552 lines
25 KiB
TypeScript
552 lines
25 KiB
TypeScript
import type { FastifyInstance } from "fastify";
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import type { PiProcessManager } from "../pi/pi-process-manager.js";
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import type { SessionRow, ThtRunner } from "../tht/tht-runner.js";
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import type { SseHub } from "../sse/sse-hub.js";
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import type { Settings } from "../settings/settings-store.js";
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import { getPrincipal } from "../auth/auth.js";
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import type { PrincipalContext } from "../auth/principal.js";
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import type { ReadinessManager } from "../runtime/readiness-manager.js";
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import type { ListModelsFn } from "./meta.js";
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const BOOTSTRAP_FAILURE_MESSAGE =
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"Session startup failed. Check configuration and connectivity, then Resume the session.";
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const READINESS_FAILURE_MESSAGE =
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"Session services are not ready. Check configuration and connectivity, then try again.";
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const RESUME_FAILURE_MESSAGE =
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"Session could not be resumed. Check configuration and connectivity, then try again.";
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const DWH_UNREACHABLE_MESSAGE =
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"Cannot start a session: the database is unreachable. Check the VPN connection and try again.";
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const MODEL_UNAVAILABLE_MESSAGE =
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"Selected model is unavailable. Check Pi authentication and model settings, then try again.";
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export function sessionRoutes(
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app: FastifyInstance,
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d: {
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mgr: PiProcessManager; tht: ThtRunner; hub: SseHub;
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getSettings: (principal: PrincipalContext) => Promise<Settings>;
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readiness: ReadinessManager;
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listModels: ListModelsFn;
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/** Local-only guard: probe DWH reachability before creating a session (run-stack.sh). */
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dwhPrecheck?: boolean;
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},
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) {
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const lifecycleTails = new Map<string, Promise<void>>();
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const boundRuntimes = new Map<
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string,
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ReturnType<PiProcessManager["createFor"]>
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>();
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const runtimeManifestReaders = new WeakMap<
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ReturnType<PiProcessManager["createFor"]>,
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() => Promise<any>
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>();
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const failurePersistenceClaimed = new WeakSet<
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ReturnType<PiProcessManager["createFor"]>
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>();
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const withSessionLifecycle = async <T>(id: string, work: () => Promise<T>): Promise<T> => {
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const previous = lifecycleTails.get(id) ?? Promise.resolve();
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let release!: () => void;
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const gate = new Promise<void>((resolve) => { release = resolve; });
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const tail = previous.then(() => gate);
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lifecycleTails.set(id, tail);
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await previous;
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try {
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return await work();
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} finally {
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release();
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if (lifecycleTails.get(id) === tail) lifecycleTails.delete(id);
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}
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};
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const info = (id: string, text: string, level = "info") =>
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d.hub.publish(id, "info", { type: "info", level, text });
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const runnerFor = (principal: PrincipalContext): any => {
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const runner = d.tht as any;
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return typeof runner.withPrincipal === "function" ? runner.withPrincipal(principal) : runner;
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};
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const isNotFound = (error: unknown) =>
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/not found|non trovata|inesistente|404/i.test(error instanceof Error ? error.message : String(error));
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/** RLS makes a foreign session indistinguishable from a missing one. */
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const authorize = async (principal: PrincipalContext, id: string, workspace?: string): Promise<any | undefined> => {
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try {
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const runner = runnerFor(principal);
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// Dependency-injected runners in legacy route tests may model only the mutation under
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// test. Production ThtRunner always exposes sessionShow; keep that test seam harmless.
