#!/usr/bin/perl

# Drakwizard

# Copyright (C) 2002 Arnaud Desmons <adesmons@mandrakesoft.com>
# Copyright (C) 2003 Florent Villard <warly@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::Samba;
use strict;

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

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

my $o = { 
    name => 'Samba wizard',
	var => { 
	    wiz_box_list => '', 
	    wiz_hosts_allow => '', 
	    wiz_do_file_sharing => '',
	    wiz_all_printers => '',
	    wiz_level => '',
	    wiz_printers => '',
	    wiz_do_printer_sharing => '',
	    wiz_do_homes => '',
	    wiz_workgroup => '',
	    wiz_dir => '',
	    wiz_banner => '',
	    wiz_write_list => '',
	    wiz_read_list => '',
	    wiz_hosts_deny => '',
	    list_printers => ''
	},
	needed_rpm => [ 'samba-server' ],
	defaultimage => "$ENV{__WIZ_HOME__}samba_wizard/images/samba.png"
    };

my $old = read_conf("/etc/samba/smb.conf");

my %level = (
    1 => N('All - No access restriction'),
    2 => N('My rules - Ask me allowed and denied hosts')
);

$o->{pages} = { 
    welcome => {
        name => N('Samba Configuration Wizard') . "\n\n" . N('Samba allows your server to behave as a file and print server for workstations running non-Linux systems.') . "\n\n" . N('This wizard will help you configuring the Samba services of your server.'),
        no_back => 1,
        next => 'ask_workgroup'
    },
    ask_workgroup => {
        name => N('Workgroup') . "\n\n" . N('Samba needs to know the Windows Workgroup it will serve.') . "\n\n" . N('Samba needs to know the Windows Workgroup it will serve.'),
        pre => sub {
           $o->{var}{wiz_workgroup} ||= get_workgroup()
        },
        data => [
           { label => N('Workgroup:'),  val => \$o->{var}{wiz_workgroup} },
        ],
	post => \&check_workgroup,
        next => 'ask_banner'
   },
   error_in_workgroup => {
       name => N('Error.'),
       data => [
	      { label => N('The Workgroup is wrong') },
       ],
       post => \&check_workgroup,
       next => 'ask_workgroup'
    },
    ask_banner => {
        name => N('Server Banner.') . "\n\n" . N('The banner is the way this server will be described in the Windows workstations.') . "\n\n" . N('The banner is the way this server will be described in the Windows workstations.'),
        pre => sub {
  	    $o->{var}{wiz_banner} ||= get_banner()
	},
	post => \&check_banner,
        data => [
            { label => N('Banner:'),  val => \$o->{var}{wiz_banner} },
            ],
        next => 'ask_net'
    },
    error_in_banner => {
        name => N('Error.'),
        data => [
            { label => N('The Server Banner is incorrect') },
            ],
        next => 'ask_banner'
    },
    ask_net => {
        name => N('Access control') . "\n\n" . N('') . "\n\n" . N(''),
        pre => sub {
      	$o->{var}{wiz_level} ||= 1
        },
        post => sub { return 'ask_netmask' if $o->{var}{wiz_level} == 2 },
        data => [
            { label => N('Access level :'), val => \$o->{var}{wiz_level}, list => [ keys %level ], format => sub { $level{$_[0]} } },
            ],
        next => 'ask_services'
    },
    ask_netmask => {
        name => N('Access control') . "\n\n" . N('* Example 1: allow all IPs in 150.203.*.*; except one\nhosts allow = 150.203. EXCEPT 150.203.6.66') . "\n\n" . N('* Example 2: allow hosts that match the given network/netmask\nhosts allow = 150.203.15.0/255.255.255.0') . "\n\n" . N('* Example 3: allow a couple of hosts\nhosts allow = lapland, arvidsjaur') . "\n\n" . N('* Example 4: allow only hosts in NIS netgroup \qfoonet\q,  but deny access from one particular host\nhosts allow = @foonet\nhosts deny = pirate') . "\n\n" . N('Note that access still requires suitable user-level passwords.'),
        pre => sub {
      	$o->{var}{wiz_hosts_allow} ||= get_allow_host();
      	$o->{var}{wiz_hosts_allow} ||= get_deny_host()
        },
        post => \&check,
        data => [
            { label => N('Allow hosts:'),  val => \$o->{var}{wiz_allow_host} },
            { label => N('Deny hosts:'),  val => \$o->{var}{wiz_deny_host} },
            ],
        next => 'ask_services'
    },
    ask_services => {
        name => N('Enabled Samba Services') . "\n\n" . N('Samba can provide a common file sharing area to your Windows workstation, and can also provide printer sharing for the printers connected to your server.'),
        pre => sub {
