+import fs from 'node:fs';
+
import chalk from 'chalk';
-import getLogger from './Logger';
-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.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' not found: '), error);
- } else {
- getLogger().warn(prefix + fileType + ' file ' + filePath + ' not found: %j', error);
- }
- } else if (error.code === 'EEXIST') {
- if (consoleOut) {
- console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' already exists: '), error);
- } else {
- getLogger().warn(prefix + fileType + ' file ' + filePath + ' already exists: %j', error);
+// import { Utils, logger } from './internal';
+import { logger } from './Logger';
+import { Utils } from './Utils';
+import type { EmptyObject, FileType, HandleErrorParams, 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 ${file} have changed, reload`);
+ refreshedVariable && (refreshedVariable = JSON.parse(fs.readFileSync(file, 'utf8')) as T);
+ } catch (error) {
+ FileUtils.handleFileException(file, fileType, error as NodeJS.ErrnoException, logPrefix, {
+ throwError: false,
+ });
+ }
}
- } else if (error.code === 'EACCES') {
- if (consoleOut) {
- console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' access denied: '), error);
- } else {
- getLogger().warn(prefix + fileType + ' file ' + filePath + ' access denied: %j', error);
+ }
+ ): fs.FSWatcher | undefined {
+ if (Utils.isNotEmptyString(file)) {
+ try {
+ return fs.watch(file, listener);
+ } catch (error) {
+ FileUtils.handleFileException(file, fileType, error as NodeJS.ErrnoException, logPrefix, {
+ throwError: false,
+ });
}
} else {
- if (consoleOut) {
- console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' error: '), error);
- } else {
- getLogger().warn(prefix + fileType + ' file ' + filePath + ' error: %j', error);
- }
+ logger.info(`${logPrefix} No ${fileType} file to watch given. Not monitoring its changes`);
+ }
+ }
+
+ public static handleFileException(
+ file: string,
+ fileType: FileType,
+ error: NodeJS.ErrnoException,
+ logPrefix: string,
+ params: HandleErrorParams<EmptyObject> = { throwError: true, consoleOut: false }
+ ): void {
+ const prefix = Utils.isNotEmptyString(logPrefix) ? `${logPrefix} ` : '';
+ let logMsg: string;
+ switch (error.code) {
+ case 'ENOENT':
+ logMsg = `${fileType} file ${file} not found:`;
+ break;
+ case 'EEXIST':
+ logMsg = `${fileType} file ${file} already exists:`;
+ break;
+ case 'EACCES':
+ logMsg = `${fileType} file ${file} access denied:`;
+ break;
+ default:
+ logMsg = `${fileType} file ${file} error:`;
+ }
+ if (params?.consoleOut) {
+ logMsg = `${logMsg} `;
+ console.warn(`${chalk.green(prefix)}${chalk.yellow(logMsg)}`, error);
+ } else {
+ logger.warn(`${prefix}${logMsg}`, error);
+ }
+ if (params?.throwError) {
throw error;
}
}