Weather Script

[Christopher Moore]

Many of us use braille.wunderground.com to obtain weather forecasts.  I've
written a script which retrieves the forecast and prints selected data.
With no options you will get the temperature and conditions.  Flags for
additional may be specified as options to the script.  Run it without any
parameters to display the usage screen.  The script appears at the bottom
of this message and should be save in a file called "wx".  Don't forget to
give it execute permissions.  You can also pipe the output into festival,
flite or one of the commercially linux voices.

Enjoy!
Chris

***wx script follows***

#!/bin/sh
#  The following script uses lynx to retrieve the 
#  weather for the entered zipcode or city/state.
#  A simple awk program selects the fields to be displayed.
#  parse options using the getopts shell build-in.
while getopts "wdsny" NAME; do
  #echo "$NAME"
  #echo $OPTIND
  case $NAME in 
    "w") WFLAG="w";;
    "d") DFLAG="d";;
    "s") SFLAG="s";;
    "n") NFLAG="n";;
    "y") YFLAG="y";;
  esac
done
#echo "$# ${#WFLAG}"
if [ $((${#WFLAG} + ${#DFLAG} + ${#SFLAG}+ ${#NFLAG} + ${#YFLAG})) -gt 0 ]; then
  shift
fi
FLAGS="$WFLAG$DFLAG$SFLAG$NFLAG$YFLAG"
#echo $FLAGS
case $# in
    0) echo "Usage:"
       echo "    wx options <zipcode>"
       echo "  or" 
       echo "    wx options <city>,  <state>"
       echo "    where options are:"
       echo "    -w wind a dnwindchill"
       echo "    -d dewpoint and humidity"
       echo "    -s sunrise and sunset"
       echo "    -n normal high and low temp"
       echo "    -y yesterday\'s temps and degree days"
       echo "Example:  wx -dws boston, ma" 
       
       exit;;
    1) query=$1;;
    2) query=${1/%,}%2C+$2\";;
    3) query=${1}+${2/%,}%2C+$3\";;
esac
lynx -dump  http://braille.wunderground.com/cgi-bin/findweather/getForecast?query=${query}|\
awk -v flags=$FLAGS ' \
BEGIN {
  wflag = index(flags, "w")
  dflag = index(flags, "d")
  sflag = index(flags, "s")
  nflag = index(flags, "n")
  yflag = index(flags, "y")
  #print sflag
}
/^ *Observed/ { line = ""
               #print NF    
               sub(" *" $1 " +" $2 " +", "")
               line = line  $0 
               gsub(/,/, "", line)
               gsub(/$/, ",", line)
              } 
/^ *Temperature/ {t = $2
    #print NF  
    sub(/..$/, "", t)
    line = line " " t  
    }
/^ *Conditions/ {
           #print NF
           sub(" *" $1 " +", "")
           line = line " " $0
         }
/^ *Windchill/ {
  if (wflag > 0) {
    t = $2
    sub(/..$/, "", t)
    wline = $1 " " t
  }
}
/^ *Wind/ {
  if (wflag > 0) {
    direction = $2
    gsub(/N/, "North", direction)
    gsub(/E/, "East", direction)
    gsub(/S/, "South", direction)
    gsub(/W/, "West", direction)
    wline1 = $1 " " direction " " $3 " " $4 " " $5
  }
}
/^ *Dew/ {
  if (dflag > 0) {
    t = $3
    sub(/..$/, "", t)
    dline = $1 " " $2 " " t
  }
}
/^ *Humidity/ {
  if (dflag > 0) {
    dline1 = $1 " " $2
  }
}
/^ *Sunrise/ {
  if (sflag > 0) {
    sline = $1 " " $2 " " $3
  }
}
/^ *Sunset/ {
  if (sflag > 0) {
    sline1 = $1 " " $2 " " $3
  }
}
/^ *Normal high/ {
  if (nflag > 0) {
    t = $3
    sub(/..$/, "", t)
    nline1 = $1 " " $2 " " t
  }
}
/^ *Normal low/ {
  if (nflag > 0) {
    t = $3
    sub(/..$/, "", t)
    nline2 = $1 " " $2 " " t
  }
}
/^ *Record high/ {
  if (nflag > 0) {
    t = $3
    sub(/..$/, "", t)
    nline3 = $1 " " $2 " " t " in " $5
  }
}
/^ *Record low/ {
  if (nflag > 0) {
    t = $3
    sub(/..$/, "", t)
    nline4 = $1 " " $2 " " t " in " $5
  }
}
/^ *Yesterday.. Maximum/ {
  if (yflag > 0) {
    t = $3
    sub(/..$/, "", t)
    yline1 = $1 " " $2 " " t
  }
}
/^ *Yesterday.. Minimum/ {
  if (yflag > 0) {
    t = $3
    sub(/..$/, "", t)
    yline2 = $1 " " $2 " " t
  }
}
/^ *Yesterday.. Heating/ {
  if (yflag > 0) {
    yline3 = $0
  }
}
/^ *Yesterday.. Cooling/ {
  if (yflag > 0) {
    yline4 = $0
  }
}
END {
  print line 
  if (wflag > 0) { print wline1; print wline }
  if (dflag > 0) { print dline; print dline1 }
  if (sflag > 0) { print sline; print sline1 }
  if (nflag > 0) { print nline1; print nline2; print nline3; print nline4 }
  if (yflag > 0) {
    print yline1
    print yline2
    print yline3
    print yline4
  }
}'