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import * as util from '../node/util';
import { Buffer } from '../internal/buffer';
import { FsPromises } from '../node/FsPromises';
import { pathToLocation, testDirectoryIsWritable } from './util';
import { ERRSTR, MODE } from '../node/constants';
import { strToEncoding } from '../encoding';
import { FsaToNodeConstants } from './constants';
import { FsaNodeDirent } from './FsaNodeDirent';
import { AMODE } from '../consts/AMODE';
import { constants } from '../constants';
import { FsaNodeStats } from './FsaNodeStats';
import queueMicrotask from '../queueMicrotask';
import { FsSynchronousApi } from '../node/types/FsSynchronousApi';
import { FsaNodeWriteStream } from './FsaNodeWriteStream';
import { FsaNodeReadStream } from './FsaNodeReadStream';
import { FsaNodeCore } from './FsaNodeCore';
import { FileHandle } from '../node/FileHandle';
import type { FsCallbackApi, FsPromisesApi } from '../node/types';
import type * as misc from '../node/types/misc';
import type * as opts from '../node/types/options';
import type * as fsa from '../fsa/types';
import type { FsCommonObjects } from '../node/types/FsCommonObjects';
import type { WritevCallback } from '../node/types/FsCallbackApi';
const notSupported: (...args: any[]) => any = () => {
throw new Error('Method not supported by the File System Access API.');
};
const notImplemented: (...args: any[]) => any = () => {
throw new Error('Not implemented');
};
const noop: (...args: any[]) => any = () => {};
/**
* Constructs a Node.js `fs` API from a File System Access API
* [`FileSystemDirectoryHandle` object](https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryHandle).
*/
export class FsaNodeFs extends FsaNodeCore implements FsCallbackApi, FsSynchronousApi, FsCommonObjects {
// ------------------------------------------------------------ FsPromisesApi
public readonly promises: FsPromisesApi = new FsPromises(this, FileHandle);
// ------------------------------------------------------------ FsCallbackApi
public readonly open: FsCallbackApi['open'] = (
path: misc.PathLike,
flags: misc.TFlags,
a?: misc.TMode | misc.TCallback<number>,
b?: misc.TCallback<number> | string,
) => {
let mode: misc.TMode = a as misc.TMode;
let callback: misc.TCallback<number> = b as misc.TCallback<number>;
if (typeof a === 'function') {
mode = MODE.DEFAULT;
callback = a;
}
mode = mode || MODE.DEFAULT;
const modeNum = util.modeToNumber(mode);
const filename = util.pathToFilename(path);
const flagsNum = util.flagsToNumber(flags);
this.__open(filename, flagsNum, modeNum).then(
openFile => callback(null, openFile.fd),
error => callback(error),
);
};
public readonly close: FsCallbackApi['close'] = (fd: number, callback: misc.TCallback<void>): void => {
util.validateFd(fd);
this.__close(fd).then(
() => callback(null),
error => callback(error),
);
};
public readonly read: FsCallbackApi['read'] = (
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number,
callback: (err?: Error | null, bytesRead?: number, buffer?: Buffer | ArrayBufferView | DataView) => void,
): void => {
util.validateCallback(callback);
// This `if` branch is from Node.js
Iif (length === 0) {
return queueMicrotask(() => {
Iif (callback) callback(null, 0, buffer);
});
}
(async () => {
const openFile = await this.getFileByFd(fd, 'read');
const file = await openFile.file.getFile();
const src = await file.arrayBuffer();
const slice = new Uint8Array(src, Number(position), Number(length));
const dest = new Uint8Array(buffer.buffer, buffer.byteOffset + offset, slice.length);
dest.set(slice, 0);
return slice.length;
})().then(
bytesWritten => callback(null, bytesWritten, buffer),
error => callback(error),
);
};
public readonly readFile: FsCallbackApi['readFile'] = (
id: misc.TFileId,
a?: opts.IReadFileOptions | string | misc.TCallback<misc.TDataOut>,
b?: misc.TCallback<misc.TDataOut>,
) => {
const [opts, callback] = optHelpers.optsAndCbGenerator<opts.IReadFileOptions, misc.TDataOut>(
optHelpers.getReadFileOptions,
)(a, b);
const flagsNum = util.flagsToNumber(opts.flag);
(async () => {
let fd: number = typeof id === 'number' ? id : -1;
const originalFd = fd;
