root/modules/branches/2.4/dashboard/page.index.php

<?php /* $Id: page.parking.php 2243 2006-08-12 17:13:17Z p_lindheimer $ */
//Copyright (C) 2006 Astrogen LLC 
//
//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.

$dashboard_debug = false;

$dispnum = 'sysinfo'; //used for switch on config.php
$action = isset($_REQUEST['action'])?$_REQUEST['action']:'';

$quietmode = isset($_REQUEST['quietmode'])?$_REQUEST['quietmode']:'';
$info = isset($_REQUEST['info'])?$_REQUEST['info']:false;

$title="freePBX: Sysinfo Info";
$message="System Info";

if (isset($_REQUEST['showall'])) {
    $_SESSION['syslog_showall'] = (bool)$_REQUEST['showall'];
}

//require_once('functions.inc.php');

define('BAR_WIDTH_LEFT', 400);
define('BAR_WIDTH_RIGHT', 200);

// AJAX update intervals (in seconds)
define('STATS_UPDATE_TIME', 6); // update interval for system uptime information
define('INFO_UPDATE_TIME', 30); // update interval for system uptime information

/** draw_graph
 *  draw a bar graph
 *
 *  $text         Title of text
 *  $real_units   Units to display
 *  $val          Value to graph
 *  $total        Total of graph
 *  $classes      CSS classes to use based on value percent
 *  $show_percent If results should be shown as percent
 *  $total_width  Width of graph
 */

function draw_graph($text, $real_units, $val, $total = 100, $classes = null, $show_percent = true, $total_width = 200) {
    if ($classes == null) {
        $classes = array(
            0=>'graphok',
            70=>'graphwarn',
            90=>'grapherror',
        );
    }

    $chars_per_pixel = 7;
    if (strlen($text) * $chars_per_pixel > $total_width - 35) {
        $text_trimmed = substr($text,0, floor(($total_width - 35) / $chars_per_pixel)).'..';
    } else {
        $text_trimmed = $text;
    }

    $clean_val = preg_replace("/[^0-9\.]*/","",$val);

    if ($total == 0) {
        $percent = ($clean_val == 0) ? 0 : 100;
    } else {
        $percent = round($clean_val/$total*100);
    }
    
    $graph_class = false;
    foreach ($classes as $limit=>$class) {
        if (!$graph_class) {
            $graph_class = $class;
        }
        if ($limit <= $percent) {
            $graph_class = $class;
        } else {
            break;
        }
    }
    $width = $total_width * ($percent/100);
    if ($width > $total_width) { 
        $width = $total_width;
    }
    
    $tooltip = $text.": ".$val.$real_units." / ".$total.$real_units." (".$percent."%)";
    $display_value = ($show_percent ? $percent."%" : $val.$real_units); 
    
    $out = "<div class=\"databox graphbox\" style=\"width:".$total_width."px;\" title=\"".$tooltip."\">\n";
    $out .= " <div class=\"bargraph ".$graph_class."\" style=\"width:".$width."px;\"></div>\n";
    $out .= " <div class=\"dataname\">".$text_trimmed."</div>\n";
    $out .= " <div class=\"datavalue\">".$display_value."</div>\n";
    $out .= "</div>\n";
    
    return $out;
}

function draw_status_box($text, $status, $tooltip = false, $total_width = 200) {
    switch ($status) {
        case "ok":
            $status_text = _("OK");
            $class = "graphok";
        break;
        case "warn":
            $status_text = _("Warn");
            $class = "graphwarn";
        break;
        case "error":
            $status_text = _("ERROR");
            $class = "grapherror";
        break;
        case "disabled":
            $status_text = "Disabled";
            $class = "";
        break;
    }
    if ($tooltip !== false) {
        $status_text = '<a href="#" title="'.$tooltip.'">'.$status_text.'</a>';
    }
    
    $out = "<div class=\"databox statusbox\" style=\"width:".$total_width."px;\">\n";
    $out .= " <div class=\"dataname\">".$text."</div>\n";
    $out .= " <div id=\"datavalue_".str_replace(" ","_",$text)."\" class=\"datavalue ".$class."\">".$status_text."</div>\n";
    $out .= "</div>\n";
    
    return $out;
}

function draw_box($text, $value, $total_width = 200) {
    $tooltip = $text.": ".$value;
    
