/** @file nav.c
 * @brief Navigation
 *
 * Example:
 * <ACTION sym="nav">
 *     pop
 *     push /view_name
 * </ACTION>
 *
 * Possible navigation commands:
 * * push <view_name> - Push "view_name" view to new level of path and change
 *     current path to it.
 * * pop [num] - Pop up path levels. Optional "num" argument specifies number
 *     of levels to pop. Default is 1.
 * * top - Pop up to first path level.
 * * exit - Exit klish.
 */

#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>

#include <faux/str.h>
#include <faux/list.h>
#include <klish/kcontext.h>
#include <klish/kentry.h>


int klish_nav(kcontext_t *context)
{
	kparg_t *parg = NULL;
	const kentry_t *entry = NULL;
	const char *value = NULL;
	const char *command_name = NULL;

	// Navigation is suitable only for command actions but not for
	// PTYPEs, CONDitions i.e. SERVICE_ACTIONS.
	assert(kcontext_type(context) == KCONTEXT_ACTION);

	parg = kcontext_candidate_parg(context);
	entry = kparg_entry(parg);
	value = kparg_value(parg);

	command_name = kentry_value(entry);
	if (!command_name)
		command_name = kentry_name(entry);
	if (!command_name)
		return -1;

	return faux_str_casecmp(value, command_name);
}