#!/usr/bin/perl -T
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.


use 5.10.1;
use strict;
use warnings;

use lib qw(. lib);

use Bugzilla;
use Bugzilla::Constants;
use Bugzilla::Util;
use Bugzilla::Error;
use Bugzilla::Classification;
use Bugzilla::Token;

my $dbh = Bugzilla->dbh;
my $cgi = Bugzilla->cgi;
my $template = Bugzilla->template;
local our $vars = {};

sub LoadTemplate {
    my $action = shift;
    my $template = Bugzilla->template;

    $vars->{'classifications'} = [Bugzilla::Classification->get_all]
      if ($action eq 'select');
    # There is currently only one section about classifications,
    # so all pages point to it. Let's define it here.
    $vars->{'doc_section'} = 'administering/categorization.html#classifications';

    $action =~ /(\w+)/;
    $action = $1;
    $template->process("admin/classifications/$action.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
    exit;
}

#
# Preliminary checks:
#

my $user = Bugzilla->login(LOGIN_REQUIRED);

print $cgi->header();

$user->in_group('editclassifications')
  || ThrowUserError("auth_failure", {group  => "editclassifications",
                                     action => "edit",
                                     object => "classifications"});

ThrowUserError("auth_classification_not_enabled") 
    unless Bugzilla->params->{"useclassification"};

#
# often used variables
#
my $action     = trim($cgi->param('action')         || '');
my $class_name = trim($cgi->param('classification') || '');
my $token      = $cgi->param('token');

#
# action='' -> Show nice list of classifications
#
LoadTemplate('select') unless $action;

#
# action='add' -> present form for parameters for new classification
#
# (next action will be 'new')
#

if ($action eq 'add') {
    $vars->{'token'} = issue_session_token('add_classification');
    LoadTemplate($action);
}

#
# action='new' -> add classification entered in the 'action=add' screen
#

if ($action eq 'new') {
    check_token_data($token, 'add_classification');

    my $classification =
      Bugzilla::Classification->create({name        => $class_name,
                                        description => scalar $cgi->param('description'),
                                        sortkey     => scalar $cgi->param('sortkey')});

    delete_token($token);

    $vars->{'message'} = 'classification_created';
    $vars->{'classification'} = $classification;
    $vars->{'classifications'} = [Bugzilla::Classification->get_all];
    $vars->{'token'} = issue_session_token('reclassify_classifications');
    LoadTemplate('reclassify');
}

#
# action='del' -> ask if user really wants to delete
#
# (next action would be 'delete')
#

if ($action eq 'del') {

    my $classification = Bugzilla::Classification->check($class_name);

    if ($classification->id == 1) {
        ThrowUserError("classification_not_deletable");
    }

    if ($classification->product_count()) {
        ThrowUserError("classification_has_products");
    }

    $vars->{'classification'} = $classification;
    $vars->{'token'} = issue_session_token('delete_classification');

    LoadTemplate($action);
}

#
# action='delete' -> really delete the classification
#

if ($action eq 'delete') {
    check_token_data($token, 'delete_classification');

    my $classification = Bugzilla::Classification->check($class_name);
    $classification->remove_from_db;
    delete_token($token);

    $vars->{'message'} = 'classification_deleted';
    $vars->{'classification'} = $classification;
    LoadTemplate('select');
}

#
# action='edit' -> present the edit classifications from
#
# (next action would be 'update')
#

if ($action eq 'edit') {
    my $classification = Bugzilla::Classification->check($class_name);

    $vars->{'classification'} = $classification;
    $vars->{'token'} = issue_session_token('edit_classification');

    LoadTemplate($action);
}

#
# action='update' -> update the classification
#

if ($action eq 'update') {
    check_token_data($token, 'edit_classification');

    my $class_old_name = trim($cgi->param('classificationold') || '');
    my $classification = Bugzilla::Classification->check($class_old_name);

    $classification->set_all({
        name        => $class_name,
        description => scalar $cgi->param('description'),
        sortkey     => scalar $cgi->param('sortkey'),
    });

    my $changes = $classification->update;
    delete_token($token);

    $vars->{'message'} = 'classification_updated';
    $vars->{'classification'} = $classification;
    $vars->{'changes'} = $changes;
    LoadTemplate('select');
}

#
# action='reclassify' -> reclassify products for the classification
#

if ($action eq 'reclassify') {
    my $classification = Bugzilla::Classification->check($class_name);

    my $sth = $dbh->prepare("UPDATE products SET classification_id = ?
                             WHERE name = ?");
    my @names;

    if (defined $cgi->param('add_products')) {
        check_token_data($token, 'reclassify_classifications');
        if (defined $cgi->param('prodlist')) {
            foreach my $prod ($cgi->param("prodlist")) {
                trick_taint($prod);
                $sth->execute($classification->id, $prod);
                push @names, $prod;
            }
        }
        delete_token($token);
    } elsif (defined $cgi->param('remove_products')) {
        check_token_data($token, 'reclassify_classifications');
        if (defined $cgi->param('myprodlist')) {
            foreach my $prod ($cgi->param("myprodlist")) {
                trick_taint($prod);
                $sth->execute(1, $prod);
                push @names, $prod;
            }
        }
        delete_token($token);
    }

    $vars->{'classifications'} = [Bugzilla::Classification->get_all];
    $vars->{'classification'} = $classification;
    $vars->{'token'} = issue_session_token('reclassify_classifications');

    foreach my $name (@names) {
        Bugzilla->memcached->clear({ table => 'products', name => $name });
    }
    Bugzilla->memcached->clear_config();

    LoadTemplate($action);
}

#
# No valid action found
#

ThrowUserError('unknown_action', {action => $action});