    $out = "<div class=\"databox\" style=\"width:".$total_width."px;\">\n";
    $out .= " <div class=\"dataname\">".$text."</div>\n";
    $out .= " <div class=\"datavalue\"><a href=\"#\" title=\"".$tooltip."\">".$value."</a></div>\n";
    $out .= "</div>\n";
    
    return $out;
}

function time_string($seconds) {
    if ($seconds == 0) {
        return "0 "._("minutes");
    }

    $minutes = floor($seconds / 60);
    $seconds = $seconds % 60;

    $hours = floor($minutes / 60);
    $minutes = $minutes % 60;

    $days = floor($hours / 24);
    $hours = $hours % 24;
    
    $weeks = floor($days / 7);
    $days = $days % 7;
    
    $output = array();
    if ($weeks) { 
        $output[] = $weeks." ".($weeks == 1 ? _("week") : _("weeks"));
    }
    if ($days) { 
        $output[] = $days." ".($days == 1 ? _("days") : _("days"));
    }
    if ($hours) { 
        $output[] = $hours." ".($hours == 1 ? _("hour") : _("hours"));
    }
    if ($minutes) { 
        $output[] = $minutes." ".($minutes == 1 ? _("minute") : _("minutes"));
    }
    
    return implode(", ",$output);
}

function show_sysstats() {
    global $sysinfo;
    $out = '';
    
    $out .= "<h3>"._("System Statistics")."</h3>";
    $out .= "<h4>"._("Processor")."</h4>";
    $loadavg = $sysinfo->loadavg(true);
    $out .= draw_box(_("Load Average"), $loadavg['avg'][0]);
    $out .= draw_graph(_("CPU"), "", number_format($loadavg['cpupercent'],2), 100);
    
    $out .= "<h4>"._("Memory")."</h4>";
    $memory = $sysinfo->memory();
    $app_memory = isset($memory["ram"]["app"]) ? $memory["ram"]["app"] : $memory["ram"]["total"] - $memory["ram"]["t_free"];
    $out .= draw_graph(_("App Memory"), "MB", number_format($app_memory/1024,2), $memory["ram"]["total"]/1024);
    $out .= draw_graph(_("Swap"), "MB", number_format(($memory["swap"]["total"]-$memory["swap"]["free"])/1024,2), $memory["swap"]["total"]/1024);
    
    $out .= "<h4>"._("Disks")."</h4>";
    foreach ($sysinfo->filesystems() as $fs) {
        $out .= draw_graph($fs["mount"], "GB", number_format($fs["used"]/1024/1024, 2), $fs["size"]/1024/1024, strpos( $fs["options"],"ro" )!==false ? array(0=>"graphok"):null);
    }
    
    $out .= "<h4>"._("Networks")."</h4>";
    foreach ($sysinfo->network() as $net_name=>$net) {
        $net_name = trim($net_name);
        if ($net_name == 'lo' || $net_name == 'sit0') continue;
        
        $tx = new average_rate_calculator($_SESSION["netstats"][$net_name]["tx"], 10); // 30s max age
        $rx = new average_rate_calculator($_SESSION["netstats"][$net_name]["rx"], 10); // 30s max age
        
        $rx->add( $net["rx_bytes"] );
        $tx->add( $net["tx_bytes"] );
        
        $out .= draw_box($net_name." "._("receive"), number_format($rx->average()/1000,2)." KB/s");
        $out .= draw_box($net_name." "._("transmit"), number_format($tx->average()/1000,2)." KB/s");
    }
    return $out;
}

function show_aststats() {
    global $amp_conf;
    global $astinfo;
    $out = '';
    
    $channels = $astinfo->get_channel_totals();
    // figure out max_calls
    
    // guess at the max calls: number of users
    if (!isset($_SESSION["calculated_max_calls"])) {
        // set max calls to either MAXCALLS in amportal.conf, or the number of users in the system
        if (isset($amp_conf['MAXCALLS'])) {
            $_SESSION["calculated_max_calls"] = $amp_conf["MAXCALLS"];
        } else if (function_exists('core_users_list')) {
            $_SESSION["calculated_max_calls"] = count(core_users_list());
        } else {
            $_SESSION["calculated_max_calls"] = 1;
        }
    }
    // we currently see more calls than we guessed, increase it
    if ($channels['total_calls'] > $_SESSION["calculated_max_calls"]) {
        $_SESSION["calculated_max_calls"] = $channels['total_calls'];
    }
    $max_calls = $_SESSION["calculated_max_calls"];
    
    $classes = array(0=>'graphok');
    $max_chans = $max_calls * 2;
    
