/*
 * This file is part of the KDE Libraries
 * Copyright (C) 2000 Espen Sand (espen@kde.org)
 * Copyright (C) 2008 Friedrich W. H. Kossebau <kossebau@kde.org>
 * Copyright (C) 2010 Teo Mrnjavac <teo@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.
 *
 */

#ifndef KABOUTDATA_H
#define KABOUTDATA_H

#include <kdecore_export.h>
#include <klocale.h>
#include <kglobalsettings.h>

class KAboutData;
class KAboutLicense;

/**
 * This class is used to store information about a person or developer. It can store the person's
 * name, a task, an email address and a link to a home page. This class is intended for use in the
 * KAboutData class, but it can be used elsewhere as well. Normally you should at least define the
 * person's name. KAboutData methods KAboutData::authors() and KAboutData::credits() return lists
 * of KAboutPerson data objects which you can examine.
 *
 * Example usage within a main(), retrieving the list of people involved with a program and
 * re-using data from one of them:
 *
 * @code
 * KAboutData about("khello", "khello", ki18n("KHello"), "0.1",
 *                   ki18n("A KDE version of Hello, world!"),
 *                   KAboutData::License_LGPL,
 *                   ki18n("Copyright (C) 2003 Developer"));
 *
 * about.addAuthor(ki18n("Joe Developer"), ki18n("developer"), "joe@host.com", 0);
 * QList<KAboutPerson> people = about.authors();
 * about.addCredit(people[0].name(), people[0].task());
 * @endcode
 *
 * @note Instead of the more usual i18n calls, for translatable text the ki18n
 * calls are used to produce KLocalizedStrings, which can delay the translation
 * lookup. This is necessary because the translation catalogs are usually not
 * yet initialized at the point where KAboutData is constructed.
 */
class KDECORE_EXPORT KAboutPerson
{
    friend class KAboutData;
public:
    /**
     * Convenience constructor
     *
     * @param name The name of the person.
     * @param task The task of this person.
     * @param emailAddress The email address of the person.
     * @param webAddress Home page of the person.
     */
    explicit KAboutPerson(const KLocalizedString &name,
                          const KLocalizedString &task = KLocalizedString(),
                          const QByteArray &emailAddress = QByteArray(),
                          const QByteArray &webAddress = QByteArray());

    /**
     * Copy constructor.  Performs a deep copy.
     * @param other object to copy
     */
    KAboutPerson(const KAboutPerson &other);

    ~KAboutPerson();

    /**
     * Assignment operator. Performs a deep copy.
     * @param other object to copy
     */
    KAboutPerson& operator=(const KAboutPerson &other);

    /**
     * The person's name
     * @return the person's name (can be QString(), if it has been constructed with an empty name)
     */
    QString name() const;

    /**
     * The person's task
     * @return the person's task (can be QString(), if it has been constructed with an empty task)
     */
    QString task() const;

    /**
     * The person's email address
     * @return the person's email address (can be QString(), if it has been constructed with an
     *         empty email)
     */
    QString emailAddress() const;

    /**
     * The home page or a relevant link
     * @return the persons home page (can be QString(), if it has been constructed with an empty
     *         home page)
     */
    QString webAddress() const;

private:
    /**
     * @internal Used by KAboutData to construct translator data.
     */
    explicit KAboutPerson(const QString &name, const QString &email);

    class Private;
    Private *const d;
};

/**
 * This class is used to store information about a program. It can store such values as version
 * number, program name, home page, email address for bug reporting, multiple authors and
 * contributors (using KAboutPerson), license and copyright information.
 *
 * Currently, the values set here are shown by the "About" box (see KAboutDialog), and by the help
 * shown on command line (see KCmdLineArgs). They are also used for the icon and the name of the
 * program's windows.
 *
 * @note Instead of the more usual i18n calls, for translatable text the ki18n calls are used to
 * produce KLocalizedStrings, which can delay the translation lookup. This is necessary because the
 * translation catalogs are usually not yet initialized at the point where KAboutData is
 * constructed.
 *
 * @short Holds information needed by the "About" box and other classes.
 * @author Espen Sand (espen@kde.org), David Faure (faure@kde.org)
 */
class KDECORE_EXPORT KAboutData
{
public:
    /**
     * Describes the license of the software.
     */
    enum LicenseKey
    {
        License_Unknown = 0,
        License_GPL  = 1,
        License_GPL_V2 = 1,
        License_LGPL = 2,
        License_LGPL_V2 = 2,
        License_BSD  = 3,
        License_Artistic = 4,
        License_GPL_V3 = 5,
        License_LGPL_V3 = 6
    };

