Added lesson 2

Author: gitdagray

lesson_02/.gitignore

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+node_modules
+logs

lesson_02/UserStories.md

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+# User Stories for techNotes
+
+1. [ ] Replace current sticky note system
+2. [ ] Add a public facing page with basic contact info 
+3. [ ] Add an employee login to the notes app 
+4. [ ] Provide a welcome page after login 
+5. [ ] Provide easy navigation
+6. [ ] Display current user and assigned role 
+7. [ ] Provide a logout option 
+8. [ ] Require users to login at least once per week
+9. [ ] Provide a way to remove employee access asap if needed 
+10. [ ] Notes are assigned to specific employees 
+11. [ ] Notes have a ticket #, title, note body, created & updated dates
+12. [ ] Notes are either OPEN or COMPLETED 
+13. [ ] Users can be Employees, Managers, or Admins 
+14. [ ] Notes can only be deleted by Managers or Admins 
+15. [ ] Anyone can create a note (when customer checks-in)
+16. [ ] Employees can only view and edit their assigned notes  
+17. [ ] Managers and Admins can view, edit, and delete all notes 
+18. [ ] Only Managers and Admins can access User Settings 
+19. [ ] Only Managers and Admins can create new users 
+20. [ ] Desktop mode is most important but should be available in mobile 

lesson_02/config/allowedOrigins.js

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+const allowedOrigins = [
+    'http://localhost:3000',
+    'https://www.dandrepairshop.com',
+    'https://dandrepairshop.com'
+]
+
+module.exports = allowedOrigins

lesson_02/config/corsOptions.js

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+const allowedOrigins = require('./allowedOrigins')
+
+const corsOptions = {
+    origin: (origin, callback) => {
+        if (allowedOrigins.indexOf(origin) !== -1 || !origin) {
+            callback(null, true)
+        } else {
+            callback(new Error('Not allowed by CORS'))
+        }
+    },
+    credentials: true,
+    optionsSuccessStatus: 200
+}
+
+module.exports = corsOptions 

lesson_02/middleware/errorHandler.js

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+const { logEvents } = require('./logger')
+
+const errorHandler = (err, req, res, next) => {
+    logEvents(`${err.name}: ${err.message}\t${req.method}\t${req.url}\t${req.headers.origin}`, 'errLog.log')
+    console.log(err.stack)
+
+    const status = res.statusCode ? res.statusCode : 500 // server error 
+
+    res.status(status)
+
+    res.json({ message: err.message })
+}
+
+module.exports = errorHandler 

lesson_02/middleware/logger.js

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+const { format } = require('date-fns')
+const { v4: uuid } = require('uuid')
+const fs = require('fs')
+const fsPromises = require('fs').promises
+const path = require('path')
+
+const logEvents = async (message, logFileName) => {
+    const dateTime = format(new Date(), 'yyyyMMdd\tHH:mm:ss')
+    const logItem = `${dateTime}\t${uuid()}\t${message}\n`
+
+    try {
+        if (!fs.existsSync(path.join(__dirname, '..', 'logs'))) {
+            await fsPromises.mkdir(path.join(__dirname, '..', 'logs'))
+        }
+        await fsPromises.appendFile(path.join(__dirname, '..', 'logs', logFileName), logItem)
+    } catch (err) {
+        console.log(err)
+    }
+}
+
+const logger = (req, res, next) => {
+    logEvents(`${req.method}\t${req.url}\t${req.headers.origin}`, 'reqLog.log')
+    console.log(`${req.method} ${req.path}`)
+    next()
+}
+
+module.exports = { logEvents, logger }