Add pwrstatd application (#14365)

* Add pwrstatd application

* Adding pwrstatd test json and correcting pwrstatd snmprec file.  Pwrstatd tests pass.

includes/html/pages/device/apps/pwrstatd.inc.php

@@ -0,0 +1,59 @@
+<?php
+
+$psu_list = Rrd::getRrdApplicationArrays($device, $app['app_id'], 'pwrstatd');
+
+print_optionbar_start();
+
+$link_array = [
+    'page'   => 'device',
+    'device' => $device['device_id'],
+    'tab'    => 'apps',
+    'app'    => 'pwrstatd',
+];
+
+$sn_list = [];
+
+foreach ($psu_list as $label) {
+    $sn = $label;
+
+    if ($vars['sn'] == $sn) {
+        $label = '<span class="pagemenu-selected">' . $label . '</span>';
+    }
+
+    array_push($sn_list, generate_link($label, $link_array, ['sn' => $sn]));
+}
+
+printf('%s | PSUs: %s', generate_link('All PSUs', $link_array), implode(', ', $sn_list));
+
+print_optionbar_end();
+
+$graphs = [
+    'pwrstatd_minutes'    => 'Battery Runtime Remaining',
+    'pwrstatd_percentage' => 'Percentage Readings',
+    'pwrstatd_voltage'    => 'Voltage Readings',
+    'pwrstatd_wattage'    => 'Power Readings',
+];
+
+foreach ($graphs as $key => $text) {
+    $graph_type = $key;
+    $graph_array['height'] = '100';
+    $graph_array['width'] = '215';
+    $graph_array['to'] = time();
+    $graph_array['id'] = $app['app_id'];
+    $graph_array['type'] = 'application_' . $key;
+
+    if (isset($vars['sn'])) {
+        $graph_array['sn'] = $vars['sn'];
+    }
+
+    echo '<div class="panel panel-default">
+    <div class="panel-heading">
+        <h3 class="panel-title">' . $text . '</h3>
+    </div>
+    <div class="panel-body">
+    <div class="row">';
+    include 'includes/html/print-graphrow.inc.php';
+    echo '</div>';
+    echo '</div>';
+    echo '</div>';
+}