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 "logmessage.h"
  48 #include "message.h"
  49 #include "network.h"
  50 #include "peer.h"
  51 #include "protocol.h"
  52 #include "syncableobject.h"
  53 #include "types.h"
  54
  55 #include "../../version.h"
  56
  57 Quassel::Quassel()
  58     : Singleton<Quassel>{this}
  59     , _logger{new Logger{this}}
  60 {
  61 }
  62
  63
  64 bool Quassel::init()
  65 {
  66     if (instance()->_initialized)
  67         return true;  // allow multiple invocations because of MonolithicApplication
  68
  69     // Setup signal handling
  70     // TODO: Don't use unsafe methods, see handleSignal()
  71
  72     // We catch SIGTERM and SIGINT (caused by Ctrl+C) to graceful shutdown Quassel.
  73     signal(SIGTERM, handleSignal);
  74     signal(SIGINT, handleSignal);
  75 #ifndef Q_OS_WIN
  76     // SIGHUP is used to reload configuration (i.e. SSL certificates)
  77     // Windows does not support SIGHUP
  78     signal(SIGHUP, handleSignal);
  79 #endif
  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("UTF-8");
 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     // Don't keep a debug log on the core
 122     return instance()->logger()->setup(runMode() != RunMode::CoreOnly);
 123 }
 124
 125
 126 Logger *Quassel::logger() const
 127 {
 128     return _logger;
 129 }
 130
 131
 132 void Quassel::registerQuitHandler(QuitHandler handler)
 133 {
 134     instance()->_quitHandlers.emplace_back(std::move(handler));
 135 }
 136
 137 void Quassel::quit()
 138 {
 139     if (_quitHandlers.empty()) {
 140         QCoreApplication::quit();
 141     }
 142     else {
 143         for (auto &&handler : _quitHandlers) {
 144             handler();
 145         }
 146     }
 147 }
 148
 149
 150 void Quassel::registerReloadHandler(ReloadHandler handler)
 151 {
 152     instance()->_reloadHandlers.emplace_back(std::move(handler));
 153 }
 154
 155
 156 bool Quassel::reloadConfig()
 157 {
 158     bool result{true};
 159     for (auto &&handler : _reloadHandlers) {
 160         result = result && handler();
 161     }
 162     return result;
 163 }
 164
 165
 166 //! Register our custom types with Qt's Meta Object System.
 167 /**  This makes them available for QVariant and in signals/slots, among other things.
 168 *
 169 */
 170 void Quassel::registerMetaTypes()
 171 {
 172     // Complex types
 173     qRegisterMetaType<Message>("Message");
 174     qRegisterMetaType<BufferInfo>("BufferInfo");
 175     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 176     qRegisterMetaType<Network::Server>("Network::Server");
 177     qRegisterMetaType<Identity>("Identity");
 178
 179     qRegisterMetaTypeStreamOperators<Message>("Message");
 180     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 181     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 182     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 183     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 184
 185     qRegisterMetaType<IdentityId>("IdentityId");
 186     qRegisterMetaType<BufferId>("BufferId");
 187     qRegisterMetaType<NetworkId>("NetworkId");
 188     qRegisterMetaType<UserId>("UserId");
 189     qRegisterMetaType<AccountId>("AccountId");
 190     qRegisterMetaType<MsgId>("MsgId");
 191
 192     qRegisterMetaType<QHostAddress>("QHostAddress");
 193     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 194     qRegisterMetaType<QUuid>("QUuid");
 195     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 196
 197     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 198     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 199     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 200     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 201     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 202     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 203
 204     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 205     qRegisterMetaType<PeerPtr>("PeerPtr");
 206     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 207
 208     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 209     if (!QMetaType::type("QVariant")) {
 210         qRegisterMetaType<QVariant>("QVariant");
 211         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 212     }
 213 }
 214
 215
 216 void Quassel::setupEnvironment()
 217 {
 218     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 219     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 220     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 221     // hack extra search paths into various places.
