProgressUpdate(Progress... values) {
 119         super.onProgressUpdate(values);
 120         MainActivity context = getContext();
 121         if (context == null) return;
 122         context.onRetrieveProgress(values[0]);
 123     }
 124     @Override
 125     protected void onPreExecute() {
 126         super.onPreExecute();
 127         MainActivity context = getContext();
 128         if (context == null) return;
 129         context.onRetrieveStart();
 130     }
 131     @Override
 132     protected void onPostExecute(String error) {
 133         super.onPostExecute(error);
 134         MainActivity context = getContext();
 135         if (context == null) return;
 136         context.onRetrieveDone(error);
 137     }
 138     @Override
 139     protected void onCancelled() {
 140         super.onCancelled();
 141         MainActivity context = getContext();
 142         if (context == null) return;
 143         context.onRetrieveDone(null);
 144     }
 145     private String retrieveTransactionListLegacy()
 146             throws IOException, ParseException, HTTPException {
 147         Progress progress = new Progress();
 148         int maxTransactionId = Progress.INDETERMINATE;
 149         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 150         HashMap<String, Void> accountNames = new HashMap<>();
 151         HashMap<String, LedgerAccount> syntheticAccounts = new HashMap<>();
 152         LedgerAccount lastAccount = null, prevAccount = null;
 153
 154         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "journal");
 155         http.setAllowUserInteraction(false);
 156         publishProgress(progress);
 157         switch (http.getResponseCode()) {
 158             case 200:
 159                 break;
 160             default:
 161                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 162         }
 163
 164         SQLiteDatabase db = App.getDatabase();
 165         try (InputStream resp = http.getInputStream()) {
 166             if (http.getResponseCode() != 200)
 167                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 168             db.beginTransaction();
 169             try {
 170                 prepareDbForRetrieval(db, profile);
 171
 172                 int matchedTransactionsCount = 0;
 173
 174
 175                 ParserState state = ParserState.EXPECTING_ACCOUNT;
 176                 String line;
 177                 BufferedReader buf =
 178                         new BufferedReader(new InputStreamReader(resp, StandardCharsets.UTF_8));
 179
 180                 int processedTransactionCount = 0;
 181                 int transactionId = 0;
 182                 LedgerTransaction transaction = null;
 183                 LINES:
 184                 while ((line = buf.readLine()) != null) {
 185                     throwIfCancelled();
 186                     Matcher m;
 187                     m = reComment.matcher(line);
 188                     if (m.find()) {
 189                         // TODO: comments are ignored for now
 190 //                            Log.v("transaction-parser", "Ignoring comment");
 191                         continue;
 192                     }
 193                     //L(String.format("State is %d", updating));
 194                     switch (state) {
 195                         case EXPECTING_ACCOUNT:
 196                             if (line.equals("<h2>General Journal</h2>")) {
 197                                 state = ParserState.EXPECTING_TRANSACTION;
 198                                 L("→ expecting transaction");
 199                                 // commit the current transaction and start a new one
 200                                 // the account list in the UI should reflect the (committed)
 201                                 // state of the database
 202                                 db.setTransactionSuccessful();
 203                                 db.endTransaction();
 204                                 Data.accounts.setList(accountList);
 205                                 db.beginTransaction();
 206                                 continue;
 207                             }
 208                             m = reAccountName.matcher(line);
 209                             if (m.find()) {
 210                                 String acct_encoded = m.group(1);
 211                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
 212                                 acct_name = acct_name.replace("\"", "");
 213                                 L(String.format("found account: %s", acct_name));
 214
 215                                 prevAccount = lastAccount;
 216                                 lastAccount = profile.tryLoadAccount(db, acct_name);
 217                                 if (lastAccount == null) lastAccount = new LedgerAccount(acct_name);
 218                                 else lastAccount.removeAmounts();
 219                                 profile.storeAccount(db, lastAccount);
 220
 221                                 if (prevAccount != null) prevAccount
 222                                         .setHasSubAccounts(prevAccount.isParentOf(lastAccount));
 223                                 // make sure the parent account(s) are present,
 224                                 // synthesising them if necessary
 225                                 // this happens when the (missing-in-HTML) parent account has
 226                                 // only one child so we create a synthetic parent account record,
 227                                 // copying the amounts when child's amounts are parsed
 228                                 String parentName = lastAccount.getParentName();
 229                                 if (parentName != null) {
 230                                     Stack<String> toAppend = new Stack<>();
 231                                     while (parentName != null) {
 232                                         if (accountNames.containsKey(parentName)) break;