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if (typeof runner.sessionShow !== "function") return {};
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const manifest = await runner.sessionShow(id, workspace);
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return manifest ?? undefined;
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} catch (error) {
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if (isNotFound(error)) return undefined;
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throw error;
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}
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};
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const storageFailure = (reply: any) => reply.code(503).send({ error: "session storage is unavailable" });
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const releaseIfFinalized = async (
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id: string, rt: ReturnType<PiProcessManager["createFor"]>,
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): Promise<boolean> => {
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if (d.mgr.get(id) !== rt || boundRuntimes.get(id) !== rt) return false;
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const readManifest = runtimeManifestReaders.get(rt);
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if (!readManifest || (await readManifest())?.status !== "finalized") return false;
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if (!d.mgr.teardownIfCurrent(id, rt)) return false;
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if (boundRuntimes.get(id) === rt) boundRuntimes.delete(id);
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return true;
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};
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const releaseFinalizedRuntimes = async (): Promise<void> => {
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await Promise.all([...boundRuntimes.entries()].map(([id, rt]) =>
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withSessionLifecycle(id, () => releaseIfFinalized(id, rt)).catch((error: unknown) => {
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console.error(`[session:${id}] stale runtime cleanup failed:`, error);
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}),
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));
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};
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const bindRuntime = (
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id: string, rt: ReturnType<PiProcessManager["createFor"]>, runner: any, workspace?: string,
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) => {
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const previous = boundRuntimes.get(id);
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boundRuntimes.set(id, rt);
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if (typeof runner.sessionShow === "function") {
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runtimeManifestReaders.set(rt, () => runner.sessionShow(id, workspace));
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}
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try {
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rt.bridge.onClientEvent((e) => {
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// Child termination is asynchronous. Ignore queued events from a runtime once a newer
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// identity is bound or the session is explicitly closed/deleted. The active identity
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// remains bound after an unexpected exit so its public failure events still reach SSE.
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if (boundRuntimes.get(id) !== rt) return;
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if (e.type === "system_event" && e.event === "session_failed") {
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if (!failurePersistenceClaimed.has(rt)) {
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failurePersistenceClaimed.add(rt);
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void withSessionLifecycle(id, async () => {
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// agent_end can release the old binding before this queued work acquires the lock.
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// Undefined means no replacement; a different identity means Resume won and the
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// old failure must not touch its manifest.
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const bound = boundRuntimes.get(id);
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if (bound !== undefined && bound !== rt) return;
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// Best-effort by design (crash path), but a storage outage must be
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// visible server-side: the manifest stays open and resume remains legal.
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await runner.failSession(id, workspace).catch((error: unknown) => {
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console.error(`[session:${id}] failSession persistence failed:`, error);
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});
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}).catch(() => undefined);
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}
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}
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d.hub.publish(id, e.type, e);
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if (e.type === "system_event" && e.event === "agent_end") {
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if (d.mgr.get(id) !== rt && boundRuntimes.get(id) === rt) {
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boundRuntimes.delete(id);
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} else if (typeof runner.sessionShow === "function") {
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void withSessionLifecycle(id, () => releaseIfFinalized(id, rt)).catch((error: unknown) => {
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console.error(`[session:${id}] terminal runtime cleanup failed:`, error);
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});
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}
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}
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});
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} catch (error) {
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if (previous) boundRuntimes.set(id, previous);
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else if (boundRuntimes.get(id) === rt) boundRuntimes.delete(id);
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throw error;
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}
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};
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const bootstrap = (
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id: string,
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rt: ReturnType<PiProcessManager["createFor"]>,
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runner: any,
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workspace: string | undefined,
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configure: Promise<void>,
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retrieval: Promise<void> | null,
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start: () => void,
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) => {
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void (async () => {
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try {
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if (retrieval) info(id, "Preparing retrieval context");
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await Promise.all([configure, retrieval]);
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if (d.mgr.get(id) !== rt) return;
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info(id, "Starting model");
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if (d.mgr.get(id) !== rt) return;
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start();
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} catch (error) {
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// The client only ever sees the generic BOOTSTRAP_FAILURE_MESSAGE; log the real
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// cause server-side so failures (e.g. an unreachable DWH/vector host behind a
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// dropped VPN) are diagnosable from the backend console instead of silent.
