//
// aegis - project change supervisor
// Copyright (C) 2001-2008, 2011, 2012, 2014 Peter Miller
// Copyright (C) 2008 Walter Franzini
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or (at
// your option) any later version.
//
// This program 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, see <http://www.gnu.org/licenses/>.
//

#include <common/ac/assert.h>

#include <libaegis/change/branch.h>
#include <libaegis/project.h>


time_t
change_history_delta_to_timestamp(project *pp, long delta_number)
{
        cstate_ty       *cstate_data;
        cstate_branch_history_list_ty *hl;
        size_t          j;
        change::pointer cp;

        cp = pp->change_get();
        cstate_data = cp->cstate_get();
        if (!cstate_data->branch)
                return (time_t)-1;
        if (delta_number == 0)
        {
                //
                // special case, meaning
                // "when the branch was created"
                //
                if (cstate_data->history && cstate_data->history->length)
                        return cstate_data->history->list[0]->when;
                return (time_t)-1;
        }
        hl = cstate_data->branch->history;
        if (!hl)
                return (time_t)-1;
        for (j = 0; j < hl->length; ++j)
        {
                cstate_branch_history_ty *bh;
                change::pointer cp2;
                time_t          result;

                bh = hl->list[j];
                assert(bh);
                if (!bh)
                        continue;
                if (bh->delta_number != delta_number)
                        continue;

                if (bh->when != TIME_NOT_SET)
                    return bh->when;

                cp2 = change::create(pp, bh->change_number);
                cp2->bind_existing();
                result = cp2->completion_timestamp();
                return result;
        }
        return (time_t)-1;
}


// vim: set ts=8 sw=4 et :