1 files changed, 22 insertions, 0 deletions

diff --git a/tools/osm/sequence_number.sh b/tools/osm/sequence_number.sh
new file mode 100755
index 0000000..eb365d0
--- /dev/null
+++ b/tools/osm/sequence_number.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# $1 as --hour or --minute, $2 as timestamp
+# return the latest sequence number
+
+case $1 in
+    # hour difference with Tue Jun 4 03:00:00 UTC 2019
+    # sequence number=58940
+    --hour)
+    echo $[($2 - 1559617200)/3600 + 58940]
+    ;;
+
+    # minute difference with latest planet state file
+    --minute)
+    benchmark=benchmark
+    curl https://planet.openstreetmap.org/replication/minute/state > $benchmark
+    timeString=$(tail -1 $benchmark | tr -d 'timestamp=\\')
+    timestamp=$(date -d "$timeString" +%s)
+    seq=$(sed -n 2p $benchmark | tr -d "sequenceNumber=")
+    rm $benchmark
+    echo $[$seq - ($timestamp - $2)/60 - 1 ]
+esac