    /**
     * Format of the license name.
     */
    enum NameFormat
    {
        ShortName,
        FullName
    };

    /**
     * Constructor.
     *
     * @param appName The program name used internally. Example: "kedit"
     * @param catalogName The translation catalog name; if null or empty, the @p appName will be
     *        used. You may want the catalog name to differ from program name, for example, when
     *        you want to group translations of several smaller utilities under the same catalog.
     * @param programName A displayable program name string. This string should be marked for
     *        translation. Example: ki18n("KEdit")
     * @param version The program version string.
     * @param shortDescription A short description of what the program does. This string should be
     *        marked for translation. Example: ki18n("A simple text editor.")
     * @param licenseType The license identifier.
     * @param copyrightStatement A copyright statement, that can look like this:
     *        ki18n("Copyright (C) 1999-2000 Name"). The string specified here is taken verbatim,
     *        the author information from addAuthor is not used.
     */
    KAboutData(const QByteArray &appName,
               const QByteArray &catalogName,
               const KLocalizedString &programName,
               const QByteArray &version,
               const KLocalizedString &shortDescription = KLocalizedString(),
               enum LicenseKey licenseType = License_Unknown,
               const KLocalizedString &copyrightStatement = KLocalizedString());

    /**
     * Copy constructor. Performs a deep copy.
     * @param other object to copy
     */
     KAboutData(const KAboutData &other);

    /**
     * Assignment operator. Performs a deep copy.
     * @param other object to copy
     */
     KAboutData& operator=(const KAboutData &other);

     ~KAboutData();

    /**
     * Defines an author.
     *
     * You can call this function as many times as you need. Each entry is appended to a list. The
     * person in the first entry is assumed to be the leader of the project.
     *
     * @param name The developer's name. It should be marked for translation like this:
     *        ki18n("Developer Name")
     * @param task What the person is responsible for. This text can contain newlines. It should be
     *        marked for translation like this: ki18n("Task description..."). Can be left empty.
     * @param emailAddress An Email address where the person can be reached. Can be left empty.
     * @param webAddress The person's homepage or a relevant link. Start the address with
     *        "http://". "http://some.domain" is correct, "some.domain" is not. Can be left empty.
     */
    KAboutData& addAuthor(const KLocalizedString &name,
                          const KLocalizedString &task = KLocalizedString(),
                          const QByteArray &emailAddress = QByteArray(),
                          const QByteArray &webAddress = QByteArray());

    /**
     * Defines a person that deserves credit.
     *
     * You can call this function as many times as you need. Each entry is appended to a list.
     *
     * @param name The person's name. It should be marked for translation like this:
     *        ki18n("Contributor Name")
     * @param task What the person has done to deserve the honor. The text can contain newlines.
     *        It should be marked for translation like this: ki18n("Task description..."). Can be
     *        left empty.
     * @param emailAddress An email address when the person can be reached. Can be left empty.
     * @param webAddress The person's homepage or a relevant link. Start the address with
     *        "http://". "http://some.domain" is correct, "some.domain" is not. Can be left empty.
     */
    KAboutData& addCredit(const KLocalizedString &name,
                          const KLocalizedString &task = KLocalizedString(),
                          const QByteArray &emailAddress = QByteArray(),
                          const QByteArray &webAddress = QByteArray());

    /**
     * @brief Sets the name(s) of the translator(s) of the GUI.
     *
     * Since this depends on the language, just use a dummy text marked for translation. The
     * canonical use is:
     *
     * \code
     * setTranslator(ki18nc("NAME OF TRANSLATORS", "Your names"),
     *               ki18nc("EMAIL OF TRANSLATORS", "Your emails"));
     * \endcode
     *
     * The translator can then translate this dummy text with his name or with a list of names
     * separated with ",". If there is no translation or the application is used with the default
     * language, this function call is ignored.
     *
     * @param name the name(s) of the translator(s)
     * @param emailAddress the email address(es) of the translator(s)
     * @see KAboutTranslator
     */
    KAboutData& setTranslator(const KLocalizedString &name,
                              const KLocalizedString &emailAddress);

