/* util9p/static.h - Serve static files over 9P
 *
 * Copyright (C) 2024-2025  Luke T. Shumaker <lukeshu@lukeshu.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

#ifndef _UTIL9P_STATIC_H_
#define _UTIL9P_STATIC_H_

#include <lib9p/srv.h>

#define util9p_box(nam, obj)                                         \
	((struct lib9p_srv_file){                                    \
		.self = obj,                                         \
		.vtable = (void*)&_lo_##nam##_lib9p_srv_file_vtable, \
	})

#define UTIL9P_ATIME 1728337905
#define UTIL9P_MTIME 1728337904

/* Common *********************************************************************/

typedef struct {
	char                    *u_name;
	uint32_t                 u_num;
	char                    *g_name;
	uint32_t                 g_num;
	char                    *m_name;
	uint32_t                 m_num;

	uint64_t                 pathnum;
	char                    *name;
	lib9p_dm_t               perm;
	uint32_t                 atime, mtime;
} _util9p_static_common;

#define UTIL9P_STATIC_COMMON(PATH, STRNAME, MODE)                         \
	{                                                                 \
		.u_name = "root", .u_num = 0, /* owner user */            \
		.g_name = "root", .g_num = 0, /* owner group */           \
		.m_name = "root", .m_num = 0, /* last-modified-by user */ \
		                                                          \
		.pathnum = PATH,                                          \
		.name    = STRNAME,                                       \
		.perm    = MODE,                                          \
		.atime   = UTIL9P_ATIME,                                  \
		.mtime   = UTIL9P_MTIME,                                  \
	}

/* Dir ************************************************************************/

struct util9p_static_dir {
	_util9p_static_common;

	/* NULL-terminated */
	lo_interface lib9p_srv_file       members[];
};
LO_IMPLEMENTATION_H(lib9p_srv_file, struct util9p_static_dir, util9p_static_dir);
#define lo_box_util9p_static_dir_as_lib9p_srv_file(obj)  util9p_box(util9p_static_dir, obj)

#define UTIL9P_STATIC_DIR(PATH, STRNAME, ...)                                       \
	lo_box_util9p_static_dir_as_lib9p_srv_file(&((struct util9p_static_dir){    \
		._util9p_static_common = UTIL9P_STATIC_COMMON(PATH, STRNAME, 0555), \
		.members = { __VA_ARGS__ LO_NULL(lib9p_srv_file) },                 \
	}))

/* File ***********************************************************************/

struct util9p_static_file {
	_util9p_static_common;

	char                    *data_start; /* must not be NULL */
	char                    *data_end;   /* may be NULL, in which case data_size is used */
	size_t                   data_size;  /* only used if .data_end==NULL */
};
LO_IMPLEMENTATION_H(lib9p_srv_file, struct util9p_static_file, util9p_static_file);
#define lo_box_util9p_static_file_as_lib9p_srv_file(obj) util9p_box(util9p_static_file, obj)

#define UTIL9P_STATIC_FILE(PATH, STRNAME, ...)                                      \
	lo_box_util9p_static_file_as_lib9p_srv_file(&((struct util9p_static_file){  \
		._util9p_static_common = UTIL9P_STATIC_COMMON(PATH, STRNAME, 0444), \
		__VA_ARGS__                                                         \
	}))

#endif /* _UTIL9P_STATIC_H_ */