Willamette Valley Mesh - Git Server
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custom charts added

gandolf authored on 01/17/2020 00:21:04
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arednsig/html/arednsig.php
History View file @ 6547d1a
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+<html>
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+<!-- Courtsey ruler
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+12345678901234567890123456789012345678901234567890123456789012345678901234567890
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+-->
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+<head>
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+<style>
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+p {
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+    font: 14px ariel, sans serif;
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+}
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+#errorMsg {
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+    font:bold 18px arial,sans-serif;
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+    color:red;
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+    text-align:center;
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+}
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+.chartContainer {
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+    padding: 2px;
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+}
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+img.chart {
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+    width:100%;
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+}
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+</style>
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+</head>
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+<body>
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+
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+<?php
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+/*
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+ done - Convert dates to  epoch time
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+ done - Rrdtool - get first in time and last in time
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+ From above validate begin and end dates
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+ Rrdtool - create charts of time period
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+
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+ use $output = shell_exec($cmd); to execute rrdtool commands
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+
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+*/
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+# round robin database file
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+$_RRD_FILE = "/home/pi/database/arednsigData.rrd";
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+# charts html directory
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+$_GRAPH_DIRECTORY = "/home/pi/public_html/arednsig/dynamic/";
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+# standard chart width in pixels
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+$_GRAPH_WIDTH = 600;
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+# standard chart height in pixels
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+$_GRAPH_HEIGHT = 150;
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+# debug mode
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+$_DEBUG = false;
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+
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+error_reporting(E_ALL);
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+
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+# Get user supplied chart begin and end dates.
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+
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+$beginDate = $_POST["beginDate"];
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+$endDate =  $_POST["endDate"];
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+
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+$cmd = sprintf("rrdtool first %s --rraindex 1",$_RRD_FILE);
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+$firstDP = shell_exec($cmd);
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+
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+$cmd = sprintf("rrdtool last %s", $_RRD_FILE);
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+$lastDP = shell_exec($cmd);
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+
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+$beginDateEp = strtotime($beginDate);
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+$endDateEp = strtotime($endDate);
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+
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+# data entry validation and error checking
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+
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+if ($beginDateEp > $endDateEp) {
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+    echo "<p id=\"errorMsg\">" .
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+         "End date must be after begin date.</p>";
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+} elseif ($beginDateEp < $firstDP || $endDateEp > $lastDP) {
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+    echo "<p id=\"errorMsg\">" .
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+          "Date range must be between " .
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+          date('m / d / Y', $firstDP) . " and " .
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+          date('m / d / Y', $lastDP) . ".</p>";
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+} else {
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+    createChart('custom_signal', 'S', 'dBm',
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+                'RSSI', $beginDateEp, $endDateEp,
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+                 0, 0, 2, false);
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+    createChart('custom_snr', 'SNR', 'dBm',
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+                'S/N', $beginDateEp, $endDateEp,
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+                 0, 0, 2, false);
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+    if ($_DEBUG) {
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+        echo "<p>Date range: " . $beginDateEp . " thru " .
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+              $endDateEp . "</p>";
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+    }
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+
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+    echo "<div class=\"chartContainer\">" .
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+         "<img class=\"chart\" src=\"dynamic/custom_signal.png\">" .
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+         "</div>";
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+    echo "<div class=\"chartContainer\">" .
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+         "<img class=\"chart\" src=\"dynamic/custom_snr.png\">" .
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+         "</div>";
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+}
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+
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+function createChart($chartFile, $dataItem, $label, $title, $begin,
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+                     $end, $lower, $upper, $addTrend, $autoScale) {
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+    /*
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+    Uses rrdtool to create a chart of specified aredn node data item.
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+    Parameters:
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+       fileName - name of the created chart file
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+       dataItem - data item to be charted
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+       label - string containing a label for the item to be charted
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+       title - string containing a title for the chart
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+       begin - beginning time of the chart data
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+       end   - ending time of the data to be charted
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+       lower - lower bound for chart ordinate #NOT USED
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+       upper - upper bound for chart ordinate #NOT USED
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+       addTrend - 0, show only chart data
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+                  1, show only a trend line
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+                  2, show a trend line and the chart data
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+       autoScale - if True, then use vertical axis auto scaling
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+           (lower and upper parameters are ignored), otherwise use
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+           lower and upper parameters to set vertical axis scale
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+    Returns: True if successful, False otherwise
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+    */
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+    global $_DEBUG, $_GRAPH_DIRECTORY, $_GRAPH_WIDTH,
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+           $_GRAPH_HEIGHT, $_RRD_FILE;
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+
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+    $chartPath = $_GRAPH_DIRECTORY . $chartFile . ".png";
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+
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+    # Format the rrdtool chart command.
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+
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+    # Set chart start time, height, and width.
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+    $cmdfmt = "rrdtool graph %s -a PNG -s %s -e %s -w %s -h %s ";
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+    $cmd = sprintf($cmdfmt, $chartPath, $begin, $end, $_GRAPH_WIDTH,
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+                   $_GRAPH_HEIGHT);
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+    $cmdfmt = "-l %s -u %s -r ";
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+    if ($lower < $upper) {
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+        $cmd .= sprintf($cmdfmt, $lower, $upper);
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+    } elseif ($autoScale) {
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+        $cmd .= "-A ";
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+    }
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+    $cmd .= "-Y ";
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+
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+    # Set the chart ordinate label and chart title.
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+    $cmdfmt = "-v %s -t %s ";
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+    $cmd .= sprintf($cmdfmt, $label, $title);
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+
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+    # Show the data, or a moving average trend line over
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+    # the data, or both.
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+    $trendWindow = floor(($end - $begin) / 12);
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+
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+    $cmdfmt = "DEF:dSeries=%s:%s:LAST ";
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+    $cmd .= sprintf($cmdfmt, $_RRD_FILE, $dataItem);
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+
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+    if ($addTrend == 0) {
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+        $cmd .= "LINE1:dSeries#0400ff ";
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+    } elseif ($addTrend == 1) {
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+        $cmdfmt = "CDEF:smoothed=dSeries,%s,TREND LINE3:smoothed#ff0000 ";
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+        $cmd .= sprintf($cmdfmt, $trendWindow);
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+    } elseif ($addTrend == 2) {
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+        $cmd .= "LINE1:dSeries#0400ff ";
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+        $cmdfmt = "CDEF:smoothed=dSeries,%s,TREND LINE3:smoothed#ff0000 ";
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+        $cmd .=  sprintf($cmdfmt, $trendWindow);
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+    }
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+
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+    if ($_DEBUG) {
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+        echo "<p>chart command:<br>" . $cmd . "</p>";
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+    }
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+
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+    $result = shell_exec($cmd . "2>&1");
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+    if ($_DEBUG == true) {
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+        echo "<p>result:<br>" . $result . "</p>";
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+    }
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+}
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+
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+?>
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+
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+</body>
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+</html>