fix(api): сообщать об отказах общего GRE-каталога

backend/src/services/gre-catalog-poll.test.ts

@@ -0,0 +1,17 @@
+import assert from "node:assert/strict"
+import { pollGreCatalog } from "./gre-catalog-poll.js"
+const devices = [{ id: 1, name: "Первый" }, { id: 2, name: "Второй" }]
+const mixed = await pollGreCatalog(devices, async device => {
+  if (device.id === 2) throw new Error("Таймаут тест")
+  return { tunnels: [{ id: "*1", serverId: "1" }] }
+})
+assert.deepEqual(mixed, { tunnels: [{ id: "*1", serverId: "1" }], failures: [{ serverId: "2", serverName: "Второй", error: "Таймаут тест" }] })
+assert.deepEqual(await pollGreCatalog(devices, async () => ({ tunnels: [] })), { tunnels: [], failures: [] })
+const failed = await pollGreCatalog(devices, async () => { throw new Error("Недоступно") })
+assert.equal(failed.tunnels.length, 0)
+assert.deepEqual(failed.failures.map(f => f.serverId), ["1", "2"])
+const foreign = await pollGreCatalog([devices[0]], async () => ({ tunnels: [{ serverId: "2" }] }))
+assert.equal(foreign.tunnels.length, 0)
+assert.equal(foreign.failures[0].serverId, "1")
+assert.deepEqual(await pollGreCatalog([], async () => { throw new Error("Не должен вызываться") }), { tunnels: [], failures: [] })
+console.log("gre catalog: partial/empty/failed/foreign contexts passed")

backend/src/services/gre-catalog-poll.ts

@@ -0,0 +1,14 @@
+export async function pollGreCatalog<S extends { id: number; name: string }, T extends { serverId: string }>(
+  devices: readonly S[], read: (device: S) => Promise<{ tunnels: T[] }>,
+): Promise<{ tunnels: T[]; failures: Array<{ serverId: string; serverName: string; error: string }> }> {
+  const results = await Promise.all(devices.map(async device => {
+    try {
+      const { tunnels } = await read(device)
+      if (!Array.isArray(tunnels) || tunnels.some(t => t.serverId !== String(device.id))) throw new Error("Чужой контекст GRE-каталога")
+      return { tunnels, failures: [] }
+    } catch (error) {
+      return { tunnels: [], failures: [{ serverId: String(device.id), serverName: device.name, error: error instanceof Error ? error.message : String(error) }] }
+    }
+  }))
+  return { tunnels: results.flatMap(r => r.tunnels), failures: results.flatMap(r => r.failures) }
+}