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Editing: readline.d.ts

/**
 * The `readline` module provides an interface for reading data from a `Readable` stream (such as `process.stdin`) one line at a time.
 *
 * To use the promise-based APIs:
 *
 * ```js
 * import * as readline from 'node:readline/promises';
 * ```
 *
 * To use the callback and sync APIs:
 *
 * ```js
 * import * as readline from 'node:readline';
 * ```
 *
 * The following simple example illustrates the basic use of the `readline` module.
 *
 * ```js
 * import * as readline from 'node:readline/promises';
 * import { stdin as input, stdout as output } from 'node:process';
 *
 * const rl = readline.createInterface({ input, output });
 *
 * const answer = await rl.question('What do you think of Node.js? ');
 *
 * console.log(`Thank you for your valuable feedback: ${answer}`);
 *
 * rl.close();
 * ```
 *
 * Once this code is invoked, the Node.js application will not terminate until the`readline.Interface` is closed because the interface waits for data to be
 * received on the `input` stream.
 * @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/readline.js)
 */
declare module "readline" {
    import { Abortable, EventEmitter } from "node:events";
    import * as promises from "node:readline/promises";

export { promises };
    export interface Key {
        sequence?: string | undefined;
        name?: string | undefined;
        ctrl?: boolean | undefined;
        meta?: boolean | undefined;
        shift?: boolean | undefined;
    }
    /**
     * Instances of the `readline.Interface` class are constructed using the`readline.createInterface()` method. Every instance is associated with a
     * single `input` `Readable` stream and a single `output` `Writable` stream.
     * The `output` stream is used to print prompts for user input that arrives on,
     * and is read from, the `input` stream.
     * @since v0.1.104
     */
    export class Interface extends EventEmitter {
        readonly terminal: boolean;
        /**
         * The current input data being processed by node.
         *
         * This can be used when collecting input from a TTY stream to retrieve the
         * current value that has been processed thus far, prior to the `line` event
         * being emitted. Once the `line` event has been emitted, this property will
         * be an empty string.
         *
         * Be aware that modifying the value during the instance runtime may have
         * unintended consequences if `rl.cursor` is not also controlled.
         *
         * **If not using a TTY stream for input, use the `'line'` event.**
         *
         * One possible use case would be as follows:
         *
         * ```js
         * const values = ['lorem ipsum', 'dolor sit amet'];
         * const rl = readline.createInterface(process.stdin);
         * const showResults = debounce(() => {
         *   console.log(
         *     '\n',
         *     values.filter((val) => val.startsWith(rl.line)).join(' ')
         *   );
         * }, 300);
         * process.stdin.on('keypress', (c, k) => {
         *   showResults();
         * });
         * ```
         * @since v0.1.98
         */
        readonly line: string;
        /**
         * The cursor position relative to `rl.line`.
         *
         * This will track where the current cursor lands in the input string, when
         * reading input from a TTY stream. The position of cursor determines the
         * portion of the input string that will be modified as input is processed,
         * as well as the column where the terminal caret will be rendered.
         * @since v0.1.98
         */
        readonly cursor: number;
        /**
         * NOTE: According to the documentation:
         *
         * > Instances of the `readline.Interface` class are constructed using the
         * > `readline.createInterface()` method.
         *
         * @see https://nodejs.org/dist/latest-v10.x/docs/api/readline.html#readline_class_interface
         */
        protected constructor(
            input: NodeJS.ReadableStream,
            output?: NodeJS.WritableStream,
            completer?: Completer | AsyncCompleter,
            terminal?: boolean,
        );
        /**
         * NOTE: According to the documentation:
         *
         * > Instances of the `readline.Interface` class are constructed using the
         * > `readline.createInterface()` method.
         *
         * @see https://nodejs.org/dist/latest-v10.x/docs/api/readline.html#readline_class_interface
         */
        protected constructor(options: ReadLineOptions);
        /**
         * The `rl.getPrompt()` method returns the current prompt used by `rl.prompt()`.
         * @since v15.3.0
         * @return the current prompt string
         */
        getPrompt(): string;
        /**
         * The `rl.setPrompt()` method sets the prompt that will be written to `output`whenever `rl.prompt()` is called.
         * @since v0.1.98
         */
        setPrompt(prompt: string): void;
        /**
         * The `rl.prompt()` method writes the `readline.Interface` instances configured`prompt` to a new line in `output` in order to provide a user with a new
         * location at which to provide input.
         *
         * When called, `rl.prompt()` will resume the `input` stream if it has been
         * paused.