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console.error(`[pi:${id}] bootstrap failed:`, error instanceof Error ? error.message : error);
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void withSessionLifecycle(id, async () => {
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// A bootstrap continuation can settle after Close/Delete or after a replacement was
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// installed. Claim only the runtime identity that actually failed; holding the same
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// lifecycle lock through persistence prevents a Resume from becoming that failure's
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// accidental target.
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if (d.mgr.get(id) !== rt || !d.mgr.teardownIfCurrent(id, rt)) return;
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if (!failurePersistenceClaimed.has(rt)) {
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failurePersistenceClaimed.add(rt);
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await runner.failSession(id, workspace).catch(() => undefined);
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}
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rt.bridge.emitClientEvent({ type: "info", level: "error", text: BOOTSTRAP_FAILURE_MESSAGE });
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rt.bridge.emitClientEvent({ type: "system_event", event: "session_failed" });
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rt.bridge.emitClientEvent({ type: "system_event", event: "agent_end" });
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});
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}
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})();
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};
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app.post("/runtime/prewarm", async (req, reply) => {
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let settings: Settings;
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try { settings = await d.getSettings(getPrincipal(req)); } catch { return storageFailure(reply); }
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const workspace = settings.workspace ?? "";
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void d.readiness.ensure(workspace, getPrincipal(req)).catch(() => undefined);
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return reply.code(202).send({ status: "warming" });
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});
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app.post("/sessions", async (req, reply) => {
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const b = req.body as { question: string; name?: string };
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const principal = getPrincipal(req);
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let s: Settings;
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try { s = await d.getSettings(principal); } catch { return storageFailure(reply); }
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const runner = runnerFor(principal);
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await releaseFinalizedRuntimes();
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const ensure = await d.readiness.ensure(s.workspace ?? "", principal);
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if (!ensure.ok) return reply.code(503).send({ error: READINESS_FAILURE_MESSAGE });
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// Local-only: verify the DWH is reachable BEFORE creating the session, so a dropped
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// VPN surfaces as an up-front alert instead of a session that spawns Pi and then dies
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// in bootstrap retrieval. `code` lets the client show a specific message.
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if (d.dwhPrecheck) {
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const ping = await runner.dbPing(s.workspace);
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if (!ping.ok) {
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console.error(`[dwh-precheck] refusing new session — DWH unreachable: ${ping.detail}`);
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return reply.code(503).send({ error: DWH_UNREACHABLE_MESSAGE, code: "dwh_unreachable" });
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}
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}
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if (s.provider && s.model) {
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let available: Awaited<ReturnType<ListModelsFn>>;
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try {
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available = await d.listModels();
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} catch {
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return reply.code(503).send({
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error: MODEL_UNAVAILABLE_MESSAGE,
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code: "model_unavailable",
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});
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}
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const selectedAvailable = available.some(
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(candidate) => candidate.provider === s.provider && candidate.id === s.model,
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);
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if (!selectedAvailable) {
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return reply.code(503).send({
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error: MODEL_UNAVAILABLE_MESSAGE,
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code: "model_unavailable",
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});
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}
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}
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// Settings (global) supply workspace/provider/model/thinking. The new-question
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// form sends only the question text. `workspace` selects the tht `-c <config>`.
