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