[Init] Initial commit - NetMesh terminal manager

application/state/pluginRuntimeStatusCache.ts

@@ -0,0 +1,39 @@
+type PluginRuntimeBridge = Pick<NetcattyBridge, "getPluginRuntimeStatus">;
+
+interface StatusCacheEntry {
+  value?: NetcattyPluginRuntimeStatus;
+  pending?: Promise<NetcattyPluginRuntimeStatus>;
+}
+
+let statusByBridge = new WeakMap<object, StatusCacheEntry>();
+
+export async function getSharedPluginRuntimeStatus(
+  bridge: PluginRuntimeBridge,
+): Promise<NetcattyPluginRuntimeStatus> {
+  const key = bridge as object;
+  let entry = statusByBridge.get(key);
+  if (!entry) {
+    entry = {};
+    statusByBridge.set(key, entry);
+  }
+  if (entry.value) return entry.value;
+  if (entry.pending) return entry.pending;
+
+  const pending = bridge.getPluginRuntimeStatus!().then((status) => {
+    entry!.value = status;
+    return status;
+  }).finally(() => {
+    if (entry?.pending === pending) entry.pending = undefined;
+  });
+  entry.pending = pending;
+  return pending;
+}
+
+export function invalidateSharedPluginRuntimeStatus(bridge: object): void {
+  const entry = statusByBridge.get(bridge);
+  if (entry) entry.value = undefined;
+}
+
+export function _resetSharedPluginRuntimeStatusForTests(): void {
+  statusByBridge = new WeakMap();
+}