try {
if (fd === -1) {
const filename = util.pathToFilename(id as misc.PathLike);
fd = (await this.__open(filename, flagsNum, 0)).fd;
}
const handle = await this.__getFileById(fd, 'readFile');
const file = await handle.getFile();
const buffer = Buffer.from(await file.arrayBuffer());
return util.bufferToEncoding(buffer, opts.encoding);
} finally {
try {
const idWasFd = typeof originalFd === 'number' && originalFd >= 0;
if (idWasFd) await this.__close(originalFd);
} catch {}
}
})()
.then(data => callback(null, data))
.catch(error => callback(error));
};
public readonly write: FsCallbackApi['write'] = (
fd: number,
a?: unknown,
b?: unknown,
c?: unknown,
d?: unknown,
e?: unknown,
) => {
const [, asStr, buf, offset, length, position, cb] = util.getWriteArgs(fd, a, b, c, d, e);
(async () => {
const openFile = await this.getFileByFd(fd, 'write');
const data = buf.subarray(offset, offset + length);
await openFile.write(data, position);
return length;
})().then(
bytesWritten => cb(null, bytesWritten, asStr ? a : buf),
error => cb(error),
);
};
public readonly writev: FsCallbackApi['writev'] = (
fd: number,
buffers: ArrayBufferView[],
a: number | null | WritevCallback,
b?: WritevCallback,
): void => {
util.validateFd(fd);
let position: number | null = null;
let callback: WritevCallback;
if (typeof a === 'function') {
callback = a;
} else E{
position = Number(a);
callback = <WritevCallback>b;
}
util.validateCallback(callback);
(async () => {
const openFile = await this.getFileByFd(fd, 'writev');
const length = buffers.length;
let bytesWritten = 0;
for (let i = 0; i < length; i++) {
const data = buffers[i];
await openFile.write(data, position);
bytesWritten += data.byteLength;
position = null;
}
return bytesWritten;
})().then(
bytesWritten => callback(null, bytesWritten, buffers),
error => callback(error),
);
};
public readonly writeFile: FsCallbackApi['writeFile'] = (
id: misc.TFileId,
data: misc.TData,
a: misc.TCallback<void> | opts.IWriteFileOptions | string,
b?: misc.TCallback<void>,
): void => {
let options: opts.IWriteFileOptions | string = a as opts.IWriteFileOptions;
let callback: misc.TCallback<void> | undefined = b;
if (typeof a === 'function') {
options = optHelpers.writeFileDefaults;
callback = a;
}
const cb = util.validateCallback(callback);
const opts = optHelpers.getWriteFileOptions(options);
const flagsNum = util.flagsToNumber(opts.flag);
const modeNum = util.modeToNumber(opts.mode);
const buf = util.dataToBuffer(data, opts.encoding);
(async () => {
let fd: number = typeof id === 'number' ? id : -1;
const originalFd = fd;
try {
if (fd === -1) {
const filename = util.pathToFilename(id as misc.PathLike);
fd = (await this.__open(filename, flagsNum, modeNum)).fd;
}
const file = await this.__getFileById(fd, 'writeFile');
const writable = await file.createWritable({ keepExistingData: false });
await writable.write(buf);
await writable.close();
} finally {
try {
const idWasFd = typeof originalFd === 'number' && originalFd >= 0;
Iif (idWasFd) await this.__close(originalFd);
} catch {}
}
})().then(
() => cb(null),
error => cb(error),
);
};
public readonly copyFile: FsCallbackApi['copyFile'] = (src: misc.PathLike, dest: misc.PathLike, a, b?): void => {
const srcFilename = util.pathToFilename(src);
const destFilename = util.pathToFilename(dest);
let flags: misc.TFlagsCopy;
let callback: misc.TCallback<void>;
if (typeof a === 'function') {
flags = 0;
callback = a;
} else {
flags = a;
callback = b;
}
util.validateCallback(callback);
const [oldFolder, oldName] = pathToLocation(srcFilename);
const [newFolder, newName] = pathToLocation(destFilename);
(async () => {
const oldFile = await this.getFile(oldFolder, oldName, 'copyFile');
const newDir = await this.getDir(newFolder, false, 'copyFile');
const newFile = await newDir.getFileHandle(newName, { create: true });
const writable = await newFile.createWritable({ keepExistingData: false });
const oldData = await oldFile.getFile();
await writable.write(await oldData.arrayBuffer());
await writable.close();
})().then(
() => callback(null),
error => callback(error),
);
};
/**
* @todo There is a proposal for native "self remove" operation.
