add mapper. add v2 handler. add tag description short and full versions. delete topic[1-5].

app/src/handlers/demo-plc.ts

@@ -0,0 +1,85 @@
+import { parseJson } from '../helpers/parse.js'
+import type { TopicHandler } from '../types.js'
+
+export const TOPIC = 'data/demo/plc/v1'
+
+const EDGE = 'demo'
+const postUrl =
+  process.env.CLOUD_INGEST_URL ?? 'https://demo.backend.drill.greact.ru/ingest'
+
+type DemoPlcPayload = {
+  tag: string
+  value: number
+}
+
+type DemoPlcMetric = DemoPlcPayload & {
+  edge: string
+  timestamp: number
+}
+
+function isDemoPlcPayload(value: unknown): value is DemoPlcPayload {
+  if (!value || typeof value !== 'object') {
+    return false
+  }
+
+  const candidate = value as Partial<DemoPlcPayload>
+
+  return (
+    typeof candidate.tag === 'string' &&
+    candidate.tag.length > 0 &&
+    typeof candidate.value === 'number' &&
+    Number.isFinite(candidate.value)
+  )
+}
+
+function toMetric(payload: DemoPlcPayload, timestamp: number): DemoPlcMetric {
+  return {
+    edge: EDGE,
+    timestamp,
+    tag: payload.tag,
+    value: payload.value,
+  }
+}
+
+async function postMetric(metric: DemoPlcMetric): Promise<void> {
+  const response = await fetch(postUrl, {
+    method: 'POST',
+    headers: {
+      'content-type': 'application/json',
+    },
+    body: JSON.stringify(metric),
+  })
+
+  if (!response.ok) {
+    const text = await response.text()
+    console.error('demo.plc.post_error', {
+      status: response.status,
+      statusText: response.statusText,
+      body: text.slice(0, 500),
+    })
+    return
+  }
+
+  console.log('demo.plc.posted', { tag: metric.tag })
+}
+
+export const handleDemoPlc: TopicHandler = async (topic, payload) => {
+  console.log('demo.plc.received', { topic, bytes: payload.length })
+
+  let value: unknown
+
+  try {
+    value = parseJson(payload)
+  } catch (err) {
+    console.warn('demo.plc.invalid_json', { topic, err })
+    return
+  }
+
+  if (!isDemoPlcPayload(value)) {
+    console.warn('demo.plc.invalid_payload', { topic })
+    return
+  }
+
+  const metric = toMetric(value, Date.now())
+  await postMetric(metric)
+}