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Improve class method consistency, adding NodeFileTypeParser.fromFile() #644

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Jul 11, 2024
Merged

Improve class method consistency, adding NodeFileTypeParser.fromFile() #644

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c0799f3
Improve class method consistency, adding `NodeFileTypeParser.fromFile()`
Borewit Jul 11, 2024
7ebf692
Update index.d.ts
sindresorhus Jul 11, 2024
a13ba8c
Update core.d.ts
sindresorhus Jul 11, 2024
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3 changes: 3 additions & 0 deletions core.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -476,6 +476,9 @@ export declare class TokenizerPositionError extends Error {
export declare class FileTypeParser {
detectors: Iterable<Detector>;

/**
@param options - `options.customDetectors`: list of custom detectors
*/
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Doc comments are not needed if they don't add anything to the types. Here, the doc comments just repeats the information available in the below types.

constructor(options?: {customDetectors?: Iterable<Detector>});

/**
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9 changes: 5 additions & 4 deletions index.d.ts
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Expand Up @@ -3,7 +3,7 @@ Typings for Node.js specific entry point.
*/

import type {Readable as NodeReadableStream} from 'node:stream';
import type {FileTypeResult, StreamOptions, AnyWebReadableStream} from './core.js';
import type {FileTypeResult, StreamOptions, AnyWebReadableStream, Detector} from './core.js';
import {FileTypeParser} from './core.js';

export type ReadableStreamWithFileType = NodeReadableStream & {
Expand All @@ -16,6 +16,8 @@ export declare class NodeFileTypeParser extends FileTypeParser {
*/
fromStream(stream: AnyWebReadableStream<Uint8Array> | NodeReadableStream): Promise<FileTypeResult | undefined>;

fromFile(filePath: string): Promise<FileTypeResult | undefined>;

/**
Works the same way as {@link fileTypeStream}, additionally taking into account custom detectors (if any were provided to the constructor).
*/
Expand All @@ -25,12 +27,11 @@ export declare class NodeFileTypeParser extends FileTypeParser {
/**
Detect the file type of a file path.

The file type is detected by checking the [magic number](https://en.wikipedia.org/wiki/Magic_number_(programming)#Magic_numbers_in_files) of the buffer.
The file type is detected by checking the [magic number](https://en.wikipedia.org/wiki/Magic_number_(programming)#Magic_numbers_in_files) of the file.

@param path
@returns The detected file type and MIME type or `undefined` when there is no match.
*/
export function fileTypeFromFile(path: string): Promise<FileTypeResult | undefined>;
export function fileTypeFromFile(filePath: string, options?: {customDetectors?: Iterable<Detector>}): Promise<FileTypeResult | undefined>;

export function fileTypeFromStream(stream: AnyWebReadableStream<Uint8Array> | NodeReadableStream): Promise<FileTypeResult | undefined>;

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17 changes: 10 additions & 7 deletions index.js
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Expand Up @@ -16,6 +16,15 @@ export class NodeFileTypeParser extends FileTypeParser {
}
}

async fromFile(path) {
const tokenizer = await strtok3.fromFile(path);
try {
return await super.fromTokenizer(tokenizer);
} finally {
await tokenizer.close();
}
}

async toDetectionStream(readableStream, options = {}) {
const {default: stream} = await import('node:stream');
const {sampleSize = reasonableDetectionSizeInBytes} = options;
Expand Down Expand Up @@ -53,13 +62,7 @@ export class NodeFileTypeParser extends FileTypeParser {
}

export async function fileTypeFromFile(path, fileTypeOptions) {
const tokenizer = await strtok3.fromFile(path);
try {
const parser = new FileTypeParser(fileTypeOptions);
return await parser.fromTokenizer(tokenizer);
} finally {
await tokenizer.close();
}
return (new NodeFileTypeParser(fileTypeOptions)).fromFile(path, fileTypeOptions);
}

export async function fileTypeFromStream(stream, fileTypeOptions) {
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