* @see https://github.com/whatwg/fs/blob/main/proposals/Remove.md
*/
public readonly unlink: FsCallbackApi['unlink'] = (path: misc.PathLike, callback: misc.TCallback<void>): void => {
const filename = util.pathToFilename(path);
const [folder, name] = pathToLocation(filename);
this.getDir(folder, false, 'unlink')
.then(dir => dir.removeEntry(name))
.then(
() => callback(null),
error => {
if (error && typeof error === 'object') {
switch (error.name) {
case 'NotFoundError': {
callback(util.createError('ENOENT', 'unlink', filename));
return;
}
case 'InvalidModificationError': {
callback(util.createError('EISDIR', 'unlink', filename));
return;
}
}
}
callback(error);
},
);
};
public readonly realpath: FsCallbackApi['realpath'] = (
path: misc.PathLike,
a: misc.TCallback<misc.TDataOut> | opts.IRealpathOptions | string,
b?: misc.TCallback<misc.TDataOut>,
): void => {
const [opts, callback] = optHelpers.getRealpathOptsAndCb(a, b);
let pathFilename = util.pathToFilename(path);
if (pathFilename[0] !== FsaToNodeConstants.Separator) pathFilename = FsaToNodeConstants.Separator + pathFilename;
callback(null, strToEncoding(pathFilename, opts.encoding));
};
public readonly stat: FsCallbackApi['stat'] = (
path: misc.PathLike,
a: misc.TCallback<misc.IStats> | opts.IStatOptions,
b?: misc.TCallback<misc.IStats>,
): void => {
const [{ bigint = false, throwIfNoEntry = true }, callback] = optHelpers.getStatOptsAndCb(a, b);
const filename = util.pathToFilename(path);
const [folder, name] = pathToLocation(filename);
(async () => {
const handle = await this.getFileOrDir(folder, name, 'stat');
return await this.getHandleStats(bigint, handle);
})().then(
stats => callback(null, stats),
error => callback(error),
);
};
public readonly lstat: FsCallbackApi['lstat'] = this.stat;
public readonly fstat: FsCallbackApi['fstat'] = (
fd: number,
a: misc.TCallback<misc.IStats> | opts.IStatOptions,
b?: misc.TCallback<misc.IStats>,
): void => {
const [{ bigint = false, throwIfNoEntry = true }, callback] = optHelpers.getStatOptsAndCb(a, b);
(async () => {
const openFile = await this.getFileByFd(fd, 'fstat');
return await this.getHandleStats(bigint, openFile.file);
})().then(
stats => callback(null, stats),
error => callback(error),
);
};
private async getHandleStats(bigint: boolean, handle: fsa.IFileSystemHandle): Promise<misc.IStats> {
let size: number = 0;
if (handle.kind === 'file') {
const file = <fsa.IFileSystemFileHandle>handle;
const fileData = await file.getFile();
size = fileData.size;
}
const stats = new FsaNodeStats(bigint, bigint ? BigInt(size) : size, handle.kind);
return stats;
}
/**
* @todo There is a proposal for native move support.
* @see https://github.com/whatwg/fs/blob/main/proposals/MovingNonOpfsFiles.md
*/
public readonly rename: FsCallbackApi['rename'] = (
oldPath: misc.PathLike,
newPath: misc.PathLike,
callback: misc.TCallback<void>,
): void => {
const oldPathFilename = util.pathToFilename(oldPath);
const newPathFilename = util.pathToFilename(newPath);
const [oldFolder, oldName] = pathToLocation(oldPathFilename);
const [newFolder, newName] = pathToLocation(newPathFilename);
(async () => {
const oldFile = await this.getFile(oldFolder, oldName, 'rename');
const newDir = await this.getDir(newFolder, false, 'rename');
const newFile = await newDir.getFileHandle(newName, { create: true });
const writable = await newFile.createWritable({ keepExistingData: false });
const oldData = await oldFile.getFile();
await writable.write(await oldData.arrayBuffer());
await writable.close();
const oldDir = await this.getDir(oldFolder, false, 'rename');
await oldDir.removeEntry(oldName);
})().then(
() => callback(null),
error => callback(error),
);
};
public readonly exists: FsCallbackApi['exists'] = (
path: misc.PathLike,
callback: (exists: boolean) => void,
): void => {
const filename = util.pathToFilename(path);
Iif (typeof callback !== 'function') throw Error(ERRSTR.CB);
this.access(path, AMODE.F_OK, error => callback(!error));
};
public readonly access: FsCallbackApi['access'] = (
path: misc.PathLike,
a: misc.TCallback<void> | number,
b?: misc.TCallback<void>,
) => {
let mode: number = AMODE.F_OK;
let callback: misc.TCallback<void>;
if (typeof a !== 'function') {
mode = a | 0; // cast to number
callback = util.validateCallback(b);
} else E{
callback = a;
}
const filename = util.pathToFilename(path);
const [folder, name] = pathToLocation(filename);
(async () => {