 233                                         toAppend.push(parentName);
 234                                         parentName = new LedgerAccount(parentName).getParentName();
 235                                     }
 236                                     syntheticAccounts.clear();
 237                                     while (!toAppend.isEmpty()) {
 238                                         String aName = toAppend.pop();
 239                                         LedgerAccount acc = profile.tryLoadAccount(db, aName);
 240                                         if (acc == null) {
 241                                             acc = new LedgerAccount(aName);
 242                                             acc.setHiddenByStar(lastAccount.isHiddenByStar());
 243                                             acc.setExpanded(!lastAccount.hasSubAccounts() ||
 244                                                             lastAccount.isExpanded());
 245                                         }
 246                                         acc.setHasSubAccounts(true);
 247                                         acc.removeAmounts();    // filled below when amounts are parsed
 248                                         if (acc.isVisible(accountList))
 249                                             accountList.add(acc);
 250                                         L(String.format("gap-filling with %s", aName));
 251                                         accountNames.put(aName, null);
 252                                         profile.storeAccount(db, acc);
 253                                         syntheticAccounts.put(aName, acc);
 254                                     }
 255                                 }
 256
 257                                 if (lastAccount.isVisible(accountList))
 258                                     accountList.add(lastAccount);
 259                                 accountNames.put(acct_name, null);
 260
 261                                 state = ParserState.EXPECTING_ACCOUNT_AMOUNT;
 262                                 L("→ expecting account amount");
 263                             }
 264                             break;
 265
 266                         case EXPECTING_ACCOUNT_AMOUNT:
 267                             m = reAccountValue.matcher(line);
 268                             boolean match_found = false;
 269                             while (m.find()) {
 270                                 throwIfCancelled();
 271
 272                                 match_found = true;
 273                                 String value = m.group(1);
 274                                 String currency = m.group(2);
 275                                 if (currency == null) currency = "";
 276
 277                                 {
 278                                     Matcher tmpM = reDecimalComma.matcher(value);
 279                                     if (tmpM.find()) {
 280                                         value = value.replace(".", "");
 281                                         value = value.replace(',', '.');
 282                                     }
 283
 284                                     tmpM = reDecimalPoint.matcher(value);
 285                                     if (tmpM.find()) {
 286                                         value = value.replace(",", "");
 287                                         value = value.replace(" ", "");
 288                                     }
 289                                 }
 290                                 L("curr=" + currency + ", value=" + value);
 291                                 final float val = Float.parseFloat(value);
 292                                 profile.storeAccountValue(db, lastAccount.getName(), currency, val);
 293                                 lastAccount.addAmount(val, currency);
 294                                 for (LedgerAccount syn : syntheticAccounts.values()) {
 295                                     L(String.format(Locale.ENGLISH, "propagating %s %1.2f to %s",
 296                                             currency, val, syn.getName()));
 297                                     syn.addAmount(val, currency);
 298                                     profile.storeAccountValue(db, syn.getName(), currency, val);
 299                                 }
 300                             }
 301
 302                             if (match_found) {
 303                                 syntheticAccounts.clear();
 304                                 state = ParserState.EXPECTING_ACCOUNT;
 305                                 L("→ expecting account");
 306                             }
 307
 308                             break;
 309
 310                         case EXPECTING_TRANSACTION:
 311                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 312                             m = reTransactionStart.matcher(line);
 313                             if (m.find()) {
 314                                 transactionId = Integer.valueOf(m.group(1));
 315                                 state = ParserState.EXPECTING_TRANSACTION_DESCRIPTION;
 316                                 L(String.format(Locale.ENGLISH,
 317                                         "found transaction %d → expecting description",
 318                                         transactionId));
 319                                 progress.setProgress(++processedTransactionCount);
 320                                 if (maxTransactionId < transactionId)
 321                                     maxTransactionId = transactionId;
 322                                 if ((progress.getTotal() == Progress.INDETERMINATE) ||
 323                                     (progress.getTotal() < transactionId))
 324                                     progress.setTotal(transactionId);
 325                                 publishProgress(progress);
 326                             }
 327                             m = reEnd.matcher(line);
 328                             if (m.find()) {
