Add function to report devices activity

central_backend/src/utils/time_utils.rs

@@ -22,6 +22,11 @@ pub fn day_number(time: u64) -> u64 {
     time / (3600 * 24)
 }
 
+/// Get current day number
+pub fn curr_day_number() -> u64 {
+    day_number(time_secs())
+}
+
 /// Get current hour, 00 => 23 (local time)
 pub fn curr_hour() -> u32 {
     let local: DateTime<Local> = Local::now();