# Selima Website Content Management System
# ListPref.pm: The list preference administration.

#  Copyright (c) 2004-2018 imacat.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

# Author: imacat <imacat@mail.imacat.idv.tw>
# First written: 2004-10-14

package Selima::ListPref;
use 5.008;
use strict;
use warnings;

use Fcntl qw(:flock);
use URI qw();

use Selima::AddGet;
use Selima::CallForm;
use Selima::DataVars qw($DBH :env :requri);
use Selima::HTTP;

use Selima::Checker::ListPref;
use Selima::Processor::ListPref;

# Load these classes
use Selima::ListPref::AcctReps;

# new: Initialize the handler
sub new : method {
    local ($_, %_);
    my ($class, $form, $self);
    ($class, $form) = @_;
    $self = bless {}, $class;
    $self->{"form"} = $form;
    $self->_set_referer;
    $self->_set_domain;
    return $self;
}

# main: Change the list preference
sub main : method {
    local ($_, %_);
    my ($self, $error, $processor);
    $self = $_[0];
    # Lock the necessary tables
    $DBH->lock("userpref" => LOCK_EX);
    
    $error = $self->_check_post();
    # If an error occurs
    if (defined $error) {
        $$error{"isform"} = 0;
        error_redirect $error;
    
    # Else, save the data
    } else {
        $processor = new Selima::Processor::ListPref($self->{"form"});
        $processor->process;
        http_303 $self->{"referer"};
    }
}

# _check_post: Check the list preference form
sub _check_post : method {
    local ($_, %_);
    my ($self, $checker, $error);
    $self = $_[0];
    # Run the checker
    $checker = new Selima::Checker::ListPref($self->{"form"});
    $error = $checker->check(qw(domain listcols listsize));
    return $error if defined $error;
    # OK
    return;
}

# _set_referer: Obtain the referer to return to
sub _set_referer : method {
    local ($_, %_);
    my $self;
    $self = $_[0];
    # Obtained before
    return $self->{"referer"} if exists $self->{"referer"};
    # Remove the status from the source referer
    return ($self->{"referer"} = rem_get_arg $self->_source_referer, "statid");
}

# _source_referer: Obtain the source referer
sub _source_referer : method {
    local ($_, %_);
    my ($self, $r);
    $self = $_[0];
    # Use the POSTed referer
    return $_ if defined($_ = $self->{"form"}->param("referer"));
    # Use the referer from the request
    if ($IS_MODPERL) {
        $r = $IS_MP2? Apache2::RequestUtil->request:
            Apache->request;
        return $_ if defined($_ = $r->headers_in->get("Referer"));
    } else {
        return $ENV{"HTTP_REFERER"} if exists $ENV{"HTTP_REFERER"};
    }
    # Fall back to myself
    return $REQUEST_FULLURI;
}

# _set_domain: Obtain the domain this preference belongs to
sub _set_domain : method {
    local ($_, %_);
    my ($self, $form, $uri);
    $self = $_[0];
    $form = $self->{"form"};
    # Obtained before
    return $self->{"domain"} if exists $self->{"domain"};
    # Return the supplied domain
    return ($self->{"domain"} = $_)
        if defined($_ = $form->param("domain"));
    # Obtain the referer first
    $self->_set_referer;
    # Return the current script path for the most cases
    if ($self->{"referer"} eq $REQUEST_FULLURI) {
        $self->{"domain"} = $REQUEST_PATH;
        $form->param("domain", $self->{"domain"});
        return $self->{"domain"};
    }
    
    # Parse the referer to get the script path
    $uri = new URI($self->{"referer"});
    # Fall back to the root directory if there is no script part
    $self->{"domain"} = (($_ = $uri->path) ne "")? $_: "/";
    # Strip the leading root difference
    $self->{"domain"} =~ s/^$ROOT_DIFF//;
    $form->param("domain", $self->{"domain"});
    return $self->{"domain"};
}

return 1;