/* apk_database.h - Alpine Package Keeper (APK)
 *
 * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
 * Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation. See http://www.gnu.org/ for details.
 */

#ifndef APK_PKGDB_H
#define APK_PKGDB_H

#include "apk_version.h"
#include "apk_hash.h"
#include "apk_archive.h"
#include "apk_package.h"
#include "apk_io.h"

extern const char * const apk_index_gz;
extern const char * const apkindex_tar_gz;

struct apk_name;
APK_ARRAY(apk_name_array, struct apk_name *);

struct apk_db_file {
	struct hlist_node hash_node;
	struct hlist_node diri_files_list;

	struct apk_db_dir_instance *diri;
	mode_t mode;
	uid_t uid;
	gid_t gid;

	unsigned short namelen;
	struct apk_checksum csum;
	char name[];
};

struct apk_protected_path {
	char *relative_pattern;
	unsigned protected : 1;
	unsigned symlinks_only : 1;
};
APK_ARRAY(apk_protected_path_array, struct apk_protected_path);

struct apk_db_dir {
	apk_hash_node hash_node;
	unsigned long hash;

	struct apk_db_dir *parent;
	struct apk_protected_path_array *protected_paths;
	mode_t mode;
	uid_t uid;
	gid_t gid;

	unsigned short refs;
	unsigned short namelen;

	unsigned protected : 1;
	unsigned symlinks_only : 1;
	unsigned has_protected_children : 1;
	unsigned modified : 1;
	unsigned recalc_mode : 1;

	char rooted_name[1];
	char name[];
};

struct apk_db_dir_instance {
	struct hlist_node pkg_dirs_list;
	struct hlist_head owned_files;
	struct apk_package *pkg;
	struct apk_db_dir *dir;
	mode_t mode;
	uid_t uid;
	gid_t gid;
};

struct apk_name {
	apk_hash_node hash_node;
	union {
		int state_int;
		void *state_ptr;
	};
	char *name;
	struct apk_package_array *pkgs;
	struct apk_name_array *rdepends;
	struct apk_name_array *rinstall_if;
};

struct apk_repository {
	char *url;
	struct apk_checksum csum;

	apk_blob_t description;
};

struct apk_repository_list {
	struct list_head list;
	const char *url;
};

struct apk_db_options {
	int lock_wait;
	unsigned long open_flags;
	char *root;
	char *arch;
	char *keys_dir;
	char *repositories_file;
	struct list_head repository_list;
};

#define APK_DEFAULT_REPOSITORY_TAG	0
#define APK_DEFAULT_PINNING_MASK	BIT(APK_DEFAULT_REPOSITORY_TAG)

struct apk_repository_tag {
	unsigned int allowed_repos;
	apk_blob_t *name;
};

struct apk_database {
	char *root;
	int root_fd, lock_fd, cache_fd, cachetmp_fd, keys_fd;
	unsigned num_repos, num_repo_tags;
	const char *cache_dir;
	char *cache_remount_dir;
	apk_blob_t *arch;
	unsigned int local_repos, bad_repos;
	int performing_self_update : 1;
	int permanent : 1;
	int compat_newfeatures : 1;
	int compat_notinstallable : 1;
	int compat_old_world : 1;

	struct apk_dependency_array *world;
	struct apk_protected_path_array *protected_paths;
	struct apk_repository repos[APK_MAX_REPOS];
	struct apk_repository_tag repo_tags[APK_MAX_TAGS];
	struct apk_id_cache id_cache;

	struct {
		struct apk_hash names;
		struct apk_hash packages;
	} available;

	struct {
		struct list_head packages;
		struct list_head triggers;
		struct apk_hash dirs;
		struct apk_hash files;
		struct {
			unsigned files;
			unsigned dirs;
			unsigned packages;
			size_t bytes;
		} stats;
	} installed;
};

typedef union apk_database_or_void {
	struct apk_database *db;
	void *ptr;
} apk_database_t __attribute__ ((__transparent_union__));

struct apk_name *apk_db_get_name(struct apk_database *db, apk_blob_t name);
struct apk_name *apk_db_query_name(struct apk_database *db, apk_blob_t name);
int apk_db_get_tag_id(struct apk_database *db, apk_blob_t tag);

struct apk_db_dir *apk_db_dir_get(struct apk_database *db, apk_blob_t name);
struct apk_db_dir *apk_db_dir_query(struct apk_database *db, apk_blob_t name);
struct apk_db_file *apk_db_file_query(struct apk_database *db,
				      apk_blob_t dir, apk_blob_t name);

#define APK_OPENF_READ			0x0001
#define APK_OPENF_WRITE			0x0002
#define APK_OPENF_CREATE		0x0004
#define APK_OPENF_NO_INSTALLED		0x0010
#define APK_OPENF_NO_SCRIPTS		0x0020
#define APK_OPENF_NO_WORLD		0x0040
#define APK_OPENF_NO_SYS_REPOS		0x0100
#define APK_OPENF_NO_INSTALLED_REPO	0x0200
#define APK_OPENF_CACHE_WRITE		0x0400

#define APK_OPENF_NO_REPOS	(APK_OPENF_NO_SYS_REPOS |	\
				 APK_OPENF_NO_INSTALLED_REPO)
#define APK_OPENF_NO_STATE	(APK_OPENF_NO_INSTALLED |	\
				 APK_OPENF_NO_SCRIPTS |		\
				 APK_OPENF_NO_WORLD)

int apk_db_open(struct apk_database *db, struct apk_db_options *dbopts);
void apk_db_close(struct apk_database *db);
int apk_db_write_config(struct apk_database *db);
int apk_db_permanent(struct apk_database *db);
int apk_db_check_world(struct apk_database *db, struct apk_dependency_array *world);
struct apk_package_array *apk_db_get_pending_triggers(struct apk_database *db);

struct apk_package *apk_db_pkg_add(struct apk_database *db, struct apk_package *pkg);
struct apk_package *apk_db_get_pkg(struct apk_database *db, struct apk_checksum *csum);
struct apk_package *apk_db_get_file_owner(struct apk_database *db, apk_blob_t filename);

int apk_db_index_read(struct apk_database *db, struct apk_bstream *bs, int repo);
int apk_db_index_read_file(struct apk_database *db, const char *file, int repo);
int apk_db_index_write(struct apk_database *db, struct apk_ostream *os);

int apk_db_add_repository(apk_database_t db, apk_blob_t repository);
struct apk_repository *apk_db_select_repo(struct apk_database *db,
					  struct apk_package *pkg);
int apk_repository_update(struct apk_database *db, struct apk_repository *repo);
int apk_repo_is_remote(struct apk_repository *repo);
int apk_repo_format_filename(char *buf, size_t len,
			     const char *repourl, apk_blob_t *arch,
			     const char *pkgfile);

int apk_db_cache_active(struct apk_database *db);
void apk_cache_format_index(apk_blob_t to, struct apk_repository *repo);
int apk_cache_download(struct apk_database *db, const char *url, apk_blob_t *arch,
		       const char *item, const char *cache_item, int verify);

typedef void (*apk_cache_item_cb)(struct apk_database *db,
				  int dirfd, const char *name,
				  struct apk_package *pkg);
int apk_db_cache_foreach_item(struct apk_database *db, apk_cache_item_cb cb);

int apk_db_install_pkg(struct apk_database *db,
		       struct apk_package *oldpkg,
		       struct apk_package *newpkg,
		       apk_progress_cb cb, void *cb_ctx);

#endif