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 <QCoreApplication>
  27 #include <QDateTime>
  28 #include <QDir>
  29 #include <QFileInfo>
  30 #include <QHostAddress>
  31 #include <QLibraryInfo>
  32 #include <QMetaEnum>
  33 #include <QSettings>
  34 #include <QTranslator>
  35 #include <QUuid>
  36
  37 #include "bufferinfo.h"
  38 #include "identity.h"
  39 #include "logger.h"
  40 #include "logmessage.h"
  41 #include "message.h"
  42 #include "network.h"
  43 #include "peer.h"
  44 #include "protocol.h"
  45 #include "syncableobject.h"
  46 #include "types.h"
  47
  48 #ifndef Q_OS_WIN
  49 #    include "posixsignalwatcher.h"
  50 #else
  51 #    include "windowssignalwatcher.h"
  52 #endif
  53
  54 #include "../../version.h"
  55
  56 Quassel::Quassel()
  57     : Singleton<Quassel>{this}
  58     , _logger{new Logger{this}}
  59 {
  60 }
  61
  62
  63 bool Quassel::init()
  64 {
  65     if (instance()->_initialized)
  66         return true;  // allow multiple invocations because of MonolithicApplication
  67
  68     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
  69
  70     instance()->setupSignalHandling();
  71     instance()->setupEnvironment();
  72     instance()->registerMetaTypes();
  73
  74     instance()->_initialized = true;
  75
  76     Network::setDefaultCodecForServer("UTF-8");
  77     Network::setDefaultCodecForEncoding("UTF-8");
  78     Network::setDefaultCodecForDecoding("ISO-8859-15");
  79
  80     if (isOptionSet("help")) {
  81         instance()->_cliParser->usage();
  82         return false;
  83     }
  84
  85     if (isOptionSet("version")) {
  86         std::cout << qPrintable("Quassel IRC: " + Quassel::buildInfo().plainVersionString) << std::endl;
  87         return false;
  88     }
  89
  90     // Don't keep a debug log on the core
  91     return instance()->logger()->setup(runMode() != RunMode::CoreOnly);
  92 }
  93
  94
  95 Logger *Quassel::logger() const
  96 {
  97     return _logger;
  98 }
  99
 100
 101 void Quassel::registerQuitHandler(QuitHandler handler)
 102 {
 103     instance()->_quitHandlers.emplace_back(std::move(handler));
 104 }
 105
 106 void Quassel::quit()
 107 {
 108     // Protect against multiple invocations (e.g. triggered by MainWin::closeEvent())
 109     if (!_quitting) {
 110         _quitting = true;
 111         quInfo() << "Quitting...";
 112         if (_quitHandlers.empty()) {
 113             QCoreApplication::quit();
 114         }
 115         else {
 116             // Note: We expect one of the registered handlers to call QCoreApplication::quit()
 117             for (auto &&handler : _quitHandlers) {
 118                 handler();
 119             }
 120         }
 121     }
 122 }
 123
 124
 125 void Quassel::registerReloadHandler(ReloadHandler handler)
 126 {
 127     instance()->_reloadHandlers.emplace_back(std::move(handler));
 128 }
 129
 130
 131 bool Quassel::reloadConfig()
 132 {
 133     bool result{true};
 134     for (auto &&handler : _reloadHandlers) {
 135         result = result && handler();
 136     }
 137     return result;
 138 }
 139
 140
 141 //! Register our custom types with Qt's Meta Object System.
 142 /**  This makes them available for QVariant and in signals/slots, among other things.
 143 *
 144 */
 145 void Quassel::registerMetaTypes()
 146 {
 147     // Complex types
 148     qRegisterMetaType<Message>("Message");
 149     qRegisterMetaType<BufferInfo>("BufferInfo");
 150     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 151     qRegisterMetaType<Network::Server>("Network::Server");
 152     qRegisterMetaType<Identity>("Identity");
 153
 154     qRegisterMetaTypeStreamOperators<Message>("Message");
 155     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 156     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 157     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 158     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 159
 160     qRegisterMetaType<IdentityId>("IdentityId");
 161     qRegisterMetaType<BufferId>("BufferId");
 162     qRegisterMetaType<NetworkId>("NetworkId");
 163     qRegisterMetaType<UserId>("UserId");
 164     qRegisterMetaType<AccountId>("AccountId");
 165     qRegisterMetaType<MsgId>("MsgId");
 166
 167     qRegisterMetaType<QHostAddress>("QHostAddress");
 168     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 169     qRegisterMetaType<QUuid>("QUuid");
 170     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 171
 172     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 173     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 174     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 175     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 176     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 177     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 178
 179     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 180     qRegisterMetaType<PeerPtr>("PeerPtr");
 181     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 182
 183     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 184     if (!QMetaType::type("QVariant")) {
 185         qRegisterMetaType<QVariant>("QVariant");
 186         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 187     }
 188 }
 189
 190
 191 void Quassel::setupEnvironment()
 192 {
 193     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 194     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 195     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 196     // hack extra search paths into various places.
