Complete general functions

helper/measurements/MeasurementBuilder.js

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+const Measurement = require('./Measurement');
+
+class MeasurementBuilder {
+  constructor() {
+    this.type = null;
+    this.variant = null;
+    this.position = null;
+    this.windowSize = 10; // Default window size
+  }
+
+  // e.g. 'pressure', 'flow', etc.
+  setType(type) {
+    this.type = type;
+    return this;
+  }
+
+  // e.g. 'predicted' or 'measured', etc..
+  setVariant(variant) {
+    this.variant = variant;
+    return this;
+  }
+
+  // Downstream or upstream of parent object
+  setPosition(position) {
+    this.position = position;
+    return this;
+  }
+
+  // default size of the data that gets tracked
+  setWindowSize(windowSize) {
+    this.windowSize = windowSize;
+    return this;
+  }
+
+  build() {
+    // Validate required fields
+    if (!this.type) {
+      throw new Error('Measurement type is required');
+    }
+    if (!this.variant) {
+      throw new Error('Measurement variant is required');
+    }
+    if (!this.position) {
+      throw new Error('Measurement position is required');
+    }
+
+    return new Measurement(
+      this.type,
+      this.variant,
+      this.position,
+      this.windowSize
+    );
+  }
+}
+
+module.exports = MeasurementBuilder;