aredn/files/www/cgi-bin/signal

#!/usr/bin/perl
=for commnet

  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
  Copyright (C) 2015 Darryl Quinn
   See Contributors file for additional contributors

  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 version 3 of the License.

  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, see <http://www.gnu.org/licenses/>.

  Additional Terms:

  Additional use restrictions exist on the AREDN(TM) trademark and logo.
    See AREDNLicense.txt for more info.

  Attributions to the AREDN Project must be retained in the source code.
  If importing this code into a new or existing project attribution
  to the AREDN project must be added to the source code.

  You must not misrepresent the origin of the material conained within.

  Modified versions must be modified to attribute to the original source
  and be marked in reasonable ways as differentiate it from the original
  version.
=cut

$debug = 0;

BEGIN {push @INC, '/www/cgi-bin'};
use perlfunc;

chomp ($tzone=`date +%Z`);
read_query_string();

# collect some variables
$node = nvram_get("node");
$node = "NOCALL" unless $node;

if($parms{"realtime"} )
{
  $dmode="Realtime";
} else {
  $dmode="Archived";
}

http_header();
html_header("$node $dmode signal strength", 0);

$header = <<EOF;
  <script src="/js/jquery-2.1.4.min.js"></script>
  <script src="/js/jquery.canvasjs.min.js"></script>
  <script type="text/javascript">
    var dps=[[{"label":"Init","y":-95}],[{"label":"Init","y":-95}]];
      
    // Read a page's GET URL variables and return them as an associative array.
    function getUrlVars()
    {
        var vars = [], hash;
        var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
        for(var i = 0; i < hashes.length; i++)
        {
            hash = hashes[i].split('=');
            vars.push(hash[0]);
            vars[hash[0]] = hash[1];
        }
        return vars;
    }

    \$(document).ready(function () {
      var MAXPOINTS=10;
      var chart = new CanvasJS.Chart("chartContainer", {
        zoomEnabled: true,
        zoomType: "xy",
        exportEnabled: true,
        backgroundColor: "#E7E7E7",
        title: {
          text: "$dmode Signal to Noise"
        },
        legend: {
          horizontalAlign: "right", // left, center ,right 
          verticalAlign: "center",  // top, center, bottom
        },
        axisX: { 
           title: "Time (in $tzone)",
           labelFontSize: 10,
           labelAngle: -45,
        },
        axisY: {
          title: "dBm",
          interlacedColor: "#F0F8FF",
        },
        data: [
          {
            type: "spline",
            showInLegend: true, 
            legendText: "Signal",
            toolTipContent: "Signal: {y}dBm @ {label}",
            dataPoints: dps[0]
          },{
            type: "line",
            showInLegend: true, 
            legendText: "Noise",
            toolTipContent: "Noise: {y}dBm @ {label}",
            dataPoints: dps[1]
          }
        ],
      }); // --- chart

      var updateArchiveChart = function () {
        \$.getJSON("/cgi-bin/signal.json?device=$parms{device}", function (result) {
          chart.options.data[0].dataPoints = result[0];
          chart.options.data[1].dataPoints = result[1];
          chart.render();
        });
      };  

      var updateRealtimeChart = function () {
        \$.getJSON("/cgi-bin/signal.json?realtime=1&device=$parms{device}", function (result) {
          dps[0].push(result[0][0]);
          dps[1].push(result[1][0]);
          chart.render();
        });
      };  

      var dmode = getUrlVars()["realtime"];

      if(dmode) {
        updateRealtimeChart();
        setInterval(function() {updateRealtimeChart()}, 1000);
      } else {
        updateArchiveChart();
        setInterval(function() {updateArchiveChart()}, 60000);
      }
      chart.render();
    }); // --- document.ready
  </script>
  </head>
EOF

$page = <<EOF;
<body>
  <center>
    <div class="TopBanner">
      <div class="LogoDiv"><img src="/AREDN.png" class="AREDNLogo"></img></div>
    </div>
    <h1><big>$node</big></h1><hr>
    <nobr>
    <button onclick="window.location.href='/cgi-bin/signal'">Archive</button>
    <button onclick="window.location.href='/cgi-bin/signal?realtime=1'">Realtime</button>
    <button onclick="window.location.href='/cgi-bin/status'">Quit</button>
    <br />
    <div id="deviceSelector">
    <form name="deviceSelector" method="GET" action="/cgi-bin/signal">
    Selected Device:&nbsp;<select name="device" onChange="this.form.submit();">
EOF

# get a list of files from /tmp/snrlog
my @files = `ls -1A /tmp/snrlog`;
$parms{device}="" if(!/$parms{device}/ ~~ @files);

# default to "Strongest Signal" for Realtime
if(! $parms{device} and $parms{realtime}) {
  $page = $page . "<option selected value='strongest'>Strongest Signal</option>";
} 

$firstSel=1;
# iterate over each file
foreach $logfile (@files)
{
  chomp($logfile);
  my ($dmac, $dname) = $logfile =~ /^(.*?)\-(.*)/;
  $dname=$dmac if($dname eq '');
  if($parms{device} eq $logfile or (!$parms{realtime} and $firstSel)) {
    $page = $page . "<option selected value='$logfile'>$dname</option>\n";
    $firstSel=0;
  } else {
    $page = $page . "<option value='$logfile'>$dname</option>\n";
  }
}

$page = $page . "</select>\n";
$page = $page . "<input type='hidden' name='realtime' value='1'></input>\n" if($parms{realtime} eq "1");
$page = $page . <<EOF;    
    </form>
    </div>
    <div id="chartContainer" style="width: 800px; height: 380px;"></div>
  </center>
EOF

print $header;
print $page;
show_debug_info();
print "</body></html>";

sub DEBUGEXIT()
{
    my ($text) = @_;
    http_header();
    html_header("$node setup", 1);
    print "DEBUG-";
    print $text;
    print "</body>";
    exit;
}