<?php

// MYSQL Check - FIXME
// 1 UNKNOWN

/*
 * Observium Network Management and Monitoring System
 * Copyright (C) 2006-2012, Observium Developers - http://www.observium.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 3 of the License, or
 * (at your option) any later version.
 *
 * See COPYING for more details.
 */

if (!isset($debug)) {
    // Not called from within discovery, let's load up the necessary stuff.
    include 'includes/defaults.inc.php';
    include 'config.php';
    include 'includes/definitions.inc.php';
    include 'includes/functions.php';

    $options = getopt('d');
    if (isset($options['d'])) {
        $debug = true;
    }
    else {
        $debug = false;
    }
}

$insert = 0;

if ($db_rev = @dbFetchCell('SELECT version FROM `dbSchema` ORDER BY version DESC LIMIT 1')) {
}
else {
    $db_rev = 0;
    $insert = 1;
}

// For transition from old system
if ($old_rev = @dbFetchCell('SELECT revision FROM `dbSchema`')) {
    echo "-- Transitioning from old revision-based schema to database version system\n";
    $db_rev = 6;

    if ($old_rev <= 1000) {
        $db_rev = 1;
    }

    if ($old_rev <= 1435) {
        $db_rev = 2;
    }

    if ($old_rev <= 2245) {
        $db_rev = 3;
    }

    if ($old_rev <= 2804) {
        $db_rev = 4;
    }

    if ($old_rev <= 2827) {
        $db_rev = 5;
    }

    $insert = 1;
}//end if

$updating = 0;

$include_dir_regexp = '/\.sql$/';

if ($handle = opendir($config['install_dir'].'/sql-schema')) {
    while (false !== ($file = readdir($handle))) {
        if (filetype($config['install_dir'].'/sql-schema/'.$file) == 'file' && preg_match($include_dir_regexp, $file)) {
            $filelist[] = $file;
        }
    }

    closedir($handle);
}

asort($filelist);

if (explode('.', max($filelist), 2)[0] <= $db_rev) {
    if ($debug) {
        echo "DB Schema already up to date.\n";
    }
    exit(0);
}

if (!dbGetLock('schema_update')) {
    echo "Schema update already in progress. Exiting\n";
    exit(1);
} //end if

do {
    sleep(1);
} while (@dbFetchCell('SELECT COUNT(*) FROM `devices` WHERE NOT IS_FREE_LOCK(CONCAT("polling.", device_id)) OR NOT IS_FREE_LOCK(CONCAT("queued.", device_id)) OR NOT IS_FREE_LOCK(CONCAT("discovering.", device_id))') > 0);

foreach ($filelist as $file) {
    list($filename,$extension) = explode('.', $file, 2);
    if ($filename > $db_rev) {
        if (!$updating) {
            echo "-- Updating database schema\n";
        }

        echo sprintf('%03d', $db_rev).' -> '.sprintf('%03d', $filename).' ...';

        $err = 0;

        if ($fd = @fopen($config['install_dir'].'/sql-schema/'.$file, 'r')) {
            $data = fread($fd, 4096);
            while (!feof($fd)) {
                $data .= fread($fd, 4096);
            }

            foreach (explode("\n", $data) as $line) {
                if (trim($line)) {
                    d_echo("$line \n");

                    if ($line[0] != '#') {
                        if ($config['db']['extension'] == 'mysqli') {
                            $update = mysqli_query($database_link, $line);
                        }
                        else {
                            $update = mysql_query($line);
                        }
                        if (!$update) {
                            $err++;
                            if ($debug) {
                                if ($config['db']['extension'] == 'mysqli') {
                                    echo mysqli_error($database_link)."\n";
                                }
                                else {                           
                                    echo mysql_error()."\n";
                                }
                            }
                        }
                    }
                }
            }

            if ($db_rev < 5) {
                echo " done.\n";
            }
            else {
                echo " done ($err errors).\n";
            }
        }
        else {
            echo " Could not open file!\n";
        }//end if

        $updating++;
        $db_rev = $filename;
    }//end if
}//end foreach

if ($updating) {
    if ($insert) {
        dbInsert(array('version' => $db_rev), 'dbSchema');
    }
    else {
        dbUpdate(array('version' => $db_rev), 'dbSchema');
    }

    echo "-- Done\n";
}