use-delete-file.ts

Overview

The use-delete-file.ts file defines a custom React hook named useHandleDeleteFile. This hook provides a reusable and encapsulated way to delete one or multiple files within the application. It leverages other hooks (useDeleteFile and useGetFolderId) to perform the deletion operation in the context of a specific folder.

This file abstracts the complexity of file deletion by exposing a single method handleRemoveFile that accepts an array of file IDs to be deleted. It is designed to be used in React functional components where file deletion functionality is needed.

Detailed Explanation

Imports

• useDeleteFile from @/hooks/use-file-request
  A hook that provides the deleteFile method to perform the file deletion API request.

• useCallback from react
  A React hook to memoize the callback function to prevent unnecessary recreations.

• useGetFolderId from a local './hooks' module
  A hook to retrieve the current folder's ID, providing context for the deletion.

useHandleDeleteFile Hook

export const useHandleDeleteFile = () => {
  const { deleteFile: removeDocument } = useDeleteFile();
  const parentId = useGetFolderId();

  const handleRemoveFile = useCallback(
    async (fileIds: string[]) => {
      const code = await removeDocument({ fileIds, parentId });

      return code;
    },
    [parentId, removeDocument],
  );

  return { handleRemoveFile };
};

Purpose

Provides a memoized handler function to delete files by their IDs within a specific folder context.

Returns

• handleRemoveFile:
  An asynchronous function that accepts an array of file IDs (string[]) and deletes those files.

Parameters of handleRemoveFile

• fileIds: string[] — An array of file identifier strings representing the files to be deleted.

Return Value of handleRemoveFile

• Returns a Promise resolving to a code value which likely represents the status or result code of the deletion operation. (The exact meaning of code depends on the implementation of removeDocument.)

Usage Example

import React from 'react';
import { useHandleDeleteFile } from './use-delete-file';

const FileList = ({ files }) => {
  const { handleRemoveFile } = useHandleDeleteFile();

  const onDelete = async () => {
    const fileIdsToDelete = files.map(file => file.id);
    const resultCode = await handleRemoveFile(fileIdsToDelete);

    if (resultCode === 200) {
      alert('Files deleted successfully');
    } else {
      alert('Failed to delete files');
    }
  };

  return (
    <>
      {/* UI rendering files */}
      <button onClick={onDelete}>Delete Selected Files</button>
    </>
  );
};

Important Implementation Details

• Memoization with useCallback:
  The deletion handler is memoized with dependencies on parentId and removeDocument. This ensures the function identity remains stable across renders unless these dependencies change, which optimizes performance especially when passed down to child components.

• Context Awareness via Folder ID:
  The hook obtains the current folder ID with useGetFolderId and passes it along with the file IDs to the delete request. This suggests the deletion API requires folder context, possibly to ensure deletion occurs within the correct directory or namespace.

• Delegation to useDeleteFile:
  The actual delete operation is abstracted away into useDeleteFile, promoting separation of concerns and reusability of the file request logic.

Interaction with Other System Parts

• useDeleteFile Hook
  This hook is responsible for making the actual API call or mutation to delete files on the backend. useHandleDeleteFile depends on it to perform the deletion.

• useGetFolderId Hook
  Provides the current folder's identifier, ensuring deletions are contextually accurate.

• React Components
  Components that require file deletion capabilities will import and use useHandleDeleteFile to get access to the handleRemoveFile function.

• Backend API (implied)
  The deletion operation likely corresponds to an API endpoint that accepts file IDs and a folder ID to process deletion requests.

Visual Diagram

The diagram below illustrates the structure and relationships of this file’s main hook and its dependencies.

flowchart TD
    A[useHandleDeleteFile Hook]
    B[useDeleteFile Hook]
    C[useGetFolderId Hook]
    D[handleRemoveFile function]

    A --> B
    A --> C
    A --> D
    D --> B
    D --> C

Explanation:

• useHandleDeleteFile depends on both useDeleteFile and useGetFolderId.

• It exposes handleRemoveFile which internally calls the delete method from useDeleteFile with the folder ID obtained from useGetFolderId.

Summary

• The use-delete-file.ts file provides an encapsulated React hook, useHandleDeleteFile, for deleting files.

• It cleanly separates concerns by using other hooks to get folder context and perform the API request.

• The main exported function, handleRemoveFile, is an async method accepting an array of file IDs and returning a status code.

• This modular design aids in maintainability and reusability across the application.

If you need further details on the internal workings of useDeleteFile or useGetFolderId, please refer to their respective modules.