147 lines
3.5 KiB
C++
147 lines
3.5 KiB
C++
#include "mysql.h"
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#include <fstream>
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#include "mysqld_error.h"
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#include "statement.h"
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constexpr const char* updateQuery = "UPDATE system SET `value` = ? WHERE `key` = 'version'";
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struct ResDeleter {
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void operator () (MYSQL_RES* res) {
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mysql_free_result(res);
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}
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};
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MySQL::MySQL():
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DBInterface(Type::mysql),
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connection(),
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login(),
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password(),
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database()
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{
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mysql_init(&connection);
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}
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MySQL::~MySQL() {
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mysql_close(&connection);
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}
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void MySQL::connect(const std::string& path) {
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if (state != State::disconnected)
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return;
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MYSQL* con = &connection;
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MYSQL* res = mysql_real_connect(
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con,
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NULL,
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login.c_str(),
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password.c_str(),
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database.empty() ? NULL : database.c_str(),
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0,
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path.c_str(),
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0
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);
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if (res != con)
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throw std::runtime_error(std::string("Error changing connecting: ") + mysql_error(con));
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state = State::connected;
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}
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void MySQL::setCredentials(const std::string& login, const std::string& password) {
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if (MySQL::login == login && MySQL::password == password)
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return;
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MySQL::login = login;
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MySQL::password = password;
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if (state == State::disconnected)
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return;
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MYSQL* con = &connection;
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int result = mysql_change_user(
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con,
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login.c_str(),
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password.c_str(),
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database.empty() ? NULL : database.c_str()
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);
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if (result != 0)
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throw std::runtime_error(std::string("Error changing credetials: ") + mysql_error(con));
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}
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void MySQL::setDatabase(const std::string& database) {
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if (MySQL::database == database)
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return;
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MySQL::database = database;
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if (state == State::disconnected)
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return;
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MYSQL* con = &connection;
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int result = mysql_select_db(con, database.c_str());
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if (result != 0)
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throw std::runtime_error(std::string("Error changing db: ") + mysql_error(con));
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}
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void MySQL::disconnect() {
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if (state == State::disconnected)
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return;
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MYSQL* con = &connection;
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mysql_close(con);
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mysql_init(con); //this is ridiculous!
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}
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void MySQL::executeFile(const std::string& path) {
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MYSQL* con = &connection;
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std::ifstream inputFile(path);
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std::string query;
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while (std::getline(inputFile, query, ';')) {
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int result = mysql_query(con, query.c_str());
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if (result != 0) {
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int errcode = mysql_errno(con);
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if (errcode == ER_EMPTY_QUERY)
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continue;
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throw std::runtime_error("Error executing file " + path + ": " + mysql_error(con));
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}
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}
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}
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uint8_t MySQL::getVersion() {
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MYSQL* con = &connection;
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int result = mysql_query(con, "SELECT value FROM system WHERE `key` = 'version'");
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if (result != 0) {
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unsigned int errcode = mysql_errno(con);
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if (errcode == ER_NO_SUCH_TABLE)
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return 0;
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throw std::runtime_error(std::string("Error executing retreiving version: ") + mysql_error(con));
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}
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std::unique_ptr<MYSQL_RES, ResDeleter> res(mysql_store_result(con));
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if (!res)
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throw std::runtime_error(std::string("Querying version returned no result: ") + mysql_error(con));
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MYSQL_ROW row = mysql_fetch_row(res.get());
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if (row)
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return std::stoi(row[0]);
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else
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return 0;
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}
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void MySQL::setVersion(uint8_t version) {
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std::string strVersion = std::to_string(version);
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Statement statement(&connection, updateQuery);
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statement.bind(strVersion.data(), MYSQL_TYPE_VAR_STRING);
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statement.execute();
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}
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