#!/usr/bin/perl

# Drakwizard

# Copyright (C) 2003 Mandrakesoft
#
# Author: Florent Villard <warly@mandrakesoft.com>
#         aginies <aginies _ateuh_ mandrakesoft.com>
#
# This program 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, 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

package MDK::Wizard::Proftpd;
use strict;

use common;
use services;
use MDK::Wizard::Wizcommon;

my $wiz = MDK::Wizard::Wizcommon->new;

my $file = "/etc/proftpd.conf";

my ($servername) = cat_($file) =~ /ServerName\s+(\S*.*)/;
my ($ftp_port) = cat_($file) =~ /Port\s+(\d+)/;

my $o = {
	 name => N("FTP wizard"),
	 var => {
		 wiz_ftp_external => '0',
		 wiz_ftp_internal => '1',
		 wiz_root_login => '',
		 wiz_server_admin => '',
		 wiz_default_root => '',
		 wiz_ftp_resume => '',
		 wiz_ftp_fxp => '',
		 wiz_server_name => '',
		 wiz_port => '',
		},
	 needed_rpm => [ 'proftpd' ],
	 defaultimage => "$ENV{__WIZ_HOME__}ftp_wizard/images/FTP.png"
	};

my %opt = (
	   "SystemLog" => "/var/log/proftpd/proftpd.log",
	   "TransferLog" => "/var/log/proftpd/xferlog",
	   "Extendedlog" => "/var/log/proftpd/ftp.log",
	   "LogFormat default" => qq("%h %l %u %t "%r" %s %b"),
	   "LogFormat auth" => qq("%v [%P] %h %t "%r" %s"),
	   "LogFormat write" => qq("%h %l %u %t "%r" %s %b"),
	   "ServerIdent" => "off",
	   "DeferWelcome" => "on",
	   "DisplayConnect" => "/etc/banner-proftpd",
	   "AccessDenyMsg" => qq(" !-!! ACCESS DENY !!-! SEEMS YOU HAVE NO RIGHT THERE !!"),
	   "AccessGrantMsg" => qq(" -- Guest access granted for %u --"),
	   "IdentLookups" => "off",
	   "UseReverseDNS" => "off",
	   "TimesGMT" => "off",
	   "DirFakeUser" => "off nobody",
	   "DirFakeGroup" => "off nobody",
	   "DeleteAbortedStores" => "off",
	   "PersistentPasswd" => "off",
	 );

