/*
  This file is part of the KDE libraries
  Copyright (c) 1999 Pietro Iglio <iglio@kde.org>
  Copyright (c) 1999 Preston Brown <pbrown@kde.org>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; see the file COPYING.LIB.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.
*/

#include "kdesktopfile.h"

#include <unistd.h>

#include <QtCore/QDir>
#include <QtCore/QFileInfo>

#include "kconfig_p.h"
#include "kdebug.h"
#include "kurl.h"
#include "kconfiggroup.h"
#include "kstandarddirs.h"
#include "kconfigini_p.h"
#include "kde_file.h"

class KDesktopFilePrivate : public KConfigPrivate
{
public:
    KDesktopFilePrivate(const char * resourceType, const QString &fileName);
    KConfigGroup desktopGroup;
};

KDesktopFilePrivate::KDesktopFilePrivate(const char * resourceType, const QString &fileName)
    : KConfigPrivate(KGlobal::mainComponent(), KConfig::NoGlobals, resourceType)
{
    mBackend = new KConfigIniBackend();
    changeFileName(fileName, resourceType);
}

KDesktopFile::KDesktopFile(const char * resourceType, const QString &fileName)
    : KConfig(*new KDesktopFilePrivate(resourceType, fileName))
{
    Q_D(KDesktopFile);
    reparseConfiguration();
    d->desktopGroup = KConfigGroup(this, "Desktop Entry");
}

KDesktopFile::KDesktopFile(const QString &fileName)
    : KConfig(*new KDesktopFilePrivate("xdgdata-apps", fileName))
{
    Q_D(KDesktopFile);
    reparseConfiguration();
    d->desktopGroup = KConfigGroup(this, "Desktop Entry");
}

KDesktopFile::~KDesktopFile()
{
}

KConfigGroup KDesktopFile::desktopGroup() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup;
}

QString KDesktopFile::locateLocal(const QString &path)
{
    QString local;
    if (path.endsWith(QLatin1String(".directory"))) {
        // XDG Desktop menu items come with absolute paths, we need to
        // extract their relative path and then build a local path.
        local = KGlobal::dirs()->relativeLocation("xdgdata-dirs", path);
        if (!QDir::isRelativePath(local)) {
            // Hm, that didn't work...
            // What now? Use filename only and hope for the best.
            local = path.mid(path.lastIndexOf(QLatin1Char('/'))+1);
        }
        local = KStandardDirs::locateLocal("xdgdata-dirs", local);
    } else {
        // XDG Desktop menu items come with absolute paths, we need to
        // extract their relative path and then build a local path.
        local = KGlobal::dirs()->relativeLocation("xdgdata-apps", path);
        if (!QDir::isRelativePath(local)) {
            // What now? Use filename only and hope for the best.
            local = path.mid(path.lastIndexOf(QLatin1Char('/'))+1);
        }
        local = KStandardDirs::locateLocal("xdgdata-apps", local);
    }
    return local;
}

bool KDesktopFile::isDesktopFile(const QString& path)
{
    return (path.length() > 8 && path.endsWith(QLatin1String(".desktop")));
}

bool KDesktopFile::isAuthorizedDesktopFile(const QString& path)
{
    if (path.isEmpty())
        return false; // Empty paths are not ok.

    if (QDir::isRelativePath(path))
        return true; // Relative paths are ok.

    KStandardDirs *dirs = KGlobal::dirs();
    QStringList kdePrefixes = dirs->resourceDirs("services");
    kdePrefixes += dirs->resourceDirs("xdgdata-apps");
    kdePrefixes += dirs->resourceDirs("autostart");

    const QString realPath = KGlobal::dirs()->realPath(path);

    // Check if the .desktop file is installed as part of KDE or XDG.
    foreach (const QString &prefix, kdePrefixes) {
        if (realPath.startsWith(prefix)) {
            return true;
        }
    }

