!/bin/bash

#
# (c) Frank Matthieß 2020
#
#

NAME=$(basename $0)
info() { echo "$*">&2; }
error() { info "ERROR: $*"; }

APIURL=https://api.opensensemap.org/boxes
TMPFILE=$(mktemp)
STIDFILE=$(mktemp)
trap 'rm -f ${TMPFILE} ${STIDFILE} ' INT EXIT

# At the map, click on an station icon and you get, for example, this url:
#  https://opensensemap.org/explore/5b4d11485dc1ec001b5452c7
#
# Add the id tring at the end of the url with a proper name to the sensor id list

# Sensor id list
cat<<EOSTIDS>$STIDFILE
5c22ef44919bf8001a10acc7    Berlin Charlottenburg
5a9c2087bc2d4100191d6ff9    Stuttgart Unteraichen (A8)
5b4d11485dc1ec001b5452c7    München Fakultät Informatik
EOSTIDS

#
#
# Adjust the field length of the output
llen=0
while read stid location; do
    l=$(wc -c <<< "$location")
    if [ $llen -lt $l ]; then
        llen=$l
    fi
done < $STIDFILE

#
# .. and get the need values via opensensemap api
#
while read stid location; do
    curl -sL ${APIURL}/${stid} > ${TMPFILE}
    reallocation=$(jq .name < ${TMPFILE})
    temperature=$(jq '.sensors[]  | select(.title|test("Temperatur")) | .title, .lastMeasurement.value, .unit' < ${TMPFILE} | xargs )
    humidity=$(jq '.sensors[]  | select(.title|test("rel. Luftfeuchte")) | .title, .lastMeasurement.value, .unit' < ${TMPFILE} | xargs )
    rawcoordinates=$(jq '.currentLocation.coordinates[]' < ${TMPFILE} | xargs )
    coordinates=$(while read lon lat heigh; do echo "https://www.openstreetmap.org/?mlat=${lat}&mlon=${lon}#map=12/${lat}/$lon"; done <<< "${rawcoordinates}")

    # 
    printf "%-${llen}s:\n\tStationsname : %s\n\t%s\n\t%s\n\tOpenstreetmap: %s\n"    \
        "${location}"               \
            "${reallocation//\"/}"      \
            "${temperature}"        \
            "${humidity}"           \
            "${coordinates}"

done < $STIDFILE

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