package Fripost::Panel::Interface;

use 5.010_000;
use strict;
use warnings;
use utf8;

=head1 NAME

Interface.pm -

=cut

use parent 'Fripost::Panel::Login';
use Fripost::Schema;
use Fripost::Password;
use HTML::Entities;
use Net::IDN::Encode qw/email_to_unicode/;


# This method is called right before the 'setup' method below. It
# inherits the configuration from the super class.
sub cgiapp_init {
    my $self = shift;
    $self->SUPER::cgiapp_init;

    # Every single Run Mode here is protected
    $self->authen->protected_runmodes( ':all' );
}


# This is the first page seen by authenticated users. It lists the known
# domains.
sub ListDomains : StartRunmode {
    my $self = shift;
    my %CFG = $self->cfg;

    my ($ul,$ud) = split /\@/, email_to_unicode($self->authen->username), 2;

    my $fp = Fripost::Schema->SASLauth( $self->authen->username, %CFG );
    my @domains = $fp->domain->search( -concat => "\n", -die => 403);
    $fp->done;

    my $template = $self->load_tmpl( 'list-domains.html', cache => 1, utf8 => 1
                                   , loop_context_vars => 1
                                   , global_vars => 1 );
    $template->param( url => $self->query->url
                    , user_localpart => encode_entities($ul)
                    , user_domainpart => encode_entities($ud)
                    , domains => [ map { { domain => encode_entities($_->{domain})
                                         , isactive => $_->{isactive}
                                         , description => $_->{description} } }
                                       @domains ]
    );
    return $template->output;
}


# This Run Mode lists the known mailboxes, aliases and lists under the current
# domain.
sub ListLocals : Runmode {
    my $self = shift;
    my %CFG = $self->cfg;

    my ($ul,$ud) = split /\@/, email_to_unicode($self->authen->username), 2;
    my $d = decode_entities ((split /\//, $ENV{PATH_INFO}, 3)[1]);
    Encode::_utf8_on($d);
    my $fp = Fripost::Schema::->SASLauth( $self->authen->username, %CFG );

    # Query *the* matching domain
    my %domain = $fp->domain->get( $d, -die => 404 );

    # Query the mailboxes, aliases and lists under the given domain. We
    # don't die with a HTTP error code here, as it is not supposed to
    # crash.
    my @mailboxes = $fp->mailbox->search( $d );
    my @aliases   = $fp->alias->search( $d );
    my @lists     = $fp->list->search( $d, -is_pending => 0 );

    $fp->done;

    my $template = $self->load_tmpl( 'list-locals.html', cache => 1, utf8 => 1
                                   , loop_context_vars => 1
                                   , global_vars => 1 );

    $template->param( url => $self->query->url
                    , user_localpart => encode_entities($ul)
                    , user_domainpart => encode_entities($ud)
    );
    $template->param( domain => encode_entities($domain{domain})
                    , isactive => $domain{isactive}
                    , description => join ("\n", @{$domain{description}}) );
    # Can the user edit the domain (change description, toggle
    # activation, modify catchalls?)
    $template->param( canEditDomain => $domain{permissions} =~ /[op]/ );

    # Can the user add mailboxes?
    $template->param( canAddMailbox => $domain{permissions} =~ /p/ );
    # Should we list mailboxes?
    $template->param( listMailboxes => $#mailboxes >= 0 ||
                                       $domain{permissions} =~ /p/ );
    $template->param( mailboxes => [
        map { { user => encode_entities($_->{user})
              , description => join ("\n", @{$_->{description}})
              , isactive => $_->{isactive}
              , forwards => [ map { {forward => encode_entities($_)} }
                                  @{$_->{forwards}} ]
              , quota => $_->{quota}
              };
            }
            @mailboxes
    ]);

