axios interceptors, middleware change, logger formatting, CORS

utils/logger.js

@@ -1,21 +1,60 @@
 require('dotenv').config();
-const { createLogger, transports, config, format } = require('winston');
-const { combine, timestamp, json } = format;
+const path = require("path");
 
-const logger = createLogger({
-  levels: config.npm.levels,
-  format: combine(
-    timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
-    json()
-  ),
-  transports: [
-    process.env.NODE_ENV !== 'production' ?
-      new transports.Console() :
-      new transports.File({ filename: __dirname + '/../logs/common.log' }),
-    new transports.File({ filename: __dirname + '/../logs/error.log', level: 'error' }),
-  ]
+const { createLogger, transports, config, format } = require('winston');
+const { combine, label, timestamp, printf } = format;
+
+const typedefs = require("../typedefs");
+
+const getLabel = (callingModule) => {
+  const parts = callingModule.filename.split(path.sep);
+  return path.join(parts[parts.length - 2], parts.pop());
+};
+
+const logMetaReplacer = (key, value) => {
+  if (key === "error") {
+    return value.name + ': ' + value.message;
+  }
+  return value;
+}
+
+const metaFormat = (meta) => {
+  if (Object.keys(meta).length > 0)
+    return '\n' + JSON.stringify(meta, logMetaReplacer) + '\n';
+  return '\n';
+}
+
+const logFormat = printf(({ level, message, label, timestamp, ...meta }) => {
+  if (meta.error) {
+    for (const key in meta.error) {
+      if (typeof key !== "symbol" && key !== "message" && key !== "name") {
+        delete meta.error[key]
+      }
+    }
+  }
+  return `${timestamp} [${label}] ${level}: ${message}${metaFormat(meta)}`;
 });
 
-module.exports = {
-  logger
-};
+/**
+ * Creates a curried function, and call it with the module in use to get logs with filename
+ * @param {typedefs.Module} callingModule The module from which the logger is called
+ * @returns {typedefs.Logger} 
+ */
+const logger = (callingModule) => {
+  return createLogger({
+    levels: config.npm.levels,
+    format: combine(
+      label({ label: getLabel(callingModule) }),
+      timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
+      logFormat,
+    ),
+    transports: [
+      process.env.NODE_ENV !== 'production' ?
+        new transports.Console() :
+        new transports.File({ filename: __dirname + '/../logs/common.log' }),
+      new transports.File({ filename: __dirname + '/../logs/error.log', level: 'error' }),
+    ]
+  });
+}
+
+module.exports = logger;