 222 #ifdef Q_OS_UNIX
 223     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 224     if (xdgDataVar.isEmpty())
 225         xdgDataVar = QLatin1String("/usr/local/share:/usr/share"); // sane defaults
 226
 227     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 228
 229     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 230     QString appDir = QCoreApplication::applicationDirPath();
 231     int binpos = appDir.lastIndexOf("/bin");
 232     if (binpos >= 0) {
 233         appDir.replace(binpos, 4, "/share");
 234         xdgDirs.append(appDir);
 235         // Also append apps/quassel, this is only for QIconLoader to find icons there
 236         xdgDirs.append(appDir + "/apps/quassel");
 237     } else
 238         xdgDirs.append(appDir);  // build directory is always the last fallback
 239
 240     xdgDirs.removeDuplicates();
 241
 242     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 243 #endif
 244 }
 245
 246
 247 void Quassel::setupBuildInfo()
 248 {
 249     BuildInfo buildInfo;
 250     buildInfo.applicationName = "quassel";
 251     buildInfo.coreApplicationName = "quasselcore";
 252     buildInfo.clientApplicationName = "quasselclient";
 253     buildInfo.organizationName = "Quassel Project";
 254     buildInfo.organizationDomain = "quassel-irc.org";
 255
 256     buildInfo.protocolVersion = 10; // FIXME: deprecated, will be removed
 257
 258     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 259     buildInfo.generatedVersion = GIT_DESCRIBE;
 260
 261     // Check if we got a commit hash
 262     if (!QString(GIT_HEAD).isEmpty()) {
 263         buildInfo.commitHash = GIT_HEAD;
 264         // Set to Unix epoch, wrapped as a string for backwards-compatibility
 265         buildInfo.commitDate = QString::number(GIT_COMMIT_DATE);
 266     }
 267     else if (!QString(DIST_HASH).contains("Format")) {
 268         buildInfo.commitHash = DIST_HASH;
 269         // Leave as Unix epoch if set as Unix epoch, but don't force this for
 270         // backwards-compatibility with existing packaging/release tools that might set strings.
 271         buildInfo.commitDate = QString(DIST_DATE);
 272     }
 273
 274     // create a nice version string
 275     if (buildInfo.generatedVersion.isEmpty()) {
 276         if (!buildInfo.commitHash.isEmpty()) {
 277             // dist version
 278             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}
 279                                                .arg(buildInfo.baseVersion)
 280                                                .arg(buildInfo.commitHash.left(7));
 281             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 282                                                .arg(buildInfo.baseVersion)
 283                                                .arg(buildInfo.commitHash.left(7))
 284                                                .arg(buildInfo.commitHash);
 285         }
 286         else {
 287             // we only have a base version :(
 288             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 289         }
 290     }
 291     else {
 292         // analyze what we got from git-describe
 293         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 294         if (rx.exactMatch(buildInfo.generatedVersion)) {
 295             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 296             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 297             if (!buildInfo.commitHash.isEmpty()) {
 298                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 299                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 300             }
 301         }
 302         else {
 303             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 304         }
 305     }
 306     if (buildInfo.fancyVersionString.isEmpty()) {
 307         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 308     }
 309
 310     instance()->_buildInfo = std::move(buildInfo);
 311 }
 312
 313
 314 const Quassel::BuildInfo &Quassel::buildInfo()
 315 {
 316     return instance()->_buildInfo;
 317 }
 318
 319
 320 //! Signal handler for graceful shutdown.
 321 //! @todo: Ensure this doesn't use unsafe methods (it does currently)
 322 //!        cf. QSocketNotifier, UnixSignalWatcher
 323 void Quassel::handleSignal(int sig)
 324 {
 325     switch (sig) {
 326     case SIGTERM:
 327     case SIGINT:
 328         qWarning("%s", qPrintable(QString("Caught signal %1 - exiting.").arg(sig)));
 329         instance()->quit();
 330         break;
 331 #ifndef Q_OS_WIN
 332 // Windows does not support SIGHUP
 333     case SIGHUP:
 334         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for
 335         // graceful reloading of processes.
