//
//	aegis - project change supervisor
//	Copyright (C) 1999, 2000, 2002-2008 Peter Miller
//
//	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 <libaegis/change/file.h>
#include <common/error.h> // for assert
#include <libaegis/os.h>
#include <libaegis/project.h>
#include <libaegis/project/file.h>
#include <common/trace.h>


string_ty *
change_file_source(change::pointer cp, string_ty *file_name)
{
    string_ty       *result;
    cstate_ty       *cstate_data;
    fstate_src_ty   *src;

    //
    // For changes which are not somewhere between `being developed'
    // and `being integrated' look in the project only.
    //
    trace(("change_file_source(cp = %08lX, file_name = \"%s\")\n{\n",
	(long)cp, file_name->str_text));
    cstate_data = cp->cstate_get();
    if
    (
	cstate_data->state == cstate_state_awaiting_development
    ||
	cstate_data->state == cstate_state_completed
    )
	goto projfile;

    //
    // see if the file is in the change
    //
    src = change_file_find(cp, file_name, view_path_first);
    if (src && !src->about_to_be_copied_by)
    {
	result = change_file_path(cp, file_name);
	assert(result);
	trace(("return \"%s\";\n", result->str_text));
	trace(("}\n"));
	return result;
    }

    //
    // If the change is being integrated, and the file would be in
    // the branch's baseline, then the path to it is in the
    // integration directory.
    //
    if (cstate_data->state == cstate_state_being_integrated)
    {
	change::pointer pcp = cp->pp->change_get();
	src = change_file_find(pcp, file_name, view_path_first);
	if (src && !src->about_to_be_copied_by)
	{
	    string_ty       *id;

	    id = change_integration_directory_get(cp, 0);
	    result = os_path_cat(id, file_name);
	    assert(result);
	    trace(("return \"%s\";\n", result->str_text));
	    trace(("}\n"));
	    return result;
	}
    }

    //
    // see if the file is in the project
    //
    projfile:
    if (project_file_find(cp->pp, file_name, view_path_simple))
    {
	result = project_file_path(cp->pp, file_name);
	assert(result);
	trace(("return \"%s\";\n", result->str_text));
	trace(("}\n"));
	return result;
    }

    //
    // no such file
    //
    trace(("return NULL;\n"));
    trace(("}\n"));
    return 0;
}