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wmud/wmud/db.c

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/* wMUD - Yet another MUD codebase by W00d5t0ck
* Copyright (C) 2012 - Gergely POLONKAI
*
* db.c: database handling routines
*
* 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 2 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 <glib.h>
#include <libgda/libgda.h>
#include <sql-parser/gda-sql-parser.h>
#include "world.h"
#include "main.h"
#include "db.h"
#include "players.h"
#include "configuration.h"
#include "menu.h"
#include "wmudplayer.h"
/**
* SECTION:db
* @short_description: Database handling
* @title: Database handling routines
*
* This module handles all the database requests. It currently uses an SQLite3
* backend, but due to its nature, it could be easily rewritten to use a
* different (e.g MySQL or PostgreSQL) database.
*/
static GdaConnection *dbh = NULL;
static GdaSqlParser *parser = NULL;
GQuark
wmud_db_error_quark()
{
return g_quark_from_static_string("wmud-db-error");
}
/**
* wmud_db_init:
* @err: a GError to put error messages in it
*
* Initializes the wMUD database system. Checks and opens database files.
*/
gboolean
wmud_db_init(GError **err)
{
GError *local_err = NULL;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Initializing database");
gda_init();
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Database DSN is \"%s\"",
active_config->database_dsn);
dbh = gda_connection_open_from_string(NULL,
active_config->database_dsn,
NULL,
GDA_CONNECTION_OPTIONS_THREAD_SAFE,
&local_err);
if (dbh == NULL) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_CANTOPEN,
"Can not open databsae (%s): %s",
active_config->database_dsn,
local_err->message);
return FALSE;
}
parser = gda_sql_parser_new();
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Database initialization finished.");
return TRUE;
}
/**
* wmud_db_load_players:
* @err: a GError to put error messages in it
*
* Loads all player records from the database
*/
gboolean
wmud_db_load_players(GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res;
GdaDataModelIter *iter;
GError *local_err = NULL;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading players");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT id, login, password, email FROM players",
NULL,
NULL);
/* TODO: error checking! */
if ((res = gda_connection_statement_execute_select(
dbh,
sth,
NULL,
&local_err)) == NULL) {
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,
"Unable to load players: %s",
local_err->message);
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_SELECT_ERROR,
"SELECT error: %s",
local_err->message);
return FALSE;
}
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
WmudPlayer *player;
player = wmud_player_new();
val = gda_data_model_iter_get_value_at(iter, 0);
wmud_player_set_id(player, g_value_get_int(val));
val = gda_data_model_iter_get_value_at(iter, 1);
wmud_player_set_player_name(player, g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 2);
wmud_player_set_cpassword(player, g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 3);
wmud_player_set_email(player, g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded player _%s_",
wmud_player_get_player_name(player));
players = g_slist_prepend(players, player);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Finished loading players");
return TRUE;
}
/**
* wmud_db_save_player:
* @player: the player record to save
* @err: a GError to put error messages in it
*
* Saves a player record to the database backend.
*
* Return value: %TRUE on success. Upon failure, %FALSE is returned, and err is
* set accordingly.
*/
gboolean
wmud_db_save_player(WmudPlayer *player, GError **err)
{
GError *local_err = NULL;
GValue *login_value,
*email_value;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Saving player");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
login_value = gda_value_new_from_string(
wmud_player_get_player_name(player),
G_TYPE_STRING);
email_value = gda_value_new_from_string(
wmud_player_get_email(player),
G_TYPE_STRING);
if (!gda_connection_insert_row_into_table(dbh,
"players",
&local_err,
"id", NULL,
"login", login_value,
"password", NULL,
"email", email_value,
NULL)) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_BADQUERY,
"Error saving player: %s",
local_err->message);
return FALSE;
}
return TRUE;
}
gboolean
wmud_db_update_player_password(WmudPlayer *player,
gchar *crypted_password,
GError **err)
{
GValue *cpw,
*player_id;
GError *local_err = NULL;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Saving player password for %s",
wmud_player_get_player_name(player));
if (dbh == NULL) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
return FALSE;
}
player_id = gda_value_new(G_TYPE_UINT);
g_value_set_uint(player_id, wmud_player_get_id(player));
cpw = gda_value_new_from_string(crypted_password, G_TYPE_STRING);
if (!gda_connection_update_row_in_table(dbh,
"players",
"id", player_id,
&local_err,
"password", cpw,
NULL)) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_BADQUERY,
"Error saving player password: %s",
local_err->message);
return FALSE;
}
return TRUE;
}
gboolean
wmud_db_load_planes(GSList **planes, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading planes");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(parser,
"SELECT id, name FROM planes",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudPlane *plane;
plane = g_new0(wmudPlane, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
plane->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
plane->name = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded plane _%s_",
plane->name);
*planes = g_slist_prepend(*planes, plane);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_planets(GSList **planets, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading planets");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(parser,
"SELECT id, name FROM planets",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudPlanet *planet;
