src/common/quassel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2018 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  19  ***************************************************************************/
  20
  21 #include "quassel.h"
  22
  23 #include <algorithm>
  24 #include <iostream>
  25
  26 #include <signal.h>
  27 #if !defined Q_OS_WIN && !defined Q_OS_MAC
  28 #  include <sys/types.h>
  29 #  include <sys/time.h>
  30 #  include <sys/resource.h>
  31 #endif
  32
  33 #include <QCoreApplication>
  34 #include <QDateTime>
  35 #include <QDir>
  36 #include <QFileInfo>
  37 #include <QHostAddress>
  38 #include <QLibraryInfo>
  39 #include <QMetaEnum>
  40 #include <QSettings>
  41 #include <QTranslator>
  42 #include <QUuid>
  43
  44 #include "bufferinfo.h"
  45 #include "identity.h"
  46 #include "logger.h"
  47 #include "message.h"
  48 #include "network.h"
  49 #include "peer.h"
  50 #include "protocol.h"
  51 #include "syncableobject.h"
  52 #include "types.h"
  53
  54 #include "../../version.h"
  55
  56 Quassel *Quassel::instance()
  57 {
  58     static Quassel instance;
  59     return &instance;
  60 }
  61
  62
  63 Quassel::Quassel()
  64 {
  65     // We catch SIGTERM and SIGINT (caused by Ctrl+C) to graceful shutdown Quassel.
  66     signal(SIGTERM, handleSignal);
  67     signal(SIGINT, handleSignal);
  68 #ifndef Q_OS_WIN
  69     // SIGHUP is used to reload configuration (i.e. SSL certificates)
  70     // Windows does not support SIGHUP
  71     signal(SIGHUP, handleSignal);
  72 #endif
  73 }
  74
  75
  76 bool Quassel::init()
  77 {
  78     if (instance()->_initialized)
  79         return true;  // allow multiple invocations because of MonolithicApplication
  80
  81     if (instance()->_handleCrashes) {
  82         // we have crashhandler for win32 and unix (based on execinfo).
  83 #if defined(Q_OS_WIN) || defined(HAVE_EXECINFO)
  84 # ifndef Q_OS_WIN
  85         // we only handle crashes ourselves if coredumps are disabled
  86         struct rlimit *limit = (rlimit *)malloc(sizeof(struct rlimit));
  87         int rc = getrlimit(RLIMIT_CORE, limit);
  88
  89         if (rc == -1 || !((long)limit->rlim_cur > 0 || limit->rlim_cur == RLIM_INFINITY)) {
  90 # endif /* Q_OS_WIN */
  91         signal(SIGABRT, handleSignal);
  92         signal(SIGSEGV, handleSignal);
  93 # ifndef Q_OS_WIN
  94         signal(SIGBUS, handleSignal);
  95     }
  96     free(limit);
  97 # endif /* Q_OS_WIN */
  98 #endif /* Q_OS_WIN || HAVE_EXECINFO */
  99     }
 100
 101     instance()->_initialized = true;
 102     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
 103
 104     instance()->setupEnvironment();
 105     instance()->registerMetaTypes();
 106
 107     Network::setDefaultCodecForServer("ISO-8859-1");
 108     Network::setDefaultCodecForEncoding("UTF-8");
 109     Network::setDefaultCodecForDecoding("ISO-8859-15");
 110
 111     if (isOptionSet("help")) {
 112         instance()->_cliParser->usage();
 113         return false;
 114     }
 115
 116     if (isOptionSet("version")) {
 117         std::cout << qPrintable("Quassel IRC: " + Quassel::buildInfo().plainVersionString) << std::endl;
 118         return false;
 119     }
 120
 121     // set up logging
 122     if (Quassel::runMode() != Quassel::ClientOnly) {
 123         if (isOptionSet("loglevel")) {
 124             QString level = optionValue("loglevel");
 125
 126             if (level == "Debug")
 127                 setLogLevel(DebugLevel);
 128             else if (level == "Info")
 129                 setLogLevel(InfoLevel);
 130             else if (level == "Warning")
 131                 setLogLevel(WarningLevel);
 132             else if (level == "Error")
 133                 setLogLevel(ErrorLevel);
 134             else {
 135                 qWarning() << qPrintable(tr("Invalid log level %1; supported are Debug|Info|Warning|Error").arg(level));
 136                 return false;
 137             }
 138         }
 139
 140         QString logfilename = optionValue("logfile");
 141         if (!logfilename.isEmpty()) {
 142             instance()->_logFile.reset(new QFile{logfilename});
 143             if (!logFile()->open(QIODevice::Append | QIODevice::Text)) {
 144                 qWarning() << "Could not open log file" << logfilename << ":" << logFile()->errorString();
 145                 instance()->_logFile.reset();
 146             }
 147         }
 148 #ifdef HAVE_SYSLOG
 149         instance()->_logToSyslog = isOptionSet("syslog");
 150 #endif
 151     }
 152
 153     return true;
 154 }
 155
 156
 157 void Quassel::destroy()
 158 {
 159     if (logFile()) {
 160         logFile()->close();
 161         instance()->_logFile.reset();
 162     }
 163 }
 164
 165
 166 void Quassel::registerQuitHandler(QuitHandler handler)
 167 {
 168     instance()->_quitHandlers.emplace_back(std::move(handler));
 169 }
 170
 171 void Quassel::quit()
 172 {
