47 lines
1.0 KiB
TypeScript
47 lines
1.0 KiB
TypeScript
import { postCloudIngest } from '../cloud-ingest.js'
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import { log } from '../helpers/log.js'
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import { parseJson } from '../helpers/parse.js'
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import type { TopicHandler } from '../types.js'
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const EDGE = 'demo'
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type DemoPlcPayload = {
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tag: string
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value: number
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}
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type DemoPlcMetric = {
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edge: string
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timestamp: string
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tag: string
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value: number
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}
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function toMetric(payload: DemoPlcPayload, timestamp: string): DemoPlcMetric {
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return {
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edge: EDGE,
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timestamp,
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tag: payload.tag,
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value: payload.value,
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}
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}
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async function postMetric(metric: DemoPlcMetric): Promise<void> {
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const response = await postCloudIngest(metric)
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if (!response.ok) {
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const text = await response.text()
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throw new Error(text)
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}
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log('demo.plc.posted', { tag: metric.tag })
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}
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export const handleDemoPlc: TopicHandler = async (topic, payload) => {
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log('demo.plc.received', { topic, bytes: payload.length })
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const value = parseJson<DemoPlcPayload>(payload)
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const metric = toMetric(value, new Date().toISOString())
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await postMetric(metric)
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}
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