poll.bash

#!/usr/bin/env bash

while true
do

    DAYOFMONTH=`date +"%d"`
    DAYOFEVENT=`expr $DAYOFMONTH - 27` # adjusts for 0-indexing of array

    echo -n "Reloading schedule... "

    curl https://static.rc3.world/schedule/everything.json | jq ".schedule.conference.days[$DAYOFEVENT].rooms | {\"Chaosstudio Hamburg\", \"FeM Channel\", \"Haecksen Stream\", \"r3s - Monheim/Rhein\", \"Chaos-West TV\", \"ChaosZone TV\", \"Lichtung\", \"about:future stage\"}" > current.json

    echo -n "comparing... "

    diff old.json current.json | grep 'guid\|date\|start\|duration\|room\|title' > poll.diff

    FSIZE=`stat --printf="%s" poll.diff`

    if [ $FSIZE -gt 1 ]
    then
        notify-send "FAHRPLAN UPDATE!"
        cp poll.diff `date -Iseconds`.diff
    fi

    mv current.json old.json

    echo "done"

    sleep 300 # 5 minutes

done