1  import useSWR from 'swr';
 2  import { fetchBlockById, type MemoryBlock } from '@/utils/blocks';
 3  
 4  /**
 5   * Hook for fetching a single MemoryBlock by ID
 6   * @param id - The ID of the block to fetch
 7   * @param branch - Optional branch name to fetch block from (defaults to 'main')
 8   * @param namespace - Optional namespace to filter blocks (defaults to 'legacy')
 9   */
10  export function useBlock(id: string | null, branch?: string, namespace?: string) {
11      const key = id ? ['block', id, branch, namespace] : null;
12      const { data, error, isLoading, mutate } = useSWR(
13          key,
14          () => id ? fetchBlockById(id, branch, namespace) : null
15      );
16  
17      return {
18          block: data as MemoryBlock | undefined,
19          isLoading,
20          isError: error,
21          mutate
22      };
23  }