#!/bin/bash

# areacode--Given a three-digit US telephone area code, identifies the city
#   and state using the simple tabular data at Bennet Yee's website.

setglobal source = '"http://www.bennetyee.org/ucsd-pages/area.html'"

if test -z $1  {
  echo "usage: areacode <three-digit US telephone area code>"; exit 1
}

# wc -c returns characters + end of line char, so 3 digits = 4 chars
if test $[echo $1 | wc -c] -ne 4  {
  echo "areacode: wrong length: only works with three-digit US area codes"; exit 1
}

# Are they all digits?
if test ! -z $[echo $1 | sed 's/[[:digit:]]//g]  {
  echo "areacode: not-digits: area codes can only be made up of digits"; exit 1
}

# Now, finally, let's look up the area code...

setglobal result = $[curl -s -dump $source | grep "name=\"$1" | \
  sed 's/<[^>]*>//g;s/^ //g' | \
  cut -f2- -d' '| cut -f1 -d'(']

echo "Area code $1 =$result"

exit 0