#! /usr/bin/perl

# zeitungen-tidy - Daily Tidy run for www.zeitungsliste.de
# Copyright (c) 2008  Joey Schulze <joey@infodrom.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.

use strict;
use warnings;

use DBI;

my $dsn = 'dbi:Pg:dbname=zlist';

my $dbh = DBI->connect('dbi:Pg:dbname=zlist') or die "Can't connect to database\n";

sub tidy_online
{
    my $query = q{SELECT uid FROM online WHERE activity < now() - interval'48 hours'};

    my $sth = $dbh->prepare ($query) or die "Can't prepare Query: $DBI::errstr\n";
    my $rv = $sth->execute or die "Can't execute query: $DBI::errstr\n";

    my @uids = ();
    push @uids, $_->{uid} while ($_ = $sth->fetchrow_hashref);

    if ($#uids > -1) {
	$query = sprintf('DELETE FROM online WHERE uid in (%s)',
			 join(',', @uids));
	$dbh->do($query);
    }
}

sub tidy_activation
{
    my $query = q{SELECT uid,id FROM activation WHERE register_date < now() - interval'35 days'};

    my $sth = $dbh->prepare ($query) or die "Can't prepare Query: $DBI::errstr\n";
    my $rv = $sth->execute or die "Can't execute query: $DBI::errstr\n";

    my @uids = ();
    push @uids, $_->{uid} while ($_ = $sth->fetchrow_hashref);

    if ($#uids > -1) {
	$query = sprintf('DELETE FROM users WHERE id in (%s)',
			 join(',', @uids));
	$dbh->do($query);
    }
}

sub archive_topics
{
    my $query = q{SELECT id FROM topics WHERE archived IS false AND modified < now() - interval'2 weeks'};

    my $sth = $dbh->prepare ($query) or die "Can't prepare Query: $DBI::errstr\n";
    my $rv = $sth->execute or die "Can't execute query: $DBI::errstr\n";

    my @ids = ();
    push @ids, $_->{id} while ($_ = $sth->fetchrow_hashref);

    if ($#ids > -1) {
	$query = sprintf('UPDATE topics SET archived=true WHERE id in (%s)',
			 join(',', @ids));
	$dbh->do($query);
    }
}

sub tidy_tags
{
    my $query = q{SELECT id FROM tags WHERE id NOT IN (SELECT DISTINCT tag FROM zeitung_tags)};

    my $sth = $dbh->prepare ($query) or die "Can't prepare Query: $DBI::errstr\n";
    my $rv = $sth->execute or die "Can't execute query: $DBI::errstr\n";

    my @ids = ();
    push @ids, $_->{id} while ($_ = $sth->fetchrow_hashref);

    if ($#ids > -1) {
	$query = sprintf('DELETE FROM SET tags WHERE id in (%s)',
			 join(',', @ids));
	$dbh->do($query);
    }
}

tidy_online;
archive_topics;
# tidy_tags;
tidy_activation;