    # Can the user add aliases?
    $template->param( canAddalias => $domain{permissions} =~ /[aop]/ );
    # Should we list aliases?
    $template->param( listAliases => $#aliases >= 0 ||
                                     $domain{permissions} =~ /[aop]/ );
    $template->param( aliases => [
        map { { alias => encode_entities($_->{alias})
              , description => join ("\n", @{$_->{description}})
              , isactive => $_->{isactive}
              , destinations => [ map { {destination => encode_entities($_)} }
                                      @{$_->{maildrop}} ]
              };
            }
            @aliases
    ]);
    $template->param( catchalls => [ map { {catchall => encode_entities($_)} }
                                         @{$domain{catchalls}} ]
                    , CAodd => not $#aliases % 2);

    # Can the user add lists?
    $template->param( canAddList => $domain{permissions} =~ /[lop]/ );
    # Should we list lists?
    $template->param( listLists => $#lists >= 0 || $domain{permissions} =~ /[lop]/ );
    $template->param( lists => [
        map { { list => encode_entities($_->{list})
              , description => join ("\n", @{$_->{description}})
              , isactive => $_->{isactive}
              , transport => $_->{transport}
              };
            }
            @lists
    ]);
    return $template->output;
}


# In this Run Mode authenticated users can edit the domain description
# and catchalls, and toggle activation (if they have the permission).
sub EditDomain : Runmode {
    my $self = shift;
    my %CFG = $self->cfg;

    my ($ul,$ud) = split /\@/, email_to_unicode($self->authen->username), 2;
    my $d = decode_entities ((split /\//, $ENV{PATH_INFO}, 3)[1]);
    Encode::_utf8_on($d);

    my $q = $self->query;
    return $self->redirect($q->url .'/') if defined $q->param('cancel');

    my $fp = Fripost::Schema::->SASLauth( $self->authen->username, %CFG );

    my $error; # Tells whether the change submission has failed.
    if (defined $q->param('submit')) {
        # Changes have been submitted: process them
        $error = $fp->domain->replace({
                     domain => $d,
                     isactive => $q->param('isactive'),
                     description => $q->param('description'),
                     catchalls => $q->param('catchalls')
        }, -concat => "(\n|\x{0D}\x{0A})");
    }
    my %domain = $fp->domain->get( $d, -die => 404 );
    $fp->done;

    my $template = $self->load_tmpl( 'edit-domain.html', cache => 1, utf8 => 1
                                   , loop_context_vars => 1
                                   , global_vars => 1 );
    $template->param( url => $q->url
                    , user_localpart => encode_entities($ul)
                    , user_domainpart => encode_entities($ud)
                    , domain => encode_entities($d)
    );
    if ($error) {
        # Preserve the (incorrect) form
        $template->param( isactive => $q->param('isactive')
                        , description => $q->param('description')
                        , catchalls => $q->param('catchalls')
                        , error => encode_entities ($error, "‘‘") );
    }
    else {
        $template->param( isactive => $domain{isactive}
                        , description => join ("\x{0D}\x{0A}",
                                               @{$domain{description}})
                        , catchalls => join ("\x{0D}\x{0A}",
                                             map { encode_entities ($_) }
                                                 @{$domain{catchalls}}) );
    }
    $template->param( newChanges => defined $q->param('submit') );
    return $template->output;
}


# In this Run Mode authenticated users can edit the entry (if they have
# the permission).
sub EditLocal : Runmode {
    my $self = shift;
    my %CFG = $self->cfg;

    my ($ul,$ud) = split /\@/, email_to_unicode($self->authen->username), 2;
    my ($null,$d,$l,$crap) = split /\//, $ENV{PATH_INFO}, 4;
    my $du = decode_entities ($d); Encode::_utf8_on($du);
    my $lu = decode_entities ($l); Encode::_utf8_on($lu);

    my $q = $self->query;
    return $self->redirect($q->url.'/'.$d.'/') if defined $q->param('cancel');

    my $fp = Fripost::Schema::->SASLauth( $self->authen->username, %CFG );

