package UsageStats;

# Copyright 2000-2003 Katipo Communications

# Copyright 2010 BibLibre

# Parts Copyright 2010 Catalyst IT

#

# This file is part of Koha.

#

# Koha 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.

#

# Koha 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 Koha; if not, write to the Free Software Foundation, Inc.,

# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

use strict;

use C4::Context;

use POSIX qw(strftime);

use LWP::UserAgent;

use JSON;

sub NeedUpdate {

    my $lastupdated = C4::Context->preference('UsageStatsLastUpdateTime') || 0;

    my $now = strftime("%s", localtime);

    # Need to launch cron.

    return 1 if $now - $lastupdated >= 2592000;

    # Cron no need to be launched.

    return 0;

}

sub LaunchCron {

    if (!C4::Context->preference('UsageStatsShare')) {

      die ("UsageStats is not configured");

    }

    if (NeedUpdate) {

        C4::Context->set_preference('UsageStatsLastUpdateTime', strftime("%s", localtime));

        my $data = BuildReport();

        ReportToComunity($data);

    }

}

sub BuildReport {

    my $report = {

        'library' => {

            'name' => C4::Context->preference('UsageStatsLibraryName'),

            'id' => C4::Context->preference('UsageStatsID') || 0,

        },

    };

    # Get database volumetry.

    foreach (qw/biblio auth_header old_issues old_reserves borrowers aqorders subscription/) {

        $report->{volumetry}{$_} = _count($_);

    }

    # Get systempreferences.

    foreach (qw/IntranetBiblioDefaultView marcflavour/) {

        $report->{systempreferences}{$_} = C4::Context->preference($_);

    }

    return $report;

}

sub ReportToComunity {

    my $data = shift;

    my $json = to_json($data);

    my $url = C4::Context->config('mebaseurl');

    my $ua = LWP::UserAgent->new;

    my $req = HTTP::Request->new(POST => "$url/upload.pl");

    $req->content_type('application/x-www-form-urlencoded');

    $req->content("data=$json");

    my $res = $ua->request($req);

    my $content = from_json($res->decoded_content);

    C4::Context->set_preference('UsageStatsID', $content->{library}{library_id});

}

sub _count {

    my $table = shift;

    my $dbh = C4::Context->dbh;

    my $sth = $dbh->prepare("SELECT count(*) from $table");

    $sth->execute;

    return $sth->fetchrow_array;

}

&LaunchCron;

1;