From 214f7247e1065c1b5bdcbba325290c911b048530 Mon Sep 17 00:00:00 2001
From: Grigory Shipunov <blame@oxapentane.com>
Date: Thu, 2 Jun 2022 18:02:54 +0200
Subject: [PATCH] dump-csv: only dump past hour of telegrams

---
 modules/data-hoarder/file_sharing.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/modules/data-hoarder/file_sharing.nix b/modules/data-hoarder/file_sharing.nix
index 20b0521..7588309 100644
--- a/modules/data-hoarder/file_sharing.nix
+++ b/modules/data-hoarder/file_sharing.nix
@@ -28,10 +28,11 @@
     script = ''
       cd /tmp
       TMPFILE=$(mktemp telegrams.XXXXX.csv.gz)
-      influx -precision rfc3339 -database dvbdump -execute "SELECT * FROM telegram_r_09" -format csv | gzip -c > $TMPFILE
+      TIMESTAMP=$(date +"%Y%m%d-%H%M")
+influx -precision rfc3339 -database dvbdump -execute "SELECT * FROM telegram_r_09 WHERE time > now()-1h" -format csv | gzip -c > $TMPFILE
       chmod a+r $TMPFILE
 
-      mv $TMPFILE /var/lib/data-accumulator/data/telegrams.csv.gz
+      mv $TMPFILE /var/lib/data-accumulator/data/telegrams-''${TIMESTAMP}.csv.gz
     '';
   };
   systemd.timers.dump-csv = {