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/* dblayer.c - Database layer for ck -----------------------------------*- C -*-
*
* This file is part of ck, the config keeper
*
* -----------------------------------------------------------------------------
*
* Copyright (C) 2018 Anastasis Grammenos
* GPLv3 (see LICENCE for the full notice)
*
* -----------------------------------------------------------------------------
*
* Give access to the database.
*
* -------------------------------------------------------------------------- */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dblayer.h"
#include "ckutil.h"
const char * const DB_NAME = "/ckdb";
/* figure out the database name */
void make_db_name(char *ret, const char *confPath) {
char db_path[200];
strcpy(db_path, confPath);
strcat(db_path, DB_NAME);
strcpy(ret, db_path);
}
/* Check if the db file exists*/
int db_exists(const UserOpt *opt) {
char db_path[200];
make_db_name(db_path, opt->confDir);
return util_is_file_rw(db_path);
}
/* check if db has the correct tables */
int check_initialized_DB(sqlite3 *db) {
char *sql = "SELECT * FROM SQLITE_MASTER WHERE type='table';";
sqlite3_stmt *stmt;
int rc = sqlite3_prepare_v2(db, sql, strlen(sql), &stmt, NULL);
int program_table_ok, config_table_ok, rel_table_ok = 0;
while (sqlite3_step(stmt) != SQLITE_DONE) {
const unsigned char *tmpbuf = sqlite3_column_text(stmt, 1);
if (strcmp((char *)tmpbuf, "PROGRAM") == 0) {
program_table_ok = 1;
}
if (strcmp((char *)tmpbuf, "CONFIG") == 0) {
config_table_ok = 1;
}
if (strcmp((char *)tmpbuf, "REL") == 0) {
rel_table_ok = 1;
}
}
if (!program_table_ok
|| !config_table_ok
|| !rel_table_ok ) {
return 1;
}
sqlite3_finalize(stmt);
return 0;
}
DB empty_DB(SqlError err) {
return (DB){ .ptr = NULL, .error = err };
}
DB new_DB(sqlite3 *db) {
return (DB){ .ptr = db, .error = SQL_NO_ERR };
}
void close_DB(DB *db) {
sqlite3_close(db->ptr);
}
DB init_make_DB(const UserOpt *opt) {
sqlite3 *db;
char db_path[200];
int rc;
make_db_name(db_path, opt->confDir);
rc = sqlite3_open(db_path, &db);
if (rc != SQLITE_OK) {
return empty_DB(SQL_ERR_NO_DB_FILE);
}
return new_DB(db);
}
DB open_DB(const UserOpt *opt) {
sqlite3 *db;
int rc;
char db_path[200];
make_db_name(db_path, opt->confDir);
rc = sqlite3_open(db_path, &db);
if (rc) {
return empty_DB(SQL_ERR_NO_DB_FILE);
}
if (check_initialized_DB(db)) {
return empty_DB(SQL_ERR_NO_TABLES);
}
return new_DB(db);
}
void init_make_tables(DB *db) {
char * sql =
"CREATE TABLE REL("
"pId INT NOT NULL,"
"cId INT NOT NULL);"
"CREATE TABLE PROGRAM("
"id INT NOT NULL PRIMARY KEY,"
"name TEXT NOT NULL);"
"CREATE TABLE CONFIG("
"id INT NOT NULL PRIMARY KEY,"
"path TEXT NOT NULL,"
"secret INT NOT NULL,"
"prime INT NOT NULL);";
char *err_msg = NULL;
int rc = sqlite3_exec(db->ptr, sql, 0, 0, &err_msg);
if (rc != SQLITE_OK ) {
printf("SQL error: %s\n", err_msg);
sqlite3_free(err_msg);
db->error = SQL_ERR_SQLITE;
return;
}
}
int get_next_valid_id_from_table(DB *db, const char* tableName) {
sqlite3_stmt *stmt;
int rc;
char sql[100] = "SELECT id FROM ";
strcat(sql, tableName);
strcat(sql, " ORDER BY id;");
rc = sqlite3_prepare_v2(db->ptr, sql, -1, &stmt, 0);
if (rc != SQLITE_OK) {
return -1;
}
sqlite3_bind_text(stmt, 1, tableName, strlen(tableName), 0);
int id = 0;
while (sqlite3_step(stmt) == SQLITE_ROW) {
int a = sqlite3_column_int(stmt, 0);
if (a != id) {
break;
}
id++;
}
sqlite3_finalize(stmt);
return id;
}
void insert_to_program_table(DB *db, const char *name) {
sqlite3_stmt *stmt;
int rc;
char * sql =
"INSERT INTO PROGRAM VALUES(?, ?);";
rc = sqlite3_prepare_v2(db->ptr, sql, -1, &stmt, 0);
if (rc != SQLITE_OK) {
printf("Error\n");
return;
}
int id = get_next_valid_id_from_table(db, "PROGRAM");
if (id == -1) {
db->error = SQL_ERR_SQLITE;
return;
}
sqlite3_bind_int(stmt, 1, id);
sqlite3_bind_text(stmt, 2, name, strlen(name), 0);
if (sqlite3_step(stmt) != SQLITE_DONE) {
printf("Error\n");
return;
}
sqlite3_finalize(stmt);
}
int add_insert_program_to_db(DB *db, const char *name) {
insert_to_program_table(db,name);
return 0;
}
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