-import chalk from 'chalk';
-import logger from './Logger';
+import fs from 'node:fs';
-export default class FileUtils {
- static handleFileException(logPrefix: string, fileType: string, filePath: string, error: NodeJS.ErrnoException, consoleOut = false): void {
- const prefix = logPrefix.length !== 0 ? logPrefix + ' ' : '';
- if (error.code === 'ENOENT') {
- if (consoleOut) {
- console.warn(chalk.yellow(prefix + fileType + ' file ' + filePath + ' not found: '), error);
- } else {
- logger.warn(prefix + fileType + ' file ' + filePath + ' not found: %j', error);
- }
- } else if (error.code === 'EEXIST') {
- if (consoleOut) {
- console.warn(chalk.yellow(prefix + fileType + ' file ' + filePath + ' already exists: '), error);
- } else {
- logger.warn(prefix + fileType + ' file ' + filePath + ' already exists: %j', error);
+import { ErrorUtils } from './ErrorUtils';
+import { logger } from './Logger';
+import { Utils } from './Utils';
+import type { FileType, JsonType } from '../types';
+
+export class FileUtils {
+ private constructor() {
+ // This is intentional
+ }
+
+ public static watchJsonFile<T extends JsonType>(
+ file: string,
+ fileType: FileType,
+ logPrefix: string,
+ refreshedVariable?: T,
+ listener: fs.WatchListener<string> = (event, filename) => {
+ if (Utils.isNotEmptyString(filename) && event === 'change') {
+ try {
+ logger.debug(`${logPrefix} ${fileType} file ${file} have changed, reload`);
+ refreshedVariable && (refreshedVariable = JSON.parse(fs.readFileSync(file, 'utf8')) as T);
+ } catch (error) {
+ ErrorUtils.handleFileException(
+ file,
+ fileType,
+ error as NodeJS.ErrnoException,
+ logPrefix,
+ {
+ throwError: false,
+ }
+ );
+ }
}
- } else if (error.code === 'EACCES') {
- if (consoleOut) {
- console.warn(chalk.yellow(prefix + fileType + ' file ' + filePath + ' access denied: '), error);
- } else {
- logger.warn(prefix + fileType + ' file ' + filePath + ' access denied: %j', error);
+ }
+ ): fs.FSWatcher | undefined {
+ if (Utils.isNotEmptyString(file)) {
+ try {
+ return fs.watch(file, listener);
+ } catch (error) {
+ ErrorUtils.handleFileException(file, fileType, error as NodeJS.ErrnoException, logPrefix, {
+ throwError: false,
+ });
}
} else {
- if (consoleOut) {
- console.warn(chalk.yellow(prefix + fileType + ' file ' + filePath + ' error: '), error);
- } else {
- logger.warn(prefix + fileType + ' file ' + filePath + ' error: %j', error);
- }
- throw error;
+ logger.info(`${logPrefix} No ${fileType} file to watch given. Not monitoring its changes`);
}
}
}