Basic EVOLV setup

src/nodeClass.js

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+/**
+ * node class.js
+ *
+ * Encapsulates all node logic in a reusable class. In future updates we can split this into multiple generic classes and use the config to specifiy which ones to use.
+ * This allows us to keep the Node-RED node clean and focused on wiring up the UI and event handlers.
+ */
+const Specific = require("./specificClass.js");
+
+class nodeClass {
+  /**
+   * Create a Node.
+   * @param {object} uiConfig - Node-RED node configuration.
+   * @param {object} RED    - Node-RED runtime API.
+   */
+  constructor(uiConfig, RED, nodeInstance, nameOfNode) {
+
+    // Preserve RED reference for HTTP endpoints if needed
+    this.node = nodeInstance; // This is the Node-RED node instance, we can use this to send messages and update status
+    this.RED = RED; // This is the Node-RED runtime API, we can use this to create endpoints if needed
+    this.name = nameOfNode; // This is the name of the node, it should match the file name and the node type in Node-RED
+    this.source = null; // Will hold the specific class instance
+    this.config = null; // Will hold the merged configuration
+
+    // Load default & UI config
+    this._loadConfig(uiConfig);
+
+    // Instantiate core class
+    this._setupSpecificClass();
+
+    // Wire up event and lifecycle handlers
+    // this._registerChild();
+    this._startTickLoop();
+    // this._attachInputHandler();
+    this._attachCloseHandler();
+  }
+
+  /**
+   * Load and merge default config with user-defined settings.
+   * @param {object} uiConfig - Raw config from Node-RED UI.
+   */
+  _loadConfig(uiConfig) {
+
+    // Merge UI config over defaults
+    this.config = {
+      general: {
+        name: uiConfig.name,
+        id: this.node.id, // node.id is for the child registration process
+        unit: uiConfig.unit, // add converter options later to convert to default units (need like a model that defines this which units we are going to use and then conver to those standards)
+        logging: {
+          enabled: uiConfig.enableLog,
+          logLevel: uiConfig.logLevel
+        }
+      },
+      functionality: {
+        positionVsParent: uiConfig.positionVsParent || 'atEquipment', // Default to 'atEquipment' if not specified
+      }
+    };
+  }
+
+  /**
+   * Instantiate the specific class and store as source.
+   */
+  _setupSpecificClass() {
+
+    this.source = new Specific(this.config);
+
+    //store in node 
+    this.node.source = this.source; // Store the source in the node instance for easy access
+  }
+
+  /**
+   * Register this node as a child upstream and downstream.
+   * Delayed to avoid Node-RED startup race conditions.
+   */
+  _registerChild() {
+    setTimeout(() => {
+      this.node.send([
+        null,
+        null,
+        { topic: 'registerChild', payload: this.config.general.id, positionVsParent: this.config?.functionality?.positionVsParent || 'atEquipment' },
+      ]);
+    }, 100);
+  }
+
+  /**
+   * Start the periodic tick loop.
+   */
+  _startTickLoop() {
+    setTimeout(() => {
+      this._tickInterval = setInterval(() => this._tick(), 1000);
+    }, 1000);
+  }
+
+  /**
+   * Execute a single tick and send outputs.
+   */
+  _tick() {
+    processMsg = null;
+    influxMsg = null;
+
+    // Send only updated outputs on ports 0 & 1
+    this.node.send([processMsg, influxMsg, null]);
+  }
+
+  /**
+   * Attach the node's input handler, routing control messages to the class.
+   */
+  _attachInputHandler() {
+    this.node.on('input', (msg, send, done) => {
+     /* Update to complete event based node by putting the tick function after an input event */
+      switch(msg.topic) {
+            case 'registerChild':
+              // Register this node as a child of the parent node
+              const childId = msg.payload;
+              const childObj = this.RED.nodes.getNode(childId); 
+              this.source.childRegistrationUtils.registerChild(childObj.source ,msg.positionVsParent);
+              break;
+          }
+    });
+  }
+
+  /**
+   * Clean up timers and intervals when Node-RED stops the node.
+   */
+  _attachCloseHandler() {
+    this.node.on('close', (done) => {
+      clearInterval(this._tickInterval);
+      done();
+    });
+  }
+}
+
+module.exports = nodeClass;