$o->{pages} = { 
	       welcome => {
			   name => N("FTP server configuration wizard") . "\n\n" . N("This wizard will help you configuring an FTP server for your network."),
			   no_back => 1,
			   post => \&check,
			   next => 'config'
			  },
	       config => {
			  name => N("FTP server") . "\n\n" . N("Your server can act as an FTP server toward your internal network (intranet) and as an FTP server for the Internet.") . "\n\n" . N("Select the kind of FTP service you want to activate:"),
			  data => [
				   { label => N("Enable the FTP server for the intranet"), type => 'bool', val => \$o->{var}{wiz_ftp_internal} },
				   { label => N("Enable the FTP server for the Internet"), type => 'bool', val => \$o->{var}{wiz_ftp_external} },
				  ],
			  complete => sub {
			    if ($o->{var}{wiz_ftp_external} == 0 && $o->{var}{wiz_ftp_internal} == 0) {
			      $::in->ask_warn(N("Error"), N("Please choose whether to allow a connection to FTP server from internal or external hosts."));
			      return 1;
			    } else { return 0 }
			  },
			  next => 'options'
	      },
	       options => {
			   name => N("FTP Proftpd server options, step 1") . "\n\n" . N("Permit root login: allow root to log on FTP server.") . "\n" . N("Admin email: email address of the FTP administrator."),
			   pre => sub {
			     $o->{var}{wiz_root_login} ||= 0;
			     $o->{var}{wiz_server_name} = $servername;
			   },
			   data => [
				    { label => N('Server name:'), val => \$o->{var}{wiz_server_name} },
				    { label => N("Admin email:"), val => \$o->{var}{wiz_server_admin}, help => 'admin@guibland.com' },
				    { label => N("Permit root login:"), type => 'bool', val => \$o->{var}{wiz_root_login} },
				   ],
			   complete => sub {
			     if (!any { /bash/ } cat_("/etc/shells")) {
			       $::in->ask_warn(N("Error"), N("I can't find bash in list of shells! It seems you have modified it by hand! Please correct."));
			       return 1;
			     }
			     if (!$o->{var}{wiz_server_name}) { $::in->ask_warn(N("Error"), N("Need a server name")); return 1; }
			   },
			   next => 'options_step2',
			  },
	       options_step2 => {
				 name => N('FTP server options, step 2') . "\n\n" . N("Chroot home user: users will only see their home directory.") . "\n" . N("Allow FTP resume: allow resume upload or download on FTP server.") . "\n" . N("Allow FXP: allow file transfer via another FTP."),
				 pre => sub {
				   $o->{var}{wiz_default_root} ||= 1;
				   $o->{var}{wiz_ftp_resume} ||= 1;
				   $o->{var}{wiz_ftp_fxp} ||= 0;
				   $o->{var}{wiz_port} = $ftp_port;
				 },
				 data => [
					  { label => N('FTP Port:'), val => \$o->{var}{wiz_port}, help => 'Default port is 21 for an FTP server' },
					  { label => N("Chroot home user:"), type => 'bool', val => \$o->{var}{wiz_default_root} },
					  { label => N("Allow FTP resume:"), type => 'bool', val => \$o->{var}{wiz_ftp_resume} },
					  { label => N("Allow FXP:"), type => 'bool', val => \$o->{var}{wiz_ftp_fxp} },
					 ],
				 complete => sub { if ($o->{var}{wiz_port} !~ /^\d+$/) { $::in->ask_warn(N('Error'), N('FTP Port should be a number.')); return 1; } },
				 next => 'summary',
				},
	       warning_dhcp => {
				name => N("Warning.") . "\n\n" . N("You are in DHCP, server may not work with your configuration."),
				ignore => 1,
				next => 'config'
			       },
	       must_be_root => {
				name => N("Error.") . "\n\n" . N("Sorry, you must be root to do this..."),
				ignore => 1,
	        next => 'config'
			       },
	       summary => {
			   name =>  N("Configuring the FTP server") . "\n\n" . N("The wizard collected the following parameters needed to configure your FTP server") . "\n" . N("To accept those values, and configure your server, click the next button or use the back button to correct them"),
			   pre => sub {
			     $o->{var}{internal} = $o->{var}{wiz_ftp_internal} ? N("enabled") : N("disabled");
			     $o->{var}{external} = $o->{var}{wiz_ftp_external} ? N("enabled") : N("disabled");
			     $o->{var}{rootlogin} = $o->{var}{wiz_root_login} ? N("enabled") : N("disabled");
			     $o->{var}{defaultroot} = $o->{var}{wiz_default_root} ? N("enabled") : N("disabled");
			     $o->{var}{ftpresume} = $o->{var}{wiz_ftp_resume} ? N("enabled") : N("disabled");
			     $o->{var}{fxp} = $o->{var}{wiz_ftp_fxp} ? N("enabled") : N("disabled");
			   },
			   data => [
				    { label => N('FTP Port:'), fixed_val => \$o->{var}{wiz_port} },
				    { label => N("Intranet FTP server:"), fixed_val => \$o->{var}{internal} },
				    { label => N("Internet FTP server:"), fixed_val => \$o->{var}{external} },
				    { label => N("Permit root Login"), fixed_val => \$o->{var}{rootlogin} },
				    { label => N("Chroot Home user"), fixed_val => \$o->{var}{defaultroot} },
				    { label => N("Allow FTP resume"), fixed_val => \$o->{var}{ftpresume} },
				    { label => N("Allow FXP"), fixed_val => \$o->{var}{fxp} },
				   ],
			   post => \&do_it,
			   next => 'end'
			  },
	       end => { 
		       name => N("Congratulations") . "\n\n" . N("The wizard successfully configured your intranet/Internet FTP server"),
		       end => 1,
		       no_back => 1,
		       next => 0
		      },
	       error_end => {
			     name => N("Failed"),
                             data => [ { label => N("Please relaunch drakwizard, and try to change some parameters.") } ],
                             no_back => 1,
                             end => 1,
                             next => 0,
                            },
};

sub new {
    my ($class) = @_;
    bless {
	    o   => $o,
       }, $class;
}

sub true {
    my ($val) = @_;
    return member($val, qw(1 '1' "1" true 'true' "true"));
}

sub get_dir {
  die "no FTP configuration file found! warning." if !-f $file;
  local *NEW;
  open(NEW, "< $file") or die "error while opening $file: $!";
  local $_;
  while (<NEW>) { # we need 3 elements to consider section as known
    if (m/^\s*<drakwizard>/s...m!^\s*</drakwizard>!s) {
      if (m/^\s*<Anonymous\s*(.*)>/s) {
	return $1;
      }
    }
  }
  "";
}

