lmdbal/exceptions.cpp

// Squawk messenger.
// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "exceptions.h"

DataBase::Exception::Exception():
std::exception()
{}

DataBase::Exception::~Exception() {}

const char* DataBase::Exception::what() const noexcept( true )
{
    std::string* msg = new std::string(getMessage());
    return msg->c_str();
}

DataBase::Directory::Directory(const std::string& p_path):
    Exception(),
    path(p_path) {}

std::string DataBase::Directory::getMessage() const {
    return "Can't create directory for database at " + path;}

DataBase::Closed::Closed(
    const std::string& p_operation,
    const std::string& p_dbName,
    const std::optional<std::string>& p_tableName
):
    Exception(),
    operation(p_operation),
    dbName(p_dbName),
    tableName(p_tableName) {}

std::string DataBase::Closed::getMessage() const {
    std::string msg = "An attempt to perform operation " + operation
                    + " on closed database " + dbName;
    if (tableName.has_value()) {
        msg += + " on table " + tableName.value();
    }
    return msg;

}

DataBase::Opened::Opened(const std::string& p_dbName, const std::string& p_action):
    Exception(),
    dbName(p_dbName),
    action(p_action) {}


std::string DataBase::Opened::getMessage() const {
    return "An attempt to " + action
            + " (the database " + dbName
            + ") but it's can't be done because the DataBase is already opened";
}

DataBase::NotFound::NotFound(
    const std::string& p_key,
    const std::string& p_dbName,
    const std::string& p_tableName
):
    Exception(),
    key(p_key),
    dbName(p_dbName),
    tableName(p_tableName) {}

std::string DataBase::NotFound::getMessage() const {
    return "Element for id " + key + " wasn't found "
            + " in database " + dbName
            + " in table " + tableName;}

DataBase::Exist::Exist(
    const std::string& p_key,
    const std::string& p_dbName,
    const std::string& p_tableName
):
    Exception(),
    key(p_key),
    dbName(p_dbName),
    tableName(p_tableName) {}

std::string DataBase::Exist::getMessage() const {
    return "An attempt to insert element with key " + key
            + " to database " + dbName
            + " to table " + tableName
            + " but it already has an element with given id";
}

DataBase::Unknown::Unknown(
    const std::string& p_dbName,
    const std::string& message,
    const std::optional<std::string>& p_tableName
):
    Exception(),
    dbName(p_dbName),
    tableName(p_tableName),
    msg(message) {}

std::string DataBase::Unknown::getMessage() const
{
    std::string result = "Unknown error in database " + dbName;
    if (tableName.has_value()) {
        result += " in table " + tableName.value();
    }
    result += ": " + msg;
    return result;
}