 197 #ifdef Q_OS_UNIX
 198     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 199     if (xdgDataVar.isEmpty())
 200         xdgDataVar = QLatin1String("/usr/local/share:/usr/share"); // sane defaults
 201
 202     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 203
 204     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 205     QString appDir = QCoreApplication::applicationDirPath();
 206     int binpos = appDir.lastIndexOf("/bin");
 207     if (binpos >= 0) {
 208         appDir.replace(binpos, 4, "/share");
 209         xdgDirs.append(appDir);
 210         // Also append apps/quassel, this is only for QIconLoader to find icons there
 211         xdgDirs.append(appDir + "/apps/quassel");
 212     } else
 213         xdgDirs.append(appDir);  // build directory is always the last fallback
 214
 215     xdgDirs.removeDuplicates();
 216
 217     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 218 #endif
 219 }
 220
 221
 222 void Quassel::setupBuildInfo()
 223 {
 224     BuildInfo buildInfo;
 225     buildInfo.applicationName = "quassel";
 226     buildInfo.coreApplicationName = "quasselcore";
 227     buildInfo.clientApplicationName = "quasselclient";
 228     buildInfo.organizationName = "Quassel Project";
 229     buildInfo.organizationDomain = "quassel-irc.org";
 230
 231     buildInfo.protocolVersion = 10; // FIXME: deprecated, will be removed
 232
 233     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 234     buildInfo.generatedVersion = GIT_DESCRIBE;
 235
 236     // Check if we got a commit hash
 237     if (!QString(GIT_HEAD).isEmpty()) {
 238         buildInfo.commitHash = GIT_HEAD;
 239         // Set to Unix epoch, wrapped as a string for backwards-compatibility
 240         buildInfo.commitDate = QString::number(GIT_COMMIT_DATE);
 241     }
 242     else if (!QString(DIST_HASH).contains("Format")) {
 243         buildInfo.commitHash = DIST_HASH;
 244         // Leave as Unix epoch if set as Unix epoch, but don't force this for
 245         // backwards-compatibility with existing packaging/release tools that might set strings.
 246         buildInfo.commitDate = QString(DIST_DATE);
 247     }
 248
 249     // create a nice version string
 250     if (buildInfo.generatedVersion.isEmpty()) {
 251         if (!buildInfo.commitHash.isEmpty()) {
 252             // dist version
 253             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}
 254                                                .arg(buildInfo.baseVersion)
 255                                                .arg(buildInfo.commitHash.left(7));
 256             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 257                                                .arg(buildInfo.baseVersion)
 258                                                .arg(buildInfo.commitHash.left(7))
 259                                                .arg(buildInfo.commitHash);
 260         }
 261         else {
 262             // we only have a base version :(
 263             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 264         }
 265     }
 266     else {
 267         // analyze what we got from git-describe
 268         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 269         if (rx.exactMatch(buildInfo.generatedVersion)) {
 270             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 271             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 272             if (!buildInfo.commitHash.isEmpty()) {
 273                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 274                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 275             }
 276         }
 277         else {
 278             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 279         }
 280     }
 281     if (buildInfo.fancyVersionString.isEmpty()) {
 282         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 283     }
 284
 285     instance()->_buildInfo = std::move(buildInfo);
 286 }
 287
 288
 289 const Quassel::BuildInfo &Quassel::buildInfo()
 290 {
 291     return instance()->_buildInfo;
 292 }
 293
 294
 295 void Quassel::setupSignalHandling()
 296 {
 297 #ifndef Q_OS_WIN
 298     _signalWatcher = new PosixSignalWatcher(this);
 299 #else
 300     _signalWatcher = new WindowsSignalWatcher(this);
 301 #endif
 302     connect(_signalWatcher, SIGNAL(handleSignal(AbstractSignalWatcher::Action)), this, SLOT(handleSignal(AbstractSignalWatcher::Action)));
 303 }
 304
 305
 306 void Quassel::handleSignal(AbstractSignalWatcher::Action action)
 307 {
 308     switch (action) {
 309     case AbstractSignalWatcher::Action::Reload:
 310         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for graceful reloading of processes.
