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 #include "version.h"
  48
  49 #ifndef Q_OS_WIN
  50 #    include "posixsignalwatcher.h"
  51 #else
  52 #    include "windowssignalwatcher.h"
  53 #endif
  54
  55 Quassel::Quassel()
  56     : Singleton<Quassel>{this}
  57     , _logger{new Logger{this}}
  58 {
  59 #ifdef EMBED_DATA
  60     Q_INIT_RESOURCE(i18n);
  61 #endif
  62 }
  63
  64 void Quassel::init(RunMode runMode)
  65 {
  66     _runMode = runMode;
  67
  68     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
  69
  70     setupSignalHandling();
  71     setupEnvironment();
  72     registerMetaTypes();
  73
  74     // Initial translation (may be overridden in UI settings)
  75     loadTranslation(QLocale::system());
  76
  77     setupCliParser();
  78
  79     // Don't keep a debug log on the core
  80     logger()->setup(runMode != RunMode::CoreOnly);
  81
  82     Network::setDefaultCodecForServer("UTF-8");
  83     Network::setDefaultCodecForEncoding("UTF-8");
  84     Network::setDefaultCodecForDecoding("ISO-8859-15");
  85 }
  86
  87 Logger* Quassel::logger() const
  88 {
  89     return _logger;
  90 }
  91
  92 void Quassel::registerQuitHandler(QuitHandler handler)
  93 {
  94     instance()->_quitHandlers.emplace_back(std::move(handler));
  95 }
  96
  97 void Quassel::quit()
  98 {
  99     // Protect against multiple invocations (e.g. triggered by MainWin::closeEvent())
 100     if (!_quitting) {
 101         _quitting = true;
 102         quInfo() << "Quitting...";
 103         if (_quitHandlers.empty()) {
 104             QCoreApplication::quit();
 105         }
 106         else {
 107             // Note: We expect one of the registered handlers to call QCoreApplication::quit()
 108             for (auto&& handler : _quitHandlers) {
 109                 handler();
 110             }
 111         }
 112     }
 113 }
 114
 115 void Quassel::registerReloadHandler(ReloadHandler handler)
 116 {
 117     instance()->_reloadHandlers.emplace_back(std::move(handler));
 118 }
 119
 120 bool Quassel::reloadConfig()
 121 {
 122     bool result{true};
 123     for (auto&& handler : _reloadHandlers) {
 124         result = result && handler();
 125     }
 126     return result;
 127 }
 128
 129 //! Register our custom types with Qt's Meta Object System.
 130 /**  This makes them available for QVariant and in signals/slots, among other things.
 131  *
 132  */
 133 void Quassel::registerMetaTypes()
 134 {
 135     // Complex types
 136     qRegisterMetaType<Message>("Message");
 137     qRegisterMetaType<BufferInfo>("BufferInfo");
 138     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 139     qRegisterMetaType<Network::Server>("Network::Server");
 140     qRegisterMetaType<Identity>("Identity");
 141
 142     qRegisterMetaTypeStreamOperators<Message>("Message");
 143     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 144     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 145     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 146     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 147
 148     qRegisterMetaType<IdentityId>("IdentityId");
 149     qRegisterMetaType<BufferId>("BufferId");
 150     qRegisterMetaType<NetworkId>("NetworkId");
 151     qRegisterMetaType<UserId>("UserId");
 152     qRegisterMetaType<AccountId>("AccountId");
 153     qRegisterMetaType<MsgId>("MsgId");
 154
 155     qRegisterMetaType<QHostAddress>("QHostAddress");
 156     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 157     qRegisterMetaType<QUuid>("QUuid");
 158     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 159
 160     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 161     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 162     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 163     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 164     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 165     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 166
 167     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 168     qRegisterMetaType<PeerPtr>("PeerPtr");
 169     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 170
 171     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 172     if (!QMetaType::type("QVariant")) {
 173         qRegisterMetaType<QVariant>("QVariant");
 174         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 175     }
 176 }
 177
 178 void Quassel::setupEnvironment()
 179 {
 180     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 181     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 182     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 183     // hack extra search paths into various places.