 173     if (_quitHandlers.empty()) {
 174         QCoreApplication::quit();
 175     }
 176     else {
 177         for (auto &&handler : _quitHandlers) {
 178             handler();
 179         }
 180     }
 181 }
 182
 183
 184 void Quassel::registerReloadHandler(ReloadHandler handler)
 185 {
 186     instance()->_reloadHandlers.emplace_back(std::move(handler));
 187 }
 188
 189
 190 bool Quassel::reloadConfig()
 191 {
 192     bool result{true};
 193     for (auto &&handler : _reloadHandlers) {
 194         result = result && handler();
 195     }
 196     return result;
 197 }
 198
 199
 200 //! Register our custom types with Qt's Meta Object System.
 201 /**  This makes them available for QVariant and in signals/slots, among other things.
 202 *
 203 */
 204 void Quassel::registerMetaTypes()
 205 {
 206     // Complex types
 207     qRegisterMetaType<Message>("Message");
 208     qRegisterMetaType<BufferInfo>("BufferInfo");
 209     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 210     qRegisterMetaType<Network::Server>("Network::Server");
 211     qRegisterMetaType<Identity>("Identity");
 212
 213     qRegisterMetaTypeStreamOperators<Message>("Message");
 214     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 215     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 216     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 217     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 218
 219     qRegisterMetaType<IdentityId>("IdentityId");
 220     qRegisterMetaType<BufferId>("BufferId");
 221     qRegisterMetaType<NetworkId>("NetworkId");
 222     qRegisterMetaType<UserId>("UserId");
 223     qRegisterMetaType<AccountId>("AccountId");
 224     qRegisterMetaType<MsgId>("MsgId");
 225
 226     qRegisterMetaType<QHostAddress>("QHostAddress");
 227     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 228     qRegisterMetaType<QUuid>("QUuid");
 229     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 230
 231     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 232     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 233     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 234     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 235     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 236     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 237
 238     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 239     qRegisterMetaType<PeerPtr>("PeerPtr");
 240     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 241
 242     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 243     if (!QMetaType::type("QVariant")) {
 244         qRegisterMetaType<QVariant>("QVariant");
 245         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 246     }
 247 }
 248
 249
 250 void Quassel::setupEnvironment()
 251 {
 252     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 253     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 254     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 255     // hack extra search paths into various places.
 256 #ifdef Q_OS_UNIX
 257     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 258     if (xdgDataVar.isEmpty())
 259         xdgDataVar = QLatin1String("/usr/local/share:/usr/share"); // sane defaults
 260
 261     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 262
 263     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 264     QString appDir = QCoreApplication::applicationDirPath();
 265     int binpos = appDir.lastIndexOf("/bin");
 266     if (binpos >= 0) {
 267         appDir.replace(binpos, 4, "/share");
 268         xdgDirs.append(appDir);
 269         // Also append apps/quassel, this is only for QIconLoader to find icons there
 270         xdgDirs.append(appDir + "/apps/quassel");
 271     } else
 272         xdgDirs.append(appDir);  // build directory is always the last fallback
 273
 274     xdgDirs.removeDuplicates();
 275
 276     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 277 #endif
 278 }
 279
 280
 281 void Quassel::setupBuildInfo()
 282 {
 283     BuildInfo buildInfo;
 284     buildInfo.applicationName = "quassel";
 285     buildInfo.coreApplicationName = "quasselcore";
 286     buildInfo.clientApplicationName = "quasselclient";
 287     buildInfo.organizationName = "Quassel Project";
 288     buildInfo.organizationDomain = "quassel-irc.org";
 289
 290     buildInfo.protocolVersion = 10; // FIXME: deprecated, will be removed
 291
 292     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 293     buildInfo.generatedVersion = GIT_DESCRIBE;
 294
 295     // Check if we got a commit hash
 296     if (!QString(GIT_HEAD).isEmpty()) {
 297         buildInfo.commitHash = GIT_HEAD;
 298         QDateTime date;
 299 #if QT_VERSION >= 0x050800
 300         date.setSecsSinceEpoch(GIT_COMMIT_DATE);
 301 #else
 302         // toSecsSinceEpoch() was added in Qt 5.8.  Manually downconvert to seconds for now.