const node = folder.length || name ? await this.getFileOrDir(folder, name, 'access') : await this.root;
const checkIfCanExecute = mode & AMODE.X_OK;
if (checkIfCanExecute) throw util.createError('EACCESS', 'access', filename);
const checkIfCanWrite = mode & AMODE.W_OK;
switch (node.kind) {
case 'file': {
if (checkIfCanWrite) {
try {
const file = node as fsa.IFileSystemFileHandle;
const writable = await file.createWritable();
await writable.close();
} catch {
throw util.createError('EACCESS', 'access', filename);
}
}
break;
}
case 'directory': {
if (checkIfCanWrite) {
const dir = node as fsa.IFileSystemDirectoryHandle;
const canWrite = await testDirectoryIsWritable(dir);
if (!canWrite) throw util.createError('EACCESS', 'access', filename);
}
break;
}
default: {
throw util.createError('EACCESS', 'access', filename);
}
}
})().then(
() => callback(null),
error => callback(error),
);
};
public readonly appendFile: FsCallbackApi['appendFile'] = (id: misc.TFileId, data: misc.TData, a, b?) => {
const [opts, callback] = optHelpers.getAppendFileOptsAndCb(a, b);
const buffer = util.dataToBuffer(data, opts.encoding);
this.getFileByIdOrCreate(id, 'appendFile')
.then(file =>
(async () => {
const blob = await file.getFile();
const writable = await file.createWritable({ keepExistingData: true });
await writable.write({
type: 'write',
data: buffer,
position: blob.size,
});
await writable.close();
})(),
)
.then(
() => callback(null),
error => callback(error),
);
};
public readonly readdir: FsCallbackApi['readdir'] = (path: misc.PathLike, a?, b?) => {
const [options, callback] = optHelpers.getReaddirOptsAndCb(a, b);
const filename = util.pathToFilename(path);
const [folder, name] = pathToLocation(filename);
Iif (name) folder.push(name);
this.getDir(folder, false, 'readdir')
.then(dir =>
(async () => {
if (options.withFileTypes) {
const list: misc.IDirent[] = [];
for await (const [name, handle] of dir.entries()) {
const dirent = new FsaNodeDirent(name, handle.kind);
list.push(dirent);
}
if (!util.isWin && options.encoding !== 'buffer')
list.sort((a, b) => {
Iif (a.name < b.name) return -1;
if (a.name > b.name) return 1;
return 0;
});
return list;
} else {
const list: string[] = [];
for await (const key of dir.keys()) list.push(key);
if (!util.isWin && options.encoding !== 'buffer') list.sort();
return list;
}
})(),
)
.then(
res => callback(null, res),
err => callback(err),
);
};
public readonly readlink: FsCallbackApi['readlink'] = (
path: misc.PathLike,
a: misc.TCallback<misc.TDataOut> | opts.IOptions,
b?: misc.TCallback<misc.TDataOut>,
) => {
const [opts, callback] = optHelpers.getDefaultOptsAndCb(a, b);
const filename = util.pathToFilename(path);
const buffer = Buffer.from(filename);
callback(null, util.bufferToEncoding(buffer, opts.encoding));
};
/** @todo Could this use `FileSystemSyncAccessHandle.flush` through a Worker thread? */
public readonly fsync: FsCallbackApi['fsync'] = (fd: number, callback: misc.TCallback<void>): void => {
callback(null);
};
public readonly fdatasync: FsCallbackApi['fdatasync'] = (fd: number, callback: misc.TCallback<void>): void => {
callback(null);
};
public readonly ftruncate: FsCallbackApi['ftruncate'] = (
fd: number,
a: misc.TCallback<void> | number,
b?: misc.TCallback<void>,
): void => {
const len: number = typeof a === 'number' ? a : 0;
const callback: misc.TCallback<void> = util.validateCallback(typeof a === 'number' ? b : a);
this.getFileByFdAsync(fd)
.then(file => file.file.createWritable({ keepExistingData: true }))
.then(writable => writable.truncate(len).then(() => writable.close()))
.then(
() => callback(null),
error => callback(error),
);
};
public readonly truncate: FsCallbackApi['truncate'] = (
path: misc.PathLike,
a: misc.TCallback<void> | number,
b?: misc.TCallback<void>,
) => {
const len: number = typeof a === 'number' ? a : 0;
const callback: misc.TCallback<void> = util.validateCallback(typeof a === 'number' ? b : a);
this.open(path, 'r+', (error, fd) => {
Iif (error) callback(error);
else {
this.ftruncate(fd!, len, error => {
Iif (error) this.close(fd!, () => callback(error));
else this.close(fd!, callback);
});
}
});
};
public readonly futimes: FsCallbackApi['futimes'] = (
fd: number,
atime: misc.TTime,
mtime: misc.TTime,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly utimes: FsCallbackApi['utimes'] = (
path: misc.PathLike,
atime: misc.TTime,
