webthing-iotjs: Add example webthing

Change-Id: I9cffaefb4e6fdd94464478c05d7c1ea68b5b68bb
Signed-off-by: Philippe Coval <p.coval@samsung.com>

example/webthing-iotjs/index.js

@@ -0,0 +1,66 @@
+// -*- mode: js; js-indent-level:2;  -*-
+// SPDX-License-Identifier: MPL-2.0
+
+/**
+ *
+ * Copyright 2019-present Samsung Electronics France SAS, and other contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/#
+ */
+var console = require('console'); // Disable logs here by editing to '!console.log'
+var log = console.log || function () {};
+var verbose = console.log || function () {};
+var webthing = require('webthing-iotjs');
+
+
+function LevelProperty(thing, name, value, metadata, config) {
+  var that = this;
+  this.config = config || {};
+  webthing.Property.call(this, thing,
+                         name || "Level",
+                         new webthing.Value(Number(value)), {
+                           title: metadata && metadata.title || "Level: ".concat(name),
+                           type: 'number',
+                           minimum: this.config.minimum || 0,
+                           maximum: this.config.maximum || 100,
+                           description: metadata && metadata.description || "Level"
+                         });
+  {
+    this.config = config;
+    that.value.valueForwarder = function (value) {
+      verbose('forward: ' + value);
+    };
+  }
+}
+
+function LevelThing(name, type, description) {
+  var that = this;
+  webthing.Thing.call(this,
+                      name || 'Level',
+                      type || [],
+                      description || 'A web connected Level');
+  {
+    this.addProperty(new LevelProperty(this, 'level', 100, {
+      description: 'Level'
+    }));
+  }
+}
+
+
+function App() {
+  var that = this;
+  this.port = process.argv[3] ? Number(process.argv[3]) : 8888;
+  this.url = "http://localhost:".concat(this.port);
+  this.server = new webthing.WebThingServer(new webthing.SingleThing(new LevelThing()), this.port);
+  process.on('SIGINT', function () {
+    that.server.stop();
+  });
+  console.log(this.url);
+  this.server.start();
+}
+
+if (module.parent === null) {
+  App()
+}