    $out .= "<h3>"._("FreePBX Statistics")."</h3>";
    $out .= draw_graph(_('Total active calls'), '', $channels['total_calls'], $max_calls, $classes , false, BAR_WIDTH_LEFT);
    $out .= draw_graph(_('Internal calls'), '', $channels['internal_calls'], $max_calls, $classes , false, BAR_WIDTH_LEFT);
    $out .= draw_graph(_('External calls'), '', $channels['external_calls'], $max_calls, $classes , false, BAR_WIDTH_LEFT);
    $out .= draw_graph(_('Total active channels'), '', $channels['total_channels'], $max_chans, $classes , false, BAR_WIDTH_LEFT);
    
    $out .= "<h4>"._("FreePBX Connections")."</h4>";
    
    if (function_exists('core_trunks_list')) {
        $trunks = core_trunks_list(true);
    } else {
        $trunks = false;
    }
    $conns = $astinfo->get_connections( $trunks );

    if ($conns['users_total'] > 0) {
        $out .= draw_graph(_('IP Phones Online'), '', $conns['users_online'], $conns['users_total'], $classes, false, BAR_WIDTH_LEFT);
    }
    if ($conns['trunks_total'] > 0) {
        $out .= draw_graph(_('IP Trunks Online'), '', $conns['trunks_online'], $conns['trunks_total'], $classes, false, BAR_WIDTH_LEFT);
    }
    if ($conns['registrations_total'] > 0) {
        $out .= draw_graph(_('IP Trunk Registrations'), '', $conns['registrations_online'], $conns['registrations_total'], $classes, false, BAR_WIDTH_LEFT);
    }

    return $out;
}

function show_sysinfo() {
    global $sysinfo;
    global $astinfo;
    $out = "<h3>"._("Uptime")."</h3></br>";
    $out .= '<table>';
    /*
    $out .= '<tr><th>Distro:</th><td>'.$sysinfo->distro().'</td></tr>';
    $out .= '<tr><th>Kernel:</th><td>'.$sysinfo->kernel().'</td></tr>';
    $cpu = $sysinfo->cpu_info();
    $out .= '<tr><th>CPU:</th><td>'.$cpu['model'].' '.$cpu['cpuspeed'].'</td></tr>';
    */
    
    $out .= '<tr><th>'._('System Uptime').':</th><td>'.time_string($sysinfo->uptime()).'</td></tr>';
    $ast_uptime = $astinfo->get_uptime();
    if (empty($ast_uptime['system'])) {
        $ast_uptime['system'] = time_string(0);
    }
    if (empty($ast_uptime['reload'])) {
        $ast_uptime['reload'] = time_string(0);
    }
    $out .= '<tr><th>'._('Asterisk Uptime').':</th><td>'.$ast_uptime['system'].'</td></tr>';
    $out .= '<tr><th>'._('Last Reload').':</th><td>'.$ast_uptime['reload'].'</td></tr>';
    
    $out .= '</table>';
    return $out;
}

function show_procinfo() {
    global $procinfo;
    global $astinfo;
    global $amp_conf;
    $out = '';
    
    $out .= "<h3>"._("Server Status")."</h3>";
    // asterisk
    if ($astver = $astinfo->check_asterisk()) {
        $out .= draw_status_box(_("Asterisk"), "ok", _('Asterisk is running: '.$astver));
    } else {
        $out .= draw_status_box(_("Asterisk"), "error", _('Asterisk is not running, this is a critical service!'));
    }
    
    // asterisk proxy (optionally)
    if (isset($amp_conf['ASTMANAGERPROXYPORT'])) {
        if ($procinfo->check_port($amp_conf['ASTMANAGERPROXYPORT'])) {
            $out .= draw_status_box(_("Manager Proxy"), "ok", _('Asterisk Manager Proxy is running'));
        } else {
            $out .= draw_status_box(_("Manager Proxy"), "warn", _('Asterisk Manager Proxy is not running, FreePBX will fall back to using Asterisk directly, which may result in poor performance'));
        }        
    }
    
    // fop
    if ($procinfo->check_fop_server()) {
        $out .= draw_status_box(_("Op Panel"), "ok", _('FOP Operator Panel Server is running'));
    } else {
        if (isset($amp_conf['FOPRUN']) && $amp_conf['FOPRUN']) {
            // it should be running
            $out .= draw_status_box(_("Op Panel"), "warn", _('FOP Operator Panel Server is not running, you will not be able to use the operator panel, but the system will run fine without it.'));
        } else {
            $out .= draw_status_box(_("Op Panel"), "disabled", _('FOP Operator Panel is disabled in amportal.conf'));
        }
    }
    