mtime: misc.TTime,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly mkdir: FsCallbackApi['mkdir'] = (
path: misc.PathLike,
a: misc.TCallback<void> | misc.TMode | opts.IMkdirOptions,
b?: misc.TCallback<string> | misc.TCallback<void>,
) => {
const opts: misc.TMode | opts.IMkdirOptions = optHelpers.getMkdirOptions(a);
const callback = util.validateCallback(typeof a === 'function' ? a : b!);
// const modeNum = modeToNumber(opts.mode, 0o777);
const filename = util.pathToFilename(path);
const [folder, name] = pathToLocation(filename);
// TODO: need to throw if directory already exists
this.getDir(folder, opts.recursive ?? false)
.then(dir => dir.getDirectoryHandle(name, { create: true }))
.then(
() => callback(null),
error => {
if (error && typeof error === 'object') {
switch (error.name) {
case 'NotFoundError': {
const err = util.createError('ENOENT', 'mkdir', folder.join('/'));
callback(err);
return;
}
}
}
callback(error);
},
);
};
public readonly mkdtemp: FsCallbackApi['mkdtemp'] = (
prefix: string,
a: misc.TCallback<string> | opts.IOptions,
b?: misc.TCallback<string>,
) => {
const [{ encoding }, callback] = optHelpers.getDefaultOptsAndCb(a, b);
Iif (!prefix || typeof prefix !== 'string') throw new TypeError('filename prefix is required');
Iif (!util.nullCheck(prefix)) return;
const filename = prefix + util.genRndStr6();
this.mkdir(filename, MODE.DIR, err => {
Iif (err) callback(err);
else callback(null, strToEncoding(filename, encoding));
});
};
private rmAll(callback: (err: Error | null) => void): void {
(async () => {
const root = await this.root;
for await (const name of root.keys()) {
await root.removeEntry(name, { recursive: true });
}
})().then(
() => callback(null),
error => callback(error),
);
}
public readonly rmdir: FsCallbackApi['rmdir'] = (
path: misc.PathLike,
a: misc.TCallback<void> | opts.IRmdirOptions,
b?: misc.TCallback<void>,
) => {
const options: opts.IRmdirOptions = optHelpers.getRmdirOptions(a);
const callback: misc.TCallback<void> = util.validateCallback(typeof a === 'function' ? a : b);
const [folder, name] = pathToLocation(util.pathToFilename(path));
if (!name && options.recursive) return this.rmAll(callback);
this.getDir(folder, false, 'rmdir')
.then(dir => dir.getDirectoryHandle(name).then(() => dir))
.then(dir => dir.removeEntry(name, { recursive: options.recursive ?? false }))
.then(
() => callback(null),
error => {
if (error && typeof error === 'object') {
switch (error.name) {
case 'NotFoundError': {
const err = util.createError('ENOENT', 'rmdir', folder.join('/'));
callback(err);
return;
}
case 'InvalidModificationError': {
const err = util.createError('ENOTEMPTY', 'rmdir', folder.join('/'));
callback(err);
return;
}
}
}
callback(error);
},
);
};
public readonly rm: FsCallbackApi['rm'] = (
path: misc.PathLike,
a: misc.TCallback<void> | opts.IRmOptions,
b?: misc.TCallback<void>,
): void => {
const [options, callback] = optHelpers.getRmOptsAndCb(a, b);
const [folder, name] = pathToLocation(util.pathToFilename(path));
if (!name && options.recursive) return this.rmAll(callback);
this.getDir(folder, false, 'rmdir')
.then(dir => dir.removeEntry(name, { recursive: options.recursive ?? false }))
.then(
() => callback(null),
error => {
if (options.force) {
callback(null);
return;
}
if (error && typeof error === 'object') {
switch (error.name) {
case 'NotFoundError': {
const err = util.createError('ENOENT', 'rmdir', folder.join('/'));
callback(err);
return;
}
case 'InvalidModificationError': {
const err = util.createError('ENOTEMPTY', 'rmdir', folder.join('/'));
callback(err);
return;
}
}
}
callback(error);
},
);
};
public readonly fchmod: FsCallbackApi['fchmod'] = (
fd: number,
mode: misc.TMode,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly chmod: FsCallbackApi['chmod'] = (
path: misc.PathLike,
mode: misc.TMode,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly lchmod: FsCallbackApi['lchmod'] = (
path: misc.PathLike,
mode: misc.TMode,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly fchown: FsCallbackApi['fchown'] = (
fd: number,
uid: number,
gid: number,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly chown: FsCallbackApi['chown'] = (
path: misc.PathLike,
uid: number,
gid: number,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly lchown: FsCallbackApi['lchown'] = (
path: misc.PathLike,
uid: number,
gid: number,
callback: misc.TCallback<void>,
): void => {
callback(null);
};
public readonly createWriteStream: FsCallbackApi['createWriteStream'] = (
