From fe71d498b56055525c0dc2d72a092a98f677ddb8 Mon Sep 17 00:00:00 2001
From: uvos <devnull@uvos.xyz>
Date: Thu, 23 May 2024 17:31:21 +0200
Subject: [PATCH] inital commit

---
 CMakeLists.txt |   7 ++++
 main.cpp       | 112 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 main.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..90aa913
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.20)
+
+project(infinilog LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(${PROJECT_NAME} main.cpp)
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..bcc0fcc
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,112 @@
+#include <iostream>
+#include <fstream>
+#include <cstdint>
+#include <vector>
+#include <filesystem>
+#include <ctime>
+#include <algorithm>
+
+static constexpr uint8_t magic[] = {0xf6, 0x76, 0xd8, 0x09};
+
+struct __attribute__((packed)) Frame {
+	uint64_t time;
+	uint32_t steps;
+	uint8_t batteryPercent;
+	uint8_t heartRate;
+	uint8_t pad[2];
+};
+
+bool arrayeq(const uint8_t* a, const uint8_t* b, size_t len)
+{
+	for(size_t i = 0; i < len; ++i)
+	{
+		if(a[i] != b[i])
+			return false;
+	}
+
+	return true;
+}
+
+std::vector<Frame> readFile(const std::filesystem::path& path)
+{
+	std::ifstream file;
+	file.open(path, std::ios_base::binary | std::ios_base::in);
+	if(!file.is_open())
+	{
+		std::cout<<"could not open "<<path<<'\n';
+		return {};
+	}
+
+	uint8_t magicRef[4];
+	file.read(reinterpret_cast<char*>(&magicRef), 4);
+
+	if(!arrayeq(magic, magicRef, 4))
+	{
+		std::cout<<path<<" is not a valid infitime log file\n";
+		return {};
+	}
+
+	uint8_t versionMajor;
+	uint8_t versionMinor;
+	file.read(reinterpret_cast<char*>(&versionMajor), 1);
+	file.read(reinterpret_cast<char*>(&versionMinor), 1);
+
+	if(versionMajor > 1 || file.bad())
+	{
+		std::cout<<path<<" is a file of version "<<versionMajor<<'.'<<versionMinor<<" this application supports only versions 1.x and below\n";
+		return {};
+	}
+
+	uint16_t size;
+	file.read(reinterpret_cast<char*>(&size), sizeof(size));
+
+	if(sizeof(Frame) != size)
+	{
+		std::cout<<path<<" contains frames of an unexpected size\n";
+		return {};
+	}
+
+	uint32_t length;
+	file.read(reinterpret_cast<char*>(&length), sizeof(length));
+
+	std::vector<Frame> frames;
+	frames.reserve(length);
+
+	for(size_t i = 0; i < length && !file.bad(); ++i)
+	{
+		Frame frame = {};
+		file.read(reinterpret_cast<char*>(&frame), sizeof(frame));
+
+		if(frame.time != 0)
+			frames.push_back(frame);
+	}
+
+	std::sort(frames.begin(), frames.end(), [](const Frame& a, const Frame& b){return a.time < b.time;});
+	return frames;
+}
+
+int main(int argc, char** argv)
+{
+	if(argc < 2)
+	{
+		std::cout<<"Usage: "<<(argc > 0 ? argv[0] : "infinilog")<<" [LOG_FILE]\n";
+		return 1;
+	}
+
+	std::vector<Frame> frames = readFile(argv[1]);
+
+	if(frames.empty())
+		return 1;
+
+	std::cout<<"timestamp, steps, battery percent, heart rate\n";
+	for(auto& frame : frames) {
+		std::time_t time = frame.time;
+		std::tm* ptm = std::localtime(&time);
+		char timeBuffer[32];
+		std::strftime(timeBuffer, 32, "%a, %d.%m.%Y %H:%M:%S", ptm);
+
+		std::cout<<timeBuffer<<", "<<frame.steps<<", "<<static_cast<int>(frame.batteryPercent)<<", "<<static_cast<int>(frame.heartRate)<<'\n';
+	}
+
+	return 0;
+}