#! /usr/bin/perl -w
# Emily Wu's Website
# logout.cgi: The log-out script.

#  Copyright (c) 2004-2021 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: 2004-10-16

use 5.008;
use strict;
use warnings;
use lib $ENV{"DOCUMENT_ROOT"} . qw(/magicat/lib/perl5);
use Selima::emily;
local $SIG{"__DIE__"} = \&http_500;
my $d = new Selima::Destroy;
# Prototype declaration
sub main();
sub check_get();
sub check_post();
sub html_page($);
sub html_logoutform();
sub html_relogin();

initenv(-dbi        => DBI_NONE,
        -lastmod    => 1,
        -page_param => {"keywords"              => N_("log out")});

main;
exit 0;

sub main() {
    local ($_, %_);
    my ($error, $success, $processor);
    
    # If the request is a GET query
    if ($ENV{"REQUEST_METHOD"} ne "POST") {
        $error = check_get;
        # If an error occurs
        if (defined $error) {
            html_page $error;
        
        # Display the page
        } else {
            html_page retrieve_status;
        }
    
    # If a form was POSTed from the client
    } else {
        $error = check_post;
        # If an error occurs
        if (defined $error) {
            error_redirect $error;
        
        # Else, save the data
        } else {
            $processor = new Selima::Processor::LogOut($POST);
            $success = $processor->process;
            success_redirect $success;
        }
    }
    return;
}

# check_get: Check the GET arguments
sub check_get() {
    local ($_, %_);
    my $status;
    # There is a result to display
    $status = retrieve_status;
    # Successfully logged out
    if (    defined $status
            && exists $$status{"status"}
            && $$status{"status"} eq "success") {
        # Nothing to check
        return;
    }
    # Check if this user has logged in
    unauth unless defined get_login_sn;
    # OK
    return;
}

# check_post: Check the POSTed form
sub check_post() {
    local ($_, %_);
    # Check if this user has logged in
    unauth unless defined get_login_sn;
    # OK
    return;
}

# html_page: Display the page
sub html_page($) {
    local ($_, %_);
    my $status;
    $status = $_[0];
    # Not logged out yet
    if (defined get_login_sn) {
        html_header __("Log Out");
        html_errmsg $status;
        html_logoutform;
        html_footer;
    
    # Logged out
    } else {
        html_header __("Log Out");
        html_errmsg $status;
        html_relogin;
        html_footer;
    }
    return;
}


##################################
# Subroutines to manage the data #
##################################
# html_logoutform: Display a form to log out
sub html_logoutform() {
    local ($_, %_);
    my ($msg, $submit);
    $msg = h(__("Are you sure you want to log out?"));
    $submit = h(__("Log out"));
    print << "EOT";
<form action="$REQUEST_FILE" method="post">
<div>
<p>$msg</p>
<input type="submit" value="$submit" />
</div>
</form>

EOT
    return;
}

# html_relogin: Display links to log in again
sub html_relogin() {
    local ($_, %_);
    $_ = h(__("Log in again."));
    print << "EOT";
<p><a href="/magicat/cgi-bin/login.cgi">$_</a></p>

EOT
    return;
}