Logger.cpp

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/*
 * Copyright (C) 2016-2019 Istituto Italiano di Tecnologia (IIT)
 *
 * This software may be modified and distributed under the terms of the
 * BSD 3-Clause license. See the accompanying LICENSE file for details.
 */
 
#include <BayesFilters/Logger.h>
 
#include <iostream>
 
using namespace bfl;
 
 
Logger::~Logger() noexcept
{
    if (log_enabled_)
        disable_log();
}
 
 
bool Logger::enable_log(const std::string& folder_path, const std::string& file_name_prefix)
{
    if (!log_enabled_)
    {
        const std::vector<std::string>& file_names = log_file_names(folder_path, file_name_prefix);
 
        if (file_names.size() == 0)
        {
            std::cerr << "WARNING::LOGGER::ENABLELOG\n";
            std::cerr << "\tWARNING: Log facility could not be started due to missing file names." << std::endl;
 
            return false;
        }
 
        folder_path_ = folder_path;
        file_name_prefix_ = file_name_prefix;
 
        auto file_name = file_names.begin();
        for (size_t i = 0; i < file_names.size(); ++i, ++file_name)
        {
            log_files_.emplace_back(std::ofstream(*file_name + ".txt", std::ofstream::out | std::ofstream::app));
 
            if (!log_files_[i].is_open())
            {
                std::cerr << "WARNING::LOGGER::ENABLELOG\n";
                std::cerr << "\tWARNING: Log facility could not be started for file " + *file_name + ".txt." << std::endl;
 
                log_files_.clear();
 
                file_names_.clear();
 
                return false;
            }
 
            file_names_.emplace_back(*file_name);
        }
 
        log_enabled_ = true;
 
        return true;
    }
    else
        return false;
}
 
 
bool Logger::disable_log()
{
    if (log_enabled_)
    {
        log_files_.clear();
 
        file_names_.clear();
 
        log_enabled_ = false;
 
        return true;
    }
    else
        return false;
}
 
 
std::string Logger::get_folder_path() const
{
    return folder_path_;
}
 
 
std::string Logger::get_file_name_prefix() const
{
    return file_name_prefix_;
}
 
 
std::vector<std::string> Logger::log_file_names(const std::string& folder_path, const std::string& file_name_prefix)
{
    static_cast<void>(folder_path);
    static_cast<void>(file_name_prefix);
 
    std::cerr << "WARNING::LOGGER::LOG_FILENAMES\n";
    std::cerr << "\tWARNING: Log file names where not provided. Did you override `log_file_names()`?" << std::endl;
 
    return {};
}
 
 
void Logger::log()
{ }