 311         if (!_reloadHandlers.empty()) {
 312             quInfo() << "Reloading configuration";
 313             if (reloadConfig()) {
 314                 quInfo() << "Successfully reloaded configuration";
 315             }
 316         }
 317         break;
 318     case AbstractSignalWatcher::Action::Terminate:
 319         if (!_quitting) {
 320             quit();
 321         }
 322         else {
 323             quInfo() << "Already shutting down, ignoring signal";
 324         }
 325         break;
 326     case AbstractSignalWatcher::Action::HandleCrash:
 327         logBacktrace(instance()->coreDumpFileName());
 328         exit(EXIT_FAILURE);
 329     }
 330 }
 331
 332
 333 Quassel::RunMode Quassel::runMode() {
 334     return instance()->_runMode;
 335 }
 336
 337
 338 void Quassel::setRunMode(RunMode runMode)
 339 {
 340     instance()->_runMode = runMode;
 341 }
 342
 343
 344 void Quassel::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 345 {
 346     instance()->_cliParser = std::move(parser);
 347 }
 348
 349
 350 QString Quassel::optionValue(const QString &key)
 351 {
 352     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 353 }
 354
 355
 356 bool Quassel::isOptionSet(const QString &key)
 357 {
 358     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 359 }
 360
 361
 362 const QString &Quassel::coreDumpFileName()
 363 {
 364     if (_coreDumpFileName.isEmpty()) {
 365         QDir configDir(configDirPath());
 366         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 367         QFile dumpFile(_coreDumpFileName);
 368         dumpFile.open(QIODevice::Append);
 369         QTextStream dumpStream(&dumpFile);
 370         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 371         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 372         dumpStream.flush();
 373         dumpFile.close();
 374     }
 375     return _coreDumpFileName;
 376 }
 377
 378
 379 QString Quassel::configDirPath()
 380 {
 381     if (!instance()->_configDirPath.isEmpty())
 382         return instance()->_configDirPath;
 383
 384     QString path;
 385     if (isOptionSet("datadir")) {
 386         qWarning() << "Obsolete option --datadir used!";
 387         path = Quassel::optionValue("datadir");
 388     }
 389     else if (isOptionSet("configdir")) {
 390         path = Quassel::optionValue("configdir");
 391     }
 392     else {
 393 #ifdef Q_OS_MAC
 394         // On Mac, the path is always the same
 395         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 396 #else
 397         // We abuse QSettings to find us a sensible path on the other platforms
 398 #  ifdef Q_OS_WIN
 399         // don't use the registry
 400         QSettings::Format format = QSettings::IniFormat;
 401 #  else
 402         QSettings::Format format = QSettings::NativeFormat;
 403 #  endif
 404         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 405         QFileInfo fileInfo(s.fileName());
 406         path = fileInfo.dir().absolutePath();
 407 #endif /* Q_OS_MAC */
 408     }
 409
 410     path = QFileInfo{path}.absoluteFilePath();
 411
 412     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 413         path += QDir::separator();
 414
 415     QDir qDir{path};
 416     if (!qDir.exists(path)) {
 417         if (!qDir.mkpath(path)) {
 418             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 419             return {};
 420         }
 421     }
 422
 423     instance()->_configDirPath = path;
 424     return path;
 425 }
 426
 427
 428 void Quassel::setDataDirPaths(const QStringList &paths) {
 429     instance()->_dataDirPaths = paths;
 430 }
 431
 432
 433 QStringList Quassel::dataDirPaths()
 434 {
 435     return instance()->_dataDirPaths;
 436 }
 437
 438
 439 QStringList Quassel::findDataDirPaths()
 440 {
 441     // TODO Qt5
 442     // We don't use QStandardPaths for now, as we still need to provide fallbacks for Qt4 and
 443     // want to stay consistent.
 444
 445     QStringList dataDirNames;
 446 #ifdef Q_OS_WIN
 447     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 448                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 449                  << QCoreApplication::applicationDirPath();
 450 #elif defined Q_OS_MAC
 451     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 452                  << QCoreApplication::applicationDirPath();
 453 #else
 454     // Linux et al
 455
 456     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 457     // This should thus come first.
 458     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 459     if (xdgDataHome.isEmpty())
 460         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 461     dataDirNames << xdgDataHome;
 462
 463     // Now whatever is configured through XDG_DATA_DIRS
 464     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 465     if (xdgDataDirs.isEmpty())
 466         dataDirNames << "/usr/local/share" << "/usr/share";
 467     else
 468         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 469
 470     // Just in case, also check our install prefix
 471     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 472
 473     // Normalize and append our application name
 474     for (int i = 0; i < dataDirNames.count(); i++)
 475         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 476
 477 #endif
 478
 479     // Add resource path and workdir just in case.
