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#!/bin/sh
# -*- tcl -*-
# The next line is executed by /bin/sh, but not tcl \
exec tclsh "$0" ${1+"$@"}

package require Expect

# weather - Expect script to get the weather (courtesy University of Michigan)
# Don Libes
# Version 1.10

# local weather is retrieved if no argument
# argument is the National Weather Service designation for an area
# I.e., WBC = Washington DC (oh yeah, that's obvious)

# Notes from Larry Virden <lvirden@yahoo.com> about the new host,
# rainmaker.wunderground.com: "[the] new site requires the
# machine doing the request be located in reverse dns lookup
# or it refuses to provide data."  This appears to be a blind error
# condition on the part of rainmaker.

exp_version -exit 5.0

if {$argc>0} {set code $argv} else {set code "WBC"}

proc timedout {} {
	send_user "Weather server timed out.  Try again later when weather server is not so busy.\n"
	exit 1
}

set timeout 60

set env(TERM) vt100	;# actual value doesn't matter, just has to be set

if {[file executable /usr/bin/telnet] == 0} {
	send_user "It seems that telnet is not installed. Please install telnet in order to use this script.\n"
	exit 1
}

spawn telnet rainmaker.wunderground.com 3000
while {1} {
	expect timeout {
		send_user "failed to contact weather server\n"
		exit
	} "Press Return to continue*" {
               # this prompt used sometimes, eg, upon opening connection
               send "\r"
	} "Press Return for menu*" {
               # this prompt used sometimes, eg, upon opening connection
               send "\r"
	} "M to display main menu*" {
		# sometimes ask this if there is a weather watch in effect
		send "M\r"
	} "Change scrolling to screen*Selection:" {
		break
	} eof {
		send_user "failed to telnet to weather server\n"
		exit
	}
}
send "C\r"
expect timeout timedout "Selection:"
send "4\r"
expect timeout timedout "Selection:"
send "1\r"
expect timeout timedout "Selection:"
send "1\r"
expect timeout timedout "city code:"
send "$code\r"
expect $code		;# discard this

while {1} {
	expect timeout {
		timedout
	} "Press Return to continue*:*" {
		send "\r"
	} "Press Return to display statement, M for menu:*" {
		send "\r"
	} -re "(.*)CITY FORECAST MENU.*Selection:" {
		break
	}
}

send "X\r"
expect