Logger.cpp

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/*
   Copyright 2022 Rishi Challa
 
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
 
       http://www.apache.org/licenses/LICENSE-2.0
 
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
 
#include "Logger.hpp"
 
#include <Kale/Core/Application/Application.hpp>
 
#include <filesystem>
 
// Apple-clang doesn't support C++20's std::format properly
#if defined(KALE_OSX) || defined(KALE_IOS)
 
#include <date/date.h>
#include <date/tz.h>
 
#else
 
#include <format>
#include <chrono>
 
#endif
 
using namespace Kale;
 
Logger::Logger() {
#ifdef KALE_DEBUG
    std::cout.setf(std::ios::fixed, std::ios::floatfield);
    std::cout.setf(std::ios::showpoint);
#endif
}
 
void Logger::load(const std::string& applicationName) {
 
    // Create the folder for this application if it doesn't already exist
    if (!std::filesystem::exists("." + applicationName))
        std::filesystem::create_directory("." + applicationName);
    if (!std::filesystem::exists("." + applicationName + "/logs"))
        std::filesystem::create_directory("." + applicationName + "/logs");
 
    // Create/open the log file in the correct folder
    #ifdef KALE_OSX
    logFile.open("." + applicationName + "/logs/" + date::format("%F--%H-%M", std::chrono::system_clock::now()) + ".log");
    #else
    auto timestamp = std::chrono::time_point_cast<std::chrono::seconds>(std::chrono::system_clock::now());
    logFile.open("." + applicationName + "/logs/" + std::format("{:%F--%H-%M}", std::chrono::zoned_time{std::chrono::current_zone(), timestamp}) + ".log");
    #endif
 
    #ifdef KALE_WINDOWS
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    if (hOut == INVALID_HANDLE_VALUE) {
        return;
    }
 
    DWORD dwMode = 0;
    if (!GetConsoleMode(hOut, &dwMode)) {
        return;
    }
 
    dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
    if (!SetConsoleMode(hOut, dwMode)) {
        return;
    }
    #endif
}
 
std::string Logger::getTimePrefix() {
    #ifdef KALE_OSX
    // OSX Doesn't support C++ 20's std::format and std::chrono::zoned_time
    return date::format("%I:%M %p", date::make_zoned(date::current_zone(), std::chrono::system_clock::now()));
    #else
    auto timestamp = std::chrono::time_point_cast<std::chrono::seconds>(std::chrono::system_clock::now());
    return std::format("{:%I:%M %p}", std::chrono::zoned_time{std::chrono::current_zone(), timestamp});
    #endif
}