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 void Quassel::init(RunMode runMode)
  64 {
  65     _runMode = runMode;
  66
  67     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
  68
  69     setupSignalHandling();
  70     setupEnvironment();
  71     registerMetaTypes();
  72
  73     // Initial translation (may be overridden in UI settings)
  74     loadTranslation(QLocale::system());
  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;
  83     }
  84
  85     if (isOptionSet("version")) {
  86         std::cout << qPrintable("Quassel IRC: " + Quassel::buildInfo().plainVersionString) << std::endl;
  87         return;
  88     }
  89
  90     // Don't keep a debug log on the core
  91     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::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 339 {
 340     instance()->_cliParser = std::move(parser);
 341 }
 342
 343
 344 QString Quassel::optionValue(const QString &key)
 345 {
 346     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 347 }
 348
 349
 350 bool Quassel::isOptionSet(const QString &key)
 351 {
 352     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 353 }
 354
 355
 356 const QString &Quassel::coreDumpFileName()
 357 {
 358     if (_coreDumpFileName.isEmpty()) {
 359         QDir configDir(configDirPath());
 360         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 361         QFile dumpFile(_coreDumpFileName);
 362         dumpFile.open(QIODevice::Append);
 363         QTextStream dumpStream(&dumpFile);
 364         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 365         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 366         dumpStream.flush();
 367         dumpFile.close();
 368     }
 369     return _coreDumpFileName;
 370 }
 371
 372
 373 QString Quassel::configDirPath()
 374 {
 375     if (!instance()->_configDirPath.isEmpty())
 376         return instance()->_configDirPath;
 377
 378     QString path;
 379     if (isOptionSet("datadir")) {
 380         qWarning() << "Obsolete option --datadir used!";
 381         path = Quassel::optionValue("datadir");
 382     }
 383     else if (isOptionSet("configdir")) {
 384         path = Quassel::optionValue("configdir");
 385     }
 386     else {
 387 #ifdef Q_OS_MAC
 388         // On Mac, the path is always the same
 389         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 390 #else
 391         // We abuse QSettings to find us a sensible path on the other platforms
 392 #  ifdef Q_OS_WIN
 393         // don't use the registry
 394         QSettings::Format format = QSettings::IniFormat;
 395 #  else
 396         QSettings::Format format = QSettings::NativeFormat;
 397 #  endif
 398         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 399         QFileInfo fileInfo(s.fileName());
 400         path = fileInfo.dir().absolutePath();
 401 #endif /* Q_OS_MAC */
 402     }
 403
 404     path = QFileInfo{path}.absoluteFilePath();
 405
 406     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 407         path += QDir::separator();
 408
 409     QDir qDir{path};
 410     if (!qDir.exists(path)) {
 411         if (!qDir.mkpath(path)) {
 412             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 413             return {};
 414         }
 415     }
 416
 417     instance()->_configDirPath = path;
 418     return path;
 419 }
 420
 421
 422 QStringList Quassel::dataDirPaths()
 423 {
 424     if (!instance()->_dataDirPaths.isEmpty())
 425         return instance()->_dataDirPaths;
 426
 427     // TODO: Migrate to QStandardPaths (will require moving of the sqlite database,
 428     //       or a fallback for it being in the config dir)
 429
 430     QStringList dataDirNames;
 431 #ifdef Q_OS_WIN
 432     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 433                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 434                  << QCoreApplication::applicationDirPath();
 435 #elif defined Q_OS_MAC
 436     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 437                  << QCoreApplication::applicationDirPath();
 438 #else
 439     // Linux et al
 440
 441     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 442     // This should thus come first.
 443     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 444     if (xdgDataHome.isEmpty())
 445         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 446     dataDirNames << xdgDataHome;
 447
 448     // Now whatever is configured through XDG_DATA_DIRS
 449     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 450     if (xdgDataDirs.isEmpty())
 451         dataDirNames << "/usr/local/share" << "/usr/share";
 452     else
 453         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 454
 455     // Just in case, also check our install prefix
 456     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 457
 458     // Normalize and append our application name
 459     for (int i = 0; i < dataDirNames.count(); i++)
 460         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 461
 462 #endif
 463
 464     // Add resource path and workdir just in case.
