#!/bin/bash 

NAMETAG=$1
WXNAME=$2
WXAPIKEY=$3

WXAPRS="http://api.aprs.fi/api/get?name=$WXNAME&apikey=$WXAPIKEY&format=xml&what=wx"
WXFILE="/tmp/aprs.wx.xml"
TIMECASH=$(( 60 * 10 )) # 5  minut


NOW=$(( $(date -u +%s) - $TIMECASH ))
LASTTIME=$(( $(xmlstarlet sel -t -v "/xml/entries/entry/time" $WXFILE ) + 1 ))

if (( $NOW > $LASTTIME )) 
then
	rm $WXFILE
	wget $WXAPRS -O $WXFILE
fi

xmlstarlet sel -t -v "/xml/entries/entry/$NAMETAG" $WXFILE