 329                                 L("--- transaction value complete ---");
 330                                 break LINES;
 331                             }
 332                             break;
 333
 334                         case EXPECTING_TRANSACTION_DESCRIPTION:
 335                             if (!line.isEmpty() && (line.charAt(0) == ' ')) continue;
 336                             m = reTransactionDescription.matcher(line);
 337                             if (m.find()) {
 338                                 if (transactionId == 0) throw new TransactionParserException(
 339                                         "Transaction Id is 0 while expecting " + "description");
 340
 341                                 String date = m.group(1);
 342                                 try {
 343                                     int equalsIndex = date.indexOf('=');
 344                                     if (equalsIndex >= 0) date = date.substring(equalsIndex + 1);
 345                                     transaction =
 346                                             new LedgerTransaction(transactionId, date, m.group(2));
 347                                 }
 348                                 catch (ParseException e) {
 349                                     e.printStackTrace();
 350                                     return String.format("Error parsing date '%s'", date);
 351                                 }
 352                                 state = ParserState.EXPECTING_TRANSACTION_DETAILS;
 353                                 L(String.format(Locale.ENGLISH,
 354                                         "transaction %d created for %s (%s) →" +
 355                                         " expecting details", transactionId, date, m.group(2)));
 356                             }
 357                             break;
 358
 359                         case EXPECTING_TRANSACTION_DETAILS:
 360                             if (line.isEmpty()) {
 361                                 // transaction data collected
 362                                 if (transaction.existsInDb(db)) {
 363                                     profile.markTransactionAsPresent(db, transaction);
 364                                     matchedTransactionsCount++;
 365
 366                                     if (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT) {
 367                                         profile.markTransactionsBeforeTransactionAsPresent(db,
 368                                                 transaction);
 369                                         progress.setTotal(progress.getProgress());
 370                                         publishProgress(progress);
 371                                         break LINES;
 372                                     }
 373                                 }
 374                                 else {
 375                                     profile.storeTransaction(db, transaction);
 376                                     matchedTransactionsCount = 0;
 377                                     progress.setTotal(maxTransactionId);
 378                                 }
 379
 380                                 state = ParserState.EXPECTING_TRANSACTION;
 381                                 L(String.format("transaction %s saved → expecting transaction",
 382                                         transaction.getId()));
 383                                 transaction.finishLoading();
 384
 385 // sounds like a good idea, but transaction-1 may not be the first one chronologically
 386 // for example, when you add the initial seeding transaction after entering some others
 387 //                                            if (transactionId == 1) {
 388 //                                                L("This was the initial transaction. Terminating " +
 389 //                                                  "parser");
 390 //                                                break LINES;
 391 //                                            }
 392                             }
 393                             else {
 394                                 LedgerTransactionAccount lta = parseTransactionAccountLine(line);
 395                                 if (lta != null) {
 396                                     transaction.addAccount(lta);
 397                                     L(String.format(Locale.ENGLISH, "%d: %s = %s",
 398                                             transaction.getId(), lta.getAccountName(),
 399                                             lta.getAmount()));
 400                                 }
 401                                 else throw new IllegalStateException(
 402                                         String.format("Can't parse transaction %d " + "details: %s",
 403                                                 transactionId, line));
 404                             }
 405                             break;
 406                         default:
 407                             throw new RuntimeException(
 408                                     String.format("Unknown parser updating %s", state.name()));
 409                     }
 410                 }
 411
 412                 throwIfCancelled();
 413
 414                 profile.deleteNotPresentTransactions(db);
 415                 db.setTransactionSuccessful();
 416
 417                 profile.setLastUpdateStamp();
 418
 419                 return null;
 420             }
 421             finally {
 422                 db.endTransaction();
 423             }
 424         }
 425     }
 426     private void prepareDbForRetrieval(SQLiteDatabase db, MobileLedgerProfile profile) {
 427         db.execSQL("UPDATE transactions set keep=0 where profile=?",
 428                 new String[]{profile.getUuid()});
 429         db.execSQL("update account_values set keep=0 where profile=?;",
 430                 new String[]{profile.getUuid()});
 431         db.execSQL("update accounts set keep=0 where profile=?;", new String[]{profile.getUuid()});
