Monitor the charging station at the Raleigh City Center parking deck and report its status to Google Chat

ccmonitor.sh

#!/bin/bash

. ./.cccreds

function ccstatus {
   curl -X POST \
        http://periscope.raleighnc.gov/periscopeApi/sustainability.getEvFocusXml \
        --data-binary '<str name="val" val="" />' \
        -H 'Content-type: text/xml' \
        --compressed \
        --output - --silent | \
        xpath -q -e '//s[@name="City Center"]/@status' | \
        cut -f 2 -d\" || :
}
LAST_STATUS=$(ccstatus 2>/dev/null)
NO_DATA_COUNTER=0
echo `date` $LAST_STATUS
while true; do 
   STATUS=$(ccstatus 2>/dev/null)
   if [ -z "$STATUS" ] ; then
      NO_DATA_COUNTER=$((NO_DATA_COUNTER+1))
      if [ "$NO_DATA_COUNTER" -gt 10 ] ; then
         # Until 5 minutes has passed, we'll just ignore the no data errors.  After that, it becomes reportable
         STATUS="No data"
      fi
   else
      NO_DATA_COUNTER=0
   fi
   if [ ! -z "$STATUS" ] && [ "$LAST_STATUS" != "$STATUS" ] ; then
      echo `date` $STATUS
      # curl "$IFTTT_ENDPOINT" --silent -X POST -H 'Content-type: application/json' --data-binary "{\"value1\":\"${STATUS}\"}" >/dev/null
      curl "$GCHAT_ENDPOINT" --silent -X POST -H "Content-type:application/json" --data-binary "{\"thread\":{\"name\":\"spaces/AAAAQm3fN4s/threads/WQsgXxKwsmI\"},\"text\":\
"${STATUS}\"}" >/dev/null
      LAST_STATUS="$STATUS"
   fi
   sleep 30
done