    # Search for *the* matching mailbox, alias or list.
    my %local = $fp->local->get ($lu.'@'.$du, -die => 404,
                                              -concat => "\x{0D}\x{0A}" );
    die "Unknown type" unless grep { $local{type} eq $_ }
                                   qw/mailbox alias list/;

    my $error; # Tells whether the change submission has failed.
    my $t = $local{type};

    if (defined $q->param('a') and $q->param('a') eq 'delete') {
        # Delete the entry
        $error = $fp->$t->delete($lu.'@'.$du, -die => 0);
        unless ($error) {
            $fp->done;
            return $self->redirect($q->url .'/'. $d .'/');
        }
    }
    if (defined $q->param('submit')) {
        # Changes have been submitted: process them
        my %entry;
        if ($t eq 'mailbox') {
            $entry{user} = $lu.'@'.$du;
            $entry{forwards} = $q->param('forwards');

            if ($q->param('oldpw') ne '' or
                $q->param('newpw') ne '' or
                $q->param('newpw2') ne '') {
                # If the user tries to change the password, we make her
                # bind first, to prevent an attacker from setting a
                # custom password and accessing the emails.
                if ($q->param('newpw') ne $q->param('newpw2')) {
                    $error = "Passwords do not match";
                }
                elsif (length $q->param('newpw') < $CFG{password_min_length}) {
                    $error = "Password should be at least "
                            .$CFG{password_min_length}
                            ." characters long.";
                }
                else {
                    my $fp;
                    eval {
                        my $u = email_to_unicode($self->authen->username);
                        $fp = Fripost::Schema::->auth(
                                  $u,
                                  $q->param('oldpw'),
                                  ldap_uri => $CFG{ldap_uri},
                                  ldap_suffix => $CFG{ldap_suffix},
                                  -die => "Wrong password (for ‘"
                                          .encode_entities($u)."‘)." );
                    };
                    $error = $@ || $fp->mailbox->passwd(
                                      $entry{user},
                                      Fripost::Password::hash($q->param('newpw'))
                                   );
                    $fp->done if defined $fp;
                }
            }
        }
        elsif ($t eq 'alias') {
            $entry{alias} = $lu.'@'.$du;
            $entry{maildrop} = $q->param('maildrop');
        }
        elsif ($t eq 'list') {
            $entry{list} = $lu.'@'.$du;
            $entry{transport} = $q->param('transport');
        }
        $entry{isactive} = $q->param('isactive');
        $entry{description} = $q->param('description');
        $error = $fp->$t->replace( \%entry, -concat => "(\n|\x{0D}\x{0A})")
            unless $error;
    }

    my $template = $self->load_tmpl( "edit-$t.html",
                                     cache => 1, utf8 => 1 );
    $template->param( url => $q->url
                    , user_localpart => encode_entities($ul)
                    , user_domainpart => encode_entities($ud)
                    , domain => encode_entities($du)
    );
    if ($error and defined $q->param('submit')) {
        # Preserve the (incorrect) form, except the passwords
        if ($t eq 'mailbox') {
            $template->param( user => encode_entities($l)
                            , forwards => $q->param('forwards') );
        }
        elsif ($t eq 'alias') {
            $template->param( alias => encode_entities($l)
                            , maildrop => $q->param('maildrop') );
        }
        elsif ($t eq 'list') {
            $template->param( list => encode_entities($l) );
        }
        $template->param( isactive => $q->param('isactive')
                        , description => $q->param('description') );
    }
    else {
        %local = $fp->local->get ($lu.'@'.$du, -die => 404,
                                               -concat => "\x{0D}\x{0A}" );
        if ($t eq 'mailbox') {
            $template->param( user => encode_entities($local{user})
                            , forwards => encode_entities($local{forwards}) );
        }
        elsif ($t eq 'alias') {
            $template->param( alias => encode_entities($local{alias})
                            , maildrop => encode_entities($local{maildrop}) );
        }
        elsif ($t eq 'list') {
            $template->param( list => encode_entities($local{list}) );
        }
        $template->param( isactive => $local{isactive}
                        , description => $local{description} );
    }
    $fp->done;
    my $news = (defined $q->param('submit') or
                (defined $q->param('a') and $q->param('a') eq 'delete'));
    $template->param( newChanges => $news );
    $template->param( error => encode_entities ($error, "‘‘") ) if $error;
    $template->param( canDelete => 1 ); # TODO
    $q->delete('a');
    return $template->output;
}