      	$o->{var}{wiz_do_file_sharing} ||= get_file_sharing();
      	$o->{var}{wiz_do_printer_sharing} ||= 1;
      	$o->{var}{wiz_do_homes} ||= get_home_sharing()
        },
        post => \&check_services,
        data => [
            { text => N('Enable file sharing area'), type => 'bool', val => \$o->{var}{wiz_do_file_sharing} },
            { text => N('Enable Server Printer Sharing'), type => 'bool', val => \$o->{var}{wiz_do_printer_sharing} },
            { text => N('Make home directories available for their owners'), type => 'bool', val => \$o->{var}{wiz_do_homes} },
            ],
        next => 'ask_dir'
    },
    warn_smbpasswd => {
        name => N('Warning.') . "\n\n" . N('You have selected to allow user access their home directories via samba but you/they must use smbpasswd to set a password.'),
        post => \&ask_dir,
        next => 'summary'
    },
    ask_dir => {
        name => N('Shared directory:') . "\n\n" . N('Type the path of the directory you want being shared.'),
        pre => sub {
      	    $o->{var}{wiz_dir} ||= get_dir()
        },
        post => \&check_dir,
        data => [
            { label => N('Shared directory:'),  val => \$o->{var}{wiz_dir} },
            ],
        next => 'ask_access'
    },
    error_in_dir => {
        name => N('Error.'),
        data => [
            { label => N('The path you entered does not exist.') },
            ],
        next => 'ask_dir'
    },
    ask_access => {
        name => N('File permissions') . "\n\n" . N('Type users or group separated by a comma (groups must be preceded by a \'@\') like this :\nroot, fred, @users, @wheel for each kind of permission.') . "\n\n" . N(''),
        pre => sub {
      	$o->{var}{wiz_read_list} ||= get_read();
      	$o->{var}{wiz_write_list} ||= get_write()
        },
        post => \&check_users,
        data => [
            { label => N('read list:'), help => N('root, fred, @users, @wheel'), val => \$o->{var}{wiz_read_list} },
            { label => N('write list:'), help => N('root, fred, @users, @wheel'), val => \$o->{var}{wiz_write_list} },
            ],
        next => 'ask_printers'
    },
    ask_printers => {
        name => N('Select which printers you want to be accessible from known users'),
        pre => sub {
      	    $o->{var}{list_printers} ||=  [ list_printers() ];
	    $o->{var}{wiz_box_list} ||= []
        },
        post => \&check,
        data => [
            { text => N('Enable all printers'), type => 'bool', val => \$o->{var}{wiz_all_printers} },
            { val => \$o->{var}{wiz_box_list}, boolean_list => \$o->{var}{list_printers}, disabled => sub { $o->{var}{wiz_all_printers} and return 1; 0 } },
            ],
        next => 'summary'
    },
    warning => {
      name => N('Warning.'),
      data => [ { label => N('') } ],
      next => 'summary'
    },
    error => {
      name => N('Error.'),
      data => [ { label => N('') } ],
      next => 'config'
    },
    summary => {
      name =>  N('Configuring Samba') . "\n\n" . N('The wizard collected the following parameters
configure Samba.') . "\n\n" . N('To accept these values, and configure your server, click the Next button or use the Back button to correct them.'),
      pre => sub {
          $o->{var}{printers} = get_printers();
	  $o->{var}{file_sharing} = $o->{var}{wiz_do_file_sharing} ? N("enabled") : N("disabled");
	  $o->{var}{printer_sharing} = $o->{var}{wiz_do_printer_sharing} ? N("enabled") : N("disabled");
	  $o->{var}{shared_homes} = $o->{var}{wiz_do_homes} ? N("enabled") : N("disabled")
      },	    
      data => [
            { label => N('Workgroup:'), fixed_val => \$o->{var}{wiz_workgroup} },
            { label => N('Server Banner:'), fixed_val => \$o->{var}{wiz_banner} },
            { label => N('File Sharing:'),  fixed_val => \$o->{var}{file_sharing} },
            { label => N('Shared directory:'),  fixed_val => \$o->{var}{wiz_dir} },
            { label => N('Print Server:'),  fixed_val => \$o->{var}{printer_sharing} },
            { label => N('Home:'), fixed_val => \$o->{var}{shared_homes} },
            { label => N('Printers:'), fixed_val => \$o->{var}{printers} },
        ],
      post => \&do_it,
      next => 'end'
    },
    end => { 
      name => N('Congratulation'),
      data => [ { label => N('The wizard successfully configured your Samba server.') } ], 
      end => 1,
      next => 0
    },
};

