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Diffstat (limited to 'std/node/_stream/transform.ts')
-rw-r--r-- | std/node/_stream/transform.ts | 132 |
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; - } - }); - }; -} |