#!/usr/bin/perl -w
# 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 strict;
use warnings;
use lib qw(. lib);

use Bugzilla;
use Bugzilla::Config qw(:admin);
use Bugzilla::Search::Saved;
use Bugzilla::Status;
use Getopt::Long;

my $confirmed   = new Bugzilla::Status({ name => 'CONFIRMED' });
my $in_progress = new Bugzilla::Status({ name => 'IN_PROGRESS' });

if ($confirmed and $in_progress) {
    print "You are already using the new workflow.\n";
    exit 1;
}
my $enable_unconfirmed  = 0;
my $result = GetOptions("enable-unconfirmed" => \$enable_unconfirmed);

print <<END;
WARNING: This will convert the status of all bugs using the following
system:

  "NEW" will become "CONFIRMED"
  "ASSIGNED" will become "IN_PROGRESS"
  "REOPENED" will become "CONFIRMED" (and the "REOPENED" status will be removed)
  "CLOSED" will become "VERIFIED" (and the "CLOSED" status will be removed)

This change will be immediate. The history of each bug will also be changed
so that it appears that these statuses were always in existence.

Emails will not be sent for the change.

END
if ($enable_unconfirmed) {
    print "UNCONFIRMED will be enabled in all products.\n";
} else {
    print <<END;
If you also want to enable the UNCONFIRMED status in every product,
restart this script with the --enable-unconfirmed option.
END
}
print "\nTo continue, press any key, or press Ctrl-C to stop this program...";
getc;

my $dbh = Bugzilla->dbh;
# This is an array instead of a hash so that we can be sure that
# the translation happens in the right order. In particular, we
# want NEW to be renamed to CONFIRMED, instead of having REOPENED
# be the one that gets renamed.
my @translation = (
    [NEW      => 'CONFIRMED'],
    [ASSIGNED => 'IN_PROGRESS'],
    [REOPENED => 'CONFIRMED'],
    [CLOSED   => 'VERIFIED'],
);

my $status_field = Bugzilla::Field->check('bug_status');
$dbh->bz_start_transaction();
foreach my $pair (@translation) {
    my ($from, $to) = @$pair;
    print "Converting $from to $to...\n";
    $dbh->do('UPDATE bugs SET bug_status = ? WHERE bug_status = ?',
             undef, $to, $from);

    if (Bugzilla->params->{'duplicate_or_move_bug_status'} eq $from) {
        SetParam('duplicate_or_move_bug_status', $to);
        write_params();
    }

    foreach my $what (qw(added removed)) {
        $dbh->do("UPDATE bugs_activity SET $what = ?
                   WHERE fieldid = ? AND $what = ?",
                 undef, $to, $status_field->id, $from);
    }

    # Delete any transitions where it now appears that
    # a bug moved from a status to itself.
    $dbh->do('DELETE FROM bugs_activity WHERE fieldid = ? AND added = removed',
             undef, $status_field->id);

    # If the new status already exists, just delete the old one, but retain
    # the workflow items from it.
    if (my $existing = new Bugzilla::Status({ name => $to })) {
        $dbh->do('DELETE FROM bug_status WHERE value = ?', undef, $from);
    }
    # Otherwise, rename the old status to the new one.
    else {
        $dbh->do('UPDATE bug_status SET value = ? WHERE value = ?',
                 undef, $to, $from);
    }

    Bugzilla::Search::Saved->rename_field_value('bug_status', $from, $to);
    Bugzilla::Series->Bugzilla::Search::Saved::rename_field_value('bug_status',
        $from, $to);
}
if ($enable_unconfirmed) {
    print "Enabling UNCONFIRMED in all products...\n";
    $dbh->do('UPDATE products SET allows_unconfirmed = 1');
}
$dbh->bz_commit_transaction();

print <<END;
Done. There are some things you may want to fix, now:

  * You may want to run ./collectstats.pl --regenerate to regenerate
    data for the Old Charts system. 
  * You may have to fix the Status Workflow using the Status Workflow
    panel in "Administration".
  * You will probably want to update the "mybugstemplate" and "defaultquery"
    parameters using the Parameters panel in "Administration". (Just
    resetting them to the default will work.)
END