    // mysql
    if ($amp_conf['AMPDBENGINE'] == "mysql") {
        /* this is silly- it's always running, if the web interface loads
        if ($procinfo->check_mysql($amp_conf['AMPDBHOST'])) {
            $out .= draw_status_box(_("MySQL"), "ok", _('MySQL Server is running'));
        } else {
            $out .= draw_status_box(_("MySQL"), "error", _('MySQL Server is not running, this is a critical service for the web interface and call logs!'));
        }
        */
        $out .= draw_status_box(_("MySQL"), "ok", _('MySQL Server is running'));
    }
    
    // web always runs .. HOWEVER, we can turn it off with dhtml
    $out .= draw_status_box(_("Web Server"), "ok", _('Web Server is running'));
    
    // ssh    
    $ssh_port = (isset($amp_conf['SSHPORT']) && ctype_digit($amp_conf['SSHPORT']) && ($amp_conf['SSHPORT'] > 0) && ($amp_conf['SSHPORT'] < 65536))?$amp_conf['SSHPORT']:22;
    if ($procinfo->check_port($ssh_port)) {
        $out .= draw_status_box(_("SSH Server"), "ok", _('SSH Server is running'));
    } else {
        $out .= draw_status_box(_("SSH Server"), "warn", _('SSH Server is not running, you will not be able to connect to the system console remotely'));
    }
    return $out;
}

function show_syslog(&$md5_checksum) {
    global $db;
    $out = '';
    $checksum = '';

    // notify_classes are also used as the image names
    $notify_classes = array( 
        NOTIFICATION_TYPE_CRITICAL => 'notify_critical',
        NOTIFICATION_TYPE_SECURITY => 'notify_security',
        NOTIFICATION_TYPE_UPDATE => 'notify_update',
        NOTIFICATION_TYPE_ERROR => 'notify_error',
        NOTIFICATION_TYPE_WARNING => 'notify_warning',
        NOTIFICATION_TYPE_NOTICE => 'notify_notice',
    );
    $notify_descriptions = array(
        NOTIFICATION_TYPE_CRITICAL => _('Critical Error'),
        NOTIFICATION_TYPE_SECURITY => _('Security Update'),
        NOTIFICATION_TYPE_UPDATE => _('Update'),
        NOTIFICATION_TYPE_ERROR => _('Error'),
        NOTIFICATION_TYPE_WARNING => _('Warning'),
        NOTIFICATION_TYPE_NOTICE => _('Notice'),
    );
    
    $notify =& notifications::create($db);
    
    $showall = (isset($_SESSION['syslog_showall']) ? $_SESSION['syslog_showall'] : false);
    
    $items = $notify->list_all($showall);

    $out .= "<h3>"._("FreePBX Notices")."</h3>";
    
    if (count($items)) {
        $out .= '<ul>';
        foreach ($items as $item) {
            $checksum .= $item['module'].$item['id']; // checksum, so it is only updated on the page if this has changed
            
            $domid = "notify_item_".str_replace(' ','_',$item['module']).'_'.str_replace(' ','_',$item['id']);
            
            $out .= '<li id="'.$domid.'" ';
            if (isset($notify_classes[$item['level']])) {
                $out .= ' class="'.$notify_classes[$item['level']].'"';
            }
            $out .= '><div>';

            $out .= '<h4 class="syslog_text">';
            $out .= '<span><img src="images/'.$notify_classes[$item['level']].'.png" alt="'.$notify_descriptions[$item['level']].'" title="'.$notify_descriptions[$item['level']].'" width="16" height="16" border="0" />&nbsp;';
            $out .= $item['display_text'].'</span>';
            $out .= '<div class="notification_buttons">';
            if (isset($item['candelete']) && $item['candelete']) {
                $out .= '<a class="notify_ignore_btn" title="'._('Delete this').'" '.
                        'onclick="delete_notification(\''.$domid.'\', \''.$item['module'].'\', \''.$item['id'].'\');">'.
                        '<img src="images/cancel.png" width="16" height="16" border="0" alt="'._('Delete this').'" /></a>';
            }
            if (!$item['reset']) {
                $out .= '<a class="notify_ignore_btn" title="'._('Ignore this').'" '.
                        'onclick="hide_notification(\''.$domid.'\', \''.$item['module'].'\', \''.$item['id'].'\');">'.
                        '<img src="'.dirname($_SERVER['PHP_SELF']).'/images/notify_delete.png" width="16" height="16" border="0" alt="'._('Ignore this').'" /></a>';
            }
            $out .= '</div>';
            $out .= '</h4>';
            