         *
         * If the `readline.Interface` was created with `output` set to `null` or`undefined` the prompt is not written.
         * @since v0.1.98
         * @param preserveCursor If `true`, prevents the cursor placement from being reset to `0`.
         */
        prompt(preserveCursor?: boolean): void;
        /**
         * The `rl.question()` method displays the `query` by writing it to the `output`,
         * waits for user input to be provided on `input`, then invokes the `callback`function passing the provided input as the first argument.
         *
         * When called, `rl.question()` will resume the `input` stream if it has been
         * paused.
         *
         * If the `readline.Interface` was created with `output` set to `null` or`undefined` the `query` is not written.
         *
         * The `callback` function passed to `rl.question()` does not follow the typical
         * pattern of accepting an `Error` object or `null` as the first argument.
         * The `callback` is called with the provided answer as the only argument.
         *
         * Example usage:
         *
         * ```js
         * rl.question('What is your favorite food? ', (answer) => {
         *   console.log(`Oh, so your favorite food is ${answer}`);
         * });
         * ```
         *
         * Using an `AbortController` to cancel a question.
         *
         * ```js
         * const ac = new AbortController();
         * const signal = ac.signal;
         *
         * rl.question('What is your favorite food? ', { signal }, (answer) => {
         *   console.log(`Oh, so your favorite food is ${answer}`);
         * });
         *
         * signal.addEventListener('abort', () => {
         *   console.log('The food question timed out');
         * }, { once: true });
         *
         * setTimeout(() => ac.abort(), 10000);
         * ```
         *
         * If this method is invoked as it's util.promisify()ed version, it returns a
         * Promise that fulfills with the answer. If the question is canceled using
         * an `AbortController` it will reject with an `AbortError`.
         *
         * ```js
         * const util = require('util');
         * const question = util.promisify(rl.question).bind(rl);
         *
         * async function questionExample() {
         *   try {
         *     const answer = await question('What is you favorite food? ');
         *     console.log(`Oh, so your favorite food is ${answer}`);
         *   } catch (err) {
         *     console.error('Question rejected', err);
         *   }
         * }
         * questionExample();
         * ```
         * @since v0.3.3
         * @param query A statement or query to write to `output`, prepended to the prompt.
         * @param callback A callback function that is invoked with the user's input in response to the `query`.
         */
        question(query: string, callback: (answer: string) => void): void;
        question(query: string, options: Abortable, callback: (answer: string) => void): void;
        /**
         * The `rl.pause()` method pauses the `input` stream, allowing it to be resumed
         * later if necessary.
         *
         * Calling `rl.pause()` does not immediately pause other events (including`'line'`) from being emitted by the `readline.Interface` instance.
         * @since v0.3.4
         */
        pause(): this;
        /**
         * The `rl.resume()` method resumes the `input` stream if it has been paused.
         * @since v0.3.4
         */
        resume(): this;
        /**
         * The `rl.close()` method closes the `readline.Interface` instance and
         * relinquishes control over the `input` and `output` streams. When called,
         * the `'close'` event will be emitted.
         *
         * Calling `rl.close()` does not immediately stop other events (including `'line'`)
         * from being emitted by the `readline.Interface` instance.
         * @since v0.1.98
         */
        close(): void;
        /**
         * The `rl.write()` method will write either `data` or a key sequence identified
         * by `key` to the `output`. The `key` argument is supported only if `output` is
         * a `TTY` text terminal. See `TTY keybindings` for a list of key
         * combinations.
         *
         * If `key` is specified, `data` is ignored.
         *
         * When called, `rl.write()` will resume the `input` stream if it has been
         * paused.
         *
         * If the `readline.Interface` was created with `output` set to `null` or`undefined` the `data` and `key` are not written.
         *
         * ```js
         * rl.write('Delete this!');
         * // Simulate Ctrl+U to delete the line written previously
         * rl.write(null, { ctrl: true, name: 'u' });
         * ```
         *
         * The `rl.write()` method will write the data to the `readline` `Interface`'s`input`_as if it were provided by the user_.
         * @since v0.1.98
         */
        write(data: string | Buffer, key?: Key): void;
        write(data: undefined | null | string | Buffer, key: Key): void;
        /**
         * Returns the real position of the cursor in relation to the input
         * prompt + string. Long input (wrapping) strings, as well as multiple
         * line prompts are included in the calculations.
