bbcweather.sh

#! /bin/bash
file=bbc.xml
sfile=short_bbc.txt
date=last_date.txt
dir=/home/alexandr/xml/weather/almaty/bbc/
sed=/home/alexandr/xml/weather/almaty/sed.bbc
log=/var/log/bbc_weather.log
val=values.txt
wait=1800 #wait 30 minutes if date has not been updated in xml

cd $dir
lastdate="`cat $date`"
wget -qO - http://newsrss.bbc.co.uk/weather/forecast/140/Next3DaysRSS.xml > $file
cur_date="`cat $file | grep "pubDate" | head -1 | sed -e "s/<pubDate>//g" -e "s/<\/pubDate>//g"`"

count=3
while [[ ("$cur_date" == "$lastdate") && ($count > 0) ]]
do
  count=$[ $count-1 ]
  echo "`date -R`: Date has not been updated ($count time(s) left to try): $lastdate" >> $log
  if [ $count != 0 ]; then
    sleep $wait
    wget -qO - http://newsrss.bbc.co.uk/weather/forecast/140/Next3DaysRSS.xml > $file
    cur_date="`cat $file | grep "pubDate" | head -1 | sed -e "s/<pubDate>//g" -e "s/<\/pubDate>//g"`"
  else
    exit
  fi
done

echo $cur_date > $date
echo "`date -R`: New pubDate loaded: $cur_date" >> $log

count=1
grep "<title\|<description" $file | grep -v "Weather Centre" | sed -f $sed > $sfile
while read line
do
  #echo $line
  OLD_IFS=$IFS
  IFS=","
  ar=( $line )
  IFS=$OLD_IFS
  if [[ ${#ar[@]} > 4 ]]; then
    echo -en ${ar[2]} > $count'Wdir'
      grep -q "${ar[2]}" $val || echo ${ar[2]} >> $val
    echo ${ar[3]} | sed -e s/mph//g | python -c "print int(round(float(raw_input())*0.44704))" | tr -d "\n" > $count'Wspd'
    echo -en ${ar[4]} > $count'Visb'
      grep -q "${ar[4]}" $val || echo ${ar[4]} >> $val
    #echo -en ${ar[5]} > Pressure in mb
    echo -en ${ar[6]} > $count'Humd'
    echo -en ${ar[7]} > $count'Sris'
    echo -en ${ar[8]} > $count'Sset'
    count=$[ $count+1 ]
  else
    #day of the week determination
    case ${ar[0]} in
      "Sunday")
        echo -en day-0 > $count'Wday'
        ;;
      "Monday")
        echo -en day-1 > $count'Wday'
        ;;
      "Tuesday")
        echo -en day-2 > $count'Wday'
        ;;
      "Wednesday")
        echo -en day-3 > $count'Wday'
        ;;
      "Thursday")
        echo -en day-4 > $count'Wday'
        ;;
      "Friday")
        echo -en day-5 > $count'Wday'
        ;;
      "Saturday")
        echo -en day-6 > $count'Wday'
        ;;
    esac
    echo -en ${ar[1]} > $count'Prec'
      grep -q "${ar[1]}" $val || echo ${ar[1]} >> $val
    echo -en ${ar[2]} > $count'Tmax'
    echo -en ${ar[3]} > $count'Tmin'
  fi
done < $sfile