#!/usr/bin/perl
#
#  @(#)newsfrom.faces 1.2 91/11/19
#
#  Copyright (c) Steve Kinzler - May 1991.
#
#  Permission is given to distribute these sources, as long as the
#  copyright messages are not removed, and no monies are exchanged.
#
#  No responsibility is taken for any errors on inaccuracies inherent
#  either to the comments or the code of this program, but if reported
#  to me, then an attempt will be made to fix them.

@newsgroups = ('cs.system');
$cols = 12;

$newsrc = "$ENV{'HOME'}/.newsrc";
$spool = '/usr/spool/news';

# newsfrom.faces - monitor unread news articles in selected newsgroups
# Steve Kinzler, kinzler@cs.indiana.edu, 3 May 1991

$format = "%s\t%s\t%s\t%s\t%s\t%s\n";

open(NEWSRC, $newsrc);
while (<NEWSRC>) {
	chop;
	next unless /^(.*):\s*(.*)$/;
	$groups{$1} = $2;
}
close NEWSRC;

for $group (@newsgroups) {
	$dir = $group;
	$dir =~ s/\./\//g;
	next unless chdir("$spool/$dir");

	@arts = <[0-9]*>;
	@read = ();

	for (split(/,/, $groups{$group})) {
		next unless /^(\d+)-?(\d*)$/;
		($b, $t) = ($1, $2);
		$t = $b unless $t;
		push(@read, grep($_ >= $b && $_ <= $t, @arts));
	}

	grep($mark{$_}++, @read);
	@unread = grep(! $mark{$_}, @arts);

	for $art (@unread) {
		$from = '';
		$host = '';
		$subj = '';

		open(ART, $art);
		while (<ART>) {
			chop;
			last if /^$/;
			if (s/^From:\s*//i) {
				$from = $_;
			} elsif (s/^Subject:\s*//i) {
				s/\s+/ /g;
				s/Re: />/g;
				$subj = $_;
			}
		}
		close ART;

		next unless $from;

		$from =~ s/.*<([^>]*)>.*/\1/;
		$from =~ s/\(.*\)//;
		$from =~ s/\s.*//;

		while ($from =~ /^@([^:]*):([^:].*)/) {
			$from = $2; $host = $1;
		}
		while ($from =~ /(.*)[%@](.*)/) {
			$from = $1; $host = $2;
		}
		while ($from =~ /([^!]*)!(.*)/) {
			$from = $2; $host = $1;
			$host .= '.uucp' unless $host =~ /\./;
		}
		while ($from =~ /([^:]*)::(.*)/) {
			$from = $2; $host = $1;
		}

		$from =~ y/A-Z/a-z/ unless $from =~ /[a-z]/;
		$from =~ s/^postmaster$/postmaster/i;
		$host =~ y/A-Z/a-z/;

		$n++;
		$list .= sprintf($format, $from, $host, $from, '', $subj, '');
	}
}

if (! $n) {
	print "Cols=1 Rows=1\n";
	printf $format, 'nonews', '', 'No news', '', $newsgroups[0], '';
} else {
	printf $format, $from, $host, $from, $n, '', '';
	printf "Cols=%d Rows=%d\n",
		($n > $cols) ? $cols : $n, ($n - 1) / $cols + 1;
	print $list;
}