 465     // Workdir should have precedence
 466     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 467     dataDirNames.append(":/data/");
 468
 469     // Append trailing '/' and check for existence
 470     auto iter = dataDirNames.begin();
 471     while (iter != dataDirNames.end()) {
 472         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 473             iter->append(QDir::separator());
 474         if (!QFile::exists(*iter))
 475             iter = dataDirNames.erase(iter);
 476         else
 477             ++iter;
 478     }
 479
 480     dataDirNames.removeDuplicates();
 481
 482     instance()->_dataDirPaths = dataDirNames;
 483     return dataDirNames;
 484 }
 485
 486
 487 QString Quassel::findDataFilePath(const QString &fileName)
 488 {
 489     QStringList dataDirs = dataDirPaths();
 490     foreach(QString dataDir, dataDirs) {
 491         QString path = dataDir + fileName;
 492         if (QFile::exists(path))
 493             return path;
 494     }
 495     return QString();
 496 }
 497
 498
 499 QStringList Quassel::scriptDirPaths()
 500 {
 501     QStringList res(configDirPath() + "scripts/");
 502     foreach(QString path, dataDirPaths())
 503     res << path + "scripts/";
 504     return res;
 505 }
 506
 507
 508 QString Quassel::translationDirPath()
 509 {
 510     if (instance()->_translationDirPath.isEmpty()) {
 511         // We support only one translation dir; fallback mechanisms wouldn't work else.
 512         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 513         foreach(const QString &dir, dataDirPaths()) {
 514             if (QFile::exists(dir + "translations/")) {
 515                 instance()->_translationDirPath = dir + "translations/";
 516                 break;
 517             }
 518         }
 519         if (instance()->_translationDirPath.isEmpty())
 520             instance()->_translationDirPath = ":/i18n/";
 521     }
 522     return instance()->_translationDirPath;
 523 }
 524
 525
 526 void Quassel::loadTranslation(const QLocale &locale)
 527 {
 528     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 529     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 530
 531     if (qtTranslator)
 532         qApp->removeTranslator(qtTranslator);
 533     if (quasselTranslator)
 534         qApp->removeTranslator(quasselTranslator);
 535
 536     // We use QLocale::C to indicate that we don't want a translation
 537     if (locale.language() == QLocale::C)
 538         return;
 539
 540     qtTranslator = new QTranslator(qApp);
 541     qtTranslator->setObjectName("QtTr");
 542
 543     quasselTranslator = new QTranslator(qApp);
 544     quasselTranslator->setObjectName("QuasselTr");
 545
 546 #ifndef Q_OS_MAC
 547     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 548     if (!success)
 549         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 550     quasselTranslator->load(locale, QString(""), translationDirPath());
 551 #else
 552     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 553     if (!success)
 554         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 555     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 556 #endif
 557
 558     qApp->installTranslator(quasselTranslator);
 559     qApp->installTranslator(qtTranslator);
 560 }
 561
 562
 563 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 564
 565 Quassel::Features::Features()
 566 {
 567     QStringList features;
 568
 569     // TODO Qt5: Use QMetaEnum::fromType()
 570     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 571     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 572 }
 573
 574
 575 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 576 {
 577     // TODO Qt5: Use QMetaEnum::fromType()
 578     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 579     _features.resize(featureEnum.keyCount(), false);
 580
 581     for (auto &&feature : features) {
 582         int i = featureEnum.keyToValue(qPrintable(feature));
 583         if (i >= 0) {
 584             _features[i] = true;
 585         }
 586         else {
 587             _unknownFeatures << feature;
 588         }
 589     }
 590
 591     if (legacyFeatures) {
 592         // TODO Qt5: Use QMetaEnum::fromType()
 593         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 594         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 595             if (static_cast<quint32>(legacyFeatures) & mask) {
 596                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 597                 if (i >= 0) {
 598                     _features[i] = true;
 599                 }
 600             }
 601         }
 602     }
 603 }
 604
 605
 606 bool Quassel::Features::isEnabled(Feature feature) const
 607 {
 608     size_t i = static_cast<size_t>(feature);
 609     return i < _features.size() ? _features[i] : false;
 610 }
 611
 612
 613 QStringList Quassel::Features::toStringList(bool enabled) const
 614 {
 615     // Check if any feature is enabled
 616     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 617         return QStringList{} << "NoFeatures";
 618     }
 619
 620     QStringList result;
 621
 622     // TODO Qt5: Use QMetaEnum::fromType()
 623     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 624     for (quint32 i = 0; i < _features.size(); ++i) {
 625         if (_features[i] == enabled) {
 626             result << featureEnum.key(i);
 627         }
 628     }
 629     return result;
 630 }
 631
 632
 633 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 634 {
 635     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 636     quint32 result{0};
 637     // TODO Qt5: Use QMetaEnum::fromType()
 638     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 639     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 640
 641     for (quint32 i = 0; i < _features.size(); ++i) {
 642         if (_features[i]) {
 643             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 644             if (v >= 0) {
 645                 result |= v;
 646             }
 647         }
 648     }
 649     return static_cast<LegacyFeatures>(result);
 650 }
 651
 652
 653 QStringList Quassel::Features::unknownFeatures() const
 654 {
 655     return _unknownFeatures;
 656 }