# Base package for simple issuers plugins
#
# Issuer should just implement a run() method that will be called only for
# authenticated users when PATH_INFO starts with issuerDBXXPath
#
# run() should just return a Lemonldap::NG::Portal::Main::Constants value. It
# is called using process() method (Lemonldap::NG::Portal::Main::Process)
package Lemonldap::NG::Portal::Main::Issuer;

use strict;
use Mouse;
use Lemonldap::NG::Portal::Main::Constants qw(PE_OK);

extends 'Lemonldap::NG::Portal::Main::Plugin';

our $VERSION = '2.0.0';

# PROPERTIES

has type => ( is => 'rw' );

has path => ( is => 'rw' );

# INTERFACE

# Only logout is called in normal use. Issuer that inherits from this
# package are called only by their path
sub beforeLogout { 'logout' }

# INITIALIZATION

sub init {
    my ($self) = @_;
    my $type = ref( $_[0] );
    $type =~ s/.*:://;
    $self->type($type);
    if ( my $path = $self->conf->{"issuerDB${type}Path"} ) {
        $path =~ s/^.*?(\w+).*?$/$1/;
        $self->path($path);
        $self->addUnauthRoute( $path => { '*' => '_redirect' },  ['GET'] );
        $self->addUnauthRoute( $path => { '*' => '_pRedirect' }, ['POST'] );
        $self->addAuthRoute( $path => { '*' => "_forAuthUser" },  ['GET'] );
        $self->addAuthRoute( $path => { '*' => "_pForAuthUser" }, ['POST'] );
    }
    else {
        $self->lmLog( "No path declared for issuer $type. Skipping", 'debug' );
    }
}

# RUNNING METHODS

# Case 1: Unauthentified users are redirected to the main portal

sub _redirect {
    my ( $self, $req, @path ) = @_;
    $self->lmLog( 'Processing _redirect', 'debug' );
    my $prms = $req->params;
    foreach my $k ( keys %$prms ) {
        $self->p->setHiddenFormValue( $req, $k, $prms->{$k}, '', 0 );
    }
    $self->p->setHiddenFormValue( $req, 'issuerMethod', $req->method, '', 0 );
    $self->p->setHiddenFormValue( $req, 'issuerQuery',  $req->query,  '', 0 );
    $req->{urldc} =
        $self->conf->{portal}
      . $req->path
      . ( $req->query ? '?' . $req->query : '' );

    # TODO: launch normal process with 'run' at the end
    return $self->p->do(
        $req,
        [
            'controlUrl',
            @{ $self->p->beforeAuth },
            $self->p->authProcess,
            @{ $self->p->betweenAuthAndDatas },
            $self->p->sessionDatas,
            @{ $self->p->afterDatas },
            sub {
                return $self->run( @_, @path );
              }
        ]
    );
}

sub _pRedirect {
    my ( $self, $req, @path ) = @_;
    $self->lmLog( '_pRedirect: parsing posted datas', 'debug' );
    $req->parseBody;
    return $self->_redirect( $req, @path );
}

# Case 3: authentified user, launch
sub _forAuthUser {
    my ( $self, $req, @path ) = @_;
    $self->lmLog( 'Processing _forAuthUser', 'debug' );
    return $self->p->do(
        $req,
        [
            'importHandlerDatas',
            'controlUrl',
            @{ $self->p->forAuthUser },
            sub {
                return $self->run( @_, @path );
            },
        ]
    );
}

sub _pForAuthUser {
    my ( $self, $req ) = @_;
    $self->lmLog( 'Parsing posted datas', 'debug' );
    $req->parseBody;
    return $self->_forAuthUser($req);
}

1;
__END__

=pod

=encoding utf8

=head1 NAME

Lemonldap::NG::Portal::Main::Issuer - Base class for identity providers.

=head1 SYNOPSIS

  package Lemonldap::NG::Portal::Issuer::My;
  use strict;
  use Mouse;
  extends 'Lemonldap::NG::Portal::Main::Issuer';
  use Lemonldap::NG::Portal::Main::Constants qw(PE_OK);
  
  # Optional initialization method
  sub init {
      my ($self) = @_;
      ...
      # Must return 1 (succeed) or 0 (failure)
  }
  
  # Required methods are run() and logout(), they are launched only for
  # authenticated users
  # $req is a Lemonldap::NG::Portal::Main::Request object
  # They must return a Lemonldap::NG::Portal::Main::Constants constant
  sub run {
      my ( $self, $req ) = @_
      ...
      return PE_OK
  }
  
  sub logout {
      my ( $self, $req ) = @_
      ...
      return PE_OK
  }
  1;

=head1 DESCRIPTION

Lemonldap::NG::Portal::Main::Issuer is a base class to write identity providers
for Lemonldap::NG web-SSO system. It provide several methods to write easily
an IdP and manage authentication if the identity request comes before
authentication.

=head1 WRITING AN IDENTITY PROVIDER

To write a classic identity provider, you just have to inherit this class and
write run() and logout() methods. These methods must return a
Lemonldap::NG::Portal::Main::Constants constant.

A classic identity provider needs a "issuerDBE<gt>XXXE<lt>Path" parameter in
LLNG configuration to declare its base URI path (see
L<Lemonldap::NG::Manager::Build>). Example: /saml/. All requests that starts
with /saml/ will call run() after authentication if needed, and no one else.

The logout() function is called when user asks for logout on this server. If
you want to write an identity provider, you must implement a single logout
system.

=head2 managing other URI path

Lemonldap::NG::Portal::Main::Issuer provides methods to bind a method to an
URI path:

=over

=item addAuthRoute() for authenticated users

=item addUnauthRoute() for unauthenticated users

=back

They must be called during initialization process (so you must write the
optional init() sub).

Example:

  sub init {
      my ($self) = @_;
      ...
      $self->addUnauthRoute( saml => { soap => 'soapServer' }, [ 'POST' ] );
      return 1;
  }
  sub soapServer {
      my ( $self, $req ) = @_;
      ...
      # You must return a valid PSGI response
      return [ 200, [ 'Content-Type' => 'application/xml' ], [] ];
  }

=head1 SEE ALSO

L<http://lemonldap-ng.org/>

=head1 AUTHOR

=over

=item Clement Oudot, E<lt>clem.oudot@gmail.comE<gt>

=item Xavier Guimard, E<lt>x.guimard@free.frE<gt>

=back

=head1 BUG REPORT

Use OW2 system to report bug or ask for features:
L<http://jira.ow2.org>

=head1 DOWNLOAD

Lemonldap::NG is available at
L<http://forge.objectweb.org/project/showfiles.php?group_id=274>

=head1 COPYRIGHT AND LICENSE

=over

=item Copyright (C) 2016 by Xavier Guimard, E<lt>x.guimard@free.frE<gt>

=item Copyright (C) 2016 by Clement Oudot, E<lt>clem.oudot@gmail.comE<gt>

=back

This library 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, see L<http://www.gnu.org/licenses/>.

=cut