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feat(node_compat): Add a write method to the FileHandle class (#19385)
## WHY ref: https://github.com/denoland/deno/issues/19165 The FileHandle class has many missing methods compared to node. ## WHAT Add write method
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2 changed files with 96 additions and 6 deletions
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@ -1,8 +1,7 @@
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { EventEmitter } from "ext:deno_node/events.ts";
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import { Buffer } from "ext:deno_node/buffer.ts";
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import { promises, read } from "ext:deno_node/fs.ts";
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import type { Buffer } from "ext:deno_node/buffer.ts";
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import { promises, read, write } from "ext:deno_node/fs.ts";
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import {
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BinaryOptionsArgument,
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FileOptionsArgument,
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@ -10,6 +9,11 @@ import {
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TextOptionsArgument,
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} from "ext:deno_node/_fs/_fs_common.ts";
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interface WriteResult {
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bytesWritten: number;
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buffer: Buffer | string;
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}
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interface ReadResult {
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bytesRead: number;
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buffer: Buffer;
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@ -69,6 +73,61 @@ export class FileHandle extends EventEmitter {
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return promises.readFile(this, opt);
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}
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write(
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buffer: Buffer,
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offset: number,
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length: number,
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position: number,
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): Promise<WriteResult>;
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write(
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str: string,
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position: number,
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encoding: string,
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): Promise<WriteResult>;
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write(
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bufferOrStr: Buffer | string,
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offsetOrPotition: number,
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lengthOrEncoding: number | string,
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position?: number,
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): Promise<WriteResult> {
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if (bufferOrStr instanceof Buffer) {
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const buffer = bufferOrStr;
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const offset = offsetOrPotition;
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const length = lengthOrEncoding;
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return new Promise((resolve, reject) => {
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write(
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this.fd,
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buffer,
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offset,
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length,
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position,
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(err, bytesWritten, buffer) => {
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if (err) reject(err);
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else resolve({ buffer, bytesWritten });
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},
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);
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});
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} else {
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const str = bufferOrStr;
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const position = offsetOrPotition;
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const encoding = lengthOrEncoding;
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return new Promise((resolve, reject) => {
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write(
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this.fd,
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str,
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position,
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encoding,
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(err, bytesWritten, buffer) => {
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if (err) reject(err);
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else resolve({ buffer, bytesWritten });
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},
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);
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});
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}
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}
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close(): Promise<void> {
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// Note that Deno.close is not async
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return Promise.resolve(Deno.close(this.fd));
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