Aggiunto nodo debounce

my-debounce.html

@@ -0,0 +1,33 @@
+
+<script type="text/html" data-template-name="my-debounce">
+    <div class="form-row">
+        <label for="node-input-delay"><i class="fa fa-wrench"></i> Delay</label>
+        <input type="text" id="node-input-delay">
+    </div>
+
+  <div class="form-row">
+    <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="node-red:common.label.name"></span></label>
+     <input type="text" id="node-input-name" data-i18n="[placeholder]node-red:common.label.name">
+  </div>
+</script>
+
+<script type="text/html" data-help-name="my-debounce">
+    <p>Deduplica messaggi per valore del payload entro <code>delay</code>.</p>
+</script>
+
+<script type="text/javascript">
+    RED.nodes.registerType('my-debounce',{
+        category: 'function',
+        color: "#E6E0F8",
+        defaults: {
+            delay: { value: 1000, required: true, validate: RED.validators.number() },
+            name: { value: "" }
+        },
+        inputs: 1,
+        outputs: 1,
+        icon: "timer.png",
+        label: function() {
+            return this.name || "my-debounce";
+        }
+    });
+</script>

my-debounce.js

@@ -0,0 +1,27 @@
+
+module.exports = function (RED) {
+    "use strict";
+
+    function XMPPServerNode(n) {
+        RED.nodes.createNode(this, n);
+        this.delay_msec = n.delay;
+        //this.by_value = n.by_value;
+        this.recv = new Map();
+        this.on("input", msg => {
+            let msg_json = JSON.stringify(msg.payload);
+            let now = new Date();
+            for (let [key, val] of this.recv) {
+                if ((now.getTime() - val.getTime()) > this.delay_msec) {
+                    this.recv.delete(key);
+                }
+            }
+            if (!this.recv.has(msg_json)) {
+                this.send(msg);
+                this.recv.set(msg_json, now);
+            }
+        });
+    }
+
+    RED.nodes.registerType("my-debounce", XMPPServerNode);
+
+}

package.json

@@ -13,7 +13,8 @@
     "keywords": [ "node-red", "xmpp" ],
     "node-red"      : {
         "nodes"     : {
-            "xmpp": "92-xmpp.js"
+            "xmpp": "92-xmpp.js",
+            "my-debounce": "my-debounce.js"
         }
     },
     "author": {