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-rw-r--r--std/node/_stream/transform.ts132
1 files changed, 0 insertions, 132 deletions
diff --git a/std/node/_stream/transform.ts b/std/node/_stream/transform.ts
deleted file mode 100644
index a4246e81a..000000000
--- a/std/node/_stream/transform.ts
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright Node.js contributors. All rights reserved. MIT License.
-import { Encodings } from "../_utils.ts";
-import Duplex from "./duplex.ts";
-import type { DuplexOptions } from "./duplex.ts";
-import type { writeV } from "./writable_internal.ts";
-import { ERR_METHOD_NOT_IMPLEMENTED } from "../_errors.ts";
-
-const kCallback = Symbol("kCallback");
-
-type TransformFlush = (
- this: Transform,
- // deno-lint-ignore no-explicit-any
- callback: (error?: Error | null, data?: any) => void,
-) => void;
-
-export interface TransformOptions extends DuplexOptions {
- read?(this: Transform, size: number): void;
- write?(
- this: Transform,
- // deno-lint-ignore no-explicit-any
- chunk: any,
- encoding: Encodings,
- callback: (error?: Error | null) => void,
- ): void;
- writev?: writeV;
- final?(this: Transform, callback: (error?: Error | null) => void): void;
- destroy?(
- this: Transform,
- error: Error | null,
- callback: (error: Error | null) => void,
- ): void;
- transform?(
- this: Transform,
- // deno-lint-ignore no-explicit-any
- chunk: any,
- encoding: Encodings,
- // deno-lint-ignore no-explicit-any
- callback: (error?: Error | null, data?: any) => void,
- ): void;
- flush?: TransformFlush;
-}
-
-export default class Transform extends Duplex {
- [kCallback]: null | ((error?: Error | null) => void);
- _flush?: TransformFlush;
-
- constructor(options?: TransformOptions) {
- super(options);
- this._readableState.sync = false;
-
- this[kCallback] = null;
-
- if (options) {
- if (typeof options.transform === "function") {
- this._transform = options.transform;
- }
-
- if (typeof options.flush === "function") {
- this._flush = options.flush;
- }
- }
-
- this.on("prefinish", function (this: Transform) {
- if (typeof this._flush === "function" && !this.destroyed) {
- this._flush((er, data) => {
- if (er) {
- this.destroy(er);
- return;
- }
-
- if (data != null) {
- this.push(data);
- }
- this.push(null);
- });
- } else {
- this.push(null);
- }
- });
- }
-
- _read = () => {
- if (this[kCallback]) {
- const callback = this[kCallback] as (error?: Error | null) => void;
- this[kCallback] = null;
- callback();
- }
- };
-
- _transform(
- // deno-lint-ignore no-explicit-any
- _chunk: any,
- _encoding: string,
- // deno-lint-ignore no-explicit-any
- _callback: (error?: Error | null, data?: any) => void,
- ) {
- throw new ERR_METHOD_NOT_IMPLEMENTED("_transform()");
- }
-
- _write = (
- // deno-lint-ignore no-explicit-any
- chunk: any,
- encoding: string,
- callback: (error?: Error | null) => void,
- ) => {
- const rState = this._readableState;
- const wState = this._writableState;
- const length = rState.length;
-
- this._transform(chunk, encoding, (err, val) => {
- if (err) {
- callback(err);
- return;
- }
-
- if (val != null) {
- this.push(val);
- }
-
- if (
- wState.ended || // Backwards compat.
- length === rState.length || // Backwards compat.
- rState.length < rState.highWaterMark ||
- rState.length === 0
- ) {
- callback();
- } else {
- this[kCallback] = callback;
- }
- });
- };
-}