sub check {
    $> and return 'must_be_root';
    $wiz->{net}->is_dhcp and return 'warning_dhcp';
    '';
}

sub print_anonymous {
    my ($arg) = @_;
    print '
#<drakwizard>
<Anonymous '.$arg.'>
  User	ftp
  Group	ftp
  UserAlias anonymous ftp
  MaxClients 10
  <Limit WRITE>
    DenyAll
  </Limit>
</Anonymous>
#</drakwizard>
';
}

sub change_options {
  my ($var, $var_in_conf) = @_;
  my $status;
  if ($var == 1) { $status = "on" } else { $status = "off" }
  if (any { /^$var_in_conf/ } cat_($file)) {
    substInFile { s/$var_in_conf.*/$var_in_conf $status/ } $file;
  } else {
    append_to_file($file, "$var_in_conf $status\n");
  }
}

sub add_options {
    my ($var, $value) = @_;
    if (any { /^$var/ } cat_($file)) {
    substInFile { s/$var.*/$var $value/ } $file;
  } else {
    append_to_file($file, "$var $value\n");
  }
}


sub do_it {
    $::testing and return;
    my $wiz_ftp_internal = $o->{var}{wiz_ftp_external} ? 1 : true $o->{var}{wiz_ftp_internal};
    my $wiz_ftp_external = true $o->{var}{wiz_ftp_external};
    die "no FTP configuration file found! warning." if !-f $file;
    MDK::Common::cp_af($file, $file . ".orig");
    my $allow;
    if ($wiz_ftp_internal && !$wiz_ftp_external) {
	($allow) = $wiz->{net}->itf_get("IPADDR") =~ qr/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.)\d{1,3}$/;
	$allow .= " 127.0.0.1";
    }
    elsif ($wiz_ftp_external) {
	$allow = "all";
    }

    my $conf = cat_($file) . "#EndOfFile";
    my ($bloc) = $conf =~ /.*?(#drakwizard_pxe_b.*?#drakwizard_pxe_end)\n.*#EndOfFile/s;

    if (!$bloc) {
	$bloc = "
#drakwizard_proftpd
<Global>
  <Limit LOGIN>
    Order allow,deny
    Allow from $allow
    Deny from all
  </Limit>
</Global>
#drakwizard_proftpd

";
	append_to_file($file, $bloc);
      } else {
	substInFile { s/Allow from.*/Allow from $allow/ } $file;
      }

    # options
    # wiz_root_login wiz_server_admin wiz_default_root wiz_ftp_resume wiz_ftp_fxp
    if ($o->{var}{wiz_server_admin}) {
      if (any { /^ServerAdmin/ } cat_($file)) {
	substInFile { s/ServerAdmin.*/ServerAdmin $o->{var}{wiz_server_admin}/ } $file;
      } else {
	append_to_file($file, "ServerAdmin $o->{var}{wiz_server_admin}\n");
      }
    } else { substInFile { s/ServerAdmin.*// } $file }

    change_options($o->{var}{wiz_root_login}, "RootLogin");
    if ($o->{var}{wiz_root_login} == 1) { substInFile { s/root// } "/etc/ftpusers" }
    change_options($o->{var}{wiz_ftp_fxp}, "AllowForeignAddress");
    # in ftp resume there is two options (store or retrieve)
    change_options($o->{var}{wiz_ftp_resume}, "AllowStoreRestart");
    change_options($o->{var}{wiz_ftp_resume}, "AllowRetrieveRestart");

    substInFile { s/^ServerName.*/ServerName $o->{var}{wiz_server_name}/ } $file;
    substInFile { s/^Port.*/Port $o->{var}{wiz_port}/ } $file;

    my $data;
    if ($o->{var}{wiz_default_root} == 1) {
      $data = "DefaultRoot ~";
    } else {
      $data = "";
    }
    if (any { /^DefaultRoot/ } cat_($file)) {
      substInFile { s/DefaultRoot.*/$data/ } $file;
    } else {
      append_to_file($file, "$data\n");
    }

    my $cle, my $val;
    while (($cle, $val) = each %opt) {
      add_options($cle, $val);
    }

    if (services::is_service_running('proftpd')) {
        services::restart('proftpd');
    } else {
        services::start('proftpd');
    }
    check_started('proftpd');
}

1;