 432     }
 433     private boolean retrieveAccountList() throws IOException, HTTPException {
 434         Progress progress = new Progress();
 435
 436         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "accounts");
 437         http.setAllowUserInteraction(false);
 438         switch (http.getResponseCode()) {
 439             case 200:
 440                 break;
 441             case 404:
 442                 return false;
 443             default:
 444                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 445         }
 446         publishProgress(progress);
 447         SQLiteDatabase db = App.getDatabase();
 448         ArrayList<LedgerAccount> accountList = new ArrayList<>();
 449         boolean listFilledOK = false;
 450         try (InputStream resp = http.getInputStream()) {
 451             if (http.getResponseCode() != 200)
 452                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 453
 454             db.beginTransaction();
 455             try {
 456                 profile.markAccountsAsNotPresent(db);
 457
 458                 AccountListParser parser = new AccountListParser(resp);
 459
 460                 LedgerAccount prevAccount = null;
 461
 462                 while (true) {
 463                     throwIfCancelled();
 464                     ParsedLedgerAccount parsedAccount = parser.nextAccount();
 465                     if (parsedAccount == null) break;
 466
 467                     LedgerAccount acc = profile.tryLoadAccount(db, parsedAccount.getAname());
 468                     if (acc == null) acc = new LedgerAccount(parsedAccount.getAname());
 469                     else acc.removeAmounts();
 470
 471                     profile.storeAccount(db, acc);
 472                     String lastCurrency = null;
 473                     float lastCurrencyAmount = 0;
 474                     for (ParsedBalance b : parsedAccount.getAibalance()) {
 475                         final String currency = b.getAcommodity();
 476                         final float amount = b.getAquantity().asFloat();
 477                         if (currency.equals(lastCurrency)) lastCurrencyAmount += amount;
 478                         else {
 479                             if (lastCurrency != null) {
 480                                 profile.storeAccountValue(db, acc.getName(), lastCurrency,
 481                                         lastCurrencyAmount);
 482                                 acc.addAmount(lastCurrencyAmount, lastCurrency);
 483                             }
 484                             lastCurrency = currency;
 485                             lastCurrencyAmount = amount;
 486                         }
 487                     }
 488                     if (lastCurrency != null) {
 489                         profile.storeAccountValue(db, acc.getName(), lastCurrency,
 490                                 lastCurrencyAmount);
 491                         acc.addAmount(lastCurrencyAmount, lastCurrency);
 492                     }
 493
 494                     if (acc.isVisible(accountList)) accountList.add(acc);
 495
 496                     if (prevAccount != null) {
 497                         prevAccount.setHasSubAccounts(
 498                                 acc.getName().startsWith(prevAccount.getName() + ":"));
 499                     }
 500
 501                     prevAccount = acc;
 502                 }
 503                 throwIfCancelled();
 504
 505                 profile.deleteNotPresentAccounts(db);
 506                 throwIfCancelled();
 507                 db.setTransactionSuccessful();
 508                 listFilledOK = true;
 509             }
 510             finally {
 511                 db.endTransaction();
 512             }
 513         }
 514         // should not be set in the DB transaction, because of a possible deadlock
 515         // with the main and DbOpQueueRunner threads
 516         if (listFilledOK) Data.accounts.setList(accountList);
 517
 518         return true;
 519     }
 520     private boolean retrieveTransactionList() throws IOException, ParseException, HTTPException {
 521         Progress progress = new Progress();
 522         int maxTransactionId = Progress.INDETERMINATE;
 523
 524         HttpURLConnection http = NetworkUtil.prepareConnection(profile, "transactions");
 525         http.setAllowUserInteraction(false);
 526         publishProgress(progress);
 527         switch (http.getResponseCode()) {
 528             case 200:
 529                 break;
 530             case 404:
 531                 return false;
 532             default:
 533                 throw new HTTPException(http.getResponseCode(), http.getResponseMessage());
 534         }
 535         SQLiteDatabase db = App.getDatabase();
 536         try (InputStream resp = http.getInputStream()) {
 537             if (http.getResponseCode() != 200)
 538                 throw new IOException(String.format("HTTP error %d", http.getResponseCode()));
 539             throwIfCancelled();
 540             db.beginTransaction();
 541             try {
 542                 profile.markTransactionsAsNotPresent(db);
 543
 544                 int matchedTransactionsCount = 0;
 545                 TransactionListParser parser = new TransactionListParser(resp);
 546
 547                 int processedTransactionCount = 0;
 548
 549                 DetectedTransactionOrder transactionOrder = DetectedTransactionOrder.UNKNOWN;
 550                 int orderAccumulator = 0;
 551                 int lastTransactionId = 0;
 552
 553                 while (true) {
 554                     throwIfCancelled();
 555                     ParsedLedgerTransaction parsedTransaction = parser.nextTransaction();
 556                     throwIfCancelled();
 557                     if (parsedTransaction == null) break;
 558
 559                     LedgerTransaction transaction = parsedTransaction.asLedgerTransaction();
 560                     if (transaction.getId() > lastTransactionId) orderAccumulator++;