    /**
     * Defines the program name used internally.
     *
     * @param appName The application name. Example: "kate".
     */
    KAboutData& setAppName(const QByteArray &appName);

    /**
     * Defines the displayable program name string.
     *
     * @param programName The program name. This string should be marked for translation. Example:
     *        ki18n("Advanced Text Editor").
     */
    KAboutData &setProgramName(const KLocalizedString &programName);

    /**
     * Defines the program icon.
     *
     * Use this if you need to have an application icon
     * whose name is different than the application name.
     *
     * @param iconName name of the icon. Example: "accessories-text-editor"
     * @see programIconName()
     * @since 4.1
     */
    KAboutData& setProgramIconName(const QString &iconName);

    /**
     * Defines the program version string.
     *
     * @param version The program version.
     */
    KAboutData& setVersion(const QByteArray &version);

    /**
     * Defines a short description of what the program does.
     *
     * @param shortDescription The program description. This string should be marked for
     *        translation. Example: ki18n("An advanced text editor with syntax highlighting
     *        support.").
     */
    KAboutData& setShortDescription(const KLocalizedString &shortDescription);

    /**
     * Defines the translation catalog that the program uses.
     *
     * @param catalogName The translation catalog name.
     */
    KAboutData& setCatalogName(const QByteArray &catalogName);

    /**
     * Defines the license identifier.
     *
     * @param licenseKey The license identifier.
     * @see addLicense
     */
    KAboutData& setLicense(LicenseKey licenseKey);

    /**
     * Adds a license identifier.
     *
     * If there is only one unknown license set, e.g. by using the default parameter in the
     * constructor, that one is replaced.
     *
     * @param licenseKey The license identifier.
     * @since 4.1
     */
    KAboutData& addLicense(LicenseKey licenseKey);

    /**
     * Defines the copyright statement to show when displaying the license.
     *
     * @param copyrightStatement A copyright statement, that can look like this:
     *        ki18n("Copyright (C) 1999-2000 Name"). The string specified here is taken verbatim,
     *        the author information from addAuthor is not used.
     */
    KAboutData& setCopyrightStatement(const KLocalizedString &copyrightStatement);

    /**
     * Defines the program homepage.
     *
     * @param homepage The program homepage string. Start the address with "http://".
     *        "http://kate.kde.org" is correct but "kate.kde.org" is not. This defaults to the KDE
     *        homepage address.
     */
    KAboutData& setHomepage(const QByteArray &homepage);

    /**
     * Defines the address where bug reports should be sent.
     *
     * @param bugAddress The bug report email address string. This defaults to the KDE bug system
     *        address.
     */
    KAboutData &setBugAddress(const QByteArray &bugAddress);

    /**
     * Defines the Internet domain of the organization that wrote this application. The domain is
     * set to kde.org by default, or the domain of the homePageAddress constructor argument, if
     * set.
     *
     * Make sure to call setOrganizationDomain if your product is developed out of the kde.org
     * version-control system.
     *
     * Used by the automatic registration to D-Bus done by KApplication and KUniqueApplication.
     *
     * @param domain the domain name, for instance kde.org, koffice.org, kdevelop.org, etc.
     */
    KAboutData& setOrganizationDomain(const QByteArray &domain);

    /**
     * Returns the application's internal name.
     * @return the internal program name.
     */
    QString appName() const;

    /**
     * Returns the translated program name.
     * @return the program name (translated).
     */
    QString programName() const;

    /**
     * Returns the domain name of the organization that wrote this application.
     *
     * Used by the automatic registration to D-Bus done by KApplication and KUniqueApplication.
     */
    QString organizationDomain() const;

    /**
     * Returns the program's icon name.
     *
     * The default value is appName(). Use setProgramIconName() if you need to have an icon whose
     * name is different from the internal application name.
     *
     * @return the program's icon name.
     * @see setProgramIconName()
     * @since 4.1
     */
    QString programIconName() const;

    /**
     * Returns the program's version.
     * @return the version string.
     */
    QString version() const;

    /**
     * Returns a short, translated description.
     * @return the short description (translated). Can be QString() if not set.
     */
    QString shortDescription() const;

    /**
     * Returns the program's translation catalog name.
     * @return the catalog name.
     */
    QString catalogName() const;

    /**
     * Returns the application homepage.
     * @return the application homepage URL. Can be QString() if not set.
     */
    QString homepage() const;

