#!/usr/bin/env perl
# 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 local/lib/perl5);

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 $cgi      = Bugzilla->cgi;
  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'} = 'classifications.html';

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

#
# Preliminary checks:
#

Bugzilla->login(LOGIN_REQUIRED);

print $cgi->header();

Bugzilla->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);

  $classification->set_name($class_name);
  $classification->set_description(scalar $cgi->param('description'));
  $classification->set_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")) {
        $sth->execute($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")) {
        $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});