         * @since v13.5.0, v12.16.0
         */
        getCursorPos(): CursorPos;
        /**
         * events.EventEmitter
         * 1. close
         * 2. line
         * 3. pause
         * 4. resume
         * 5. SIGCONT
         * 6. SIGINT
         * 7. SIGTSTP
         * 8. history
         */
        addListener(event: string, listener: (...args: any[]) => void): this;
        addListener(event: "close", listener: () => void): this;
        addListener(event: "line", listener: (input: string) => void): this;
        addListener(event: "pause", listener: () => void): this;
        addListener(event: "resume", listener: () => void): this;
        addListener(event: "SIGCONT", listener: () => void): this;
        addListener(event: "SIGINT", listener: () => void): this;
        addListener(event: "SIGTSTP", listener: () => void): this;
        addListener(event: "history", listener: (history: string[]) => void): this;
        emit(event: string | symbol, ...args: any[]): boolean;
        emit(event: "close"): boolean;
        emit(event: "line", input: string): boolean;
        emit(event: "pause"): boolean;
        emit(event: "resume"): boolean;
        emit(event: "SIGCONT"): boolean;
        emit(event: "SIGINT"): boolean;
        emit(event: "SIGTSTP"): boolean;
        emit(event: "history", history: string[]): boolean;
        on(event: string, listener: (...args: any[]) => void): this;
        on(event: "close", listener: () => void): this;
        on(event: "line", listener: (input: string) => void): this;
        on(event: "pause", listener: () => void): this;
        on(event: "resume", listener: () => void): this;
        on(event: "SIGCONT", listener: () => void): this;
        on(event: "SIGINT", listener: () => void): this;
        on(event: "SIGTSTP", listener: () => void): this;
        on(event: "history", listener: (history: string[]) => void): this;
        once(event: string, listener: (...args: any[]) => void): this;
        once(event: "close", listener: () => void): this;
        once(event: "line", listener: (input: string) => void): this;
        once(event: "pause", listener: () => void): this;
        once(event: "resume", listener: () => void): this;
        once(event: "SIGCONT", listener: () => void): this;
        once(event: "SIGINT", listener: () => void): this;
        once(event: "SIGTSTP", listener: () => void): this;
        once(event: "history", listener: (history: string[]) => void): this;
        prependListener(event: string, listener: (...args: any[]) => void): this;
        prependListener(event: "close", listener: () => void): this;
        prependListener(event: "line", listener: (input: string) => void): this;
        prependListener(event: "pause", listener: () => void): this;
        prependListener(event: "resume", listener: () => void): this;
        prependListener(event: "SIGCONT", listener: () => void): this;
        prependListener(event: "SIGINT", listener: () => void): this;
        prependListener(event: "SIGTSTP", listener: () => void): this;
        prependListener(event: "history", listener: (history: string[]) => void): this;
        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
        prependOnceListener(event: "close", listener: () => void): this;
        prependOnceListener(event: "line", listener: (input: string) => void): this;
        prependOnceListener(event: "pause", listener: () => void): this;
        prependOnceListener(event: "resume", listener: () => void): this;
        prependOnceListener(event: "SIGCONT", listener: () => void): this;
        prependOnceListener(event: "SIGINT", listener: () => void): this;
        prependOnceListener(event: "SIGTSTP", listener: () => void): this;
        prependOnceListener(event: "history", listener: (history: string[]) => void): this;
        [Symbol.asyncIterator](): AsyncIterableIterator<string>;
    }
    export type ReadLine = Interface; // type forwarded for backwards compatibility
    export type Completer = (line: string) => CompleterResult;
    export type AsyncCompleter = (
        line: string,
        callback: (err?: null | Error, result?: CompleterResult) => void,
    ) => void;
    export type CompleterResult = [string[], string];
    export interface ReadLineOptions {
        input: NodeJS.ReadableStream;
        output?: NodeJS.WritableStream | undefined;
        completer?: Completer | AsyncCompleter | undefined;
        terminal?: boolean | undefined;
        /**
         *  Initial list of history lines. This option makes sense
         * only if `terminal` is set to `true` by the user or by an internal `output`
         * check, otherwise the history caching mechanism is not initialized at all.
         * @default []
         */
        history?: string[] | undefined;
        historySize?: number | undefined;
        prompt?: string | undefined;
        crlfDelay?: number | undefined;
        /**
         * If `true`, when a new input line added
         * to the history list duplicates an older one, this removes the older line
         * from the list.
         * @default false
         */
        removeHistoryDuplicates?: boolean | undefined;
        escapeCodeTimeout?: number | undefined;
        tabSize?: number | undefined;
    }
    /**
     * The `readline.createInterface()` method creates a new `readline.Interface`instance.