 303         // See https://doc.qt.io/qt-5/qdatetime.html#toMSecsSinceEpoch
 304         // Warning generated if not converting the 1000 to a qint64 first.
 305         date.setMSecsSinceEpoch(GIT_COMMIT_DATE * (qint64)1000);
 306 #endif
 307         buildInfo.commitDate = date.toString();
 308     }
 309     else if (!QString(DIST_HASH).contains("Format")) {
 310         buildInfo.commitHash = DIST_HASH;
 311         buildInfo.commitDate = QString(DIST_DATE);
 312     }
 313
 314     // create a nice version string
 315     if (buildInfo.generatedVersion.isEmpty()) {
 316         if (!buildInfo.commitHash.isEmpty()) {
 317             // dist version
 318             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}
 319                                                .arg(buildInfo.baseVersion)
 320                                                .arg(buildInfo.commitHash.left(7));
 321             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 322                                                .arg(buildInfo.baseVersion)
 323                                                .arg(buildInfo.commitHash.left(7))
 324                                                .arg(buildInfo.commitHash);
 325         }
 326         else {
 327             // we only have a base version :(
 328             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 329         }
 330     }
 331     else {
 332         // analyze what we got from git-describe
 333         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 334         if (rx.exactMatch(buildInfo.generatedVersion)) {
 335             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 336             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 337             if (!buildInfo.commitHash.isEmpty()) {
 338                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 339                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 340             }
 341         }
 342         else {
 343             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 344         }
 345     }
 346     if (buildInfo.fancyVersionString.isEmpty()) {
 347         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 348     }
 349
 350     instance()->_buildInfo = std::move(buildInfo);
 351 }
 352
 353
 354 const Quassel::BuildInfo &Quassel::buildInfo()
 355 {
 356     return instance()->_buildInfo;
 357 }
 358
 359
 360 //! Signal handler for graceful shutdown.
 361 void Quassel::handleSignal(int sig)
 362 {
 363     switch (sig) {
 364     case SIGTERM:
 365     case SIGINT:
 366         qWarning("%s", qPrintable(QString("Caught signal %1 - exiting.").arg(sig)));
 367         instance()->quit();
 368         break;
 369 #ifndef Q_OS_WIN
 370 // Windows does not support SIGHUP
 371     case SIGHUP:
 372         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for
 373         // graceful reloading of processes.
 374         quInfo() << "Caught signal" << SIGHUP << "- reloading configuration";
 375         if (instance()->reloadConfig()) {
 376             quInfo() << "Successfully reloaded configuration";
 377         }
 378         break;
 379 #endif
 380     case SIGABRT:
 381     case SIGSEGV:
 382 #ifndef Q_OS_WIN
 383     case SIGBUS:
 384 #endif
 385         instance()->logBacktrace(instance()->coreDumpFileName());
 386         exit(EXIT_FAILURE);
 387     default:
 388         ;
 389     }
 390 }
 391
 392
 393 void Quassel::disableCrashHandler()
 394 {
 395     instance()->_handleCrashes = false;
 396 }
 397
 398
 399 Quassel::RunMode Quassel::runMode() {
 400     return instance()->_runMode;
 401 }
 402
 403
 404 void Quassel::setRunMode(RunMode runMode)
 405 {
 406     instance()->_runMode = runMode;
 407 }
 408
 409
 410 void Quassel::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 411 {
 412     instance()->_cliParser = std::move(parser);
 413 }
 414
 415
 416 QString Quassel::optionValue(const QString &key)
 417 {
 418     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 419 }
 420
 421
 422 bool Quassel::isOptionSet(const QString &key)
 423 {
 424     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 425 }
 426
 427
 428 Quassel::LogLevel Quassel::logLevel()
 429 {
 430     return instance()->_logLevel;
 431 }
 432
 433
 434 void Quassel::setLogLevel(LogLevel logLevel)
 435 {
 436     instance()->_logLevel = logLevel;
 437 }
 438
 439
 440 QFile *Quassel::logFile() {
 441     return instance()->_logFile.get();
 442 }
 443
 444
 445 bool Quassel::logToSyslog()