    // Not otherwise permitted, so only allow if the file is executable, or if
    // owned by root (uid == 0)
    QFileInfo entryInfo( path );
    if (entryInfo.isExecutable() || entryInfo.ownerId() == 0) {
        return true;
    }

    kWarning() << "Access to '" << path << "' denied, not owned by root, executable flag not set.";
    return false;
}

QString KDesktopFile::readType() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("Type", QString());
}

QString KDesktopFile::readIcon() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("Icon", QString());
}

QString KDesktopFile::readName() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("Name", QString());
}

QString KDesktopFile::readComment() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("Comment", QString());
}

QString KDesktopFile::readGenericName() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("GenericName", QString());
}

QString KDesktopFile::readPath() const
{
    Q_D(const KDesktopFile);
    // NOT readPathEntry, it is not XDG-compliant. Path entries written by
    // KDE4 will be still treated as such, though.
    return d->desktopGroup.readEntry("Path", QString());
}

QString KDesktopFile::readDevice() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("Dev", QString());
}

QString KDesktopFile::readUrl() const
{
    Q_D(const KDesktopFile);
    if (hasDeviceType()) {
        return d->desktopGroup.readEntry("MountPoint", QString());
    } else {
        // NOT readPathEntry (see readPath())
        QString url = d->desktopGroup.readEntry("URL", QString());
        if (!url.isEmpty() && !QDir::isRelativePath(url)) {
            // Handle absolute paths as such (i.e. we need to escape them)
            return KUrl(url).url();
        }
        return url;
    }
}

QStringList KDesktopFile::readActions() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readXdgListEntry("Actions");
}

KConfigGroup KDesktopFile::actionGroup(const QString& group) const
{
    return KConfigGroup(this, QString::fromLatin1("Desktop Action ") + group);
}

bool KDesktopFile::hasActionGroup(const QString &group) const
{
    return hasGroup(QByteArray("Desktop Action ") + group.toUtf8());
}

bool KDesktopFile::hasLinkType() const
{
    return readType() == QLatin1String("Link");
}

bool KDesktopFile::hasApplicationType() const
{
    return readType() == QLatin1String("Application");
}

bool KDesktopFile::hasMimeTypeType() const
{
    return readType() == QLatin1String("MimeType");
}

bool KDesktopFile::hasDeviceType() const
{
    return readType() == QLatin1String("FSDevice");
}

bool KDesktopFile::tryExec() const
{
    Q_D(const KDesktopFile);
    // Test for TryExec
    // NOT readPathEntry (see readPath())
    const QString te = d->desktopGroup.readEntry("TryExec", QString());

    if (!te.isEmpty() && KGlobal::dirs()->findExe(te).isEmpty()) {
        return false;
    }

    return true;
}

QStringList KDesktopFile::sortOrder() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readEntry("SortOrder", QStringList());
}

QString KDesktopFile::readDocPath() const
{
    Q_D(const KDesktopFile);
    return d->desktopGroup.readPathEntry( "X-DocPath", QString());
}

KDesktopFile* KDesktopFile::copyTo(const QString &file) const
{
    KDesktopFile *config = new KDesktopFile(QString());
    this->KConfig::copyTo(file, config);
    // config->setDesktopGroup();
    return config;
}

const char *KDesktopFile::resource() const
{
    Q_D(const KDesktopFile);
    return d->resourceType;
}

QString KDesktopFile::fileName() const
{
    return name();
}

bool KDesktopFile::noDisplay() const
{
    Q_D(const KDesktopFile);
    if (d->desktopGroup.readEntry("NoDisplay", false)) {
        return true;
    }
    if (d->desktopGroup.hasKey("OnlyShowIn")) {
        if (!d->desktopGroup.readXdgListEntry("OnlyShowIn").contains(QLatin1String("KDE")))
            return true;
    }
    if (d->desktopGroup.hasKey("NotShowIn")) {
        if (d->desktopGroup.readXdgListEntry("NotShowIn").contains(QLatin1String("KDE")))
            return true;
    }
    return false;
}