 184 #ifdef Q_OS_UNIX
 185     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 186     if (xdgDataVar.isEmpty())
 187         xdgDataVar = QLatin1String("/usr/local/share:/usr/share");  // sane defaults
 188
 189     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 190
 191     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 192     QString appDir = QCoreApplication::applicationDirPath();
 193     int binpos = appDir.lastIndexOf("/bin");
 194     if (binpos >= 0) {
 195         appDir.replace(binpos, 4, "/share");
 196         xdgDirs.append(appDir);
 197         // Also append apps/quassel, this is only for QIconLoader to find icons there
 198         xdgDirs.append(appDir + "/apps/quassel");
 199     }
 200     else
 201         xdgDirs.append(appDir);  // build directory is always the last fallback
 202
 203     xdgDirs.removeDuplicates();
 204
 205     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 206 #endif
 207 }
 208
 209 void Quassel::setupBuildInfo()
 210 {
 211     BuildInfo buildInfo;
 212     buildInfo.applicationName = "quassel";
 213     buildInfo.coreApplicationName = "quasselcore";
 214     buildInfo.clientApplicationName = "quasselclient";
 215     buildInfo.organizationName = "Quassel Project";
 216     buildInfo.organizationDomain = "quassel-irc.org";
 217
 218     buildInfo.protocolVersion = 10;  // FIXME: deprecated, will be removed
 219
 220     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 221     buildInfo.generatedVersion = GIT_DESCRIBE;
 222
 223     // Check if we got a commit hash
 224     if (!QString(GIT_HEAD).isEmpty()) {
 225         buildInfo.commitHash = GIT_HEAD;
 226         // Set to Unix epoch, wrapped as a string for backwards-compatibility
 227         buildInfo.commitDate = QString::number(GIT_COMMIT_DATE);
 228     }
 229     else if (!QString(DIST_HASH).contains("Format")) {
 230         buildInfo.commitHash = DIST_HASH;
 231         // Leave as Unix epoch if set as Unix epoch, but don't force this for
 232         // backwards-compatibility with existing packaging/release tools that might set strings.
 233         buildInfo.commitDate = QString(DIST_DATE);
 234     }
 235
 236     // create a nice version string
 237     if (buildInfo.generatedVersion.isEmpty()) {
 238         if (!buildInfo.commitHash.isEmpty()) {
 239             // dist version
 240             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}.arg(buildInfo.baseVersion).arg(buildInfo.commitHash.left(7));
 241             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 242                                                .arg(buildInfo.baseVersion)
 243                                                .arg(buildInfo.commitHash.left(7))
 244                                                .arg(buildInfo.commitHash);
 245         }
 246         else {
 247             // we only have a base version :(
 248             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 249         }
 250     }
 251     else {
 252         // analyze what we got from git-describe
 253         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 254         if (rx.exactMatch(buildInfo.generatedVersion)) {
 255             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 256             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 257             if (!buildInfo.commitHash.isEmpty()) {
 258                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 259                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 260             }
 261         }
 262         else {
 263             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 264         }
 265     }
 266     if (buildInfo.fancyVersionString.isEmpty()) {
 267         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 268     }
 269
 270     instance()->_buildInfo = std::move(buildInfo);
 271 }
 272
 273 const Quassel::BuildInfo& Quassel::buildInfo()
 274 {
 275     return instance()->_buildInfo;
 276 }
 277
 278 void Quassel::setupSignalHandling()
 279 {
 280 #ifndef Q_OS_WIN
 281     _signalWatcher = new PosixSignalWatcher(this);
 282 #else
 283     _signalWatcher = new WindowsSignalWatcher(this);
 284 #endif
 285     connect(_signalWatcher, &AbstractSignalWatcher::handleSignal, this, &Quassel::handleSignal);
 286 }
 287
 288 void Quassel::handleSignal(AbstractSignalWatcher::Action action)
 289 {
 290     switch (action) {
 291     case AbstractSignalWatcher::Action::Reload:
 292         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for graceful reloading of processes.