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

sub check {
    $> and return 1;
    $wiz->{net}->is_dhcp() and return 2;
    0;
}

sub check_services {
    $o->{var}{wiz_do_homes} and return 'warn_smbpasswd';
    $o->{var}{wiz_do_file_sharing} and return 'ask_dir';
    $o->{var}{wiz_do_printer_sharing} and return 'ask_printers';
}

sub check_dir {
    -d ($o->{var}{wiz_dir}) or return 'error_in_dir'
}

# the "__" before comment is to avoid conflicts with possible "comment" variable
# for variables value is in value key and comment idem (no risque of conflict)

sub read_conf {
    my	$self = {};
    my	($file) = @_;
    my	$menu;
    my	@tab;
    my	%conf;

    open(FH, $file) or die "$! ($file)";
    while (<FH>) {
	if (/^(\s*\;?\s*)\[(.*)\].*/) {
	    $menu = $2;
	    $conf{$menu}{__comment} = $1;
	}
	elsif (/^(?!\#)(\s*\;*\s*)(.*?)\s*=\s*(.*)\s*$/) {
	    $conf{$menu}{$2}{value} = $3;
	    $conf{$menu}{$2}{comment} = $1;
	}
	push @tab, $_;
    }
    $self->{conf} = \%conf;
    $self->{tab} = \@tab;
    bless $self;
}

# we parse @tab to check for values in the struct.

sub write_conf {
    my	$self = shift;
    my	($file) = @_;
    my	$menu;

    open(FH, "> $file") or die "$!";
    foreach (@{$self->{tab}}) {
	if (/^\s*\;?\s*\[(.*)\].*/) {
	    $menu = $1;
	    print FH "$self->{conf}->{$menu}{__comment}"."[$menu]\n";
	}
	elsif (/^(?!\#)\s*\;*\s*(.*?)\s*=/) {
	    print FH "$self->{conf}->{$menu}{$1}{comment}"."$1" ." = ". "$self->{conf}->{$menu}{$1}{value}\n";
	}
	else {
	    print FH $_;
	}
    }
}

#section has the name of the printer
sub add_printer {
    my	$self = shift;
    my	($printer) = @_;

    if (exists $self->{conf}->{$printer}) {
	$self->comment_menu($printer, " ");
    }
    else {
	$self->{conf}->{$printer}{printable}{comment} = " ";
	$self->{conf}->{$printer}{printer}{comment} = " ";
	push @{$self->{tab}}, "[$printer]\n";
	push @{$self->{tab}}, "printer = $printer\n"; 
	push @{$self->{tab}}, "printable = yes\n"; 
	$self->{conf}->{$printer}{printer}{value} = $printer;
	$self->{conf}->{$printer}{printable}{value} = "yes";
    }
}

sub list_printers {
    my @list if 0;

    return @list if @list;
    @list = sort grep /^(?!\#).*/, map {
        my ($printer) = split(':', $_);
    } cat_("/etc/printcap");
    @list
}


sub check_users {
    return 'ask_printers' if $o->{var}{wiz_do_printer_sharing}
}

sub comment_menu {
    my	$self = shift;
    my	($menu, $str) = @_;

    return if (!$menu or !exists $self->{conf}->{$menu});
    $self->{conf}->{$menu}{__comment} = $str;
    foreach (keys %{$self->{conf}->{$menu}}) {
	($_ eq "__comment") and next;
	$self->{conf}->{$menu}{$_}{comment} = $str;
    }
}

sub comment_var {
    my	$self = shift;
    my	($menu, $var, $str) = @_;

    $self->{conf}->{$menu}{$var}{comment} = $str;
}

sub chg_var {
    my	$self = shift;
    my	($menu, $var, $str) = @_;

