nedko/trmnl_server_cpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Added image filename implementation

Browse Source
This commit is contained in:
nedko
2026-06-25 17:44:58 +03:00
parent 025cd56500
commit 9e00821802
1 changed files with 80 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
main.cpp
View File

@@ -1,3 +1,6 @@
// Start using chrono when C++20 becomes available
// #include <chrono>
#include <filesystem>
#include <iostream>
#include <list>
#include <map>
@@ -8,7 +11,13 @@
#include <utility>
#include <vector>
#include <stdio.h>
#include <stdint.h>
#include <time.h>
// Stop using these when C++20 becomes available
#include <fcntl.h>
#include <sys/stat.h>
#include "httplib.h"
#include "json.hpp"
@@ -19,6 +28,7 @@
using nlohmann::json;
using namespace std;
namespace fs = std::filesystem;
constexpr int API_KEY_LENGHT = 16;
constexpr char DEFAULT_IMAGE_URL[] = "https://trmnl.com/images/setup/setup-logo.bmp";
@@ -92,6 +102,54 @@ bool reload_container(TRMNLContainer& container, const string& filename)
return true;
}
string get_timestamp_from_filename(const string& filepath)
{
char result[128] = "";
struct stat status;
stat(filepath.c_str(), &status);
// Time of last modification
time_t file_time = status.st_mtim.tv_sec;
tm* file_tm;
file_tm = gmtime(&file_time);
snprintf(result, sizeof(result) - 1, "%04d-%02d-%02dT%02d:%02d:%02d",
file_tm->tm_year + 1900,
file_tm->tm_mon + 1,
file_tm->tm_mday,
file_tm->tm_hour,
file_tm->tm_min,
file_tm->tm_sec
);
return result;
}
// Use this when C++20 becomes available
#if 0
string get_timestamp_from_file_time(const fs::file_time_type& ftime)
{
char result[128] = "";
time_t file_time = std::chrono::system_clock::to_time_t(std::chrono::file_clock::to_sys(ftime));
tm* file_tm;
file_tm = gmtime(&file_time);
snprintf(result, sizeof(result) - 1, "%04d-%02d-%02dT%02d:%02d:%02d",
file_tm->tm_year + 1900,
file_tm->tm_mon + 1,
file_tm->tm_mday,
file_tm->tm_hour,
file_tm->tm_min,
file_tm->tm_sec
);
return result;
}
#endif
// First string is image filename for URL
// Second string is timestamp for TRMNL filename
pair<string, string> find_image_for_friendly(const string& folder_images, const string& friendly_id)
@@ -99,7 +157,22 @@ pair<string, string> find_image_for_friendly(const string& folder_images, const
pair<string, string> result = {"", ""};
set<string> permitted_extensions = { ".bmp", ".png" };
// TODO: Implement
if (!fs::is_directory(folder_images))
{
return result;
}
for (const fs::directory_entry& entry : fs::directory_iterator(folder_images))
{
if ((entry.path().stem() == friendly_id) &&
(0 != permitted_extensions.count(entry.path().extension())))
{
result.first = entry.path().filename();
result.second = get_timestamp_from_filename(entry.path());
// Change to this when C++20 becomes available
// result.second = get_timestamp_from_file_time(entry.last_write_time());
}
}
return result;
}
@@ -170,6 +243,12 @@ int main(int argc, char **argv)
return -1;
}
if (!fs::is_directory(folder_images))
{
cout << "filepath for images is not a folder" << endl;
return -1;
}
if (!cert_file.empty() && !key_file.empty())
{
// TODO: Implement SSL Server Properly