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#!/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::Error;
use Bugzilla::Keyword;
use Bugzilla::Product;
use Bugzilla::Status;
use Bugzilla::Field;

use Digest::MD5 qw(md5_base64);

my $user = Bugzilla->login(LOGIN_OPTIONAL);
my $cgi  = Bugzilla->cgi;

# Get data from the shadow DB as they don't change very often.
Bugzilla->switch_to_shadow_db;

# If the 'requirelogin' parameter is on and the user is not
# authenticated, return empty fields.
if (Bugzilla->params->{'requirelogin'} && !$user->id) {
  display_data();
  exit;
}

# Pass a bunch of Bugzilla configuration to the templates.
my $vars = {};
$vars->{'priority'}   = get_legal_field_values('priority');
$vars->{'severity'}   = get_legal_field_values('bug_severity');
$vars->{'platform'}   = get_legal_field_values('rep_platform');
$vars->{'op_sys'}     = get_legal_field_values('op_sys');
$vars->{'keywords'}   = [Bugzilla::Keyword->get_all];
$vars->{'resolution'} = get_legal_field_values('resolution');
$vars->{'status'}     = get_legal_field_values('bug_status');
$vars->{'custom_fields'}
  = [grep { $_->is_select } Bugzilla->active_custom_fields];

# Include a list of product objects.
if ($cgi->param('product')) {
  my @products = $cgi->param('product');
  foreach my $product_name (@products) {

    # We don't use check() because config.cgi outputs mostly
    # in XML and JS and we don't want to display an HTML error
    # instead of that.
    my $product = new Bugzilla::Product({name => $product_name});
    if ($product && $user->can_see_product($product->name)) {
      push(@{$vars->{'products'}}, $product);
    }
  }
}
else {
  $vars->{'products'} = $user->get_selectable_products;
}

# We set the 2nd argument to 1 to also preload flag types.
Bugzilla::Product::preload($vars->{'products'}, 1);

if (Bugzilla->params->{'useclassification'}) {
  my $class = {};

  # Get all classifications with at least one selectable product.
  foreach my $product (@{$vars->{'products'}}) {
    $class->{$product->classification_id} ||= $product->classification;
  }
  my @classifications
    = sort { $a->sortkey <=> $b->sortkey || lc($a->name) cmp lc($b->name) }
    (values %$class);
  $vars->{'class_names'}     = $class;
  $vars->{'classifications'} = \@classifications;
}

# Allow consumers to specify whether or not they want flag data.
if (defined $cgi->param('flags')) {
  $vars->{'show_flags'} = $cgi->param('flags');
}
else {
  # We default to sending flag data.
  $vars->{'show_flags'} = 1;
}

# Create separate lists of open versus resolved statuses.  This should really
# be made part of the configuration.
my @open_status;
my @closed_status;
foreach my $status (@{$vars->{'status'}}) {
  is_open_state($status)
    ? push(@open_status,   $status)
    : push(@closed_status, $status);
}
$vars->{'open_status'}   = \@open_status;
$vars->{'closed_status'} = \@closed_status;

# Generate a list of fields that can be queried.
my @fields = @{Bugzilla::Field->match({obsolete => 0})};

# Exclude fields the user cannot query.
if (!$user->is_timetracker) {
  foreach my $tt_field (TIMETRACKING_FIELDS) {
    @fields = grep { $_->name ne $tt_field } @fields;
  }
}

my %FIELD_PARAMS = (
  classification   => 'useclassification',
  target_milestone => 'usetargetmilestone',
  qa_contact       => 'useqacontact',
## REDHAT EXTENSION START 876015
  docs_contact => 'usedocscontact',
## REDHAT EXTENSION END 876015
  status_whiteboard => 'usestatuswhiteboard',
  see_also          => 'use_see_also',
);
foreach my $field (@fields) {
  my $param = $FIELD_PARAMS{$field->name};
  $field->{is_active} = Bugzilla->params->{$param} if $param;
}
$vars->{'field'} = \@fields;

display_data($vars);


sub display_data {
  my $vars = shift;

  my $cgi      = Bugzilla->cgi;
  my $template = Bugzilla->template;

  # Determine how the user would like to receive the output;
  # default is JavaScript.
  my $format = $template->get_format(
    "config",
    scalar($cgi->param('format')),
    scalar($cgi->param('ctype')) || "js"
  );

  # Generate the configuration data.
  my $output;
  $template->process($format->{'template'}, $vars, \$output)
    || ThrowTemplateError($template->error());

  # Wide characters cause md5_base64() to die.
  my $digest_data = $output;
  utf8::encode($digest_data) if utf8::is_utf8($digest_data);
  my $digest = md5_base64($digest_data);

  if ($cgi->check_etag($digest)) {
    print $cgi->header(-ETag => $digest, -status => '304 Not Modified');
    exit;
  }

  print $cgi->header(-ETag => $digest, -type => $format->{'ctype'});
  print $output;
}