Implement scaffolding for InfluxDB consumer

src/consumers/index.ts

@@ -2,12 +2,14 @@ import { Dayjs } from "dayjs";
 import { Config } from "../config";
 import { MQTTConsumer } from "./mqtt";
 import { Measurement } from "../fetcher/types";
+import { InfluxDBConsumer } from "./influxdb";
 
 /**
  * Registered consumers
  */
 const consumers = [
-  new MQTTConsumer()
+  new MQTTConsumer(),
+  new InfluxDBConsumer()
 ];
 
 /**
@@ -16,5 +18,10 @@ const consumers = [
  * @param date date of measurement
  * @param measurement measurement data 
  */
-export const consume = (config: Config, date: Dayjs, measurement: Measurement) => 
-  consumers.forEach(consumer => consumer.consume(config, date, measurement));
+export const consume = (config: Config, date: Dayjs, measurement: Measurement) => consumers.forEach(consumer => {
+  try {    
+    consumer.consume(config, date, measurement); 
+  } catch (exception) {
+    console.error(`Exception during '${consumer.name}' consumer evaluation: ${exception}`);
+  }  
+});

src/consumers/influxdb/index.ts

@@ -0,0 +1,58 @@
+import { InfluxDB, Point } from "@influxdata/influxdb-client";
+import { Consumer } from "../abstract";
+import { InfluxDBConfig } from "./types";
+import { Dayjs } from "dayjs";
+import { Measurement } from "../../fetcher/types";
+
+export class InfluxDBConsumer extends Consumer<InfluxDBConfig> {
+  public name = 'influxdb';
+
+  protected requiredFields = [
+    'databaseURL',
+    'apiToken',
+    'organization',
+    'bucket',
+  ] as const;
+
+  protected async publish({ databaseURL, apiToken, organization, bucket }: InfluxDBConfig, date: Dayjs, measurement: Measurement) {
+    const db = new InfluxDB({ 
+      url: databaseURL,
+      token: apiToken,
+    });
+
+    const api = db.getWriteApi(organization, bucket);
+
+    const hourlyEnergy = measurement.energyForDay.values.map((value, index) => new Point('energy')
+      .timestamp(date.clone().set('hour', index+1).toDate())
+      .tag('profile', 'hourly')
+      .floatField('value', value)
+    );
+
+    const dailyEnergy = new Point('energy')
+      .timestamp(date.toDate())
+      .tag('profile', 'daily')
+      .floatField('value', measurement.energyForDay.sum);
+  
+    const monthlyEnergy = new Point('energy')
+      .timestamp(date.toDate())
+      .tag('profile', 'monthly')
+      .floatField('value', measurement.energyForMonth.sum);
+
+    const annualyEnergy = new Point('energy')
+      .timestamp(date.toDate())
+      .tag('profile', 'annualy')
+      .floatField('value', measurement.energyForYear.sum);
+
+    const reading = new Point('reading')
+      .timestamp(date.clone().set('hour', 23).set('minute', 59).set('second', 59).toDate())
+      .floatField('value', measurement.reading.C);
+
+    hourlyEnergy.forEach(api.writePoint);
+    api.writePoint(dailyEnergy);
+    api.writePoint(monthlyEnergy);
+    api.writePoint(annualyEnergy);
+    api.writePoint(reading);   
+    
+    api.close();
+  }
+}

src/consumers/influxdb/types.ts

@@ -0,0 +1,8 @@
+import { ConsumerConfig } from "../types";
+
+export type InfluxDBConfig = ConsumerConfig & {
+  databaseURL: string;
+  apiToken: string;
+  organization: string;
+  bucket: string;
+};

src/fetcher/index.ts

@@ -14,18 +14,21 @@ export class Fetcher {
   }  
 
   /**
-   * Collects the measurements for a specific date.
+   * Collects the measurements for a specific date and runs the consumers on the masurement data.
    * @param date - the measurement date (note, that 'todays' date may not be available at the time being when request is made)
    * @returns the measurement data
    */
   async fetch(date: Dayjs): Promise<Measurement> {
-    const monthEnd = date.endOf('month');
-    const endDay = monthEnd.isBefore(dayjs(), 'day') ? monthEnd : date;
+    const normalizedDate = date.startOf('day');
+    console.log(`Fetching measurements for: ${normalizedDate}`);
 
-    const energyForDay = await this.#service.getEnergyForDay(date);    
-    const energyForMonth = await this.#service.getEnergyForRange(date.startOf('month'), endDay);
-    const energyForYear = await this.#service.getEnergyForYear(date.format('YYYY'));    
-    const reading = await this.#service.getReadingForRange(date, date);
+    const monthEnd = normalizedDate.endOf('month');
+    const endDay = monthEnd.isBefore(dayjs(), 'day') ? monthEnd : normalizedDate;
+
+    const energyForDay = await this.#service.getEnergyForDay(normalizedDate);    
+    const energyForMonth = await this.#service.getEnergyForRange(normalizedDate.startOf('month'), endDay);
+    const energyForYear = await this.#service.getEnergyForYear(normalizedDate.format('YYYY'));    
+    const reading = await this.#service.getReadingForRange(normalizedDate, normalizedDate);
     
     const measurement: Measurement = {
       energyForDay,
@@ -34,7 +37,7 @@ export class Fetcher {
       reading: reading?.[0],
     };
 
-    consume(this.#config, date, measurement);
+    consume(this.#config, normalizedDate, measurement);
 
     return measurement;
   }