#!/bin/sh -u
# This CGI script displays the temperature for a given city code
# ------------------------------------------------------------------
# Syntax:  $0 [city_code]
# ------------------------------------------------------------------
# Purpose: Fetch the weather in a CGI script.
#   Optional argument is the Environment Canada city code.
#   A missing argument means we use code on-118 (Ottawa).
#   If we can't find any weather for that code, we issue a message.
#   Since this is a CGI script, I assume only one argument and I
#   don't set any particular exit code.  (Should fix that.)
# ------------------------------------------------------------------
# <NET2003 assignment label goes here>
# Comment: the required comments are missing from this sample solution
# ------------------------------------------------------------------

exec 2>&1

PATH=/bin:/usr/bin ; export PATH
umask 022
LC_COLLATE=C ; export LC_COLLATE

# BONUS part - uncomment the two IF statement lines (and fix indentation):
#
# if ! tty -s ; then
echo "Content-Type: text/plain"
echo ""
# fi

if [ $# -eq 0 ] ; then
    city=on-118
    # echo "DEBUG: Using default city code $city"
else
    city="$1"
    # echo "DEBUG: Using argument city code $city"
fi

URL="http://text.weatheroffice.ec.gc.ca/forecast/city_e.html?$city"
output=$( lynx -dump "$URL" | grep -A 1 Temperature: | tr ' \n' ' ' )

if [ "$output" = "" ] ; then
    echo "$0: Could not find temperature for city code '$city'"
else
    echo "$0: The current temperature in $city is:"
    echo "$output"
fi