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