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/* vim: set sw=4 sts=4 et foldmethod=syntax : */

/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011 Ciaran McCreesh
 *
 * This file is part of the Paludis package manager. Paludis is free software;
 * you can redistribute it and/or modify it under the terms of the GNU General
 * Public License version 2, as published by the Free Software Foundation.
 *
 * Paludis 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef PALUDIS_GUARD_PALUDIS_HANDLED_INFORMATION_HH
#define PALUDIS_GUARD_PALUDIS_HANDLED_INFORMATION_HH 1

#include <paludis/legacy/handled_information-fwd.hh>
#include <paludis/util/simple_visitor.hh>
#include <paludis/util/attributes.hh>
#include <paludis/util/pimp.hh>
#include <paludis/util/type_list.hh>
#include <paludis/dep_spec-fwd.hh>
#include <paludis/package_id-fwd.hh>

/** \file
 * Declarations for DepListEntryHandled classes, which are used by DepList and
 * InstallTask to keep track of whether a DepListEntry has been handled yet.
 *
 * \ingroup g_dep_list
 *
 * \section Examples
 *
 * - None at this time.
 */

namespace paludis
{
    /**
     * Represents a DepListEntry that has been handled.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandled :
        public virtual DeclareAbstractAcceptMethods<DepListEntryHandled, MakeTypeList<
                DepListEntryHandledSuccess,
                DepListEntryHandledFetchSuccess,
                DepListEntryHandledFetchFailed,
                DepListEntryHandledSkippedUnsatisfied,
                DepListEntryHandledSkippedDependent,
                DepListEntryHandledFailed,
                DepListEntryUnhandled,
                DepListEntryNoHandlingRequired>::Type>
    {
        public:
            virtual ~DepListEntryHandled() = 0;
    };

    /**
     * Represents a DepListEntry that has not been handled.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryUnhandled :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryUnhandled>
    {
    };

    /**
     * Represents a DepListEntry that requires no handling.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryNoHandlingRequired :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryNoHandlingRequired>
    {
    };

    /**
     * Represents a DepListEntry that has been handled successfully.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledSuccess :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledSuccess>
    {
    };

    /**
     * Represents a DepListEntry that has been fetched successfully, but has
     * not yet started its install.
     *
     * \ingroup g_dep_list
     * \since 0.38
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledFetchSuccess :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledFetchSuccess>
    {
    };

    /**
     * Represents a DepListEntry that was skipped because of unsatisfied
     * dependencies.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledSkippedUnsatisfied :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledSkippedUnsatisfied>
    {
        private:
            Pimp<DepListEntryHandledSkippedUnsatisfied> _imp;

        public:
            ///\name Basic operations
            ///\{

            DepListEntryHandledSkippedUnsatisfied(const PackageDepSpec &);
            ~DepListEntryHandledSkippedUnsatisfied();

            ///\}

            /**
             * What PackageDepSpec was unsatisfied? If multiple specs were
             * unsatisfied, returns one of them.
             */
            const PackageDepSpec spec() const PALUDIS_ATTRIBUTE((warn_unused_result));
    };

    /**
     * Represents a DepListEntry that was skipped because of a dependency upon a
     * failed package.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledSkippedDependent :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledSkippedDependent>
    {
        private:
            Pimp<DepListEntryHandledSkippedDependent> _imp;

        public:
            ///\name Basic operations
            ///\{

            DepListEntryHandledSkippedDependent(const std::shared_ptr<const PackageID> &);
            ~DepListEntryHandledSkippedDependent();

            ///\}

            /**
             * Upon which PackageID are we dependent? If multiple dependent IDs are
             * unsatisfied, returns one of them.
             */
            const std::shared_ptr<const PackageID> id() const PALUDIS_ATTRIBUTE((warn_unused_result));
    };

    /**
     * Represents a DepListEntry that failed.
     *
     * \ingroup g_dep_list
     * \since 0.26
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledFailed :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledFailed>
    {
    };

    /**
     * Represents a DepListEntry that failed its fetch.
     *
     * \ingroup g_dep_list
     * \since 0.38
     * \nosubgrouping
     */
    class PALUDIS_VISIBLE DepListEntryHandledFetchFailed :
        public DepListEntryHandled,
        public ImplementAcceptMethods<DepListEntryHandled, DepListEntryHandledFetchFailed>
    {
    };
}

#endif