Initial commit 🚀

4-natours/after-section-11/controllers/errorController.js

@@ -0,0 +1,79 @@
+const AppError = require('./../utils/appError');
+
+const handleCastErrorDB = err => {
+  const message = `Invalid ${err.path}: ${err.value}.`;
+  return new AppError(message, 400);
+};
+
+const handleDuplicateFieldsDB = err => {
+  const value = err.errmsg.match(/(["'])(\\?.)*?\1/)[0];
+  console.log(value);
+
+  const message = `Duplicate field value: ${value}. Please use another value!`;
+  return new AppError(message, 400);
+};
+
+const handleValidationErrorDB = err => {
+  const errors = Object.values(err.errors).map(el => el.message);
+
+  const message = `Invalid input data. ${errors.join('. ')}`;
+  return new AppError(message, 400);
+};
+
+const handleJWTError = () =>
+  new AppError('Invalid token. Please log in again!', 401);
+
+const handleJWTExpiredError = () =>
+  new AppError('Your token has expired! Please log in again.', 401);
+
+const sendErrorDev = (err, res) => {
+  res.status(err.statusCode).json({
+    status: err.status,
+    error: err,
+    message: err.message,
+    stack: err.stack
+  });
+};
+
+const sendErrorProd = (err, res) => {
+  // Operational, trusted error: send message to client
+  if (err.isOperational) {
+    res.status(err.statusCode).json({
+      status: err.status,
+      message: err.message
+    });
+
+    // Programming or other unknown error: don't leak error details
+  } else {
+    // 1) Log error
+    console.error('ERROR 💥', err);
+
+    // 2) Send generic message
+    res.status(500).json({
+      status: 'error',
+      message: 'Something went very wrong!'
+    });
+  }
+};
+
+module.exports = (err, req, res, next) => {
+  // console.log(err.stack);
+
+  err.statusCode = err.statusCode || 500;
+  err.status = err.status || 'error';
+
+  if (process.env.NODE_ENV === 'development') {
+    sendErrorDev(err, res);
+  } else if (process.env.NODE_ENV === 'production') {
+    let error = { ...err };
+
+    if (error.name === 'CastError') error = handleCastErrorDB(error);
+    if (error.code === 11000) error = handleDuplicateFieldsDB(error);
+    if (error.name === 'ValidationError')
+      error = handleValidationErrorDB(error);
+    if (error.name === 'JsonWebTokenError') error = handleJWTError();
+    if (error.name === 'TokenExpiredError') error = handleJWTExpiredError();
+
+    sendErrorProd(error, res);
+  }
+};