From caad79ef7807bbd8f53b0338e23d281c5c45519b Mon Sep 17 00:00:00 2001
From: nasa <htilcs1115@gmail.com>
Date: Thu, 8 Jun 2023 23:47:12 +0900
Subject: 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
---
 ext/node/polyfills/internal/fs/handle.ts | 63 +++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 2 deletions(-)

(limited to 'ext/node')

diff --git a/ext/node/polyfills/internal/fs/handle.ts b/ext/node/polyfills/internal/fs/handle.ts
index 199457787..fbe535840 100644
--- a/ext/node/polyfills/internal/fs/handle.ts
+++ b/ext/node/polyfills/internal/fs/handle.ts
@@ -1,8 +1,7 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 import { EventEmitter } from "ext:deno_node/events.ts";
 import { Buffer } from "ext:deno_node/buffer.ts";
-import { promises, read } from "ext:deno_node/fs.ts";
-import type { Buffer } from "ext:deno_node/buffer.ts";
+import { promises, read, write } from "ext:deno_node/fs.ts";
 import {
   BinaryOptionsArgument,
   FileOptionsArgument,
@@ -10,6 +9,11 @@ import {
   TextOptionsArgument,
 } from "ext:deno_node/_fs/_fs_common.ts";
 
+interface WriteResult {
+  bytesWritten: number;
+  buffer: Buffer | string;
+}
+
 interface ReadResult {
   bytesRead: number;
   buffer: Buffer;
@@ -69,6 +73,61 @@ export class FileHandle extends EventEmitter {
     return promises.readFile(this, opt);
   }
 
+  write(
+    buffer: Buffer,
+    offset: number,
+    length: number,
+    position: number,
+  ): Promise<WriteResult>;
+  write(
+    str: string,
+    position: number,
+    encoding: string,
+  ): Promise<WriteResult>;
+  write(
+    bufferOrStr: Buffer | string,
+    offsetOrPotition: number,
+    lengthOrEncoding: number | string,
+    position?: number,
+  ): Promise<WriteResult> {
+    if (bufferOrStr instanceof Buffer) {
+      const buffer = bufferOrStr;
+      const offset = offsetOrPotition;
+      const length = lengthOrEncoding;
+
+      return new Promise((resolve, reject) => {
+        write(
+          this.fd,
+          buffer,
+          offset,
+          length,
+          position,
+          (err, bytesWritten, buffer) => {
+            if (err) reject(err);
+            else resolve({ buffer, bytesWritten });
+          },
+        );
+      });
+    } else {
+      const str = bufferOrStr;
+      const position = offsetOrPotition;
+      const encoding = lengthOrEncoding;
+
+      return new Promise((resolve, reject) => {
+        write(
+          this.fd,
+          str,
+          position,
+          encoding,
+          (err, bytesWritten, buffer) => {
+            if (err) reject(err);
+            else resolve({ buffer, bytesWritten });
+          },
+        );
+      });
+    }
+  }
+
   close(): Promise<void> {
     // Note that Deno.close is not async
     return Promise.resolve(Deno.close(this.fd));
-- 
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