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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 local/lib/perl5);

use Bugzilla;
use Bugzilla::Constants;
use Bugzilla::Util;
use Bugzilla::CGI;
use Bugzilla::Search::Saved;
use Bugzilla::Error;
use Bugzilla::User;
use Bugzilla::Token;
use Module::Runtime qw(require_module);

use Storable qw(dclone);

# Maps parameters that control columns to the names of columns.
use constant COLUMN_PARAMS => {
  'useclassification'   => ['classification'],
  'usebugaliases'       => ['alias'],
  'usetargetmilestone'  => ['target_milestone'],
  'useqacontact'        => ['qa_contact', 'qa_contact_realname'],
  'usestatuswhiteboard' => ['status_whiteboard'],
};

# We only show these columns if an object of this type exists in the
# database.
use constant COLUMN_CLASSES =>
  {'Bugzilla::Flag' => 'flagtypes.name', 'Bugzilla::Keyword' => 'keywords',};

Bugzilla->login();

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

my $columns = dclone(Bugzilla::Search::COLUMNS);

# You can't manually select "relevance" as a column you want to see.
delete $columns->{'relevance'};

foreach my $param (keys %{COLUMN_PARAMS()}) {
  next if Bugzilla->params->{$param};
  foreach my $column (@{COLUMN_PARAMS->{$param}}) {
    delete $columns->{$column};
  }
}

foreach my $class (keys %{COLUMN_CLASSES()}) {
  require_module($class);
  my $column = COLUMN_CLASSES->{$class};
  delete $columns->{$column} if !$class->any_exist;
}

if (!Bugzilla->user->is_timetracker) {
  foreach my $column (TIMETRACKING_FIELDS) {
    delete $columns->{$column};
  }
}

$vars->{'columns'} = $columns;

my @collist;
if (defined $cgi->param('rememberedquery')) {
  my $search;
  if (defined $cgi->param('saved_search')) {
    $search = new Bugzilla::Search::Saved($cgi->param('saved_search'));
  }

  my $token = $cgi->param('token');
  if ($search) {
    check_hash_token($token, [$search->id, $search->name]);
  }
  else {
    check_hash_token($token, ['default-list']);
  }

  my $splitheader = 0;
  if (defined $cgi->param('resetit')) {
    @collist = DEFAULT_COLUMN_LIST;
  }
  else {
    if (defined $cgi->param("selected_columns")) {
      @collist = grep { exists $columns->{$_} } $cgi->param("selected_columns");
    }
    if (defined $cgi->param('splitheader')) {
      $splitheader = $cgi->param('splitheader') ? 1 : 0;
    }
  }
  my $list = join(" ", @collist);

  if ($list) {

    # Only set the cookie if this is not a saved search.
    # Saved searches have their own column list
    if (!$cgi->param('save_columns_for_search')) {
      $cgi->send_cookie(
        -name    => 'COLUMNLIST',
        -value   => $list,
        -expires => 'Fri, 01-Jan-2038 00:00:00 GMT'
      );
    }
  }
  else {
    $cgi->remove_cookie('COLUMNLIST');
  }
  if ($splitheader) {
    $cgi->send_cookie(
      -name    => 'SPLITHEADER',
      -value   => $splitheader,
      -expires => 'Fri, 01-Jan-2038 00:00:00 GMT'
    );
  }
  else {
    $cgi->remove_cookie('SPLITHEADER');
  }

  $vars->{'message'} = "change_columns";

  if ( $cgi->param('save_columns_for_search')
    && defined $search
    && $search->user->id == Bugzilla->user->id)
  {
    my $params = new Bugzilla::CGI($search->url);
    $params->param('columnlist', join(",", @collist));
    $search->set_url($params->query_string());
    $search->update();
  }

  my $params = new Bugzilla::CGI($cgi->param('rememberedquery'));
  $params->param('columnlist', join(",", @collist));
  $vars->{'redirect_url'} = "buglist.cgi?" . $params->query_string();

  # If we're running on Microsoft IIS, $cgi->redirect discards
  # the Set-Cookie lines. In mod_perl, $cgi->redirect with cookies
  # causes the page to be rendered as text/plain.
  # Workaround is to use the old-fashioned  redirection mechanism.
  # See bug 214466 and bug 376044 for details.
  print $cgi->redirect($vars->{'redirect_url'});
  exit;
}

if (defined $cgi->param('columnlist')) {
  @collist = split(/[ ,]+/, $cgi->param('columnlist'));
}
elsif (defined $cgi->cookie('COLUMNLIST')) {
  @collist = split(/ /, $cgi->cookie('COLUMNLIST'));
}
else {
  @collist = DEFAULT_COLUMN_LIST;
}

$vars->{'collist'} = \@collist;
$vars->{'splitheader'} = $cgi->cookie('SPLITHEADER') ? 1 : 0;

$vars->{'buffer'} = $cgi->query_string();

my $search;
if (defined $cgi->param('query_based_on')) {
  my $searches = Bugzilla->user->queries;
  my ($search) = grep($_->name eq $cgi->param('query_based_on'), @$searches);

  if ($search) {
    $vars->{'saved_search'} = $search;
  }
}

# Generate and return the UI (HTML page) from the appropriate template.
print $cgi->header();
$template->process("list/change-columns.html.tmpl", $vars)
  || ThrowTemplateError($template->error());