From: Scott Worley <scottworley@scottworley.com>
Date: Tue, 10 Oct 2023 22:45:38 +0000 (-0700)
Subject: server: Combine ago & clock to get original event time
X-Git-Tag: v0.1.0~15
X-Git-Url: http://git.scottworley.com/tattlekey/commitdiff_plain/f9625e91cfed21a65b720609ed1d8a7e7c0f36bd?hp=143d53ed1d795c5c5f6e0773ab3c71700d3ef9a0

server: Combine ago & clock to get original event time
---

diff --git a/server/src/main.rs b/server/src/main.rs
index c4c0b19..c31f873 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -15,6 +15,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 use std::net::UdpSocket;
+use std::time::{Duration, SystemTime};
 
 const MESSAGE_SIZE: usize = 12;
 
@@ -29,17 +30,20 @@ struct MessageKey {
 struct Message {
     key: MessageKey,
     ago: u32,
+    t: SystemTime,
 }
 
 impl From<&[u8; MESSAGE_SIZE]> for Message {
     fn from(value: &[u8; MESSAGE_SIZE]) -> Self {
+        let ago = u32::from_be_bytes(value[8..=11].try_into().expect("I can't count"));
         Self {
             key: MessageKey {
                 epoch: u32::from_be_bytes(value[0..=3].try_into().expect("I can't count")),
                 device: u16::from_be_bytes(value[4..=5].try_into().expect("I can't count")),
                 seq: u16::from_be_bytes(value[6..=7].try_into().expect("I can't count")),
             },
-            ago: u32::from_be_bytes(value[8..=11].try_into().expect("I can't count")),
+            ago,
+            t: SystemTime::now() - Duration::new(ago.into(), 0),
         }
     }
 }