            $out .= '<div class="syslog_detail">';
            $out .= nl2br($item['extended_text']);
            $out .= '<br/><span>'.sprintf('Added %s ago', time_string(time() - $item['timestamp'])).'<br/>'.
                    '('.$item['module'].'.'.$item['id'].')</span>';
            $out .= '</div>';
            
            $out .= '</div></li>';
        }
        $out .= '</ul>';
    } else {
        if ($showall) {
            $out .= _('No notifications');
        } else {
            $out .= _('No new notifications');
        }
    }
    
    $md5_checksum = md5($checksum);
    
    $out .= '<div id="syslog_button">';
    if ($showall) {
        $out .= '<a href="#" onclick="changeSyslog(0);">'._('show new').'</a>';
    } else {
        $out .= '<a href="#" onclick="changeSyslog(1);">'._('show all').'</a>';
    }
    $out .= '</div>';
    return $out;
}

function do_syslog_ack() {    
    global $db;
    $notify =& notifications::create($db);
    
    if (isset($_REQUEST['module']) && $_REQUEST['id']) {
        $notify->reset($_REQUEST['module'], $_REQUEST['id']);
    }
}
function do_syslog_delete() {    
    global $db;
    $notify =& notifications::create($db);
    
    if (isset($_REQUEST['module']) && $_REQUEST['id']) {
    var_dump($_REQUEST);
        $notify->safe_delete($_REQUEST['module'], $_REQUEST['id']);
    }
}

/********************************************************************************************/


define("IN_PHPSYSINFO", "1");
define("APP_ROOT", dirname(__FILE__).'/phpsysinfo');
include APP_ROOT."/common_functions.php";
include APP_ROOT."/class.".PHP_OS.".inc.php";
include_once "common/json.inc.php";
include dirname(__FILE__)."/class.astinfo.php";
include dirname(__FILE__)."/class.average_rate_calculator.php";
include dirname(__FILE__)."/class.procinfo.php";
include dirname(__FILE__)."/class.error.inc.php";

$error = new Error;


$sysinfo = new sysinfo;
$astinfo = new astinfo($astman);
$procinfo = new procinfo;


if (!$quietmode) {
    ?>
    
    <script language="javascript">
    $(document).ready(function(){
        $.ajaxTimeout( 20000 );
        scheduleInfoUpdate();
        scheduleStatsUpdate();
        
        makeSyslogClickable();
    });
    
    function makeSyslogClickable() {
        $('#syslog h4 span').click(function() {
            $(this).parent().next('div').slideToggle('fast');
        });
    }
    
    var syslog_md5;
    var webserver_fail = 0;
    var info_timer = null;
    var stats_timer = null;

    function updateFailed(reqObj, status) {
        // stop updating 
        clearTimeout(stats_timer);
        stats_timer = null;
        clearTimeout(info_timer);
        info_timer = null;

        webserver_fail += 1;
        webobj = $('#datavalue_Web_Server')

        if (webserver_fail == 1) {
            webobj.text("Timeout");
            webobj.removeClass("graphok");
            webobj.addClass("graphwarn");    
        } else {
            webobj.text("ERROR");
            webobj.removeClass("graphok");
            webobj.removeClass("graphwarn");
            webobj.addClass("grapherror");
        }
        scheduleInfoUpdate();
    }


    function updateInfo() {
        $.ajax({
            type: 'GET',
            url: "<?php echo $_SERVER["PHP_SELF"]; ?>?type=tool&display=<?php echo $module_page; ?>&quietmode=1&info=info", 
            dataType: 'json',
            success: function(data) {
                $('#procinfo').html(data.procinfo);
                $('#sysinfo').html(data.sysinfo);
                // only update syslog div if the md5 has changed
                if (syslog_md5 != data.syslog_md5) {
                    $('#syslog').html(data.syslog);
                    makeSyslogClickable();
                    syslog_md5 = data.syslog_md5;
                }