 446 {
 447     return instance()->_logToSyslog;
 448 }
 449
 450
 451 void Quassel::logFatalMessage(const char *msg)
 452 {
 453 #ifdef Q_OS_MAC
 454     Q_UNUSED(msg)
 455 #else
 456     QFile dumpFile(instance()->coreDumpFileName());
 457     dumpFile.open(QIODevice::Append);
 458     QTextStream dumpStream(&dumpFile);
 459
 460     dumpStream << "Fatal: " << msg << '\n';
 461     dumpStream.flush();
 462     dumpFile.close();
 463 #endif
 464 }
 465
 466
 467 const QString &Quassel::coreDumpFileName()
 468 {
 469     if (_coreDumpFileName.isEmpty()) {
 470         QDir configDir(configDirPath());
 471         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 472         QFile dumpFile(_coreDumpFileName);
 473         dumpFile.open(QIODevice::Append);
 474         QTextStream dumpStream(&dumpFile);
 475         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 476         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 477         dumpStream.flush();
 478         dumpFile.close();
 479     }
 480     return _coreDumpFileName;
 481 }
 482
 483
 484 QString Quassel::configDirPath()
 485 {
 486     if (!instance()->_configDirPath.isEmpty())
 487         return instance()->_configDirPath;
 488
 489     QString path;
 490     if (isOptionSet("datadir")) {
 491         qWarning() << "Obsolete option --datadir used!";
 492         path = Quassel::optionValue("datadir");
 493     }
 494     else if (isOptionSet("configdir")) {
 495         path = Quassel::optionValue("configdir");
 496     }
 497     else {
 498 #ifdef Q_OS_MAC
 499         // On Mac, the path is always the same
 500         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 501 #else
 502         // We abuse QSettings to find us a sensible path on the other platforms
 503 #  ifdef Q_OS_WIN
 504         // don't use the registry
 505         QSettings::Format format = QSettings::IniFormat;
 506 #  else
 507         QSettings::Format format = QSettings::NativeFormat;
 508 #  endif
 509         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 510         QFileInfo fileInfo(s.fileName());
 511         path = fileInfo.dir().absolutePath();
 512 #endif /* Q_OS_MAC */
 513     }
 514
 515     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 516         path += QDir::separator();
 517
 518     QDir qDir{path};
 519     if (!qDir.exists(path)) {
 520         if (!qDir.mkpath(path)) {
 521             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 522             return {};
 523         }
 524     }
 525
 526     instance()->_configDirPath = path;
 527
 528     return path;
 529 }
 530
 531
 532 void Quassel::setDataDirPaths(const QStringList &paths) {
 533     instance()->_dataDirPaths = paths;
 534 }
 535
 536
 537 QStringList Quassel::dataDirPaths()
 538 {
 539     return instance()->_dataDirPaths;
 540 }
 541
 542
 543 QStringList Quassel::findDataDirPaths()
 544 {
 545     // TODO Qt5
 546     // We don't use QStandardPaths for now, as we still need to provide fallbacks for Qt4 and
 547     // want to stay consistent.
 548
 549     QStringList dataDirNames;
 550 #ifdef Q_OS_WIN
 551     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 552                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 553                  << QCoreApplication::applicationDirPath();
 554 #elif defined Q_OS_MAC
 555     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 556                  << QCoreApplication::applicationDirPath();
 557 #else
 558     // Linux et al
 559
 560     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 561     // This should thus come first.
 562     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 563     if (xdgDataHome.isEmpty())
 564         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 565     dataDirNames << xdgDataHome;
 566
 567     // Now whatever is configured through XDG_DATA_DIRS
 568     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 569     if (xdgDataDirs.isEmpty())
 570         dataDirNames << "/usr/local/share" << "/usr/share";
 571     else
 572         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 573
 574     // Just in case, also check our install prefix
 575     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 576
 577     // Normalize and append our application name
 578     for (int i = 0; i < dataDirNames.count(); i++)
 579         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 580
 581 #endif
 582
 583     // Add resource path and workdir just in case.