     *
     * ```js
     * const readline = require('readline');
     * const rl = readline.createInterface({
     *   input: process.stdin,
     *   output: process.stdout
     * });
     * ```
     *
     * Once the `readline.Interface` instance is created, the most common case is to
     * listen for the `'line'` event:
     *
     * ```js
     * rl.on('line', (line) => {
     *   console.log(`Received: ${line}`);
     * });
     * ```
     *
     * If `terminal` is `true` for this instance then the `output` stream will get
     * the best compatibility if it defines an `output.columns` property and emits
     * a `'resize'` event on the `output` if or when the columns ever change
     * (`process.stdout` does this automatically when it is a TTY).
     *
     * When creating a `readline.Interface` using `stdin` as input, the program
     * will not terminate until it receives `EOF` (Ctrl+D on
     * Linux/macOS, Ctrl+Z followed by Return on
     * Windows).
     * If you want your application to exit without waiting for user input, you can `unref()` the standard input stream:
     *
     * ```js
     * process.stdin.unref();
     * ```
     * @since v0.1.98
     */
    export function createInterface(
        input: NodeJS.ReadableStream,
        output?: NodeJS.WritableStream,
        completer?: Completer | AsyncCompleter,
        terminal?: boolean,
    ): Interface;
    export function createInterface(options: ReadLineOptions): Interface;
    /**
     * The `readline.emitKeypressEvents()` method causes the given `Readable` stream to begin emitting `'keypress'` events corresponding to received input.
     *
     * Optionally, `interface` specifies a `readline.Interface` instance for which
     * autocompletion is disabled when copy-pasted input is detected.
     *
     * If the `stream` is a `TTY`, then it must be in raw mode.
     *
     * This is automatically called by any readline instance on its `input` if the`input` is a terminal. Closing the `readline` instance does not stop
     * the `input` from emitting `'keypress'` events.
     *
     * ```js
     * readline.emitKeypressEvents(process.stdin);
     * if (process.stdin.isTTY)
     *   process.stdin.setRawMode(true);
     * ```
     *
     * ## Example: Tiny CLI
     *
     * The following example illustrates the use of `readline.Interface` class to
     * implement a small command-line interface:
     *
     * ```js
     * const readline = require('readline');
     * const rl = readline.createInterface({
     *   input: process.stdin,
     *   output: process.stdout,
     *   prompt: 'OHAI> '
     * });
     *
     * rl.prompt();
     *
     * rl.on('line', (line) => {
     *   switch (line.trim()) {
     *     case 'hello':
     *       console.log('world!');
     *       break;
     *     default:
     *       console.log(`Say what? I might have heard '${line.trim()}'`);
     *       break;
     *   }
     *   rl.prompt();
     * }).on('close', () => {
     *   console.log('Have a great day!');
     *   process.exit(0);
     * });
     * ```
     *
     * ## Example: Read file stream line-by-Line
     *
     * A common use case for `readline` is to consume an input file one line at a
     * time. The easiest way to do so is leveraging the `fs.ReadStream` API as
     * well as a `for await...of` loop:
     *
     * ```js
     * const fs = require('fs');
     * const readline = require('readline');
     *
     * async function processLineByLine() {
     *   const fileStream = fs.createReadStream('input.txt');
     *
     *   const rl = readline.createInterface({
     *     input: fileStream,
     *     crlfDelay: Infinity
     *   });
     *   // Note: we use the crlfDelay option to recognize all instances of CR LF
     *   // ('\r\n') in input.txt as a single line break.
     *
     *   for await (const line of rl) {
     *     // Each line in input.txt will be successively available here as `line`.
     *     console.log(`Line from file: ${line}`);
     *   }
     * }
     *
     * processLineByLine();
     * ```
     *
     * Alternatively, one could use the `'line'` event:
     *
     * ```js
     * const fs = require('fs');
     * const readline = require('readline');
     *
     * const rl = readline.createInterface({
     *   input: fs.createReadStream('sample.txt'),
     *   crlfDelay: Infinity
     * });
     *
     * rl.on('line', (line) => {
     *   console.log(`Line from file: ${line}`);
     * });
     * ```
     *
     * Currently, `for await...of` loop can be a bit slower. If `async` / `await`flow and speed are both essential, a mixed approach can be applied:
     *
     * ```js
     * const { once } = require('events');
     * const { createReadStream } = require('fs');
     * const { createInterface } = require('readline');
     *
     * (async function processLineByLine() {
     *   try {
     *     const rl = createInterface({
     *       input: createReadStream('big-file.txt'),
     *       crlfDelay: Infinity
     *     });
     *
     *     rl.on('line', (line) => {
     *       // Process the line.
