/* Copyright (C) 2009 Luke Shumaker
   
   This file is part of rvs.
   
   rvs 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 2, or (at your
   option) any later version.
   
   rvs 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 rvs; see the file COPYING.
   If not, write to the Free Software Foundation,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef FILE_plugin_depend_c_SEEN
#define FILE_plugin_depend_c_SEEN

/* translates a string in format `plugin/command' into a pointer to the command
   DON'T plan on using the string again, it will be mutilated!
    (so we go ahead and free() it and set the pointer to NULL)                */
struct plugin_command *
_plugin_depend_parse (char **string, struct plugin_command *root)
{
	struct plugin_command *command=NULL;
	
	if (*string==NULL)
		*string=root;
	else {
		/* *string is in the format `plugin/command' */
		/* char *del=delimeter */
		char *del=strchr(*string,'/');
		del[0]='\0';
		///  *string =  PLUGIN_NAME
		///  &del[1] = COMMAND_NAME
		struct plugin *plugin;
		plugin =_plugin_find_plugin(root,                  *string );
		if (plugin==NULL)
			error(EXIT_FAILURE,0,"cannot find plugin `%s'",*string);
		command=_plugin_find_plugin_command(plugin->child, &del[1] );
		if (command==NULL)
			error(EXIT_FAILURE,0,
				"plugin `%s' does not contain command `%s'",
				*string,&del[1]);
		xfree(*string);
		*string=NULL;
	}
	return command;
}

/* used by _plugin_depend_add */
void
_plugin_depend_add2 (struct plugin_command *prev,
                     struct plugin_command *next)
{
	if (prev->d_next==NULL) {
		prev->d_next=next;
	} else {
		_plugin_depend_add2(prev->d_next,next);
	}
}

/* _plugin_depend_add(depend,depender) */
void
_plugin_depend_add (struct plugin_command *depend,
                    struct plugin_command *depender)
{
	if (depend->child==NULL) {
		depend->child=depender;
	} else {
		_plugin_depend_add2(depend->child,depender);
	}
}

/* take care of depends for `command', and those after it (linked list) */
void
_plugin_depend_command (struct plugin_command *command,
                        struct plugin_command *root)
{
	if (command->depends == NULL) {
		command->depend=root;
	} else {
		command->depend=_plugin_depend_parse(root,command->depends);
		command->depends=NULL;
	}
	_plugin_depend_add(command->depend,command);
	if (command->p_next != NULL)
		_plugin_depend_command(command->p_next,root);
}

/* take care of commands for a `plugin', and those after it (linked list) */
void
_plugin_depend_plugin_all (struct plugin *plugin, struct plugin_command *root)
{
	_plugin_depend_command(plugin->child,root);
	if (plugin->next != NULL) {
		_plugin_depend_plugin_all(plugin->next,root);
	}
}

/* take care of all depends */
struct plugin_command *
_plugin_depend_all (struct plugin_command *plugins)
{
	struct plugin_command *root=mkcommand();
	
	_plugin_depend_plugin_all(*plugins,root);
	return root;
}

/* take care of all depends for a particular command */
struct plugin_command *
_plugin_depend_name (char *name, struct plugin_command *plugins)
{
	struct plugin_command *root=mkcommand();
	
	/* code goes here */
	return root;
}

#endif