    $self->{conf}->{$menu}{$var}{value} = $str;
}

# all or selected printers
sub printer_sharing {
    my	$self = shift;

    if ($o->{var}{wiz_all_printers}) {
	$self->comment_menu("printers", " ");
	foreach my $printer (keys (%::bool)) {
	    $self->comment_menu($printer, ";");
	}
    }
    else {
	$self->comment_menu("printers", ";");
	foreach my $printer (keys (%::bool)) {
	    if (int($::bool{$printer})) {
		$self->comment_menu($printer, " ");
		$self->add_printer($printer);
	    }
	    else {
		$self->comment_menu($printer, ";");
	    }
	}
    }
}

sub get_printers {
    if ($o->{var}{wiz_do_printer_sharing}) {
	my $string;
	$o->{var}{wiz_all_printers} and return "all printers";
	for (my $i; $i < @{$o->{var}{wiz_box_list}}; $i++) {
	    $string .= "$o->{var}{list_printers}[$i]\n" if $o->{var}{wiz_box_list}[$i]
	}
	"$string";
    }
    else {
	"disabled";
    }
}

sub check_workgroup {
    $o->{var}{wiz_workgroup} or return 'error_in_workgroup'
}

sub ask_acces {
    10;
}

sub get_write {
    $old->{conf}->{public}{"write list"}{value};
}

sub get_read {
    $old->{conf}->{public}{"read list"}{value};
}

sub check_banner {
    $o->{var}{wiz_banner} or return 'error_in_banner'
}

sub get_workgroup {
    $old->{conf}->{global}{workgroup}{value}
}

sub get_banner {
    $old->{conf}->{global}{"server string"}{value};
}

sub ask_dir {
    return 'ask_dir' if $o->{var}{wiz_do_file_sharing};
    return 'ask_printers' if $o->{var}{wiz_do_printer_sharing};
}

sub get_dir {
    $old->{conf}->{public}{path}{value};
}

sub get_file_sharing {
    return 0 if ($old->{conf}->{public}{__comment} =~ /\;|\#/);
    1;
}

sub get_home_sharing {
    return 0 if ($old->{conf}->{homes}{__comment} =~ /\;|\#/);
    1;
}

sub get_netmask {
    "192.168.100.1/255.255.255.0";
}

sub get_allow_host {
    $old->{conf}->{global}{"hosts allow"}{value};
}

sub get_deny_host {
    $old->{conf}->{global}{"hosts deny"}{value};
}

# remember one variable cannot be commented and not in the same file.
sub do_it {
    $::testing and return;
    my	$file = "__WIZ_HOME__/samba_wizard/scripts/smb.conf.default";

    my $conf = read_conf($file);
    $conf->chg_var("global", "workgroup", $o->{var}{wiz_workgroup});
    $conf->chg_var("global", "server string", $o->{var}{wiz_banner});
    $conf->chg_var("public", "write list", $o->{var}{wiz_write_list}) if $o->{var}{wiz_do_file_sharing};
    $conf->chg_var("public", "read list", $o->{var}{wiz_read_list}) if $o->{var}{wiz_do_file_sharing};
    my $ip = $o->itf_get("IPADDR");
    if ($o->{var}{wiz_do_file_sharing}) {
	standalone->explanations("Enabling $o->{var}{wiz_dir} samba file sharing");
 	$conf->comment_menu("public", " ");
	$conf->chg_var("public", "path", $o->{var}{wiz_dir});
    }
    else {
	standalone->explanations("Disabling samba file sharing");
	$conf->comment_menu("public", ";");
    }
    if ($o->{var}{wiz_do_homes}) {
	standalone->explanations("Enabling samba homes sharing");
	$conf->comment_menu("homes", " ");
    }
    else {
	standalone->explanations("Disabling samba homes sharing");
	$conf->comment_menu("homes", ";");
    }
    standalone->explanations("Samba deny $o->{var}{wiz_hosts_deny}");
    standalone->explanations("Samba allow $o->{var}{wiz_hosts_allow}");
#    $conf->chg_var("global", "hosts deny", $o->{var}{wiz_hosts_deny});
#    $conf->chg_var("global", "hosts allow", $o->{var}{wiz_hosts_allow});

    if ($o->{var}{wiz_do_printer_sharing}) {
	standalone->explanations("Enabling printer sharing");
	$conf->printer_sharing();
    }
    else {
 	standalone->explanations("Disabling printer sharing");
 	foreach my $printer (keys (%::bool)) {
	    if (!int($::bool{$printer})) {
		$conf->comment_menu("$printer", ";");
 	    }
 	}
	$conf->comment_menu("printers", ";");
     }
    $conf->write_conf("/etc/samba/smb.conf");
    if (services::is_service_running('smb')) {
	services::restart('smb') 
    } else {
        services::start('smb')
    }
}
1;