 293         if (!_reloadHandlers.empty()) {
 294             quInfo() << "Reloading configuration";
 295             if (reloadConfig()) {
 296                 quInfo() << "Successfully reloaded configuration";
 297             }
 298         }
 299         break;
 300     case AbstractSignalWatcher::Action::Terminate:
 301         if (!_quitting) {
 302             quit();
 303         }
 304         else {
 305             quInfo() << "Already shutting down, ignoring signal";
 306         }
 307         break;
 308     case AbstractSignalWatcher::Action::HandleCrash:
 309         logBacktrace(instance()->coreDumpFileName());
 310         exit(EXIT_FAILURE);
 311     }
 312 }
 313
 314 Quassel::RunMode Quassel::runMode()
 315 {
 316     return instance()->_runMode;
 317 }
 318
 319 void Quassel::setupCliParser()
 320 {
 321     QList<QCommandLineOption> options;
 322
 323     // General options
 324     /// @todo Bring back --datadir to specify the database location independent of config
 325     if (runMode() == RunMode::ClientOnly) {
 326         options += {{"c", "configdir"}, tr("Specify the directory holding the client configuration."), tr("path")};
 327     }
 328     else {
 329         options += {{"c", "configdir"},
 330                     tr("Specify the directory holding configuration files, the SQlite database and the SSL certificate."),
 331                     tr("path")};
 332     }
 333
 334     // Client options
 335     if (runMode() != RunMode::CoreOnly) {
 336         options += {
 337             {"icontheme", tr("Override the system icon theme ('breeze' is recommended)."), tr("theme")},
 338             {"qss", tr("Load a custom application stylesheet."), tr("file.qss")},
 339             {"hidewindow", tr("Start the client minimized to the system tray.")},
 340         };
 341     }
 342
 343     // Core options
 344     if (runMode() != RunMode::ClientOnly) {
 345         options += {
 346             {"listen", tr("The address(es) quasselcore will listen on."), tr("<address>[,<address>[,...]]"), "::,0.0.0.0"},
 347             {{"p", "port"}, tr("The port quasselcore will listen at."), tr("port"), "4242"},
 348             {{"n", "norestore"}, tr("Don't restore last core's state.")},
 349             {"config-from-environment", tr("Load configuration from environment variables.")},
 350             {"select-backend", tr("Switch storage backend (migrating data if possible)."), tr("backendidentifier")},
 351             {"select-authenticator", tr("Select authentication backend."), tr("authidentifier")},
 352             {"add-user", tr("Starts an interactive session to add a new core user.")},
 353             {"change-userpass",
 354              tr("Starts an interactive session to change the password of the user identified by <username>."),
 355              tr("username")},
 356             {"strict-ident", tr("Use users' quasselcore username as ident reply. Ignores each user's configured ident setting.")},
 357             {"ident-daemon", tr("Enable internal ident daemon.")},
 358             {"ident-port",
 359              tr("The port quasselcore will listen at for ident requests. Only meaningful with --ident-daemon."),
 360              tr("port"),
 361              "10113"},
 362             {"oidentd", tr("Enable oidentd integration. In most cases you should also enable --strict-ident.")},
 363             {"oidentd-conffile", tr("Set path to oidentd configuration file."), tr("file")},
 364 #ifdef HAVE_SSL
 365             {"require-ssl", tr("Require SSL for remote (non-loopback) client connections.")},
 366             {"ssl-cert", tr("Specify the path to the SSL certificate."), tr("path"), "configdir/quasselCert.pem"},
 367             {"ssl-key", tr("Specify the path to the SSL key."), tr("path"), "ssl-cert-path"},
 368 #endif
 369         };
 370     }
 371
 372     // Logging options
 373     options += {
 374         {{"L", "loglevel"}, tr("Supports one of Debug|Info|Warning|Error; default is Info."), tr("level"), "Info"},
 375         {{"l", "logfile"}, tr("Log to a file."), "path"},
 376 #ifdef HAVE_SYSLOG
 377         {"syslog", tr("Log to syslog.")},
 378 #endif
 379     };
 380
 381     // Debug options
 382     options += {{"d", "debug"}, tr("Enable debug output.")};
 383     if (runMode() != RunMode::CoreOnly) {
 384         options += {
 385             {"debugbufferswitches", tr("Enables debugging for bufferswitches.")},
 386             {"debugmodel", tr("Enables debugging for models.")},
 387         };
 388     }
 389     if (runMode() != RunMode::ClientOnly) {
 390         options += {
 391             {"debug-irc", tr("Enable logging of all raw IRC messages to debug log, including passwords!  In most cases you should also set --loglevel Debug")},
 392             {"debug-irc-id", tr("Limit raw IRC logging to this network ID.  Implies --debug-irc"), tr("database network ID"), "-1"},
 393         };
 394     }
 395
 396     _cliParser.addOptions(options);
 397     _cliParser.addHelpOption();
 398     _cliParser.addVersionOption();
 399     _cliParser.setApplicationDescription(tr("Quassel IRC is a modern, distributed IRC client."));
 400
 401     // This will call ::exit() for --help, --version and in case of errors
 402     _cliParser.process(*QCoreApplication::instance());
 403 }
 404
 405 QString Quassel::optionValue(const QString& key)
 406 {
 407     return instance()->_cliParser.value(key);
