#!/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::Util;
use Bugzilla::Error;
use Bugzilla::Constants;
use Bugzilla::Token;
use Bugzilla::Field;
use Bugzilla::Field::Choice;

###############
# Subroutines #
###############

sub display_field_values {
  my $vars     = shift;
  my $template = Bugzilla->template;
  $vars->{'values'} = $vars->{'field'}->legal_values;
  $template->process("admin/fieldvalues/list.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

######################################################################
# Main Body Execution
######################################################################

# require the user to have logged in
my $user = Bugzilla->login(LOGIN_REQUIRED);

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

# Replace this entry by separate entries in templates when
# the documentation about legal values becomes bigger.
$vars->{'doc_section'} = 'administering/field-values.html';

print $cgi->header();

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

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

#
# field = '' -> Show nice list of fields
#
if (!$cgi->param('field')) {
  my @field_list = @{Bugzilla->fields({is_select => 1, is_abnormal => 0})};

  $vars->{'fields'} = \@field_list;
  $template->process("admin/fieldvalues/select-field.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

# At this point, the field must be defined.
my $field = Bugzilla::Field->check($cgi->param('field'));
if (!$field->is_select || $field->is_abnormal) {
  ThrowUserError('fieldname_invalid', {field => $field});
}
$vars->{'field'} = $field;

#
# action='' -> Show nice list of values.
#
display_field_values($vars) unless $action;

#
# action='add' -> show form for adding new field value.
# (next action will be 'new')
#
if ($action eq 'add') {
  $vars->{'token'} = issue_session_token('add_field_value');
  $template->process("admin/fieldvalues/create.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

#
# action='new' -> add field value entered in the 'action=add' screen
#
if ($action eq 'new') {
  check_token_data($token, 'add_field_value');

  my $created_value = Bugzilla::Field::Choice->type($field)->create({
    value               => scalar $cgi->param('value'),
    sortkey             => scalar $cgi->param('sortkey'),
    is_open             => scalar $cgi->param('is_open'),
    visibility_value_id => scalar $cgi->param('visibility_value_id'),
  });

  delete_token($token);

  $vars->{'message'} = 'field_value_created';
  $vars->{'value'}   = $created_value;
  display_field_values($vars);
}

# After this, we always have a value
my $value = Bugzilla::Field::Choice->type($field)->check($cgi->param('value'));
$vars->{'value'} = $value;

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

  # If the value cannot be deleted, throw an error.
  if ($value->is_static) {
    ThrowUserError('fieldvalue_not_deletable', $vars);
  }
  $vars->{'token'} = issue_session_token('delete_field_value');

  $template->process("admin/fieldvalues/confirm-delete.html.tmpl", $vars)
    || ThrowTemplateError($template->error());

  exit;
}


#
# action='delete' -> really delete the field value
#
if ($action eq 'delete') {
  check_token_data($token, 'delete_field_value');
  $value->remove_from_db();
  delete_token($token);
  $vars->{'message'}      = 'field_value_deleted';
  $vars->{'no_edit_link'} = 1;
  display_field_values($vars);
}


#
# action='edit' -> present the edit-value form
# (next action would be 'update')
#
if ($action eq 'edit') {
  $vars->{'token'} = issue_session_token('edit_field_value');
  $template->process("admin/fieldvalues/edit.html.tmpl", $vars)
    || ThrowTemplateError($template->error());

  exit;
}


#
# action='update' -> update the field value
#
if ($action eq 'update') {
  check_token_data($token, 'edit_field_value');
  $vars->{'value_old'} = $value->name;
  my %params = (
    name             => scalar $cgi->param('value_new'),
    sortkey          => scalar $cgi->param('sortkey'),
    visibility_value => scalar $cgi->param('visibility_value_id'),
  );
  if ($cgi->should_set('is_active')) {
    $params{is_active} = $cgi->param('is_active');
  }
  $value->set_all(\%params);
  $vars->{'changes'} = $value->update();
  delete_token($token);
  $vars->{'message'} = 'field_value_updated';
  display_field_values($vars);
}

# No valid action found
ThrowUserError('unknown_action', {action => $action});