Init Commit

globalErrorHandler/globalErrorHandler.js

@@ -0,0 +1,72 @@
+const AppError = require('./AppError')
+const ErrorLocalization = require('./errorLocalization')
+const el = new ErrorLocalization()
+const handleCastErrorDB = (err) => {
+    const message = `Invalid ${err.path} : ${err.value}`
+    return new AppError(message, 400)
+}
+
+const handleDuplicateFieldsDB = (err) => {
+    const value = err.message.match(/(["'])(\\?.)*?\1/)[0]
+    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 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.log('ERROR', err)
+
+        // 2) send generic message:
+        res.status(500).json({
+            status: 'error',
+            message: 'Something went wrong',
+        })
+    }
+}
+
+module.exports = (err, req, res, next) => {
+    console.log(err)
+    err.statusCode = err.statusCode || 500
+    err.status = err.status || 'error'
+    err.message = el.getErrorText(err.name, err.parameters, 'persian') || err.message
+
+    if (process.env.NODE_ENV === 'development' || process.env.NODE_ENV === 'test') {
+        sendErrorDev(err, res)
+    } else if (process.env.NODE_ENV === 'production') {
+        let error = { ...err }
+        error.message = err.message
+
+        if (error.name === 'CastError') error = handleCastErrorDB(error)
+
+        if (error.code === 11000) error = handleDuplicateFieldsDB(error)
+
+        if (error.name === 'ValidationError') error = handleValidationErrorDB(error)
+
+        // send error to production
+        sendErrorProd(error, res)
+    }
+}