 480     // Workdir should have precedence
 481     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 482     dataDirNames.append(":/data/");
 483
 484     // Append trailing '/' and check for existence
 485     auto iter = dataDirNames.begin();
 486     while (iter != dataDirNames.end()) {
 487         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 488             iter->append(QDir::separator());
 489         if (!QFile::exists(*iter))
 490             iter = dataDirNames.erase(iter);
 491         else
 492             ++iter;
 493     }
 494
 495     dataDirNames.removeDuplicates();
 496
 497     return dataDirNames;
 498 }
 499
 500
 501 QString Quassel::findDataFilePath(const QString &fileName)
 502 {
 503     QStringList dataDirs = dataDirPaths();
 504     foreach(QString dataDir, dataDirs) {
 505         QString path = dataDir + fileName;
 506         if (QFile::exists(path))
 507             return path;
 508     }
 509     return QString();
 510 }
 511
 512
 513 QStringList Quassel::scriptDirPaths()
 514 {
 515     QStringList res(configDirPath() + "scripts/");
 516     foreach(QString path, dataDirPaths())
 517     res << path + "scripts/";
 518     return res;
 519 }
 520
 521
 522 QString Quassel::translationDirPath()
 523 {
 524     if (instance()->_translationDirPath.isEmpty()) {
 525         // We support only one translation dir; fallback mechanisms wouldn't work else.
 526         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 527         foreach(const QString &dir, dataDirPaths()) {
 528             if (QFile::exists(dir + "translations/")) {
 529                 instance()->_translationDirPath = dir + "translations/";
 530                 break;
 531             }
 532         }
 533         if (instance()->_translationDirPath.isEmpty())
 534             instance()->_translationDirPath = ":/i18n/";
 535     }
 536     return instance()->_translationDirPath;
 537 }
 538
 539
 540 void Quassel::loadTranslation(const QLocale &locale)
 541 {
 542     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 543     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 544
 545     if (qtTranslator)
 546         qApp->removeTranslator(qtTranslator);
 547     if (quasselTranslator)
 548         qApp->removeTranslator(quasselTranslator);
 549
 550     // We use QLocale::C to indicate that we don't want a translation
 551     if (locale.language() == QLocale::C)
 552         return;
 553
 554     qtTranslator = new QTranslator(qApp);
 555     qtTranslator->setObjectName("QtTr");
 556     qApp->installTranslator(qtTranslator);
 557
 558     quasselTranslator = new QTranslator(qApp);
 559     quasselTranslator->setObjectName("QuasselTr");
 560     qApp->installTranslator(quasselTranslator);
 561
 562 #if QT_VERSION >= 0x040800 && !defined Q_OS_MAC
 563     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 564     if (!success)
 565         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 566     quasselTranslator->load(locale, QString(""), translationDirPath());
 567 #else
 568     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 569     if (!success)
 570         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 571     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 572 #endif
 573 }
 574
 575
 576 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 577
 578 Quassel::Features::Features()
 579 {
 580     QStringList features;
 581
 582     // TODO Qt5: Use QMetaEnum::fromType()
 583     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 584     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 585 }
 586
 587
 588 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 589 {
 590     // TODO Qt5: Use QMetaEnum::fromType()
 591     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 592     _features.resize(featureEnum.keyCount(), false);
 593
 594     for (auto &&feature : features) {
 595         int i = featureEnum.keyToValue(qPrintable(feature));
 596         if (i >= 0) {
 597             _features[i] = true;
 598         }
 599         else {
 600             _unknownFeatures << feature;
 601         }
 602     }
 603
 604     if (legacyFeatures) {
 605         // TODO Qt5: Use QMetaEnum::fromType()
 606         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 607         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 608             if (static_cast<quint32>(legacyFeatures) & mask) {
 609                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 610                 if (i >= 0) {
 611                     _features[i] = true;
 612                 }
 613             }
 614         }
 615     }
 616 }
 617
 618
 619 bool Quassel::Features::isEnabled(Feature feature) const
 620 {
 621     size_t i = static_cast<size_t>(feature);
 622     return i < _features.size() ? _features[i] : false;
 623 }
 624
 625
 626 QStringList Quassel::Features::toStringList(bool enabled) const
 627 {
 628     // Check if any feature is enabled
 629     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 630         return QStringList{} << "NoFeatures";
 631     }
 632
 633     QStringList result;
 634
 635     // TODO Qt5: Use QMetaEnum::fromType()
 636     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 637     for (quint32 i = 0; i < _features.size(); ++i) {
 638         if (_features[i] == enabled) {
 639             result << featureEnum.key(i);
 640         }
 641     }
 642     return result;
 643 }
 644
 645
 646 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 647 {
 648     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 649     quint32 result{0};
 650     // TODO Qt5: Use QMetaEnum::fromType()
 651     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 652     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 653
 654     for (quint32 i = 0; i < _features.size(); ++i) {
 655         if (_features[i]) {
 656             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 657             if (v >= 0) {
 658                 result |= v;
 659             }
 660         }
 661     }
 662     return static_cast<LegacyFeatures>(result);
 663 }
 664
 665
 666 QStringList Quassel::Features::unknownFeatures() const
 667 {
 668     return _unknownFeatures;
 669 }