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/*
* Created by yuuta on 11/28/21.
*/
#include "db.h"
#include "log.h"
#include "botd.h"
#include "utils.h"
#include <stdio.h>
#include <sqlite3.h>
#include <stdint.h>
struct upgrade {
const char *sql;
int (*pre_func)(void);
int (*post_func)(int);
};
static int upgrade_migrate_msg_index(int res);
static const struct upgrade sql_upgrades[] = {
{"CREATE TABLE 'says' ("
"'id' INTEGER PRIMARY KEY,"
"'t' TEXT NOT NULL UNIQUE,"
"'url' TEXT,"
"'msg' INTEGER NOT NULL"
");", NULL, NULL},
{"CREATE TABLE 'stats' ("
"'user' INTEGER UNIQUE,"
"'i' INTEGER NOT NULL,"
"PRIMARY KEY('user')"
");", NULL, NULL},
{"CREATE VIEW 'stat_global'"
"AS "
"SELECT * FROM (SELECT COUNT(user), SUM(i), MAX(i), AVG(i) FROM stats), (SELECT COUNT(msg) FROM says);",
NULL, NULL},
{"ALTER TABLE says ADD msg_index INTEGER;", NULL, upgrade_migrate_msg_index},
/* TDSQLite is 3.31, while ALTER TABLE DROP support begins from 3.35. */
/* {"ALTER TABLE says DROP COLUMN url;", NULL, NULL} */
{"ALTER TABLE says ADD public INTEGER DEFAULT 0;", NULL, NULL},
};
sqlite3 *db = NULL;
sqlite3_stmt *stmt_global_stat = NULL;
sqlite3_stmt *stmt_personal_stat = NULL;
sqlite3_stmt *stmt_search = NULL;
sqlite3_stmt *stmt_random = NULL;
static int upgrade_migrate_msg_index(int res) {
int r;
sqlite3_stmt *stmt = NULL;
sqlite3_stmt *stmt_set = NULL;
if ((r = sqlite3_prepare_v2(db, "SELECT id,url FROM says;", -1, &stmt, NULL))) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
if ((r = sqlite3_prepare_v2(db, "UPDATE says SET url = null, msg_index = ? WHERE id = ?;", -1, &stmt_set, NULL))) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
while ((r = sqlite3_step(stmt)) == SQLITE_ROW) {
int id = sqlite3_column_int(stmt, 0);
char *url = (char *) sqlite3_column_text(stmt, 1);
if (!url || !url[0]) {
continue;
}
uint32_t index = tg_url_get_index(url);
LOGIV("Migrating record %d (%s).", id, url);
if (!index) {
LOGFEV("Unknown URL: %s", 1, url);
}
if ((r = sqlite3_bind_int64(stmt_set, 1, index))) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
if ((r = sqlite3_bind_int(stmt_set, 2, id))) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
if ((r = sqlite3_step(stmt_set)) != SQLITE_DONE) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
if (sqlite3_changes(db) != 1) {
LOGFEV("Cannot upgrade DB: Missing %d.", 1, id);
}
if ((r = sqlite3_reset(stmt_set))) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
}
if (r != SQLITE_DONE) {
LOGFEV("Cannot upgrade DB: %s", r, sqlite3_errstr(r));
}
sqlite3_finalize(stmt);
sqlite3_finalize(stmt_set);
return 0;
}
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 */
if ((r = sqlite3_exec(db, "PRAGMA foreign_keys = ON", NULL, NULL, &errmsg))) {
goto sql_err;
sql_err:
db_close();
LOGFEV("%s", r, errmsg);
}
/* Get user_version */
sqlite3_stmt *stmt;
if ((r = sqlite3_prepare_v2(db, "PRAGMA user_version", -1, &stmt, NULL))) {
goto sql_err;
}
if ((r = sqlite3_step(stmt)) != SQLITE_ROW) {
errmsg = (char *) sqlite3_errstr(r);
sqlite3_finalize(stmt);
goto sql_err;
}
int current_var = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
for (; current_var < sizeof(sql_upgrades) / sizeof(struct upgrade); current_var++) {
const int to = current_var + 1;
const struct upgrade *upg = &sql_upgrades[current_var];
LOGIV("Upgrading SQL schema from %d to %d.",
current_var,
to);
/* Pre / post functions return values are currently unused. */
if (upg->pre_func) {
upg->pre_func();
}
/* TRY to do that anyway, if we have a post-fun. */
r = sqlite3_exec(db, upg->sql, NULL, NULL, &errmsg);
if (upg->post_func) {
if (r) {
LOGEV("Error while executing upgrade: %s, continuing anyway", errmsg);
sqlite3_free(errmsg);
}
upg->post_func(r);
} else if (r) {
goto sql_err;
}
char sql[60];
sprintf(sql, "PRAGMA user_version = %d;", to);
if ((r = sqlite3_exec(db, sql, NULL, NULL, &errmsg))) {
goto sql_err;
}
}
/* Prepare statements */
if ((r = sqlite3_prepare_v2(db, "SELECT * FROM stat_global;", -1, &stmt_global_stat, NULL))) {
errmsg = (char *) sqlite3_errstr(r);
goto sql_err;
}
if ((r = sqlite3_prepare_v2(db, "SELECT * FROM (SELECT i FROM stats WHERE user = ?), (SELECT COUNT(i) FROM stats WHERE i >= (SELECT i FROM stats WHERE user = ?)), (SELECT COUNT(i) FROM stats)", -1, &stmt_personal_stat, NULL))) {
errmsg = (char *) sqlite3_errstr(r);
goto sql_err;
}
if ((r = sqlite3_prepare_v2(db, "SELECT id, t, msg_index FROM says WHERE t LIKE ? LIMIT 10;",
-1,
&stmt_search,
NULL))) {
errmsg = (char *) sqlite3_errstr(r);
goto sql_err;
}
if ((r = sqlite3_prepare_v2(db, "SELECT id, t, msg_index FROM says ORDER BY RANDOM() LIMIT 10;",
-1,
&stmt_random,
NULL))) {
errmsg = (char *) sqlite3_errstr(r);
goto sql_err;
}
}
void db_close(void) {
if (db == NULL)
return;
if (stmt_global_stat) {
sqlite3_finalize(stmt_global_stat);
stmt_global_stat = NULL;
}
if (stmt_personal_stat) {
sqlite3_finalize(stmt_personal_stat);
stmt_personal_stat = NULL;
}
if (stmt_random) {
sqlite3_finalize(stmt_random);
stmt_random = NULL;
}
if (stmt_search) {
sqlite3_finalize(stmt_search);
stmt_search = NULL;
}
sqlite3_close(db);
db = NULL;
}
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