#!../expect -f

# weather - Expect script to get the weather (courtesy University of Michigan)
# Don Libes
# Version 1.9

# 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)

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
}

# delete special weather statement question
proc delete_special {s} {
	set x [string first "     ******" $s]
	return [join [lrange [split $s ""] 0 $x] ""]
}

set timeout 60
log_user 0

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

spawn telnet downwind.sprl.umich.edu 3000
match_max 100000
for {} 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

for {} 1 {} {
	expect timeout {
		timedout
	} "Press Return to continue*:*" {
		send_user "\n[delete_special $expect_out(buffer)]\n"
		send "\r"
	} "Press Return to display statement, M for menu:*" {
		send_user "\n[delete_special $expect_out(buffer)]\n"
		send "\r"
	} -re "(.*)CITY FORECAST MENU.*Selection:" {
		send_user "\n$expect_out(1,string)\n"
		break
	}
}

send "X\r"
expect