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let id: string;
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try {
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({ id } = await runner.sessionNew({
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question: b.question, name: b.name, workspace: s.workspace,
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provider: s.provider, model: s.model, thinking: s.thinking,
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}));
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} catch { return storageFailure(reply); }
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const options = {
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provider: s.provider,
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model: s.model,
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thinking: s.thinking,
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author: principal.displayName ?? principal.subject,
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principal,
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question: b.question,
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};
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let rt: ReturnType<PiProcessManager["createFor"]> | undefined;
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try {
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rt = d.mgr.createFor(id, options);
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bindRuntime(id, rt, runner, s.workspace);
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} catch (error) {
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if (rt) d.mgr.teardownIfCurrent(id, rt);
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console.error(
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`[pi:${id}] runtime construction failed:`,
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error instanceof Error ? error.message : "unknown error",
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);
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await runner.failSession(id, s.workspace).catch((persistenceError: unknown) => {
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console.error(`[session:${id}] failSession persistence failed:`, persistenceError);
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});
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return reply.code(503).send({ error: BOOTSTRAP_FAILURE_MESSAGE });
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}
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info(id, "Session created");
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bootstrap(
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id, rt, runner, s.workspace, d.mgr.configure(rt, options),
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runner.searchPack(b.question, id, s.workspace),
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() => d.mgr.start(id, rt, options),
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);
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return { id };
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});
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app.get("/sessions", async (req, reply) => {
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const principal = getPrincipal(req);
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const scope = (req.query as { scope?: string }).scope ?? "mine";
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if (scope !== "mine" && scope !== "all") return reply.code(400).send({ error: "scope must be mine or all" });
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if (scope === "all" && !principal.isAdmin) return reply.code(403).send({ error: "admin scope required" });
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try {
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const settings = await d.getSettings(principal);
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// Admin RLS is deliberately disabled for a normal 'mine' listing.
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const scopedPrincipal = scope === "mine" ? { ...principal, isAdmin: false } : principal;
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const list: SessionRow[] = await runnerFor(scopedPrincipal).sessionList(settings.workspace);
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// Annotate each row with whether a live Pi runtime is currently bound. The client
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// opens an `active` session straight into its live view (reconnecting to its pending
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// gate), while a cold session keeps its explicit Resume affordance — so a mere click
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// never spawns a runtime.
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return list.map((row) => ({ ...row, active: d.mgr.get(row.id) !== undefined }));
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} catch { return storageFailure(reply); }
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});
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app.get("/sessions/:id", async (req, reply) => {
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const principal = getPrincipal(req);
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try {
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const settings = await d.getSettings(principal);
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const manifest = await authorize(principal, (req.params as any).id, settings.workspace);
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return manifest ?? reply.code(404).send({ error: "session not found" });
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} catch { return storageFailure(reply); }
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});
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app.post("/sessions/:id/response", async (req, reply) => {
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const id = (req.params as any).id;
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const principal = getPrincipal(req);
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try {
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const settings = await d.getSettings(principal);
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if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
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} catch { return storageFailure(reply); }
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const rt = d.mgr.get(id);
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if (!rt) return reply.code(404).send({ error: "sessione non attiva" });
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if (!rt.bridge.respond((req.body as any).ui_response)) {
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return reply.code(409).send({ error: "risposta non corrispondente al gate in attesa" });
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}
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return reply.code(204).send();
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});
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app.post("/sessions/:id/steer", async (req, reply) => {
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const id = (req.params as any).id;
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const principal = getPrincipal(req);
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try {
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const settings = await d.getSettings(principal);
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if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
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} catch { return storageFailure(reply); }
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const rt = d.mgr.get(id);
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if (!rt) return reply.code(404).send({ error: "sessione non attiva" });
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rt.bridge.steer((req.body as any).text);
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return reply.code(204).send();
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});
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app.post("/sessions/:id/resume", async (req, reply) => {
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const id = (req.params as any).id;
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const principal = getPrincipal(req);
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return withSessionLifecycle(id, async () => {
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let settings: Settings;
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let manifest: any;
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try {
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settings = await d.getSettings(principal);
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manifest = await authorize(principal, id, settings.workspace);
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} catch { return storageFailure(reply); }
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if (!manifest) return reply.code(404).send({ error: "session not found" });
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const runner = runnerFor(principal);
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// Read-only contract FIRST: a finalized/archived session must refuse resume even
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// when a lingering runtime still looks active — the manifest is the truth.