path: misc.PathLike,
options?: opts.IWriteStreamOptions | string,
): FsaNodeWriteStream => {
const defaults: opts.IWriteStreamOptions = {
encoding: 'utf8',
flags: 'w',
autoClose: true,
emitClose: true,
};
const optionsObj: opts.IWriteStreamOptions = optHelpers.getOptions(defaults, options);
const filename = util.pathToFilename(path);
const flags = util.flagsToNumber(optionsObj.flags ?? 'w');
const fd: number = optionsObj.fd ? (typeof optionsObj.fd === 'number' ? optionsObj.fd : optionsObj.fd.fd) : 0;
const handle = fd ? this.getFileByFdAsync(fd) : this.__open(filename, flags, 0);
const stream = new FsaNodeWriteStream(handle, filename, optionsObj);
if (optionsObj.autoClose) {
stream.once('finish', () => {
handle.then(file => this.close(file.fd, () => {}));
});
stream.once('error', () => {
handle.then(file => this.close(file.fd, () => {}));
});
}
return stream;
};
public readonly createReadStream: FsCallbackApi['createReadStream'] = (
path: misc.PathLike,
options?: opts.IReadStreamOptions | string,
): misc.IReadStream => {
const defaults: opts.IReadStreamOptions = {
flags: 'r',
fd: null,
mode: 0o666,
autoClose: true,
emitClose: true,
start: 0,
end: Infinity,
highWaterMark: 64 * 1024,
fs: null,
signal: null,
};
const optionsObj: opts.IReadStreamOptions = optHelpers.getOptions<opts.IReadStreamOptions>(defaults, options);
const filename = util.pathToFilename(path);
const flags = util.flagsToNumber(optionsObj.flags);
const fd: number = optionsObj.fd ? (typeof optionsObj.fd === 'number' ? optionsObj.fd : optionsObj.fd.fd) : 0;
const handle = fd ? this.getFileByFdAsync(fd) : this.__open(filename, flags, 0);
const stream = new FsaNodeReadStream(this, handle, filename, optionsObj);
return stream;
};
public readonly cp: FsCallbackApi['cp'] = notImplemented;
public readonly lutimes: FsCallbackApi['lutimes'] = notImplemented;
public readonly openAsBlob: FsCallbackApi['openAsBlob'] = notImplemented;
public readonly opendir: FsCallbackApi['opendir'] = notImplemented;
public readonly readv: FsCallbackApi['readv'] = notImplemented;
public readonly statfs: FsCallbackApi['statfs'] = notImplemented;
/**
* @todo Watchers could be implemented in the future on top of `FileSystemObserver`,
* which is currently a proposal.
* @see https://github.com/whatwg/fs/blob/main/proposals/FileSystemObserver.md
*/
public readonly watchFile: FsCallbackApi['watchFile'] = notSupported;
public readonly unwatchFile: FsCallbackApi['unwatchFile'] = notSupported;
public readonly watch: FsCallbackApi['watch'] = notSupported;
public readonly symlink: FsCallbackApi['symlink'] = notSupported;
public readonly link: FsCallbackApi['link'] = notSupported;
// --------------------------------------------------------- FsSynchronousApi
public readonly statSync: FsSynchronousApi['statSync'] = (
path: misc.PathLike,
options?: opts.IStatOptions,
): misc.IStats<any> => {
const { bigint = true, throwIfNoEntry = true } = optHelpers.getStatOptions(options);
const filename = util.pathToFilename(path);
const location = pathToLocation(filename);
const adapter = this.getSyncAdapter();
const res = adapter.call('stat', location);
const stats = new FsaNodeStats(bigint, res.size ?? 0, res.kind);
return stats;
};
public readonly lstatSync: FsSynchronousApi['lstatSync'] = this.statSync;
public readonly fstatSync: FsSynchronousApi['fstatSync'] = (fd: number, options?: opts.IFStatOptions) => {
const filename = this.getFileName(fd);
return this.statSync(filename, options as any) as any;
};
public readonly accessSync: FsSynchronousApi['accessSync'] = (
path: misc.PathLike,
mode: number = AMODE.F_OK,
): void => {
const filename = util.pathToFilename(path);
mode = mode | 0;
const adapter = this.getSyncAdapter();
adapter.call('access', [filename, mode]);
};
public readonly readFileSync: FsSynchronousApi['readFileSync'] = (
id: misc.TFileId,
options?: opts.IReadFileOptions | string,
): misc.TDataOut => {
const opts = optHelpers.getReadFileOptions(options);
const flagsNum = util.flagsToNumber(opts.flag);
const filename = this.getFileName(id);
const adapter = this.getSyncAdapter();
const uint8 = adapter.call('readFile', [filename, opts]);
const buffer = Buffer.from(uint8.buffer, uint8.byteOffset, uint8.byteLength);
return util.bufferToEncoding(buffer, opts.encoding);
};
public readonly writeFileSync: FsSynchronousApi['writeFileSync'] = (
id: misc.TFileId,
data: misc.TData,
