jhodgkin
04282232cc
Runs as a host-level systemd timer on CT122 (scripts/discover-devices.sh) rather than inside the api container, since real ARP entries live in the host's network namespace, not Docker's bridge network. See docs/device-discovery.md for the full writeup, including why literal passive-only ARP reading was dropped (near-empty result in practice). API reads the resulting JSON file each poll cycle, cross-references config/hosts.yaml's knownDevices list by IP, and serves /api/devices. Dashboard gets a new "Network Devices" table. Closes #9. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
import { readFile } from "node:fs/promises";
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import type Database from "better-sqlite3";
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import { upsertDevices, type DiscoveredDevice } from "../db/index.js";
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interface RawEntry {
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ip: string;
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mac: string;
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state: string;
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}
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// Reads the JSON file produced by scripts/discover-devices.sh (a systemd timer
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// on the deploy host, not this process) and labels each entry against the
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// known-device list from config/hosts.yaml. See docs/device-discovery.md.
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export async function refreshDevices(
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db: Database.Database,
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filePath: string,
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knownDevices: Map<string, string>
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): Promise<void> {
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let raw: RawEntry[];
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try {
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raw = JSON.parse(await readFile(filePath, "utf8"));
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} catch (err) {
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// Missing file (timer hasn't run yet, or not deployed on this host) isn't
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// fatal — just means no device data this cycle.
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if ((err as NodeJS.ErrnoException).code === "ENOENT") return;
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throw err;
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}
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const devices: DiscoveredDevice[] = raw.map((entry) => ({
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ip: entry.ip,
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mac: entry.mac,
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knownName: knownDevices.get(entry.ip) ?? null,
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}));
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upsertDevices(db, devices);
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}
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