Add advanced logging to your project

Components Used: Winston

javascript_typescript/logging.js

@@ -0,0 +1,64 @@
+/**
+Author: T31M <t31m@cyberstuff.me>
+2019
+*/
+
+const { createLogger, format, transports } = require("winston");
+
+const { combine, timestamp, printf, colorize, splat, json } = format;
+
+const maxFunctionLogLength = 60;
+
+const myFormat = printf(({ timestamp, loc, level, message }) => {
+  const start = process.hrtime();
+  if (loc) {
+    return `${timestamp} ${level}: ${message.padEnd(90)} ${loc.padEnd(
+      60
+    )} log: ${(process.hrtime(start)[1] / 1000000).toFixed(2)}ms`;
+  }
+  return `${timestamp} ${level}: ${message} ${(
+    process.hrtime(start)[1] / 1000000
+  ).toFixed(2)}ms`;
+});
+
+const preProcessing = format((info, opts) => {
+  const stack = new Error().stack.split("\n");
+  stack.shift();
+  for (elem of Object.values(stack)) {
+    elem = elem.toString().trim();
+    if (elem.indexOf("node_modules") < 0 && elem.indexOf("utils") < 0) {
+      info.loc = elem.slice(3, elem.length);
+      if (info.loc.length > maxFunctionLogLength) {
+        info.loc = `${info.loc.slice(
+          0,
+          info.loc.indexOf(" ")
+        )} -> ${info.loc.slice(
+          info.loc.lastIndexOf("\\") + 1,
+          info.loc.length - 1
+        )}`;
+      }
+      return info;
+    }
+  }
+  return info;
+});
+
+module.exports.logger = createLogger({
+  level: "debug",
+  format: combine(
+    colorize(),
+    timestamp(),
+    // splat(),
+    preProcessing(),
+    myFormat
+    // json(),
+  ),
+  transports: [
+    // - Write to all logs with level `info` and below to `combined.log`
+    // - Write all logs error (and below) to `error.log`.
+    // new winston.transports.File({ filename: 'error.log', level: 'error' }),
+    // new winston.transports.File({ filename: 'combined.log' })
+    
+    new transports.Console({ format: format.myFormat })
+  ]
+});