Add settling basin node, fixed issue with object assignment

additional_nodes/settling-basin.html

@@ -0,0 +1,57 @@
+<script type="text/javascript">
+    RED.nodes.registerType("settling-basin", {
+        category: "WWTP",
+        color: "#e4a363",
+        defaults: {
+            name: { value: "" },
+            SVI: { value: 0.1, required: true },
+            inlet: { value: 1, required: true }
+        },
+        inputs: 1,
+        outputs: 2,
+        outputLabels: ["Main effluent", "Sludge effluent"],
+        icon: "font-awesome/fa-random",
+        label: function() {
+            return this.name || "Settling basin";
+        },
+        oneditprepare: function() {
+            $("#node-input-SVI").typedInput({
+                type:"num",
+                types:["num"]
+            });
+            $("#node-input-inlet").typedInput({
+                type:"num",
+                types:["num"]
+            });
+        },
+        oneditsave: function() {
+            let SVI = parseFloat($("#node-input-SVI").typedInput("value"));
+            if (isNaN(SVI) || SVI < 0) {
+                RED.notify("SVI is not set correctly", {type: "error"});
+            }
+            let inlet = parseInt($("#node-input-n_inlets").typedInput("value"));
+            if (inlet < 1) {
+                RED.notify("Number of inlets not set correctly", {type: "error"});
+            }
+        }
+    });
+</script>
+
+<script type="text/html" data-template-name="settling-basin">
+    <div class="form-row">
+        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
+        <input type="text" id="node-input-name" placeholder="Name">
+    </div>
+    <div class="form-row">
+        <label for="node-input-SVI"><i class="fa fa-tag"></i> SVI (alternate)</label>
+        <input type="text" id="node-input-SVI" placeholder="">
+    </div>
+    <div class="form-row">
+        <label for="node-input-inlet"><i class="fa fa-tag"></i> Assigned inlet return line</label>
+        <input type="text" id="node-input-inlet" placeholder="#">
+    </div>
+</script>
+
+<script type="text/html" data-help-name="settling-basin">
+    <p>Settling tank</p>
+</script>