# In this Run Mode authenticated users can add mailboxes, aliases and
# lists (if they have the permission).
sub AddLocal : Runmode {
    my $self = shift;
    my %CFG = $self->cfg;

    my ($ul,$ud) = split /\@/, email_to_unicode($self->authen->username), 2;
    my $d = (split /\//, $ENV{PATH_INFO}, 3)[1];
    my $du = decode_entities ($d); Encode::_utf8_on($du);

    my $q = $self->query;
    return $self->redirect($q->url.'/'.$d.'/') if defined $q->param('cancel');

    my $t = $q->param('t') // die "Undefined type";
    my $error; # Tells whether the change submission has failed.
    if (defined $q->param('submit')) {
        # Changes have been submitted: process them
        my %entry;
        if ($t eq 'mailbox') {
            $entry{user} = $q->param('user').'@'.$du;
            $entry{forwards} = $q->param('forwards');
            if ($q->param('password') ne $q->param('password2')) {
                $error = "Passwords do not match";
            }
            elsif (length $q->param('password') < $CFG{password_min_length}) {
                $error = "Password should be at least "
                        .$CFG{password_min_length}
                        ." characters long.";
            }
            else {
                $entry{password} = Fripost::Password::hash($q->param('password'));
            }
            # TODO: inherit the quota from the postmaster's?
        }
        elsif ($t eq 'alias') {
            $entry{alias} = $q->param('alias').'@'.$du;
            $entry{maildrop} = $q->param('maildrop');
        }
        elsif ($t eq 'list') {
            $entry{list} = $q->param('list').'@'.$du;
            $entry{transport} = $q->param('transport');
        }
        else {
            # Unknown type
            return $self->redirect($q->url.'/'.$d.'/');
        }
        $entry{isactive} = $q->param('isactive');
        $entry{description} = $q->param('description');

        unless ($error) {
            my $fp = Fripost::Schema::->SASLauth( $self->authen->username, %CFG );
            $error = $fp->$t->add( \%entry, -concat => "(\n|\x{0D}\x{0A})");
            $fp->done;
            return $self->redirect($q->url.'/'.$d.'/') unless $error;
        }
    }

    my $template = $self->load_tmpl( "add-$t.html", cache => 1, utf8 => 1 );
    $template->param( url => $q->url
                    , user_localpart => encode_entities($ul)
                    , user_domainpart => encode_entities($ud)
                    , domain => encode_entities($du)
    );
    if ($error) {
        # Preserve the (incorrect) form, except the passwords
        if ($t eq 'mailbox') {
            $template->param( user => $q->param('user')
                            , forwards => $q->param('forwards') );
        }
        elsif ($t eq 'alias') {
            $template->param( alias => $q->param('alias')
                            , maildrop => $q->param('maildrop') );
        }
        elsif ($t eq 'list') {
            $template->param( list => $q->param('list')
                            , isenc => $q->param('transport') eq 'schleuder' );
        }
        else {
            # Unknown type
            return $self->redirect($q->url.'/'.$d.'/');
        }
        $template->param( isactive => $q->param('isactive')
                        , description => $q->param('description')
                        , error => encode_entities ($error, "‘‘") );
    }
    else {
        $template->param( isactive => 1 );
    }
    return $template->output;
}


=head1 AUTHOR

Guilhem Moulin C<< <guilhem at fripost.org> >>

=head1 COPYRIGHT

Copyright 2012 Guilhem Moulin.

=head1 LICENSE

This program is free software; you can redistribute it and/or modify it
under the same terms as perl itself.

=cut

1;

__END__