#!/usr/bin/perl
# Copyright (C) 1999,2003 Ian Jackson
#
# This is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with userv-utils; if not, write to the Free Software
# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# $Id$

$minreaddays= 21;
$maxperuser= 250;
$fetchdir= "/var/lib/news/fetch";
chdir("/etc/news") || die $!;

open(CONF,"nntp-merge.conf") || die $!;
while(<CONF>) {
    next if m/^\#/ || !m/^\S/;
    next if m/^(myfqdn|xref|server|server-nosearch|fetch|read|post|permit|believe|minreaddays)\s/;
    if (m/^maxperuser\s+(\d+)\s+$/) {
        $maxperuser= $1;
    } elsif (m/^extrarc\s+(\S+)\s+$/) {
        push(@extrarc,$1);
    } else {
        die "$_ ?";
    }
}

open IGN,"</etc/news/newsrc-ignoredusers" or die $!;
while (<IGN>) {
    chomp;
    next if m/^\#/;
    s/\s*$//;
    $ign{$_}= 1;
}
close IGN or die $!;

open PASS,"</etc/userlist" or die $!;
while (<PASS>) {
    chomp;
    next if m/^\#/;
    $user= $_;
    next if $ign{$user};
    open GL,"userv -t 30 $user newsrc-listgroups |" or die $!;
    scan("user $user",1);
    close GL; $? and warn "getgroups: error getting groups for $user (code $?)";
}
close PASS or die $!;

for $f (@extrarc) {
    open GL,"< $f" or die $!;
    scan("file $f",0);
    close GL or die $!;
}

chdir($fetchdir) || die $!;
open(NG,">all-read-groups.new") || die $!;
print(NG join("\n",sort keys %yes)."\n") || die $!;
close(NG) || die $!;
rename("all-read-groups.new","all-read-groups") || die $!;

printf "total %d groups\n",scalar(keys %yes);
exit(0);

sub scan ($) {
    my ($where,$toomanyenf) = @_;
    @g= ();
    while (<GL>) {
	die "bad group in $where" unless m/^[-a-z0-9+]+\.[-a-z0-9+._]+$/i;
	push @g, $&;
    }
    warn("too many from $where"), return if $toomanyenf && @g > $maxperuser;
    map { $yes{$_}=1; } @g;
    printf "%-20s - %4d groups\n",$where,scalar(@g);
}