 584     // Workdir should have precedence
 585     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 586     dataDirNames.append(":/data/");
 587
 588     // Append trailing '/' and check for existence
 589     auto iter = dataDirNames.begin();
 590     while (iter != dataDirNames.end()) {
 591         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 592             iter->append(QDir::separator());
 593         if (!QFile::exists(*iter))
 594             iter = dataDirNames.erase(iter);
 595         else
 596             ++iter;
 597     }
 598
 599     dataDirNames.removeDuplicates();
 600
 601     return dataDirNames;
 602 }
 603
 604
 605 QString Quassel::findDataFilePath(const QString &fileName)
 606 {
 607     QStringList dataDirs = dataDirPaths();
 608     foreach(QString dataDir, dataDirs) {
 609         QString path = dataDir + fileName;
 610         if (QFile::exists(path))
 611             return path;
 612     }
 613     return QString();
 614 }
 615
 616
 617 QStringList Quassel::scriptDirPaths()
 618 {
 619     QStringList res(configDirPath() + "scripts/");
 620     foreach(QString path, dataDirPaths())
 621     res << path + "scripts/";
 622     return res;
 623 }
 624
 625
 626 QString Quassel::translationDirPath()
 627 {
 628     if (instance()->_translationDirPath.isEmpty()) {
 629         // We support only one translation dir; fallback mechanisms wouldn't work else.
 630         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 631         foreach(const QString &dir, dataDirPaths()) {
 632             if (QFile::exists(dir + "translations/")) {
 633                 instance()->_translationDirPath = dir + "translations/";
 634                 break;
 635             }
 636         }
 637         if (instance()->_translationDirPath.isEmpty())
 638             instance()->_translationDirPath = ":/i18n/";
 639     }
 640     return instance()->_translationDirPath;
 641 }
 642
 643
 644 void Quassel::loadTranslation(const QLocale &locale)
 645 {
 646     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 647     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 648
 649     if (qtTranslator)
 650         qApp->removeTranslator(qtTranslator);
 651     if (quasselTranslator)
 652         qApp->removeTranslator(quasselTranslator);
 653
 654     // We use QLocale::C to indicate that we don't want a translation
 655     if (locale.language() == QLocale::C)
 656         return;
 657
 658     qtTranslator = new QTranslator(qApp);
 659     qtTranslator->setObjectName("QtTr");
 660     qApp->installTranslator(qtTranslator);
 661
 662     quasselTranslator = new QTranslator(qApp);
 663     quasselTranslator->setObjectName("QuasselTr");
 664     qApp->installTranslator(quasselTranslator);
 665
 666 #if QT_VERSION >= 0x040800 && !defined Q_OS_MAC
 667     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 668     if (!success)
 669         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 670     quasselTranslator->load(locale, QString(""), translationDirPath());
 671 #else
 672     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 673     if (!success)
 674         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 675     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 676 #endif
 677 }
 678
 679
 680 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 681
 682 Quassel::Features::Features()
 683 {
 684     QStringList features;
 685
 686     // TODO Qt5: Use QMetaEnum::fromType()
 687     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 688     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 689 }
 690
 691
 692 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 693 {
 694     // TODO Qt5: Use QMetaEnum::fromType()
 695     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 696     _features.resize(featureEnum.keyCount(), false);
 697
 698     for (auto &&feature : features) {
 699         int i = featureEnum.keyToValue(qPrintable(feature));
 700         if (i >= 0) {
 701             _features[i] = true;
 702         }
 703         else {
 704             _unknownFeatures << feature;
 705         }
 706     }
 707
 708     if (legacyFeatures) {
 709         // TODO Qt5: Use QMetaEnum::fromType()
 710         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 711         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 712             if (static_cast<quint32>(legacyFeatures) & mask) {
 713                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 714                 if (i >= 0) {
 715                     _features[i] = true;
 716                 }
 717             }
 718         }
 719     }
 720 }
 721
 722
 723 bool Quassel::Features::isEnabled(Feature feature) const
 724 {
 725     size_t i = static_cast<size_t>(feature);
 726     return i < _features.size() ? _features[i] : false;
 727 }
 728
 729
 730 QStringList Quassel::Features::toStringList(bool enabled) const
 731 {
 732     // Check if any feature is enabled
 733     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 734         return QStringList{} << "NoFeatures";
 735     }
 736
 737     QStringList result;
 738
 739     // TODO Qt5: Use QMetaEnum::fromType()
 740     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 741     for (quint32 i = 0; i < _features.size(); ++i) {
 742         if (_features[i] == enabled) {
 743             result << featureEnum.key(i);
 744         }
 745     }
 746     return result;
 747 }
 748
 749
 750 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 751 {
 752     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 753     quint32 result{0};
 754     // TODO Qt5: Use QMetaEnum::fromType()
 755     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 756     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 757
 758     for (quint32 i = 0; i < _features.size(); ++i) {
 759         if (_features[i]) {
 760             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 761             if (v >= 0) {
 762                 result |= v;
 763             }
 764         }
 765     }
 766     return static_cast<LegacyFeatures>(result);
 767 }
 768
 769
 770 QStringList Quassel::Features::unknownFeatures() const
 771 {
 772     return _unknownFeatures;
 773 }