From c520985a4fd09c17fb21df7902ed4dbc48699a58 Mon Sep 17 00:00:00 2001
From: tb-killa <oliverseidler@gmail.com>
Date: Sun, 12 Aug 2018 20:42:06 +0200
Subject: [PATCH] Implement cleanup-function for logfiles

---
 lib/util/logger.js | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/lib/util/logger.js b/lib/util/logger.js
index 8324ce85..db180d6e 100644
--- a/lib/util/logger.js
+++ b/lib/util/logger.js
@@ -47,6 +47,37 @@ const logger = new (winston.Logger)({
     ],
 });
 
+(function cleanup() {
+var wantkeep = 5; // How many files (count) we want to keep ??
+fs.readdir(logDirectory, function(err,files){
+	if (err) return logger.error(`Some Error on logger-cleanup-function-readdir: ${err}`);
+	var filesList = files.filter(function(e){
+    return path.extname(e).toLowerCase() === '.txt' // Filter only txt files
+	});
+	filesList.sort(function(filea, fileb){
+		return fs.statSync(logDirectory + '/' + fileb).mtime.getTime() - fs.statSync(logDirectory + '/' + filea).mtime.getTime(); // Filter newest on top
+	});
+	wantkeep = wantkeep + 1; //Lets be safe and add one more on top.
+	if (filesList.length > wantkeep) {
+	filesList = filesList.slice(wantkeep); // How many files (count) we want to keep ??
+	for (var i = 0; i < filesList.length; i++) {
+		logger.info(`actually count to delete: ${filesList.length}`); //counter of files who real would be delete (count-readdir - wantkeep)
+		logger.warn(`Want to CleanUp File: ${filesList[i]}`); 
+		const unlinkname = filesList[i]; //lets save the filename because after delete ...
+		fs.unlink(path.join(logDirectory, filesList[i]), function(err){
+			if (err) {
+				logger.error(`Failed to delete: ${unlinkname} - ${err}`);
+			} else {
+				logger.info(`Successfully deleted ${unlinkname}`);
+			}
+		});
+	}
+	} else {
+		logger.warn(`No need to work on file cleanup because we need more than ${wantkeep} Files (wantkeep-value) to proceed - actually count: ${filesList.length}`);
+	}
+});
+})();
+
 logger.info(`Logging to directory: '${logDirectory}' with filename: '${completefilename}.txt'`);
 
 logger.transports.console.level = logLevel;