 336         quInfo() << "Caught signal" << SIGHUP << "- reloading configuration";
 337         if (instance()->reloadConfig()) {
 338             quInfo() << "Successfully reloaded configuration";
 339         }
 340         break;
 341 #endif
 342     case SIGABRT:
 343     case SIGSEGV:
 344 #ifndef Q_OS_WIN
 345     case SIGBUS:
 346 #endif
 347         instance()->logBacktrace(instance()->coreDumpFileName());
 348         exit(EXIT_FAILURE);
 349     default:
 350         ;
 351     }
 352 }
 353
 354
 355 void Quassel::disableCrashHandler()
 356 {
 357     instance()->_handleCrashes = false;
 358 }
 359
 360
 361 Quassel::RunMode Quassel::runMode() {
 362     return instance()->_runMode;
 363 }
 364
 365
 366 void Quassel::setRunMode(RunMode runMode)
 367 {
 368     instance()->_runMode = runMode;
 369 }
 370
 371
 372 void Quassel::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 373 {
 374     instance()->_cliParser = std::move(parser);
 375 }
 376
 377
 378 QString Quassel::optionValue(const QString &key)
 379 {
 380     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 381 }
 382
 383
 384 bool Quassel::isOptionSet(const QString &key)
 385 {
 386     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 387 }
 388
 389
 390 const QString &Quassel::coreDumpFileName()
 391 {
 392     if (_coreDumpFileName.isEmpty()) {
 393         QDir configDir(configDirPath());
 394         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 395         QFile dumpFile(_coreDumpFileName);
 396         dumpFile.open(QIODevice::Append);
 397         QTextStream dumpStream(&dumpFile);
 398         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 399         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 400         dumpStream.flush();
 401         dumpFile.close();
 402     }
 403     return _coreDumpFileName;
 404 }
 405
 406
 407 QString Quassel::configDirPath()
 408 {
 409     if (!instance()->_configDirPath.isEmpty())
 410         return instance()->_configDirPath;
 411
 412     QString path;
 413     if (isOptionSet("datadir")) {
 414         qWarning() << "Obsolete option --datadir used!";
 415         path = Quassel::optionValue("datadir");
 416     }
 417     else if (isOptionSet("configdir")) {
 418         path = Quassel::optionValue("configdir");
 419     }
 420     else {
 421 #ifdef Q_OS_MAC
 422         // On Mac, the path is always the same
 423         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 424 #else
 425         // We abuse QSettings to find us a sensible path on the other platforms
 426 #  ifdef Q_OS_WIN
 427         // don't use the registry
 428         QSettings::Format format = QSettings::IniFormat;
 429 #  else
 430         QSettings::Format format = QSettings::NativeFormat;
 431 #  endif
 432         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 433         QFileInfo fileInfo(s.fileName());
 434         path = fileInfo.dir().absolutePath();
 435 #endif /* Q_OS_MAC */
 436     }
 437
 438     path = QFileInfo{path}.absoluteFilePath();
 439
 440     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 441         path += QDir::separator();
 442
 443     QDir qDir{path};
 444     if (!qDir.exists(path)) {
 445         if (!qDir.mkpath(path)) {
 446             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 447             return {};
 448         }
 449     }
 450
 451     instance()->_configDirPath = path;
 452     return path;
 453 }
 454
 455
 456 void Quassel::setDataDirPaths(const QStringList &paths) {
 457     instance()->_dataDirPaths = paths;
 458 }
 459
 460
 461 QStringList Quassel::dataDirPaths()
 462 {
 463     return instance()->_dataDirPaths;
 464 }
 465
 466
 467 QStringList Quassel::findDataDirPaths()
 468 {
 469     // TODO Qt5
 470     // We don't use QStandardPaths for now, as we still need to provide fallbacks for Qt4 and
 471     // want to stay consistent.
 472
 473     QStringList dataDirNames;
 474 #ifdef Q_OS_WIN
 475     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 476                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 477                  << QCoreApplication::applicationDirPath();
 478 #elif defined Q_OS_MAC
 479     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 480                  << QCoreApplication::applicationDirPath();
 481 #else
 482     // Linux et al
 483
 484     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 485     // This should thus come first.
 486     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 487     if (xdgDataHome.isEmpty())
 488         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 489     dataDirNames << xdgDataHome;
 490
 491     // Now whatever is configured through XDG_DATA_DIRS
 492     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 493     if (xdgDataDirs.isEmpty())
 494         dataDirNames << "/usr/local/share" << "/usr/share";
 495     else
 496         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 497
 498     // Just in case, also check our install prefix
 499     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 500
 501     // Normalize and append our application name
 502     for (int i = 0; i < dataDirNames.count(); i++)
 503         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 504
 505 #endif
 506
 507     // Add resource path and workdir just in case.
 508     // Workdir should have precedence
 509     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 510     dataDirNames.append(":/data/");
 511
 512     // Append trailing '/' and check for existence
 513     auto iter = dataDirNames.begin();
 514     while (iter != dataDirNames.end()) {
 515         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 516             iter->append(QDir::separator());
 517         if (!QFile::exists(*iter))
 518             iter = dataDirNames.erase(iter);
 519         else
 520             ++iter;
 521     }
 522
 523     dataDirNames.removeDuplicates();
 524
 525     return dataDirNames;
 526 }
 527
 528
 529 QString Quassel::findDataFilePath(const QString &fileName)
 530 {
 531     QStringList dataDirs = dataDirPaths();
 532     foreach(QString dataDir, dataDirs) {
 533         QString path = dataDir + fileName;
 534         if (QFile::exists(path))
 535             return path;
 536     }
 537     return QString();
 538 }
 539
 540
 541 QStringList Quassel::scriptDirPaths()
 542 {
 543     QStringList res(configDirPath() + "scripts/");
 544     foreach(QString path, dataDirPaths())
 545     res << path + "scripts/";
 546     return res;
 547 }
 548
 549
 550 QString Quassel::translationDirPath()
 551 {
 552     if (instance()->_translationDirPath.isEmpty()) {
 553         // We support only one translation dir; fallback mechanisms wouldn't work else.
