adding few test plugins and plugin system

plugins/ping/config.json

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+{
+    "host": "localhost"
+}

plugins/ping/package.json

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+{
+    "name": "ping-plugin",
+    "version": "1.0.0",
+    "private": true,
+    "dependencies": {
+
+    }
+}

plugins/ping/plugin.js

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+let plugin = require("../../modules/plugin.js").default;
+let config = require(__dirname + "/config.json");
+var sys = require('util');
+var exec = require('child_process').exec;
+
+class myTestPlugin extends plugin {
+
+    onInit() {
+
+    }
+
+    onAdminRouter(router) {
+        /* let self = this;
+         router.get("/test", function (req, res, next) {
+              res.send(self.renderPluginView("test", { test: "hello!" }));
+         }); */
+    }
+
+    onPluginRouter(router) {
+        router.get("/ajax/ping", function (req, res) {
+            let cmd = "ping -c 1 ";
+            let regex = /=([0-9.]+?) ms/;
+            if (/^win/.test(process.platform)) {
+                cmd = "ping -n 1 ";
+                regex = /[><=]([0-9.]+?)ms/;
+            }
+            exec(cmd + config.host, function (err, stdout, stdErr) {
+                var ms = stdout.match(regex);
+                ms = (ms && ms[1]) ? Number(ms[1]) : ms;
+                res.json({ ping: ms });
+            });
+        })
+    }
+
+    setDisplayViewAdditions() {
+        return this.renderPluginView("pingWidget");
+    }
+
+}
+
+exports.default = myTestPlugin;

plugins/ping/public/test.txt

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+testing.123

plugins/ping/views/pingWidget.twig

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+<style>
+	#bandwidth {
+		position: absolute;
+		z-index: 10;
+		right: 0;
+		width: 15vw;
+		height: 100px;
+		background: whitesmoke;
+		border: 2px black solid;
+		padding: 0.5rem 1rem;
+		text-align: center;
+	}
+</style>
+<div id="bandwidth" class="gpu">
+	<h1 style="margin: 0;padding: 0;">Ping Status</h1>
+	<h2 id="testStatus" style="margin: 0;padding: 0;"></h2>
+</div>
+
+<script>
+
+	ping();
+	setInterval(() => {
+		ping()
+	}, 5000);
+
+	function ping() {
+		$.getJSON("/ajax/ping", function (data) {
+			$('#testStatus').html(data.ping + "ms");
+		});
+	}
+</script>

plugins/profiler/plugin.js

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+let plugin = require("../../modules/plugin.js").default;
+let cli = require('../../modules/cli.js');
+let chalk = require('chalk');
+let prevValue = 0;
+let startValue = (process.memoryUsage().rss / 1048576).toFixed(1);
+
+function tickHeapDump() {
+    setImmediate(function () {
+        var memMB = (process.memoryUsage().rss / 1048576).toFixed(1);
+        if (prevValue != memMB) {
+            let prefix = chalk.bold.red("▲");
+            if (memMB < prevValue) {
+                prefix = chalk.bold.green("▼");
+            }
+            cli.info("Memory: " + prefix + " " + (memMB - prevValue).toFixed(1) + 'Mb' + " start: " + startValue + "Mb   now: " + memMB + "Mb   (" + (memMB - startValue).toFixed(1) + "Mb)");
+            prevValue = memMB;
+        }
+    });
+}
+
+class profilerPlugin extends plugin {
+    onInit() {
+        tickHeapDump();
+        setInterval(() => {
+            tickHeapDump();
+        }, 5000);
+    }
+}
+
+exports.default = profilerPlugin;