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if (manifest?.status === "finalized" || manifest?.archived) {
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return reply.code(409).send({ error: "sessione in sola lettura (finalizzata o archiviata)" });
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}
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// This check belongs inside the per-session lock: a preceding cold Resume may have
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// installed a running runtime while this request was waiting.
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const existing = d.mgr.get(id);
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if (existing) {
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const state = existing.bridge.turnState();
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if (state === "running" || state === "waiting") {
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return reply.code(200).send({ id, alreadyActive: true });
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}
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}
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const ensure = await d.readiness.ensure(settings.workspace ?? "", principal);
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if (!ensure.ok) return reply.code(503).send({ error: READINESS_FAILURE_MESSAGE });
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const saved = manifest as { provider?: string; model?: string; thinking?: string } | null;
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const options = {
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provider: saved?.provider,
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model: saved?.model,
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thinking: saved?.thinking ?? settings.thinking,
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author: principal.displayName ?? principal.subject,
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principal,
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mode: "resume" as const,
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};
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// Reopening is validation, not the transport commit point. Keep the old hub intact if
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// persistence cannot be reopened.
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try {
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await runner.reopenSession(id, settings.workspace);
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} catch {
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return reply.code(503).send({ error: RESUME_FAILURE_MESSAGE });
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}
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// Re-check immediately before the replacement commit. A lifecycle operation that ran
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// before this request acquired the lock may have changed or removed the runtime.
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const current = d.mgr.get(id);
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if (current) {
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const state = current.bridge.turnState();
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if (state === "running" || state === "waiting") {
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return reply.code(200).send({ id, alreadyActive: true });
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}
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}
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let rt: ReturnType<PiProcessManager["createFor"]> | undefined;
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try {
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if (current) {
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if (boundRuntimes.get(id) === current) boundRuntimes.delete(id);
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d.mgr.teardownIfCurrent(id, current);
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}
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rt = d.mgr.createFor(id, options);
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bindRuntime(id, rt, runner, settings.workspace);
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} catch {
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// A created-but-unbound runtime is not usable. The old hub remains attached because
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// clear() has not happened yet.
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if (rt) {
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if (boundRuntimes.get(id) === rt) boundRuntimes.delete(id);
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d.mgr.teardownIfCurrent(id, rt);
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}
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return reply.code(503).send({ error: RESUME_FAILURE_MESSAGE });
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}
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// Commit the replacement only after reopen + runtime creation/binding succeeded, and
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// immediately before the first event produced by the new Resume.
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d.hub.clear(id);
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info(id, "Resuming session");
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bootstrap(id, rt, runner, settings.workspace, d.mgr.configure(rt, options), null, () => d.mgr.start(id, rt, options));
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return reply.code(200).send({ id, alreadyActive: false });
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});
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});
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app.post("/sessions/:id/close", async (req, reply) => {
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const id = (req.params as { id: string }).id;
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const principal = getPrincipal(req);
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return withSessionLifecycle(id, async () => {
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let settings: Settings;
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try {
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settings = await d.getSettings(principal);
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if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
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} catch { return storageFailure(reply); }
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// Invalidate the live generation before persistence can yield. Otherwise its deferred
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// bootstrap may start Pi while Close is already in progress.
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const current = d.mgr.get(id);
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boundRuntimes.delete(id);
|
|
if (current) d.mgr.teardownIfCurrent(id, current);
|
|
try {
|
|
await runnerFor(principal).closeSession(id, settings.workspace);
|
|
} catch {
|
|
return storageFailure(reply);
|
|
} finally {
|
|
// clear, NOT forget: a closed session can be reopened, and the per-session seq
|
|
// monotonicity is what keeps a browser's old cursor detectable. The buffer is
|
|
// emptied here; only delete discards the id counter.
