#!/bin/bash
# wut-water-range
# Usage:
# wut-water-range [Observation ID Minumum]  [Observation ID Maximum]
# Example:
# wut-water-range 1292461 1470525
# Download Observation: JSON and waterfall. Not audio or data files.
# This will download the observation on the command line and every one before it.
#
# The last observation to start in 2019 was 1470525
# The last observation to start in 2019-11 was 1292461
# NOTE! Observations are not in numerical order by chronology.
# It looks like it is ordered by scheduling, so an older observation can have
# a higher observation ID.
#
# So to get mostly all of the observations in December, 2019, run:
# wut-water-range 1292461 1470525
# Resume:
# wut-water-range 1359119 1470525
#
# XXX Should check input is sane...

APIURL="https://network.satnogs.org/api"
DOWNDIR="/srv/satnogs/download"
OBSIDMIN="$1"
OBSIDMAX="$2"
OBSID=$OBSIDMIN

cd $DOWNDIR || exit

# Download JSON
while [ $OBSID -lt $OBSIDMAX ]
	do echo "ID: $OBSID"
	mkdir -p $OBSID
	cd $OBSID
	# Download if is isn't there already
	[ ! -f $OBSID.json ] && curl					\
		--http2 --ipv4						\
		--silent						\
		--output $OBSID.json					\
		"$APIURL/observations/?id=$OBSID&ground_station=&satellite__norad_cat_id=&transmitter_uuid=&transmitter_mode=&transmitter_type=&vetted_status=&vetted_user=&start=&end=" && sleep `echo $((0 + RANDOM % 1))`
	WATERURL=`cat $OBSID.json | jq --compact-output '.[0] | {waterfall}' | cut -f 2- -d : | sed -e 's/}//g' -e 's/http:/https:/g' -e 's/"//g'`
	WATERFILE=`basename $WATERURL`
	[ ! -f "$WATERFILE" ] &&					\
	curl								\
		--silent						\
		--http2 --ipv4						\
		--continue-at -						\
		--remote-time						\
		--output $WATERFILE					\
		$WATERURL && sleep `echo $((0 + RANDOM % 1))`
	cd ..
	let OBSID=$OBSID+1
done

exit 0