options?: opts.IWriteFileOptions,
): void => {
const opts = optHelpers.getWriteFileOptions(options);
const flagsNum = util.flagsToNumber(opts.flag);
const modeNum = util.modeToNumber(opts.mode);
const buf = util.dataToBuffer(data, opts.encoding);
const filename = this.getFileName(id);
const adapter = this.getSyncAdapter();
adapter.call('writeFile', [filename, util.bufToUint8(buf), opts]);
};
public readonly appendFileSync: FsSynchronousApi['appendFileSync'] = (
id: misc.TFileId,
data: misc.TData,
options?: opts.IAppendFileOptions | string,
) => {
const opts = optHelpers.getAppendFileOpts(options);
Iif (!opts.flag || util.isFd(id)) opts.flag = 'a';
const filename = this.getFileName(id);
const buf = util.dataToBuffer(data, opts.encoding);
const adapter = this.getSyncAdapter();
adapter.call('appendFile', [filename, util.bufToUint8(buf), opts]);
};
public readonly closeSync: FsSynchronousApi['closeSync'] = (fd: number) => {
util.validateFd(fd);
const file = this.getFileByFd(fd, 'close');
file.close().catch(() => {});
this.fds.delete(fd);
this.releasedFds.push(fd);
};
public readonly existsSync: FsSynchronousApi['existsSync'] = (path: misc.PathLike): boolean => {
try {
this.statSync(path);
return true;
} catch {
return false;
}
};
public readonly copyFileSync: FsSynchronousApi['copyFileSync'] = (
src: misc.PathLike,
dest: misc.PathLike,
flags?: misc.TFlagsCopy,
): void => {
const srcFilename = util.pathToFilename(src);
const destFilename = util.pathToFilename(dest);
const adapter = this.getSyncAdapter();
adapter.call('copy', [srcFilename, destFilename, flags]);
};
public readonly renameSync: FsSynchronousApi['renameSync'] = (
oldPath: misc.PathLike,
newPath: misc.PathLike,
): void => {
const srcFilename = util.pathToFilename(oldPath);
const destFilename = util.pathToFilename(newPath);
const adapter = this.getSyncAdapter();
adapter.call('move', [srcFilename, destFilename]);
};
public readonly rmdirSync: FsSynchronousApi['rmdirSync'] = (path: misc.PathLike, opts?: opts.IRmdirOptions): void => {
const filename = util.pathToFilename(path);
const adapter = this.getSyncAdapter();
adapter.call('rmdir', [filename, opts]);
};
public readonly rmSync: FsSynchronousApi['rmSync'] = (path: misc.PathLike, options?: opts.IRmOptions): void => {
const filename = util.pathToFilename(path);
const adapter = this.getSyncAdapter();
adapter.call('rm', [filename, options]);
};
public readonly mkdirSync: FsSynchronousApi['mkdirSync'] = (
path: misc.PathLike,
options?: misc.TMode | opts.IMkdirOptions,
): string | undefined => {
const opts = optHelpers.getMkdirOptions(options);
const modeNum = util.modeToNumber(opts.mode, 0o777);
const filename = util.pathToFilename(path);
return this.getSyncAdapter().call('mkdir', [filename, options]);
};
public readonly mkdtempSync: FsSynchronousApi['mkdtempSync'] = (
prefix: string,
options?: opts.IOptions,
): misc.TDataOut => {
const { encoding } = optHelpers.getDefaultOpts(options);
Iif (!prefix || typeof prefix !== 'string') throw new TypeError('filename prefix is required');
util.nullCheck(prefix);
const result = this.getSyncAdapter().call('mkdtemp', [prefix, options]);
return strToEncoding(result, encoding);
};
public readonly readlinkSync: FsSynchronousApi['readlinkSync'] = (
path: misc.PathLike,
options?: opts.IOptions,
): misc.TDataOut => {
const opts = optHelpers.getDefaultOpts(options);
const filename = util.pathToFilename(path);
const buffer = Buffer.from(filename);
return util.bufferToEncoding(buffer, opts.encoding);
};
public readonly truncateSync: FsSynchronousApi['truncateSync'] = (id: misc.TFileId, len?: number): void => {
Iif (util.isFd(id)) return this.ftruncateSync(id as number, len);
const filename = util.pathToFilename(id as misc.PathLike);
this.getSyncAdapter().call('trunc', [filename, Number(len) || 0]);
};
public readonly ftruncateSync: FsSynchronousApi['ftruncateSync'] = (fd: number, len?: number): void => {
const filename = this.getFileName(fd);
this.truncateSync(filename, len);
};
public readonly unlinkSync: FsSynchronousApi['unlinkSync'] = (path: misc.PathLike): void => {
const filename = util.pathToFilename(path);
this.getSyncAdapter().call('unlink', [filename]);
};
public readonly readdirSync: FsSynchronousApi['readdirSync'] = (
path: misc.PathLike,
options?: opts.IReaddirOptions | string,
): misc.TDataOut[] | misc.IDirent[] => {
const opts = optHelpers.getReaddirOptions(options);
const filename = util.pathToFilename(path);
