@happyvertical/files

Unified filesystem interface for the HAVE SDK. Provides a consistent API across local filesystem (Node.js fs/promises) and Google Drive, with rate-limited fetch utilities and legacy compatibility helpers.

Installation

pnpm add @happyvertical/files

Published to public npm. Depends on @happyvertical/utils.

Usage

Factory Function

import { getFilesystem } from '@happyvertical/files';

// Local filesystem (default)
const fs = await getFilesystem({ type: 'local', basePath: '/app/data' });

await fs.write('output/result.txt', 'Hello, world!');
const content = await fs.read('config.json');
const exists = await fs.exists('config.json');

// List files with filtering
const files = await fs.list('.', { filter: /\.json$/, detailed: true });
for (const file of files) {
  console.log(`${file.name}: ${file.size} bytes, ${file.mimeType}`);
}

Google Drive

import { getFilesystem } from '@happyvertical/files';

const fs = await getFilesystem({
  type: 'gdrive',
  clientId: 'xxx',
  clientSecret: 'yyy',
  refreshToken: 'zzz',
});

await fs.write('documents/readme.txt', 'Hello from Drive');
const content = await fs.read('documents/readme.txt');

Supports OAuth2, service account keys, and short-lived access tokens. Google Docs native formats are automatically exported (Docs → text, Sheets → CSV, etc.).

File Operations

await fs.copy('source.txt', 'backup/source-copy.txt');
await fs.move('temp.txt', 'archive/temp.txt');
await fs.createDirectory('secure-data', { mode: 0o700 });
await fs.delete('temporary-file.txt');

const stats = await fs.getStats('document.pdf');
console.log(`${stats.size} bytes, modified ${stats.mtime}`);

Fetch Utilities

Rate-limited HTTP fetch helpers for downloading remote content:

import { fetchText, fetchJSON, fetchBuffer, fetchToFile, addRateLimit } from '@happyvertical/files';

// Set per-domain rate limits
addRateLimit('api.github.com', 30, 60000);

const html = await fetchText('https://example.com');
const data = await fetchJSON('https://api.example.com/data');
const buf = await fetchBuffer('https://example.com/image.png');
await fetchToFile('https://example.com/file.zip', './downloads/file.zip');

Error Handling

import { FileNotFoundError, PermissionError, DirectoryNotEmptyError } from '@happyvertical/files';

try {
  await fs.read('missing.txt');
} catch (error) {
  if (error instanceof FileNotFoundError) {
    console.error('Not found:', error.path);
  } else if (error instanceof PermissionError) {
    console.error('Permission denied:', error.path);
  }
}

Legacy Functions

Standalone functions from the original API, still exported for backward compatibility:

import { isFile, isDirectory, ensureDirectoryExists, download, listFiles } from '@happyvertical/files';

const fileStats = isFile('/path/to/file.txt'); // synchronous
const isDir = isDirectory('/path/to/dir');     // synchronous
await ensureDirectoryExists('/path/to/new/dir');
await download('https://example.com/file.pdf', './file.pdf');
const files = await listFiles('/path/to/dir', { match: /\.json$/ });

Providers

| Provider | Status | Options | |----------|--------|---------| | Local | Implemented | basePath? | | Google Drive | Implemented | clientId, clientSecret, refreshToken (or serviceAccountKey / accessToken) | | S3 | Types only | region, bucket, accessKeyId?, secretAccessKey? | | WebDAV | Types only | baseUrl, username, password |

API Overview

Factory: getFilesystem(options), registerProvider(type, factory), getAvailableProviders(), isProviderAvailable(type), getProviderInfo(type)

Provider classes: LocalFilesystemProvider, GoogleDriveProvider

Interface methods: exists, read, write, delete, copy, move, createDirectory, list, getStats, getMimeType, upload, download, downloadWithCache, cache.get/set/clear, getCapabilities

Fetch: fetchText, fetchJSON, fetchBuffer, fetchToFile, addRateLimit, getRateLimit

Errors: FilesystemError, FileNotFoundError, PermissionError, DirectoryNotEmptyError, InvalidPathError

Legacy: isFile, isDirectory, ensureDirectoryExists, download, upload, downloadFileWithCache, listFiles, getCached, setCached, getMimeType

Dependencies

• @happyvertical/utils — temp directory management
• googleapis / google-auth-library — Google Drive provider