     *     });
     *
     *     await once(rl, 'close');
     *
     *     console.log('File processed.');
     *   } catch (err) {
     *     console.error(err);
     *   }
     * })();
     * ```
     * @since v0.7.7
     */
    export function emitKeypressEvents(stream: NodeJS.ReadableStream, readlineInterface?: Interface): void;
    export type Direction = -1 | 0 | 1;
    export interface CursorPos {
        rows: number;
        cols: number;
    }
    /**
     * The `readline.clearLine()` method clears current line of given `TTY` stream
     * in a specified direction identified by `dir`.
     * @since v0.7.7
     * @param callback Invoked once the operation completes.
     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
     */
    export function clearLine(stream: NodeJS.WritableStream, dir: Direction, callback?: () => void): boolean;
    /**
     * The `readline.clearScreenDown()` method clears the given `TTY` stream from
     * the current position of the cursor down.
     * @since v0.7.7
     * @param callback Invoked once the operation completes.
     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
     */
    export function clearScreenDown(stream: NodeJS.WritableStream, callback?: () => void): boolean;
    /**
     * The `readline.cursorTo()` method moves cursor to the specified position in a
     * given `TTY` `stream`.
     * @since v0.7.7
     * @param callback Invoked once the operation completes.
     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
     */
    export function cursorTo(stream: NodeJS.WritableStream, x: number, y?: number, callback?: () => void): boolean;
    /**
     * The `readline.moveCursor()` method moves the cursor _relative_ to its current
     * position in a given `TTY` `stream`.
     *
     * ## Example: Tiny CLI
     *
     * The following example illustrates the use of `readline.Interface` class to
     * implement a small command-line interface:
     *
     * ```js
     * const readline = require('readline');
     * const rl = readline.createInterface({
     *   input: process.stdin,
     *   output: process.stdout,
     *   prompt: 'OHAI> '
     * });
     *
     * rl.prompt();
     *
     * rl.on('line', (line) => {
     *   switch (line.trim()) {
     *     case 'hello':
     *       console.log('world!');
     *       break;
     *     default:
     *       console.log(`Say what? I might have heard '${line.trim()}'`);
     *       break;
     *   }
     *   rl.prompt();
     * }).on('close', () => {
     *   console.log('Have a great day!');
     *   process.exit(0);
     * });
     * ```
     *
     * ## Example: Read file stream line-by-Line
     *
     * A common use case for `readline` is to consume an input file one line at a
     * time. The easiest way to do so is leveraging the `fs.ReadStream` API as
     * well as a `for await...of` loop:
     *
     * ```js
     * const fs = require('fs');
     * const readline = require('readline');
     *
     * async function processLineByLine() {
     *   const fileStream = fs.createReadStream('input.txt');
     *
     *   const rl = readline.createInterface({
     *     input: fileStream,
     *     crlfDelay: Infinity
     *   });
     *   // Note: we use the crlfDelay option to recognize all instances of CR LF
     *   // ('\r\n') in input.txt as a single line break.
     *
     *   for await (const line of rl) {
     *     // Each line in input.txt will be successively available here as `line`.
     *     console.log(`Line from file: ${line}`);
     *   }
     * }
     *
     * processLineByLine();
     * ```
     *
     * Alternatively, one could use the `'line'` event:
     *
     * ```js
     * const fs = require('fs');
     * const readline = require('readline');
     *
     * const rl = readline.createInterface({
     *   input: fs.createReadStream('sample.txt'),
     *   crlfDelay: Infinity
     * });
     *
     * rl.on('line', (line) => {
     *   console.log(`Line from file: ${line}`);
     * });
     * ```
     *
     * Currently, `for await...of` loop can be a bit slower. If `async` / `await`flow and speed are both essential, a mixed approach can be applied:
     *
     * ```js
     * const { once } = require('events');
     * const { createReadStream } = require('fs');
     * const { createInterface } = require('readline');
     *
     * (async function processLineByLine() {
     *   try {
     *     const rl = createInterface({
     *       input: createReadStream('big-file.txt'),
     *       crlfDelay: Infinity
     *     });
     *
     *     rl.on('line', (line) => {
     *       // Process the line.
     *     });
     *
     *     await once(rl, 'close');
     *
     *     console.log('File processed.');
     *   } catch (err) {
     *     console.error(err);
     *   }
     * })();
     * ```
     * @since v0.7.7
     * @param callback Invoked once the operation completes.
     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
     */
    export function moveCursor(stream: NodeJS.WritableStream, dx: number, dy: number, callback?: () => void): boolean;
}
declare module "node:readline" {
    export * from "readline";
}

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