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/var/www/uibuilder.cmshelp.dk/httpdocs/node_modules/metro-file-map/src/watchers/AbstractWatcher.js.flow

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/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow strict-local
 */

import type {WatcherBackend, WatcherBackendChangeEvent} from '../flow-types';

import {posixPathMatchesPattern} from './common';
import EventEmitter from 'events';
import * as path from 'path';

export type Listeners = $ReadOnly<{
  onFileEvent: (event: WatcherBackendChangeEvent) => void,
  onError: (error: Error) => void,
}>;

export class AbstractWatcher implements WatcherBackend {
  +root: string;
  +ignored: ?RegExp;
  +globs: $ReadOnlyArray<string>;
  +dot: boolean;
  +doIgnore: (path: string) => boolean;

#emitter: EventEmitter = new EventEmitter();

constructor(
    dir: string,
    {
      ignored,
      globs,
      dot,
    }: $ReadOnly<{
      ignored: ?RegExp,
      globs: $ReadOnlyArray<string>,
      dot: boolean,
      ...
    }>,
  ) {
    this.dot = dot || false;
    this.ignored = ignored;
    this.globs = globs;
    this.doIgnore = ignored
      ? (filePath: string) => posixPathMatchesPattern(ignored, filePath)
      : () => false;

this.root = path.resolve(dir);
  }

onFileEvent(
    listener: (event: WatcherBackendChangeEvent) => void,
  ): () => void {
    this.#emitter.on('fileevent', listener);
    return () => {
      this.#emitter.removeListener('fileevent', listener);
    };
  }

onError(listener: (error: Error) => void): () => void {
    this.#emitter.on('error', listener);
    return () => {
      this.#emitter.removeListener('error', listener);
    };
  }

async startWatching(): Promise<void> {
    // Must be implemented by subclasses
  }

async stopWatching() {
    this.#emitter.removeAllListeners();
  }

emitFileEvent(event: Omit<WatcherBackendChangeEvent, 'root'>) {
    this.#emitter.emit('fileevent', {
      ...event,
      root: this.root,
    });
  }

emitError(error: Error) {
    this.#emitter.emit('error', error);
  }

getPauseReason(): ?string {
    return null;
  }
}

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Name	Size	Perms	Modified	Actions
AbstractWatcher.js	2.17 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
AbstractWatcher.js.flow	2.04 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
common.js	1.11 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
common.js.flow	2.38 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
FallbackWatcher.js	8.43 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
FallbackWatcher.js.flow	11.65 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
NativeWatcher.js	3.02 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
NativeWatcher.js.flow	3.77 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
RecrawlWarning.js	1.16 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
RecrawlWarning.js.flow	1.73 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
WatchmanWatcher.js	8.73 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive
WatchmanWatcher.js.flow	9.21 KB	lrw-r--r--	2025-03-28 11:04:32	Edit Download recursive recursive

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