Optimize XYZAC motion updates and persist power-off recovery

web/app/worker-client.mjs

@@ -1,11 +1,43 @@
 export const CONTEXT_ID = "linuxcnc-2.10.0-pre0-wasm-m1-py-c1";
 export const PROTOCOL_SCHEMA = 1;
+const POWER_OFF_CHECKPOINT_KEY = "linuxcnc-web-wasm:xyzac-power-off-checkpoint";
 let CLIENT_INSTANCE = 0;
 
 function isObject(value) {
   return value !== null && typeof value === "object" && !Array.isArray(value);
 }
 
+function persistPowerOffCheckpoint(message) {
+  const payload = isObject(message?.payload) ? message.payload : {};
+  if (message.kind !== "COMMAND_RESULT" || payload.status !== "verified" || payload.command !== "POWER" || payload.active !== false || !isObject(payload.recovery_checkpoint)) return;
+  try { globalThis.localStorage?.setItem(POWER_OFF_CHECKPOINT_KEY, JSON.stringify(payload.recovery_checkpoint)); } catch { /* checkpoint remains visible in the response */ }
+}
+
+function attachPowerOffCheckpoint(payload) {
+  if (!isObject(payload)) return payload;
+  try {
+    const raw = globalThis.localStorage?.getItem(POWER_OFF_CHECKPOINT_KEY);
+    return raw ? { ...payload, recovery_checkpoint: JSON.parse(raw) } : payload;
+  } catch { return payload; }
+}
+
+function clearPowerOffCheckpoint(message) {
+  const payload = isObject(message?.payload) ? message.payload : {};
+  if (message.kind !== "COMMAND_RESULT" || payload.status !== "verified" || payload.command !== "POWER" || payload.active !== true) return;
+  try { globalThis.localStorage?.removeItem(POWER_OFF_CHECKPOINT_KEY); } catch { /* cleanup is best effort */ }
+}
+
+function commandError(message) {
+  const payload = isObject(message?.payload) ? message.payload : {};
+  const reason = payload.reason ?? payload.gate_reason ?? payload.message_key ?? payload.code ?? "worker_error";
+  return Object.assign(new Error(String(reason)), {
+    code: payload.code ?? "worker_error",
+    reason: payload.reason ?? payload.gate_reason ?? null,
+    message_key: payload.message_key ?? null,
+    response: message,
+  });
+}
+
 export class WorkerClient {
   constructor({ worker = null, workerFactory = null, contextId = CONTEXT_ID, sessionId = null, timeoutMs = 10000, maxPending = 64 } = {}) {
     this.contextId = contextId;
@@ -32,6 +64,9 @@ export class WorkerClient {
   }
 
   #receive(message) {
+    const persistence = persistPowerOffCheckpoint(message);
+    if (persistence && isObject(message?.payload)) message.payload.recovery_persistence = persistence;
+    clearPowerOffCheckpoint(message);
     this.#emit(message);
     if (!isObject(message)) return;
     const operationId = message.operation_id ?? message.payload?.operation_id;
@@ -41,9 +76,7 @@ export class WorkerClient {
     this.pending.delete(operationId ?? `seq:${message.seq}`);
     if (operationId) this.completed.set(operationId, message);
     if (message.kind === "ERROR" || message.payload?.status === "error" || message.payload?.status === "blocked") {
-      const error = new Error(message.payload?.message_key ?? message.payload?.code ?? "worker_error");
-      error.response = message;
-      pending.reject(error);
+      pending.reject(commandError(message));
     } else pending.resolve(message);
   }
 
@@ -68,7 +101,7 @@ export class WorkerClient {
       seq,
       kind,
       ...(operationId ? { operation_id: operationId } : {}),
-      payload,
+      payload: kind === "LOAD_WORKSPACE" ? attachPowerOffCheckpoint(payload) : payload,
     };
     let resolvePromise;
     let rejectPromise;