 554         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 555         foreach(const QString &dir, dataDirPaths()) {
 556             if (QFile::exists(dir + "translations/")) {
 557                 instance()->_translationDirPath = dir + "translations/";
 558                 break;
 559             }
 560         }
 561         if (instance()->_translationDirPath.isEmpty())
 562             instance()->_translationDirPath = ":/i18n/";
 563     }
 564     return instance()->_translationDirPath;
 565 }
 566
 567
 568 void Quassel::loadTranslation(const QLocale &locale)
 569 {
 570     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 571     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 572
 573     if (qtTranslator)
 574         qApp->removeTranslator(qtTranslator);
 575     if (quasselTranslator)
 576         qApp->removeTranslator(quasselTranslator);
 577
 578     // We use QLocale::C to indicate that we don't want a translation
 579     if (locale.language() == QLocale::C)
 580         return;
 581
 582     qtTranslator = new QTranslator(qApp);
 583     qtTranslator->setObjectName("QtTr");
 584     qApp->installTranslator(qtTranslator);
 585
 586     quasselTranslator = new QTranslator(qApp);
 587     quasselTranslator->setObjectName("QuasselTr");
 588     qApp->installTranslator(quasselTranslator);
 589
 590 #if QT_VERSION >= 0x040800 && !defined Q_OS_MAC
 591     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 592     if (!success)
 593         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 594     quasselTranslator->load(locale, QString(""), translationDirPath());
 595 #else
 596     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 597     if (!success)
 598         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 599     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 600 #endif
 601 }
 602
 603
 604 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 605
 606 Quassel::Features::Features()
 607 {
 608     QStringList features;
 609
 610     // TODO Qt5: Use QMetaEnum::fromType()
 611     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 612     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 613 }
 614
 615
 616 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 617 {
 618     // TODO Qt5: Use QMetaEnum::fromType()
 619     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 620     _features.resize(featureEnum.keyCount(), false);
 621
 622     for (auto &&feature : features) {
 623         int i = featureEnum.keyToValue(qPrintable(feature));
 624         if (i >= 0) {
 625             _features[i] = true;
 626         }
 627         else {
 628             _unknownFeatures << feature;
 629         }
 630     }
 631
 632     if (legacyFeatures) {
 633         // TODO Qt5: Use QMetaEnum::fromType()
 634         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 635         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 636             if (static_cast<quint32>(legacyFeatures) & mask) {
 637                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 638                 if (i >= 0) {
 639                     _features[i] = true;
 640                 }
 641             }
 642         }
 643     }
 644 }
 645
 646
 647 bool Quassel::Features::isEnabled(Feature feature) const
 648 {
 649     size_t i = static_cast<size_t>(feature);
 650     return i < _features.size() ? _features[i] : false;
 651 }
 652
 653
 654 QStringList Quassel::Features::toStringList(bool enabled) const
 655 {
 656     // Check if any feature is enabled
 657     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 658         return QStringList{} << "NoFeatures";
 659     }
 660
 661     QStringList result;
 662
 663     // TODO Qt5: Use QMetaEnum::fromType()
 664     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 665     for (quint32 i = 0; i < _features.size(); ++i) {
 666         if (_features[i] == enabled) {
 667             result << featureEnum.key(i);
 668         }
 669     }
 670     return result;
 671 }
 672
 673
 674 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 675 {
 676     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 677     quint32 result{0};
 678     // TODO Qt5: Use QMetaEnum::fromType()
 679     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 680     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 681
 682     for (quint32 i = 0; i < _features.size(); ++i) {
 683         if (_features[i]) {
 684             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 685             if (v >= 0) {
 686                 result |= v;
 687             }
 688         }
 689     }
 690     return static_cast<LegacyFeatures>(result);
 691 }
 692
 693
 694 QStringList Quassel::Features::unknownFeatures() const
 695 {
 696     return _unknownFeatures;
 697 }