# Selima Website Content Management System
# LinkCatz.pm: The related-link category membership form checker.

#  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: 2004-11-03

package Selima::Checker::LinkCatz;
use 5.008;
use strict;
use warnings;
use base qw(Selima::Checker);

use Selima::ChkFunc;
use Selima::CallForm;
use Selima::DataVars qw($DBH :forms);
use Selima::ShortCut;

# new: Initialize the checker
sub new : method {
    local ($_, %_);
    my $class;
    ($class, @_) = @_;
    $_[1] = "linkcatz" if scalar(@_) < 2 || !defined $_[1];
    return $class->SUPER::new(@_);
}

# check: Run a list of checks
sub check : method {
    local ($_, %_);
    my ($self, $error, @cols);
    ($self, @cols) = @_;
    # Run the parent method first
    $error = $self->SUPER::check(@cols);
    return $error if defined $error;
    # See if we need to check the duplicates.  Check it in the end.
    %_ = map { $_ => 1 } @cols;
    if (exists $_{"cat"} && exists $_{"link"}) {
        $error = $self->__check_dup();
        return $error if defined $error;
    }
    return;
}

# _check_cat: Check the category
sub _check_cat : method {
    local ($_, %_);
    my ($self, $form, $error);
    $self = $_[0];
    $form = $self->{"form"};
    # Check if it exists
    $error = $self->_missing("cat");
    return $error if defined $error;
    # Regularize it
    $self->_trim("cat");
    # Check if it is filled
    return {"msg"=>N_("Please select a category.")}
        if $form->param("cat") eq "";
    # Check if the category exists
    return {"msg"=>N_("This category does not exist anymore.  Please select another one.")}
        if !check_sn_in ${$form->param_fetch("cat")}[0], "linkcat";
    # OK
    return;
}

# _check_link: Check the related link
sub _check_link : method {
    local ($_, %_);
    my ($self, $form, $error);
    $self = $_[0];
    $form = $self->{"form"};
    # Check if it exists
    $error = $self->_missing("link");
    return $error if defined $error;
    # Regularize it
    $self->_trim("link");
    # Check if it is filled
    return {"msg"=>N_("Please select a related link.")}
        if $form->param("link") eq "";
    # Check if this link exists
    return {"msg"=>N_("This related link does not exist anymore.  Please select another one.")}
        if !check_sn_in ${$form->param_fetch("link")}[0], "links";
    # OK
    return;
}

# __check_dup: Check if this item is duplicated
sub __check_dup : method {
    local ($_, %_);
    my ($self, $form, $error, $sth, $sql);
    $self = $_[0];
    $form = $self->{"form"};
    @_ = qw();
    push @_, "cat=" . $form->param("cat");
    push @_, "link=" . $form->param("link");
    push @_, "sn!=" . $self->{"sn"}
        if $self->{"iscur"};
    $sql = "SELECT * FROM " . $DBH->quote_identifier($self->{"table"})
        . " WHERE " . join(" AND ", @_) . ";\n";
    $sth = $DBH->prepare($sql);
    $sth->execute;
    return {"msg"=>N_("This categorization record already exists.  You cannot create a duplicated one.")}
        if $sth->rows > 0;
    return;
}

# _redir_selcat: Suspend and move to the category selection form
sub _redir_selcat : method {
    local ($_, %_);
    my $self;
    $self = $_[0];
    # Skip if not requested
    return if $self->_missing("selcat");
    call_form FORM_LINKCAT, undef, "import_selcat";
}

# _redir_delcat: Remove the category
sub _redir_delcat : method {
    local ($_, %_);
    my $self;
    $self = $_[0];
    # Skip if not requested
    return if $self->_missing("delcat");
    $self->{"form"}->delete("cat");
    success_redirect undef;
}

# _redir_sellink: Suspend and move to the related link selection form
sub _redir_sellink : method {
    local ($_, %_);
    my $self;
    $self = $_[0];
    # Skip if not requested
    return if $self->_missing("sellink");
    call_form FORM_LINKS, undef, "import_sellink";
}

# _redir_dellink: Remove the related link
sub _redir_dellink : method {
    local ($_, %_);
    my $self;
    $self = $_[0];
    # Skip if not requested
    return if $self->_missing("dellink");
    $self->{"form"}->delete("link");
    success_redirect undef;
}

return 1;