refactor(simulator): remove unused async lock class attribute

[e-mobility-charging-stations-simulator.git] / src / utils / FileUtils.ts

diff --git a/src/utils/FileUtils.ts b/src/utils/FileUtils.ts
index a0d495a6b79104c92fbfd7fae2030fb365288064..4e556a4bc1c3d642c8c9edecbb92049d5e880044 100644 (file)
--- a/src/utils/FileUtils.ts
+++ b/src/utils/FileUtils.ts
@@ -1,38 +1,49 @@
-import { HandleErrorParams } from '../types/Error';
-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,
-      params: HandleErrorParams = { throwError: true, consoleOut: false }): void {
-    const prefix = logPrefix.length !== 0 ? logPrefix + ' ' : '';
-    if (error.code === 'ENOENT') {
-      if (params?.consoleOut) {
-        console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' not found: '), error);
-      } else {
-        logger.warn(prefix + fileType + ' file ' + filePath + ' 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);
-      } 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 ${file} have changed, reload`);
+          refreshedVariable && (refreshedVariable = JSON.parse(fs.readFileSync(file, 'utf8')) as T);
+        } catch (error) {
+          ErrorUtils.handleFileException(
+            file,
+            fileType,
+            error as NodeJS.ErrnoException,
+            logPrefix,
+            {
+              throwError: false,
+            }
+          );
+        }
       }
-    } else if (error.code === 'EACCES') {
-      if (params?.consoleOut) {
-        console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' access denied: '), error);
-      } else {
-        logger.warn(prefix + fileType + ' file ' + filePath + ' access denied: %j', error);
+    }
+  ): fs.FSWatcher | undefined {
+    if (Utils.isNotEmptyString(file)) {
+      try {
+        return fs.watch(file, listener);
+      } catch (error) {
+        ErrorUtils.handleFileException(file, fileType, error as NodeJS.ErrnoException, logPrefix, {
+          throwError: false,
+        });
       }
     } else {
-      if (params?.consoleOut) {
-        console.warn(chalk.green(prefix) + chalk.yellow(fileType + ' file ' + filePath + ' error: '), error);
-      } else {
-        logger.warn(prefix + fileType + ' file ' + filePath + ' error: %j', error);
-      }
-      if (params?.throwError) {
-        throw error;
-      }
+      logger.info(`${logPrefix} No ${fileType} file to watch given. Not monitoring its changes`);
     }
   }
 }