yaak-mountain-loop/apps/yaak-proxy/hooks/useActionMetadata.ts

import type { ActionInvocation, ActionMetadata } from "@yaakapp-internal/proxy-lib";
import { useEffect, useState } from "react";
import { rpc } from "../lib/rpc";

/** Look up metadata for a specific action invocation. */
// oxlint-disable-next-line no-redundant-type-constituents -- ActionMetadata resolves at runtime
export function useActionMetadata(action: ActionInvocation): ActionMetadata | null {
  // oxlint-disable-next-line no-redundant-type-constituents -- ActionMetadata resolves at runtime
  const [meta, setMeta] = useState<ActionMetadata | null>(null);

  useEffect(() => {
    void getActions().then((actions) => {
      const match = actions.find(
        ([inv]) => inv.scope === action.scope && inv.action === action.action,
      );
      setMeta(match?.[1] ?? null);
    });
  }, [action]);

  return meta;
}

let cachedActions: [ActionInvocation, ActionMetadata][] | null = null;

/** Fetch and cache all action metadata. */
async function getActions(): Promise<[ActionInvocation, ActionMetadata][]> {
  if (!cachedActions) {
    const { actions } = await rpc("list_actions", {});
    cachedActions = actions;
  }
  return cachedActions;
}