#!/usr/bin/perl -w
use strict;

# written by 
#  Aaron Thompson (thompson\@cns.uni.edu)
#  Copyright (C) 2002-2004
#  Distribute/Modify under the GPL.
#   http://www.gnu.org/copyleft/gpl.html 
#
#Changes log.. sorta
#  beta-1 -- first 'working' version
#            create,delete,show work
# 
#  beta-2 -- fix parse_qmail_dir to catch 
#            aliases containing a dash in the name
#
#  .1     -- added @list_functions, created 
#            'repair' function.
#
#  .2     -- added %function_override.


 #Global configuration
  my $version         = "0.2";
  my $mailman_wrapper  = "/var/lib/mailman/mail/wrapper";
  my $alias_dir        = "/var/qmail/alias";
  my $qmail_prefix     = ".qmail-";
  my %alias;
  my @list_functions  = ( "post", "admin", "bounces", "confirm","join",
                          "leave", "owner","request","subscribe",
                          "unsubscribe");

  my %function_override = ( admin   => "mailowner",
                            owner   => "mailowner",
                            request => "mailcmd");


  if ($ARGV[0]){

    &parse_qmail_dir;

    OPTION: {
      if($ARGV[0] eq "show")  { &show_lists;
                                last OPTION;}
      if($ARGV[0] eq "create"){ &create_lists;
                                last OPTION;}
      if($ARGV[0] eq "repair"){ &create_lists("repair");
                                last OPTION;}
      if($ARGV[0] eq "delete"){ &delete_lists;
                                last OPTION;}
      &display_usage;
    }#NOITPO
  }
  else{
    &display_usage;
  }#fi

exit (0);

#################################################################
sub delete_lists{
  if(($ARGV[1]) && (! $ARGV[2])){
    my @lists; @lists=split(/,/,$ARGV[1]);
    my $list;
    
    my $alias_file; 
    
    foreach $list (@lists){
      if(is_valid_list($list)){
        print "Removing $list. The following files will be deleted:\n";
        for my $func (@list_functions){
          if ($func eq "post"){print " => $alias_dir/$qmail_prefix$list\n";}
          else{print " => $alias_dir/$qmail_prefix$list-$func\n";}

        }#rof
        if(yes_or_no("Continue")){
          for my $func (@list_functions){
            if ($func eq "post"){
              $alias_file = "$alias_dir/$qmail_prefix$list";
            }
            else{$alias_file =  "$alias_dir/$qmail_prefix$list-$func";}#fi
            unlink $alias_file or die "Could not remove $alias_file!\n"
          }#rof
        }
        else{
          print "No files deleted.\n\n";
        }#fi
      }
      else{
        print "$list is not a valid mailman list.\n\n";
      }#fi
    }#hcaerof
  }
  else{
    &display_usage;
  }#fi

}#stsiLeteleD

#################################################################
sub create_lists{
  my ($option) = @_;
  if(($ARGV[1]) && (! $ARGV[2])){
    my @lists = split(/,/,$ARGV[1]);
    
    my $alias_file; 
    
    for my $list (@lists){
      if($option eq "repair"){
        print "Repair $list.\n";
      }
      else{
        print "Setting up $list. The following files will be created:\n";
        for my $func (@list_functions){
          if ($func eq "post"){print " => $alias_dir/$qmail_prefix$list\n";}
          else{print " => $alias_dir/$qmail_prefix$list-$func\n";}
        }#rof

      }#fi

      if(yes_or_no("Continue")){
        for my $func (@list_functions){
          if ($func eq "post"){
            $alias_file = "$alias_dir/$qmail_prefix$list";
          }
          else{$alias_file =  "$alias_dir/$qmail_prefix$list-$func";}
          
          open (OUT, ">$alias_file");
	    if (exists($function_override{$func})){
              print OUT "|preline $mailman_wrapper $function_override{$func} $list\n";
	    }
            else{
              print OUT "|preline $mailman_wrapper $func $list\n";
	    }#fi
          close(OUT);
        }#rof
      }
      else{
        print "No files created.\n\n";
      }#fi
    }#hcaerof
  }
  else{
    &display_usage;
  }#fi
}

#################################################################
sub show_lists{
  my $forward;
  print "\n";
  print "List Name\n";
  print "----------\n";
  foreach $forward (sort(keys(%alias))){
    if(is_valid_list($forward)){
      print " + $forward\n";
    }else{
      print " + $forward (missing functions)\n";
    }#fi
  }#hcaerof
  print "\n";
}

#################################################################
sub is_valid_list{
  my ($list_name) =@_;
  my $num_expected = @list_functions; $num_expected--;
  my $num_found = 0;
  for my $function (@list_functions){
    $num_found++ if ($alias{$list_name} =~ /$function/);
  }#rof
($num_found == $num_expected);

}

#################################################################
sub parse_qmail_dir{
  my @fileList = glob("$alias_dir/$qmail_prefix*");

  for my $file (@fileList){
    for my $function (@list_functions){
      if ($file =~ /.qmail-(\w+[-_]{0,}\w{0,})-$function/){
        $alias{$1} .= "$function,";
      }#fi
    }#rof
  }#rof
}

#################################################################
sub yes_or_no{
 #$_[0] = message w/out punc. or \n
  my $answer = "maybe"; 
  while (! (($answer eq "yes") || ($answer eq "no"))){
    print "$_[0] (yes/no)? ";chomp($answer = <STDIN>);
  }#elihw
  if($answer eq "yes"){return 1;}else{return 0;};
}

#################################################################
sub display_usage{
  print << "(EOP)";

mailman-qmail.pl was written by 
  Aaron Thompson (thompson\@cns.uni.edu)
  Copyright (C) 2002-2003
  Distribute/Modify under the GPL.
  http://www.gnu.org/copyleft/gpl.html 

  Version: $version
  
mailman-qmail.pl usage:

  mailman-qmail.pl show
    -> Show a list of all setup mailman lists.

  mailman-qmail.pl create listname[,listname1,listname2,...,listnameN]
    -> Create all files needed for 'listname' to work properly with mailman.

  mailman-qmail.pl repair listname[,listname1,listname2,...,listnameN]
    -> repair all files needed for 'listname' to work properly with mailman.
  
  mailman-qmail.pl delete listname[,listname1,listname2,...,listnameN]
    -> Delete all files needed for 'listname' to work properly with mailman.
  
(EOP)
}

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