#!/bin/sh -u
# Fetch the current temperature for a given airport city code
# --------------
# Syntax:    $0 airport_code
# --------------
# Purpose:
#   Given an Environment Canada 3-letter city code argument, fetch the
#   weather page for that city, extract and display the temperature.
#   Bonus: Extract the city name too.
# --------------
#Student Name:                 Ben Dover
#Algonquin EMail Address:      abcd0001
#Student Number:               074-210-779 
#Course Number:                DAT2330  
#Lab Section Number:           014 
#Professor Name:               Ian Allen 
#Assignment Name/Number/Date:  Exercise #3 due March 9, 2004
#Comment:                      number two of two files for this exercise

# Set a standard search PATH and friendly umask
#
PATH=/bin:/usr/bin ; export PATH
umask 022

# Fetch the weather using the Environment Canada URL.
# Use a unique tmp file name in /tmp to hold the fetched weather page.
# (Note the need to quote the URL because of the shell metacharacter.)
#
tmpfile=/tmp/weather$USER.$$
lynx -dump "http://weatheroffice.ec.gc.ca/forecast/city_e.html?$1" >"$tmpfile"

# Scan the tmp file to extract the temperature and (BONUS) the city name.
# Remove the tmp file when done.
# Display the output.
#
temp=$( grep 'Temp.:' "$tmpfile" | awk '{print $2}' )
city=$( grep ': Issued' "$tmpfile" | cut -d ':' -f 1 )

rm "$tmpfile"

echo "The temperature in $1 ($city) is $temp right now."

# The script exits with the exit code of the last command executed.