                // webserver is ok
                webserver_fail = 0;

                scheduleInfoUpdate();
                if (stats_timer == null) {
                    // restart stats updates
                    scheduleStatsUpdate();
                }
            },
            error: updateFailed
        });
    }
    function scheduleInfoUpdate() {
        info_timer = setTimeout('updateInfo();',<?php echo INFO_UPDATE_TIME; ?>000);
    }
    
    
    function updateStats() {
        $.ajax({
            type: 'GET',
            url: "<?php echo $_SERVER["PHP_SELF"]; ?>?type=tool&display=<?php echo $module_page; ?>&quietmode=1&info=stats", 
            dataType: 'json',
            success: function(data) {
                $('#sysstats').html(data.sysstats);
                $('#aststats').html(data.aststats);
                scheduleStatsUpdate();
            },
            error: updateFailed
        });
    }
    function scheduleStatsUpdate() {
        stats_timer = setTimeout('updateStats();',<?php echo STATS_UPDATE_TIME; ?>000);
    }
    
    
    function changeSyslog(showall) {
        $('#syslog_button').text('<?php echo _('loading...'); ?>');
        $('#syslog').load("<?php echo $_SERVER["PHP_SELF"]; ?>?type=tool&display=<?php echo $module_page; ?>&quietmode=1&info=syslog&showall="+showall,{}, function() {
            makeSyslogClickable();
        });
    }

    function hide_notification(domid, module, id) {
        $('#'+domid).fadeOut('slow');
        $.post('config.php', {display:'<?php echo $module_page; ?>', quietmode:1, info:'syslog_ack', module:module, id:id});
    }
    function delete_notification(domid, module, id) {
        $('#'+domid).fadeOut('slow');
        $.post('config.php', {display:'<?php echo $module_page; ?>', quietmode:1, info:'syslog_delete', module:module, id:id});
    }
    </script>

    <h2>FreePBX System Status</h2>
    </div>
    <div id="dashboard">
    <?php
    echo '<div id="sysinfo-left">';
    
    // regular page
    echo '<div id="syslog" class="infobox">';
    echo show_syslog($syslog_md5);
    // syslog_md5 is used by javascript updateInfo() to determine if the syslog div contents have changed
    echo '<script type="text/javascript"> syslog_md5 = "'.$syslog_md5.'"; </script>';
    //echo "log goes here<br/><br/><br/>";
    echo '</div>';
    
    echo '<div id="aststats" class="infobox">';
    echo show_aststats();
    echo '</div>';
    
    
    echo '<div id="sysinfo" class="infobox">';
    echo show_sysinfo();
    echo '</div>';
    
    
    
    echo '</div><div id="sysinfo-right">';
    
    
    
    echo '<div id="sysstats" class="infobox">';
    echo show_sysstats();
    echo '</div>';
    
    echo '<div id="procinfo" class="infobox">';
    echo show_procinfo();
    echo '</div>';
    
    echo '<div style="clear:both;"></div>';
    
    echo '</div></div>'; // #sysinfo, #sysinfo-right
    
    echo '<div class="content">';

    if($dashboard_debug && $error->ErrorsExist()) {
        $fh = fopen($amp_conf['ASTLOGDIR']."/dashboard-error.log","a");
        fwrite($fh, $error->ErrorsAsText());
        fclose($fh);
    }           

} else {
    // Handle AJAX updates
    
    switch ($info) {
        case "sysstats":
            echo show_sysstats();
        break;
        case "aststats":
            echo show_aststats();
        break;
        case "procinfo":
            echo show_procinfo();
        break;
        case 'sysinfo':
            echo show_sysinfo();
        break;
        case 'syslog':
            echo show_syslog($syslog_md5);    
            // syslog_md5 is used by javascript updateInfo() to determine if the syslog div contents have changed
            echo '<script type="text/javascript"> syslog_md5 = "'.$syslog_md5.'"; </script>';
        break;
        case 'syslog_ack':
            do_syslog_ack();
        break;
        case 'syslog_delete':
            do_syslog_delete();
        break;
        
        case 'info':
            $json = new Services_JSON();
            echo $json->encode(
                array(
                    'procinfo'=>show_procinfo(),
                    'sysinfo'=>show_sysinfo(),
                    'syslog'=>show_syslog($syslog_md5),
                    'syslog_md5'=>$syslog_md5,
                )
            );
        break;
        case 'stats':
            $json = new Services_JSON();
            echo $json->encode(
                array(
                    'sysstats'=>show_sysstats(),
                    'aststats'=>show_aststats(),
                )
            );
        break;
        case 'all':
            $json = new Services_JSON();
            echo $json->encode(
                array(
                    'sysstats'=>show_sysstats(),
                    'aststats'=>show_aststats(),
                    'procinfo'=>show_procinfo(),
                    'sysinfo'=>show_sysinfo(),
                    'syslog'=>show_syslog(),
                )
            );
        break;
    }
}

?>