const adapter = this.getSyncAdapter();
const list = adapter.call('readdir', [filename]);
if (opts.withFileTypes) {
const res: misc.IDirent[] = [];
for (const entry of list) res.push(new FsaNodeDirent(entry.name, entry.kind));
return res;
} else {
const res: misc.TDataOut[] = [];
for (const entry of list) {
const buffer = Buffer.from(entry.name);
res.push(util.bufferToEncoding(buffer, opts.encoding));
}
return res;
}
};
public readonly realpathSync: FsSynchronousApi['realpathSync'] = (
path: misc.PathLike,
options?: opts.IRealpathOptions | string,
): misc.TDataOut => {
let filename = util.pathToFilename(path);
const { encoding } = optHelpers.getRealpathOptions(options);
if (filename[0] !== FsaToNodeConstants.Separator) filename = FsaToNodeConstants.Separator + filename;
return strToEncoding(filename, encoding);
};
public readonly readSync: FsSynchronousApi['readSync'] = (
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number,
): number => {
util.validateFd(fd);
const filename = this.getFileName(fd);
const adapter = this.getSyncAdapter();
const uint8 = adapter.call('read', [filename, position, length]);
const dest = new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength);
dest.set(uint8, offset);
return uint8.length;
};
public readonly writeSync: FsSynchronousApi['writeSync'] = (
fd: number,
a: string | Buffer | ArrayBufferView | DataView,
b?: number,
c?: number | BufferEncoding,
d?: number | null,
): number => {
const [, buf, offset, length, position] = util.getWriteSyncArgs(fd, a, b, c, d);
const filename = this.getFileName(fd);
const data = new Uint8Array(buf.buffer, buf.byteOffset + offset, length);
return this.getSyncAdapter().call('write', [filename, data, position || null]);
};
public readonly openSync: FsSynchronousApi['openSync'] = (
path: misc.PathLike,
flags: misc.TFlags,
mode: misc.TMode = MODE.DEFAULT,
): number => {
const modeNum = util.modeToNumber(mode);
const filename = util.pathToFilename(path);
const flagsNum = util.flagsToNumber(flags);
const adapter = this.getSyncAdapter();
const handle = adapter.call('open', [filename, flagsNum, modeNum]);
const openFile = this.__open2(handle, filename, flagsNum, modeNum);
return openFile.fd;
};
public readonly writevSync: FsSynchronousApi['writevSync'] = (
fd: number,
buffers: ArrayBufferView[],
position?: number | null,
): void => {
Iif (buffers.length === 0) return;
this.writeSync(fd, buffers[0], 0, buffers[0].byteLength, position);
for (let i = 1; i < buffers.length; i++) {
this.writeSync(fd, buffers[i], 0, buffers[i].byteLength, null);
}
};
public readonly fdatasyncSync: FsSynchronousApi['fdatasyncSync'] = noop;
public readonly fsyncSync: FsSynchronousApi['fsyncSync'] = noop;
public readonly chmodSync: FsSynchronousApi['chmodSync'] = noop;
public readonly chownSync: FsSynchronousApi['chownSync'] = noop;
public readonly fchmodSync: FsSynchronousApi['fchmodSync'] = noop;
public readonly fchownSync: FsSynchronousApi['fchownSync'] = noop;
public readonly futimesSync: FsSynchronousApi['futimesSync'] = noop;
public readonly lchmodSync: FsSynchronousApi['lchmodSync'] = noop;
public readonly lchownSync: FsSynchronousApi['lchownSync'] = noop;
public readonly utimesSync: FsSynchronousApi['utimesSync'] = noop;
public readonly lutimesSync: FsSynchronousApi['lutimesSync'] = noop;
public readonly cpSync: FsSynchronousApi['cpSync'] = notImplemented;
public readonly opendirSync: FsSynchronousApi['opendirSync'] = notImplemented;
public readonly statfsSync: FsSynchronousApi['statfsSync'] = notImplemented;
public readonly readvSync: FsSynchronousApi['readvSync'] = notImplemented;
public readonly symlinkSync: FsSynchronousApi['symlinkSync'] = notSupported;
public readonly linkSync: FsSynchronousApi['linkSync'] = notSupported;
// ---------------------------------------------------------- FsCommonObjects
public readonly F_OK = constants.F_OK;
public readonly R_OK = constants.R_OK;
public readonly W_OK = constants.W_OK;
public readonly X_OK = constants.X_OK;
public readonly constants = constants;
public readonly Dirent = FsaNodeDirent;
public readonly Stats = FsaNodeStats<any>;
public readonly WriteStream = FsaNodeWriteStream;
public readonly ReadStream = FsaNodeReadStream;
public readonly StatFs = 0 as any;
public readonly Dir = 0 as any;
public readonly StatsWatcher = 0 as any;
public readonly FSWatcher = 0 as any;
}
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