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/*
* Created by yuuta on 11/28/21.
*/
#include "db.h"
#include "log.h"
#include "botd.h"
#include <stdio.h>
#include <sqlite3.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#ifndef SQL_PATH
#define SQL_PATH "../sql/"
#endif
sqlite3 *db = NULL;
void db_init(void) {
int r;
r = sqlite3_open(cmd.db_path, &db);
if (r) {
LOGFEV("Cannot open SQLite3 database: %s", r, sqlite3_errstr(r));
}
char *errmsg = NULL;
/* Enable foreign key support */
r = sqlite3_exec(db, "PRAGMA foreign_keys = ON;", NULL, NULL, &errmsg);
if (r) {
goto sql_err;
sql_err:
db_close();
LOGFEV("%s", r, errmsg);
}
/* Get user_version */
sqlite3_stmt *stmt;
r = sqlite3_prepare_v2(db, "PRAGMA user_version", -1, &stmt, 0);
if (r) {
goto sql_err;
}
r = sqlite3_step(stmt);
if (r != SQLITE_ROW) {
sqlite3_finalize(stmt);
goto sql_err;
}
const int current_var = sqlite3_column_int(stmt, 0);
r = sqlite3_finalize(stmt);
/* Upgrade one by one */
FILE *fd_sql = NULL;
char *path_sql = NULL;
const unsigned int path_len = strlen(SQL_PATH) + 20;
path_sql = calloc(path_len, sizeof(char));
if (path_sql == NULL) {
r = errno;
db_close();
LOGFEV("Cannot allocate memory: %s", r, strerror(r));
}
for (int i = current_var; true; i++) {
snprintf(path_sql, path_len - 1, "%s/%d_%d.sql", SQL_PATH, i, i + 1);
fd_sql = fopen(path_sql, "r");
if (fd_sql == NULL) {
if (errno != ENOENT) {
r = errno;
free(path_sql);
db_close();
LOGFEV("Cannot upgrade database to %d: %s", r, i + 1, strerror(r));
}
break;
}
char *sql_str = NULL;
char *line = NULL;
size_t len = 0;
ssize_t tread = 0;
ssize_t nread;
while ((nread = getline(&line, &len, fd_sql)) != -1) {
tread += nread;
if (sql_str == NULL) {
sql_str = calloc(nread + 1, sizeof(char));
if (sql_str == NULL) {
r = errno;
fclose(fd_sql);
free(line);
free(path_sql);
db_close();
LOGFEV("Cannot allocate memory: %s", r, strerror(r));
}
strcpy(sql_str, line);
} else {
char *newptr = realloc(sql_str, (tread + 1) * sizeof(char));
if (newptr == NULL) {
r = errno;
fclose(fd_sql);
free(line);
free(sql_str);
free(path_sql);
db_close();
LOGFEV("Cannot allocate memory: %s", r, strerror(r));
}
sql_str = newptr;
strcat(sql_str, line);
}
}
fclose(fd_sql);
free(line);
r = sqlite3_exec(db, sql_str, NULL, NULL, &errmsg);
if (r) {
free(sql_str);
db_close();
LOGFV("%s", errmsg);
break;
}
free(sql_str);
}
free(path_sql);
}
void db_close(void) {
if (db == NULL)
return;
sqlite3_close(db);
db = NULL;
}
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