#!/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::Milestone;
use Bugzilla::Token;

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

# There is only one section about milestones in the documentation,
# so all actions point to the same page.
$vars->{'doc_section'} = 'milestones.html';

#
# Preliminary checks:
#

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

print $cgi->header();

$user->in_group('editcomponents')
  || scalar(@{$user->get_products_by_permission('editcomponents')})
  || ThrowUserError("auth_failure",
  {group => "editcomponents", action => "edit", object => "milestones"});

#
# often used variables
#
my $product_name   = trim($cgi->param('product')   || '');
my $milestone_name = trim($cgi->param('milestone') || '');
my $sortkey        = trim($cgi->param('sortkey')   || 0);
my $action         = trim($cgi->param('action')    || '');
my $showbugcounts  = (defined $cgi->param('showbugcounts'));
my $token          = $cgi->param('token');
my $isactive       = $cgi->param('isactive');

#
# product = '' -> Show nice list of products
#

unless ($product_name) {
  my $selectable_products = $user->get_selectable_products;

  # If the user has editcomponents privs for some products only,
  # we have to restrict the list of products to display.
  unless ($user->in_group('editcomponents')) {
    $selectable_products = $user->get_products_by_permission('editcomponents');
  }
  $vars->{'products'}      = $selectable_products;
  $vars->{'showbugcounts'} = $showbugcounts;

  $template->process("admin/milestones/select-product.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

my $product = $user->check_can_admin_product($product_name);

#
# action='' -> Show nice list of milestones
#

unless ($action) {

  $vars->{'showbugcounts'} = $showbugcounts;
  $vars->{'product'}       = $product;
  $template->process("admin/milestones/list.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

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

if ($action eq 'add') {
  $vars->{'token'}   = issue_session_token('add_milestone');
  $vars->{'product'} = $product;
  $template->process("admin/milestones/create.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

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

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

  my $milestone
    = Bugzilla::Milestone->create({
    value => $milestone_name, product => $product, sortkey => $sortkey
    });

  delete_token($token);

  $vars->{'message'}   = 'milestone_created';
  $vars->{'milestone'} = $milestone;
  $vars->{'product'}   = $product;
  $template->process("admin/milestones/list.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

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

if ($action eq 'del') {
  my $milestone
    = Bugzilla::Milestone->check({product => $product, name => $milestone_name});

  $vars->{'milestone'} = $milestone;
  $vars->{'product'}   = $product;

  # The default milestone cannot be deleted.
  if ($product->default_milestone eq $milestone->name) {
    ThrowUserError("milestone_is_default", {milestone => $milestone});
  }
  $vars->{'token'} = issue_session_token('delete_milestone');

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

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

if ($action eq 'delete') {
  check_token_data($token, 'delete_milestone');
  my $milestone
    = Bugzilla::Milestone->check({product => $product, name => $milestone_name});
  $milestone->remove_from_db;
  delete_token($token);

  $vars->{'message'}                = 'milestone_deleted';
  $vars->{'milestone'}              = $milestone;
  $vars->{'product'}                = $product;
  $vars->{'no_edit_milestone_link'} = 1;

  $template->process("admin/milestones/list.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

#
# action='edit' -> present the edit milestone form
#
# (next action would be 'update')
#

if ($action eq 'edit') {

  my $milestone
    = Bugzilla::Milestone->check({product => $product, name => $milestone_name});

  $vars->{'milestone'} = $milestone;
  $vars->{'product'}   = $product;
  $vars->{'token'}     = issue_session_token('edit_milestone');

  $template->process("admin/milestones/edit.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

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

if ($action eq 'update') {
  check_token_data($token, 'edit_milestone');
  my $milestone_old_name = trim($cgi->param('milestoneold') || '');
  my $milestone = Bugzilla::Milestone->check(
    {product => $product, name => $milestone_old_name});

  $milestone->set_name($milestone_name);
  $milestone->set_sortkey($sortkey);
  $milestone->set_is_active($isactive);
  my $changes = $milestone->update();

  # Reloading the product since the default milestone name
  # could have been changed.
  $product = new Bugzilla::Product({name => $product_name});

  delete_token($token);

  $vars->{'message'}   = 'milestone_updated';
  $vars->{'milestone'} = $milestone;
  $vars->{'product'}   = $product;
  $vars->{'changes'}   = $changes;
  $template->process("admin/milestones/list.html.tmpl", $vars)
    || ThrowTemplateError($template->error());
  exit;
}

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