 408 }
 409
 410 bool Quassel::isOptionSet(const QString& key)
 411 {
 412     return instance()->_cliParser.isSet(key);
 413 }
 414
 415 const QString& Quassel::coreDumpFileName()
 416 {
 417     if (_coreDumpFileName.isEmpty()) {
 418         QDir configDir(configDirPath());
 419         _coreDumpFileName = configDir.absoluteFilePath(
 420             QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 421         QFile dumpFile(_coreDumpFileName);
 422         dumpFile.open(QIODevice::Append);
 423         QTextStream dumpStream(&dumpFile);
 424         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 425         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 426         dumpStream.flush();
 427         dumpFile.close();
 428     }
 429     return _coreDumpFileName;
 430 }
 431
 432 QString Quassel::configDirPath()
 433 {
 434     if (!instance()->_configDirPath.isEmpty())
 435         return instance()->_configDirPath;
 436
 437     QString path;
 438     if (isOptionSet("configdir")) {
 439         path = Quassel::optionValue("configdir");
 440     }
 441     else {
 442 #ifdef Q_OS_MAC
 443         // On Mac, the path is always the same
 444         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 445 #else
 446         // We abuse QSettings to find us a sensible path on the other platforms
 447 #    ifdef Q_OS_WIN
 448         // don't use the registry
 449         QSettings::Format format = QSettings::IniFormat;
 450 #    else
 451         QSettings::Format format = QSettings::NativeFormat;
 452 #    endif
 453         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 454         QFileInfo fileInfo(s.fileName());
 455         path = fileInfo.dir().absolutePath();
 456 #endif /* Q_OS_MAC */
 457     }
 458
 459     path = QFileInfo{path}.absoluteFilePath();
 460
 461     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 462         path += QDir::separator();
 463
 464     QDir qDir{path};
 465     if (!qDir.exists(path)) {
 466         if (!qDir.mkpath(path)) {
 467             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 468             return {};
 469         }
 470     }
 471
 472     instance()->_configDirPath = path;
 473     return path;
 474 }
 475
 476 QStringList Quassel::dataDirPaths()
 477 {
 478     if (!instance()->_dataDirPaths.isEmpty())
 479         return instance()->_dataDirPaths;
 480
 481     // TODO: Migrate to QStandardPaths (will require moving of the sqlite database,
 482     //       or a fallback for it being in the config dir)
 483
 484     QStringList dataDirNames;
 485 #ifdef Q_OS_WIN
 486     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 487                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain() << QCoreApplication::applicationDirPath();
 488 #elif defined Q_OS_MAC
 489     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/" << QCoreApplication::applicationDirPath();
 490 #else
 491     // Linux et al
 492
 493     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 494     // This should thus come first.
 495     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 496     if (xdgDataHome.isEmpty())
 497         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 498     dataDirNames << xdgDataHome;
 499
 500     // Now whatever is configured through XDG_DATA_DIRS
 501     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 502     if (xdgDataDirs.isEmpty())
 503         dataDirNames << "/usr/local/share"
 504                      << "/usr/share";
 505     else
 506         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 507
 508     // Just in case, also check our install prefix
 509     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 510
 511     // Normalize and append our application name
 512     for (int i = 0; i < dataDirNames.count(); i++)
 513         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 514
 515 #endif
 516
 517     // Add resource path and workdir just in case.
 518     // Workdir should have precedence
 519     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 520     dataDirNames.append(":/data/");
 521
 522     // Append trailing '/' and check for existence
 523     auto iter = dataDirNames.begin();
 524     while (iter != dataDirNames.end()) {
 525         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 526             iter->append(QDir::separator());
 527         if (!QFile::exists(*iter))
 528             iter = dataDirNames.erase(iter);
 529         else
 530             ++iter;
 531     }
 532
 533     dataDirNames.removeDuplicates();
 534
 535     instance()->_dataDirPaths = dataDirNames;
 536     return dataDirNames;
 537 }
 538
 539 QString Quassel::findDataFilePath(const QString& fileName)
 540 {
 541     QStringList dataDirs = dataDirPaths();
 542     foreach (QString dataDir, dataDirs) {
 543         QString path = dataDir + fileName;
 544         if (QFile::exists(path))
 545             return path;
 546     }
 547     return QString();
 548 }
 549
 550 QStringList Quassel::scriptDirPaths()
 551 {
 552     QStringList res(configDirPath() + "scripts/");
 553     foreach (QString path, dataDirPaths())
 554         res << path + "scripts/";
 555     return res;
 556 }
 557
 558 QString Quassel::translationDirPath()
 559 {
 560     if (instance()->_translationDirPath.isEmpty()) {
 561         // We support only one translation dir; fallback mechanisms wouldn't work else.
