Support config-driven output formatting

src/helper/outputUtils.js

@@ -1,12 +1,13 @@
+const { getFormatter } = require('./formatters');
+
 //this class will handle the output events for the node red node
 class OutputUtils {
   constructor() {
-    this.output ={};
-    this.output['influxdb'] = {};
-    this.output['process'] = {};
+    this.output = {};
   }
 
   checkForChanges(output, format) {
+    this.output[format] = this.output[format] || {};
     const changedFields = {};
     for (const key in output) {
       if (Object.prototype.hasOwnProperty.call(output, key) && output[key] !== this.output[format][key]) {
@@ -27,55 +28,43 @@ class OutputUtils {
   }
 
   formatMsg(output, config, format) {
-  
-    //define emtpy message
       let msg = {};
 
       // Compare output with last output and only include changed values
       const changedFields = this.checkForChanges(output,format);
 
       if (Object.keys(changedFields).length > 0) {
-
-        switch (format) {
-          case 'influxdb': {
-            // Extract the relevant config properties.
-            const relevantConfig = this.extractRelevantConfig(config);
-            // Flatten the tags so that no nested objects are passed on.
-            const flatTags = this.flattenTags(relevantConfig);
-            msg = this.influxDBFormat(changedFields, config, flatTags);
-
-            break;
-          }
-
-          case 'process':
-
-            // Compare output with last output and only include changed values
-            msg = this.processFormat(changedFields,config);
-            //console.log(msg);
-            break;
-
-          default:
-            console.log('Unknown format in output utils');
-            break;
-        }
+        const measurement = config.general.name;
+        const flatTags = this.flattenTags(this.extractRelevantConfig(config));
+        const formatterName = this.resolveFormatterName(config, format);
+        const formatter = getFormatter(formatterName);
+        const payload = formatter.format(measurement, {
+          fields: changedFields,
+          tags: flatTags,
+          config,
+          channel: format,
+        });
+        msg = this.wrapMessage(measurement, payload);
         return msg;
       }
   }
-  
 
-  influxDBFormat(changedFields, config , flatTags) {
-    // Create the measurement and topic using softwareType and name config.functionality.softwareType + .
-    const measurement = config.general.name;
-    const payload = {
-      measurement: measurement,
-      fields: changedFields,
-      tags: flatTags,
-      timestamp: new Date(),
+  resolveFormatterName(config, channel) {
+    const outputConfig = config.output || {};
+    if (channel === 'process') {
+      return outputConfig.process || 'process';
+    }
+    if (channel === 'influxdb') {
+      return outputConfig.dbase || 'influxdb';
+    }
+    return outputConfig[channel] || channel;
+  }
+
+  wrapMessage(measurement, payload) {
+    return {
+      topic: measurement,
+      payload,
     };
-
-    const topic = measurement;
-    const msg = { topic: topic, payload: payload };
-    return msg;
   }
 
   flattenTags(obj) {
@@ -119,15 +108,6 @@ class OutputUtils {
       model: config.asset?.model,
     };
   }
-
-  processFormat(changedFields,config) {
-        // Create the measurement and topic using softwareType and name config.functionality.softwareType + .
-        const measurement = config.general.name;
-        const payload = changedFields;
-        const topic = measurement;
-        const msg = { topic: topic, payload: payload };
-        return msg;
-  }
 }
 
 module.exports = OutputUtils;