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/*
* Copyright (C) 2021 Soleta Networks <info@soleta.eu>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License as published by the
* Free Software Foundation, version 3.
*/
#include <syslog.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "dbi.h"
#include "cfg.h"
#include <syslog.h>
#include <string.h>
#include <stdio.h>
struct og_server_cfg ogconfig;
static int og_dbi_create_version(struct og_dbi *dbi)
{
const char *msglog;
dbi_result result;
result = dbi_conn_queryf(dbi->conn, "CREATE TABLE `version` "
"(`version` smallint unsigned NOT NULL) "
"ENGINE='MyISAM' COLLATE 'utf8_general_ci'");
if (!result) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_INFO, "Could not create schema version table (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
dbi_result_free(result);
result = dbi_conn_queryf(dbi->conn, "INSERT INTO `version` (`version`) VALUES ('0')");
if (!result) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_INFO, "Could not insert into schema version table (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
dbi_result_free(result);
return 0;
}
static int og_dbi_schema_version(struct og_dbi *dbi)
{
const char *msglog;
dbi_result result;
uint32_t version;
result = dbi_conn_queryf(dbi->conn, "SELECT * from version");
if (!result) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_INFO, "no version table found (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
if (!dbi_result_last_row(result)) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_ERR, "cannot get last row from version table (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
version = dbi_result_get_uint(result, "version");
dbi_result_free(result);
return version;
}
static int og_dbi_schema_v1(struct og_dbi *dbi)
{
const char *msglog, *command;
dbi_result result, result_alter;
result = dbi_conn_queryf(dbi->conn, "SELECT concat('alter table `',TABLE_SCHEMA,'`.`',TABLE_NAME,'` engine=innodb;')"
"AS cmd FROM information_schema.TABLES WHERE TABLE_SCHEMA='%s'",
ogconfig.db.name);
while (dbi_result_next_row(result)) {
command = dbi_result_get_string(result, "cmd");
syslog(LOG_DEBUG, "Upgrading to innoDB: %s\n", command);
result_alter = dbi_conn_query(dbi->conn, command);
if (!result_alter) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_INFO, "Error when upgrading engine to innoDB (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
dbi_result_free(result_alter);
}
dbi_result_free(result);
result = dbi_conn_query(dbi->conn, "UPDATE version SET version = 1");
if (!result) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_INFO, "Could not update version row (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
dbi_result_free(result);
return 0;
}
static struct og_schema_version {
int version;
int (*update)(struct og_dbi *dbi);
} schema_version[] = {
{ .version = 1, .update = og_dbi_schema_v1 },
{ 0, NULL },
};
int og_dbi_schema_update(void)
{
int version, i, err;
struct og_dbi *dbi;
const char *msglog;
dbi = og_dbi_open(&ogconfig.db);
if (!dbi) {
dbi_conn_error(dbi->conn, &msglog);
syslog(LOG_ERR, "failed to query database (%s:%d) %s\n",
__func__, __LINE__, msglog);
return -1;
}
version = og_dbi_schema_version(dbi);
if (version < 0) {
syslog(LOG_INFO, "creating table version in schema\n");
og_dbi_create_version(dbi);
} else {
syslog(LOG_INFO, "database schema version %d\n", version);
}
for (i = 0; schema_version[i].version; i++) {
if (version >= schema_version[i].version)
continue;
syslog(LOG_INFO, "upgrading to schema version %d\n", schema_version[i].version);
err = schema_version[i].update(dbi);
if (err < 0) {
syslog(LOG_ERR, "failed to update schema!\n");
og_dbi_close(dbi);
return -1;
}
}
og_dbi_close(dbi);
return 0;
}
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