|
|
d.hub.clear(id);
|
|
}
|
|
return { closed: true };
|
|
});
|
|
});
|
|
app.get("/sessions/:id/events", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
} catch { return storageFailure(reply); }
|
|
const rt = d.mgr.get(id);
|
|
// Add CORS headers manually: reply.raw.writeHead bypasses Fastify's onSend hooks
|
|
// (where @fastify/cors injects headers), so we must set them explicitly here.
|
|
const origin = (req.headers.origin as string | undefined) ?? "*";
|
|
reply.raw.writeHead(200, {
|
|
"Content-Type": "text/event-stream",
|
|
"Cache-Control": "no-cache",
|
|
"X-Accel-Buffering": "no",
|
|
Connection: "keep-alive",
|
|
"Access-Control-Allow-Origin": origin,
|
|
"Access-Control-Allow-Credentials": "true",
|
|
});
|
|
// Send the handshake immediately. Without this, Node waits for the first event body and
|
|
// proxies/clients cannot establish an idle SSE subscription or inspect its headers.
|
|
reply.raw.flushHeaders();
|
|
const send = (event: string, data: object, eventId: string) =>
|
|
reply.raw.write(`id: ${eventId}\nevent: ${event}\ndata: ${JSON.stringify(data)}\n\n`);
|
|
const off = d.hub.subscribe(id, send, {
|
|
// Raw cursor candidates: the hub parses "<generation>:<seq>" and treats any
|
|
// other-generation (or legacy numeric) cursor as stale → replay from the start.
|
|
after: [req.headers["last-event-id"], (req.query as { lastEventId?: unknown }).lastEventId],
|
|
pending: rt?.bridge.pendingWidget() ?? null,
|
|
// clear()/forget() end every old transport so native EventSource reconnects with its
|
|
// Last-Event-ID instead of remaining attached to a subscriber callback that no longer exists.
|
|
close: () => {
|
|
if (!reply.raw.writableEnded) reply.raw.end();
|
|
},
|
|
});
|
|
req.raw.on("close", off);
|
|
});
|
|
app.post("/sessions/:id/rename", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
await runnerFor(principal).setName(id, (req.body as any).name, settings.workspace);
|
|
} catch { return storageFailure(reply); }
|
|
return reply.code(204).send();
|
|
});
|
|
app.post("/sessions/:id/group", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
await runnerFor(principal).setGroup(id, (req.body as any).group, settings.workspace);
|
|
} catch { return storageFailure(reply); }
|
|
return reply.code(204).send();
|
|
});
|
|
app.post("/sessions/:id/archive", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
await runnerFor(principal).archive(id, settings.workspace);
|
|
} catch { return storageFailure(reply); }
|
|
return reply.code(204).send();
|
|
});
|
|
app.post("/sessions/:id/unarchive", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
await runnerFor(principal).unarchive(id, settings.workspace);
|
|
} catch { return storageFailure(reply); }
|
|
return reply.code(204).send();
|
|
});
|
|
app.delete("/sessions/:id", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
return withSessionLifecycle(id, async () => {
|
|
let settings: Settings;
|
|
try {
|
|
settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
} catch { return storageFailure(reply); }
|
|
const current = d.mgr.get(id);
|
|
boundRuntimes.delete(id);
|
|
if (current) d.mgr.teardownIfCurrent(id, current);
|
|
try {
|
|
await runnerFor(principal).deleteSession(id, settings.workspace);
|
|
} catch {
|
|
return storageFailure(reply);
|
|
}
|
|
d.hub.forget(id);
|
|
return reply.code(204).send();
|
|
});
|
|
});
|
|
app.get("/sessions/:id/documents", async (req, reply) => {
|
|
const id = (req.params as any).id;
|
|
const principal = getPrincipal(req);
|
|
try {
|
|
const settings = await d.getSettings(principal);
|
|
if (!await authorize(principal, id, settings.workspace)) return reply.code(404).send({ error: "session not found" });
|
|
return await runnerFor(principal).documents(id, settings.workspace);
|
|
} catch { return storageFailure(reply); }
|
|
});
|
|
}
|