 561                     else orderAccumulator--;
 562                     lastTransactionId = transaction.getId();
 563                     if (transactionOrder == DetectedTransactionOrder.UNKNOWN) {
 564                         if (orderAccumulator > 30) {
 565                             transactionOrder = DetectedTransactionOrder.FILE;
 566                             debug("rtt", String.format(Locale.ENGLISH,
 567                                     "Detected native file order after %d transactions (factor %d)",
 568                                     processedTransactionCount, orderAccumulator));
 569                             progress.setTotal(Data.transactions.size());
 570                         }
 571                         else if (orderAccumulator < -30) {
 572                             transactionOrder = DetectedTransactionOrder.REVERSE_CHRONOLOGICAL;
 573                             debug("rtt", String.format(Locale.ENGLISH,
 574                                     "Detected reverse chronological order after %d transactions (factor %d)",
 575                                     processedTransactionCount, orderAccumulator));
 576                         }
 577                     }
 578
 579                     if (transaction.existsInDb(db)) {
 580                         profile.markTransactionAsPresent(db, transaction);
 581                         matchedTransactionsCount++;
 582
 583                         if ((transactionOrder == DetectedTransactionOrder.REVERSE_CHRONOLOGICAL) &&
 584                             (matchedTransactionsCount == MATCHING_TRANSACTIONS_LIMIT))
 585                         {
 586                             profile.markTransactionsBeforeTransactionAsPresent(db, transaction);
 587                             progress.setTotal(progress.getProgress());
 588                             publishProgress(progress);
 589                             db.setTransactionSuccessful();
 590                             profile.setLastUpdateStamp();
 591                             return true;
 592                         }
 593                     }
 594                     else {
 595                         profile.storeTransaction(db, transaction);
 596                         matchedTransactionsCount = 0;
 597                         progress.setTotal(maxTransactionId);
 598                     }
 599
 600
 601                     if ((transactionOrder != DetectedTransactionOrder.UNKNOWN) &&
 602                         ((progress.getTotal() == Progress.INDETERMINATE) ||
 603                          (progress.getTotal() < transaction.getId())))
 604                         progress.setTotal(transaction.getId());
 605
 606                     progress.setProgress(++processedTransactionCount);
 607                     publishProgress(progress);
 608                 }
 609
 610                 throwIfCancelled();
 611                 profile.deleteNotPresentTransactions(db);
 612                 throwIfCancelled();
 613                 db.setTransactionSuccessful();
 614                 profile.setLastUpdateStamp();
 615             }
 616             finally {
 617                 db.endTransaction();
 618             }
 619         }
 620
 621         return true;
 622     }
 623
 624     @SuppressLint("DefaultLocale")
 625     @Override
 626     protected String doInBackground(Void... params) {
 627         Data.backgroundTaskStarted();
 628         try {
 629             if (!retrieveAccountList() || !retrieveTransactionList())
 630                 return retrieveTransactionListLegacy();
 631             return null;
 632         }
 633         catch (MalformedURLException e) {
 634             e.printStackTrace();
 635             return "Invalid server URL";
 636         }
 637         catch (HTTPException e) {
 638             e.printStackTrace();
 639             return String.format("HTTP error %d: %s", e.getResponseCode(), e.getResponseMessage());
 640         }
 641         catch (IOException e) {
 642             e.printStackTrace();
 643             return e.getLocalizedMessage();
 644         }
 645         catch (ParseException e) {
 646             e.printStackTrace();
 647             return "Network error";
 648         }
 649         catch (OperationCanceledException e) {
 650             e.printStackTrace();
 651             return "Operation cancelled";
 652         }
 653         finally {
 654             Data.backgroundTaskFinished();
 655         }
 656     }
 657     private MainActivity getContext() {
 658         return contextRef.get();
 659     }
 660     private void throwIfCancelled() {
 661         if (isCancelled()) throw new OperationCanceledException(null);
 662     }
 663     enum DetectedTransactionOrder {UNKNOWN, REVERSE_CHRONOLOGICAL, FILE}
 664
 665     private enum ParserState {
 666         EXPECTING_ACCOUNT, EXPECTING_ACCOUNT_AMOUNT, EXPECTING_JOURNAL, EXPECTING_TRANSACTION,
 667         EXPECTING_TRANSACTION_DESCRIPTION, EXPECTING_TRANSACTION_DETAILS
 668     }
 669
 670     public class Progress {
 671         public static final int INDETERMINATE = -1;
 672         private int progress;
 673         private int total;
 674         Progress() {
 675             this(INDETERMINATE, INDETERMINATE);
 676         }
 677         Progress(int progress, int total) {
 678             this.progress = progress;
 679             this.total = total;
 680         }
 681         public int getProgress() {
 682             return progress;
 683         }
 684         protected void setProgress(int progress) {
 685             this.progress = progress;
 686         }
 687         public int getTotal() {
 688             return total;
 689         }
 690         protected void setTotal(int total) {
 691             this.total = total;
 692         }
 693     }
 694
 695     private class TransactionParserException extends IllegalStateException {
 696         TransactionParserException(String message) {
 697             super(message);
 698         }
 699     }
 700 }