    /**
     * Returns the email address for bugs.
     * @return the email address where to report bugs.
     */
    QString bugAddress() const;

    /**
     * Returns a list of authors.
     * @return author information (list of persons).
     */
    QList<KAboutPerson> authors() const;

    /**
     * Returns a list of persons who contributed.
     * @return credit information (list of persons).
     */
    QList<KAboutPerson> credits() const;

    /**
     * Returns a list of translators.
     * @return translators information (list of persons)
     */
    QList<KAboutPerson> translators() const;

    /**
     * Returns a message about the translation team.
     * @return a message about the translation team
     */
    static QString aboutTranslationTeam();

    /**
     * Returns the license. If the licenseType argument of the constructor has been used, any text
     * defined by setLicenseText is ignored, and the standard text for the chosen license will be
     * returned.
     *
     * @return The license text.
     * @deprecated There could be multiple licenses, use licenses() instead.
     */
    QString license() const;

    /**
     * Returns the license name.
     *
     * @return The license name as a string.
     * @deprecated There could be multiple licenses, use licenses() instead.
     */
    QString licenseName(NameFormat formatName) const;

    /**
     * Returns a list of licenses.
     *
     * @return licenses information (list of licenses)
     * @since 4.1
     */
    QList<KAboutLicense> licenses() const;

    /**
     * Returns the copyright statement.
     * @return the copyright statement. Can be QString() if not set.
     */
    QString copyrightStatement() const;

private:
    class Private;
    Private *const d;
};


/**
 * This class is used to store information about a license.
 *
 * The license can be one of the predefined or unknown. This class is used in the KAboutData class.
 * Explicitly creating a KAboutLicense object is not possible. If the license is wanted for a KDE
 * component having KAboutData object, use KAboutData::licenses() to get the licenses for that
 * component. If the license is for a non-code resource and given by a keyword (e.g. in .desktop
 * files), try using KAboutLicense::byKeyword().
 *
 * @note Instead of the more usual i18n calls, for translatable text the ki18n calls are used to
 * produce KLocalizedStrings, which can delay the translation lookup. This is necessary because the
 * translation catalogs are usually not yet initialized at the point where KAboutData is
 * constructed.
 */
class KDECORE_EXPORT KAboutLicense
{
    friend class KAboutData;
public:
    /**
     * Copy constructor.  Performs a deep copy.
     * @param other object to copy
     */
    KAboutLicense(const KAboutLicense &other);

    ~KAboutLicense();

    /**
     * Assignment operator.  Performs a deep copy.
     * @param other object to copy
     */
    KAboutLicense& operator=(const KAboutLicense &other);


    /**
     * Returns the full license text. If the licenseType argument of the constructor has been used
     * and the standard text for the chosen license will be returned.
     *
     * @return The license text.
     */
    QString text() const;

    /**
     * Returns the license name.
     *
     * @return The license name as a string.
     */
    QString name(KAboutData::NameFormat formatName) const;

    /**
     * Returns the license key.
     *
     * @return The license key as element of KAboutData::LicenseKey enum.
     * @since 4.1
     */
    KAboutData::LicenseKey key() const;

    /**
     * Fetch a known license by a keyword.
     *
     * Frequently the license data is provided by a terse keyword-like string, e.g. by a field in a
     * .desktop file. Using this method, an application can get hold of a proper KAboutLicense
     * object, providing that the license is one of the several known to KDE, and use it to present
     * more human-readable information to the user.
     *
     * Keywords are matched by stripping all whitespace and lowercasing. The known keywords
     * correspond to the KAboutData::LicenseKey enumeration, e.g. any of "LGPLV3", "LGPLv3",
     * "LGPL v3" would match License_LGPL_V3. If there is no match for the keyword, an invalid
     * license object is returned (KAboutData::License_Unknown).
     *
     * @param keyword The license keyword.
     * @return The license object.
     * @see KAboutData::LicenseKey
     * @since 4.1
     */
    static KAboutLicense byKeyword(const QString &keyword);

private:
    /**
     * @internal Used by KAboutData to construct a predefined license.
     */
    explicit KAboutLicense(enum KAboutData::LicenseKey licenseType, const KAboutData *aboutData);

    class Private;
    QSharedDataPointer<Private> d;
};

#endif // KABOUTDATA_H