X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Futils%2FFileUtils.ts;h=4e556a4bc1c3d642c8c9edecbb92049d5e880044;hb=42486f2357b011f9244c6b29f4e05185138ce8d1;hp=c0891e646a1da0242b31da66375a0251f733cb0f;hpb=6ce0bca57a96ef920df4e0786d8f28b0b89a36ef;p=e-mobility-charging-stations-simulator.git

diff --git a/src/utils/FileUtils.ts b/src/utils/FileUtils.ts
index c0891e64..4e556a4b 100644
--- a/src/utils/FileUtils.ts
+++ b/src/utils/FileUtils.ts
@@ -1,21 +1,49 @@
-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(prefix + fileType + ' file ' + filePath + ' not found: ', error);
-      } else {
-        logger.warn(prefix + fileType + ' file ' + filePath + ' not found: %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 ${file} have changed, reload`);
+          refreshedVariable && (refreshedVariable = JSON.parse(fs.readFileSync(file, 'utf8')) as T);
+        } catch (error) {
+          ErrorUtils.handleFileException(
+            file,
+            fileType,
+            error as NodeJS.ErrnoException,
+            logPrefix,
+            {
+              throwError: false,
+            }
+          );
+        }
       }
-    } else {
-      if (consoleOut) {
-        console.error(prefix + fileType + ' file ' + filePath + ' opening error: ', error);
-      } else {
-        logger.error(prefix + fileType + ' file ' + filePath + ' opening error: %j', error);
+    }
+  ): fs.FSWatcher | undefined {
+    if (Utils.isNotEmptyString(file)) {
+      try {
+        return fs.watch(file, listener);
+      } catch (error) {
+        ErrorUtils.handleFileException(file, fileType, error as NodeJS.ErrnoException, logPrefix, {
+          throwError: false,
+        });
       }
-      throw error;
+    } else {
+      logger.info(`${logPrefix} No ${fileType} file to watch given. Not monitoring its changes`);
     }
   }
 }