Save video under batch counting date; fix retention timezone

src/video_writer.cpp

@@ -41,7 +41,7 @@ void VideoBatchWriter::cleanup_retention() {
     auto cutoff = std::chrono::system_clock::now() - std::chrono::hours(retention_days_ * 24);
     auto cutoff_t = std::chrono::system_clock::to_time_t(cutoff);
     std::ostringstream cutoff_ss;
-    cutoff_ss << std::put_time(std::gmtime(&cutoff_t), "%Y-%m-%d");
+    cutoff_ss << std::put_time(std::localtime(&cutoff_t), "%Y-%m-%d");
     std::string cutoff_str = cutoff_ss.str();
 
     for (const auto& entry : fs::directory_iterator(output_dir_)) {
@@ -86,8 +86,9 @@ void VideoBatchWriter::note_ayam_detection() {
     }
 }
 
-void VideoBatchWriter::on_batch_closed(int batch_number) {
+void VideoBatchWriter::on_batch_closed(int batch_number, const std::string& counting_date) {
     current_batch_ = batch_number;
+    current_date_ = counting_date;
     if (state_ == CONFIRMED) {
         state_ = STOPPING;
         state_start_ = std::chrono::steady_clock::now();
@@ -175,7 +176,7 @@ void VideoBatchWriter::stop_and_move(int batch_number) {
     std::string src = current_path_;
     current_path_.clear();
 
-    std::string day_dir = output_dir_ + "/" + today_str();
+    std::string day_dir = output_dir_ + "/" + (current_date_.empty() ? today_str() : current_date_);
     ensure_dir(day_dir);
 
     std::ostringstream name;
@@ -205,7 +206,7 @@ void VideoBatchWriter::shutdown() {
         current_path_.clear();
 
         if (prev_state == CONFIRMED || prev_state == STOPPING) {
-            std::string day_dir = output_dir_ + "/" + today_str();
+            std::string day_dir = output_dir_ + "/" + (current_date_.empty() ? today_str() : current_date_);
             ensure_dir(day_dir);
             std::string dst = day_dir + "/" +
                 fs::path(src).filename().string();