planet = g_new0(wmudPlanet, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
planet->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
planet->name = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded planet _%s_",
planet->name);
*planets = g_slist_prepend(*planets, planet);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_directions(GSList **directions, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
GError *local_err = NULL;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading directions");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT id, short_name, name FROM directions",
NULL,
NULL);
if ((res = gda_connection_statement_execute_select(
dbh, sth,
NULL, &local_err)) == NULL) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_SELECT_ERROR,
"Unable to load directions: %s",
local_err->message);
return FALSE;
}
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudDirection *dir;
dir = g_new0(wmudDirection, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
dir->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
dir->short_name = g_strdup(g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 2);
dir->name = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded direction _%s_",
dir->name);
*directions = g_slist_prepend(*directions, dir);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_areas(GSList **areas, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading areas");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT id, name FROM areas",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudArea *area;
area = g_new0(wmudArea, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
area->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
area->name = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loaded area _%s_", area->name);
*areas = g_slist_prepend(*areas, area);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_rooms(GSList **rooms, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading rooms");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT id, area, name, distant_description, close_description FROM rooms",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudRoom *room;
room = g_new0(wmudRoom, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
room->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
room->area_id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 2);
room->name = g_strdup(g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 3);
room->distant_description = g_strdup(g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 4);
room->close_description = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded room %d/_%s_",
room->area_id,
room->name);
*rooms = g_slist_prepend(*rooms, room);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_exits(GSList **exits, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading exits");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT room_id, direction, other_side FROM room_exits",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudExit *room_exit;
room_exit = g_new0(wmudExit, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
room_exit->source_room_id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
room_exit->direction_id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 2);
room_exit->destination_room_id = g_value_get_int(val);
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded exit %d =%d=> %d",
room_exit->source_room_id,
room_exit->direction_id,
room_exit->destination_room_id);
*exits = g_slist_prepend(*exits, room_exit);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_planet_planes(GSList **planet_planes, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loading planet<->plane associations");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT planet_id, plane_id FROM planet_planes",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudPlanetPlaneAssoc *planet_plane;
planet_plane = g_new0(wmudPlanetPlaneAssoc, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
planet_plane->planet_id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
planet_plane->plane_id = g_value_get_int(val);
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded planet-plane association %d <> %d",
planet_plane->planet_id,
planet_plane->plane_id);
*planet_planes = g_slist_prepend(*planet_planes, planet_plane);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
gboolean
wmud_db_load_menu(GSList **menu_items, GError **err)
{
GdaStatement *sth = NULL;
GdaDataModel *res = NULL;
GdaDataModelIter *iter;
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Loading menu items");
if (dbh == NULL) {
if (err) {
g_set_error(err,
WMUD_DB_ERROR, WMUD_DB_ERROR_NOINIT,
"Database backend not initialized");
}
return FALSE;
}
sth = gda_sql_parser_parse_string(
parser,
"SELECT id, menuchar, need_active_char, placement, display_text, fnctn FROM menu ORDER BY placement",
NULL,
NULL);
res = gda_connection_statement_execute_select(dbh, sth, NULL, NULL);
iter = gda_data_model_create_iter(res);
gda_data_model_iter_move_next(iter);
while (gda_data_model_iter_is_valid(iter)) {
const GValue *val;
wmudMenu *menu_item;
menu_item = g_new0(wmudMenu, 1);
val = gda_data_model_iter_get_value_at(iter, 0);
menu_item->id = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 1);
menu_item->menuchar = *(g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 2);
menu_item->need_active_char = g_value_get_boolean(val);
val = gda_data_model_iter_get_value_at(iter, 3);
menu_item->placement = g_value_get_int(val);
val = gda_data_model_iter_get_value_at(iter, 4);
menu_item->text = g_strdup(g_value_get_string(val));
val = gda_data_model_iter_get_value_at(iter, 5);
menu_item->func = g_strdup(g_value_get_string(val));
g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loaded menu item %d: %s(%c)",
menu_item->id, menu_item->text,
menu_item->menuchar);
*menu_items = g_slist_prepend(*menu_items, menu_item);
gda_data_model_iter_move_next(iter);
}
g_object_unref(iter);
g_object_unref(sth);
return TRUE;
}
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