 562         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 563         foreach (const QString& dir, dataDirPaths()) {
 564             if (QFile::exists(dir + "translations/")) {
 565                 instance()->_translationDirPath = dir + "translations/";
 566                 break;
 567             }
 568         }
 569         if (instance()->_translationDirPath.isEmpty())
 570             instance()->_translationDirPath = ":/i18n/";
 571     }
 572     return instance()->_translationDirPath;
 573 }
 574
 575 void Quassel::loadTranslation(const QLocale& locale)
 576 {
 577     auto* qtTranslator = QCoreApplication::instance()->findChild<QTranslator*>("QtTr");
 578     auto* quasselTranslator = QCoreApplication::instance()->findChild<QTranslator*>("QuasselTr");
 579
 580     if (qtTranslator)
 581         qApp->removeTranslator(qtTranslator);
 582     if (quasselTranslator)
 583         qApp->removeTranslator(quasselTranslator);
 584
 585     // We use QLocale::C to indicate that we don't want a translation
 586     if (locale.language() == QLocale::C)
 587         return;
 588
 589     qtTranslator = new QTranslator(qApp);
 590     qtTranslator->setObjectName("QtTr");
 591
 592     quasselTranslator = new QTranslator(qApp);
 593     quasselTranslator->setObjectName("QuasselTr");
 594
 595 #ifndef Q_OS_MAC
 596     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 597     if (!success)
 598         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 599     quasselTranslator->load(locale, QString(""), translationDirPath());
 600 #else
 601     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 602     if (!success)
 603         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 604     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 605 #endif
 606
 607     qApp->installTranslator(quasselTranslator);
 608     qApp->installTranslator(qtTranslator);
 609 }
 610
 611 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 612
 613 Quassel::Features::Features()
 614 {
 615     QStringList features;
 616
 617     // TODO Qt5: Use QMetaEnum::fromType()
 618     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 619     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 620 }
 621
 622 Quassel::Features::Features(const QStringList& features, LegacyFeatures legacyFeatures)
 623 {
 624     // TODO Qt5: Use QMetaEnum::fromType()
 625     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 626     _features.resize(featureEnum.keyCount(), false);
 627
 628     for (auto&& feature : features) {
 629         int i = featureEnum.keyToValue(qPrintable(feature));
 630         if (i >= 0) {
 631             _features[i] = true;
 632         }
 633         else {
 634             _unknownFeatures << feature;
 635         }
 636     }
 637
 638     if (legacyFeatures) {
 639         // TODO Qt5: Use QMetaEnum::fromType()
 640         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 641         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<= 1) {
 642             if (static_cast<quint32>(legacyFeatures) & mask) {
 643                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 644                 if (i >= 0) {
 645                     _features[i] = true;
 646                 }
 647             }
 648         }
 649     }
 650 }
 651
 652 bool Quassel::Features::isEnabled(Feature feature) const
 653 {
 654     auto i = static_cast<size_t>(feature);
 655     return i < _features.size() ? _features[i] : false;
 656 }
 657
 658 QStringList Quassel::Features::toStringList(bool enabled) const
 659 {
 660     // Check if any feature is enabled
 661     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 662         return QStringList{} << "NoFeatures";
 663     }
 664
 665     QStringList result;
 666
 667     // TODO Qt5: Use QMetaEnum::fromType()
 668     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 669     for (quint32 i = 0; i < _features.size(); ++i) {
 670         if (_features[i] == enabled) {
 671             result << featureEnum.key(i);
 672         }
 673     }
 674     return result;
 675 }
 676
 677 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 678 {
 679     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 680     quint32 result{0};
 681     // TODO Qt5: Use QMetaEnum::fromType()
 682     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 683     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 684
 685     for (quint32 i = 0; i < _features.size(); ++i) {
 686         if (_features[i]) {
 687             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 688             if (v >= 0) {
 689                 result |= v;
 690             }
 691         }
 692     }
 693     return static_cast<LegacyFeatures>(result);
 694 }
 695
 696 QStringList Quassel::Features::unknownFeatures() const
 697 {
 698     return _unknownFeatures;
 699 }