Dev

backend/.eslintrc.js

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+module.exports = {
+  env: {
+    browser: true,
+    es2021: true
+  },
+  extends: [
+    'standard'
+  ],
+  parserOptions: {
+    ecmaVersion: 12,
+    sourceType: 'module'
+  },
+  rules: {
+  }
+}

backend/inMemoryWorkshop.js

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+const inMemoryWorkshop = []
+
+function getWorkshopList () {
+  return new Promise((resolve) => {
+    resolve(inMemoryWorkshop)
+  })
+}
+
+function getWorkshopByName (name) {
+  return new Promise((resolve, reject) => {
+    if (!name) {
+      reject(new Error('name parameter is required'))
+    }
+    resolve(inMemoryWorkshop.find(workshop => workshop.name === workshop))
+  })
+}
+
+function addWorkshop (name, description) {
+  return new Promise((resolve, reject) => {
+    if (!name) {
+      reject(new Error('Workshop name required'))
+    }
+    if (!description) {
+      reject(new Error('Workshop description required'))
+    }
+    inMemoryWorkshop.push({
+      name,
+      description
+    })
+    resolve()
+  })
+}
+
+function removeWorkshopByName (name) {
+  return new Promise((resolve, reject) => {
+    var obj = JSON.parse(JSON.stringify(inMemoryWorkshop))
+    for (var i = 0; i < inMemoryWorkshop.length; i++) {
+      console.log('obj' + obj[i].name)
+      console.log(name)
+      if (obj[i].name === name) {
+        console.log('here')
+        inMemoryWorkshop.splice(i, 1)
+      }
+    }
+    resolve()
+  })
+}
+
+function updateWorkshop (name, oldName) {
+  return new Promise((resolve, reject) => {
+    var obj = JSON.parse(JSON.stringify(inMemoryWorkshop))
+    for (var i = 0; i < inMemoryWorkshop.length; i++) {
+      if (obj[i].name === oldName) {
+        obj[i].name = name
+        inMemoryWorkshop[i] = obj[i]
+      }
+    }
+    resolve()
+  })
+}
+
+module.exports = {
+  getWorkshopList,
+  getWorkshopByName,
+  addWorkshop,
+  removeWorkshopByName,
+  updateWorkshop
+}

backend/index.js

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+
+const express = require('express')
+const app = express()
+const InMemoryWorkshop = require('./inMemoryWorkshop')
+const path = require('path')
+const ejs = require('ejs')
+var bodyParser = require('body-parser')
+
+app.use(bodyParser.urlencoded({ extended: false }))
+
+// set the view engine to ejs
+app.set('view engine', 'ejs')
+app.set('views', path.join(__dirname, '..', 'frontend/'))
+app.use(express.static(path.join(__dirname, '..', 'frontend/style')))
+
+app.get('/', function (req, res) {
+  InMemoryWorkshop.getWorkshopList()
+    .then(workshops => {
+      res.render('index', {
+        workshops: workshops
+      })
+    })
+})
+
+app.get('/workshop', function (req, res) {
+  console.log('get')
+  res.render('workshop')
+})
+
+app.get('/update-workshop', function (req, res) {
+  res.render('update-workshop')
+})
+app.get('/remove-workshop', function (req, res) {
+  res.render('remove-workshop')
+})
+app.post('/workshop', function (req, res) {
+  console.log('add')
+  const name = req.body.name
+  const description = req.body.description
+  InMemoryWorkshop.addWorkshop(name, description).then(() => {
+    InMemoryWorkshop.getWorkshopList()
+      .then(workshops => {
+        res.render('index', {
+          workshops: workshops
+        })
+      })
+  })
+    .catch(e => res.send(e.message))
+})
+
+app.get('/workshop/:name', function (req, res) {
+  const workshopName = req.params.name
+  InMemoryWorkshop.getWorkshopByName(workshopName)
+    .then(workshop => {
+      res.render('ejs/workshop', workshop)
+    })
+    .catch(e => ejs.send(e.message))
+})
+
+app.post('/remove-workshop', function (req, res) {
+  const name = req.body.name
+  InMemoryWorkshop.removeWorkshopByName(name).then(() => {
+    InMemoryWorkshop.getWorkshopList()
+      .then(workshops => {
+        res.render('index', {
+          workshops: workshops
+        })
+      })
+  })
+    .catch(e => res.send(e.message))
+})
+
+app.post('/update-workshop', function (req, res) {
+  console.log('update')
+  const name = req.body.name
+  const oldName = req.body.oldName
+  InMemoryWorkshop.updateWorkshop(name, oldName).then(() => {
+    InMemoryWorkshop.getWorkshopList()
+      .then(workshops => {
+        res.render('index', {
+          workshops: workshops
+        })
+      })
+  })
+    .catch(e => res.send(e.message))
+})
+
+app.listen(3000, function () {
+  console.log('Workshop app listening on port 3000!')
+})

frontend/index.ejs

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+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <% include ./head %>
+</head>
+
+<body class="container">
+
+    <div class="jumbotron">
+        <h1>Workshops</h1>
+        <p>here is the list of workshop</p>
+    </div>
+
+    <a type="button" href="/workshop" class="btn btn-success btn-lg">Create new workshop</a>
+    <a type="button" href="/update-workshop" class="btn btn-success btn-lg">Update</a>
+    <a type="button" href="/remove-workshop" class="btn btn-danger btn-lg">Remove</a>
+
+    <ul class="list-unstyled"></ul>
+    <% workshops.forEach(function(workshop) { %>
+    <li class="media my-4">
+        <div class="media-body">
+            <h5 class="mt-0 mb-1"><%= workshop.name %></h5>
+            <%= workshop.description %>
+        </div>
+    </li>
+    <% }); %>
+    </ul>
+
+    <footer>
+        <% include ./footer %>
+    </footer>
+
+</body>
+
+</html>

frontend/remove-workshop.ejs

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+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <% include ./head %>
+</head>
+
+<body class="container">
+
+    <form action="/remove-workshop" method="post">
+        <div class="form-group">
+            <label for="name">Workshop name to delete</label>
+            <input type="text" name="name" class="form-control" id="name" placeholder="Workshop Name" required>
+        </div>
+
+        <button type="submit" class="btn btn-danger">Remove</button>
+        <a type="button" class="btn btn-secondary" href="/">Cancel</a>
+    </form>
+
+    <footer>
+        <% include ./footer %>
+    </footer>
+
+</body>
+
+</html>

frontend/update-workshop.ejs

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+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <% include ./head %>
+</head>
+
+<body class="container">
+
+    <form action="/update-workshop" method="post">
+        <div class="form-group">
+            <label for="oldName">Old Name</label>
+            <input type="text" name="oldName" class="form-control" id="oldName" placeholder="Workshop Name" required>
+        </div>
+        <div class="form-group">
+            <label for="name">Name</label>
+            <input type="text" name="name" class="form-control" id="name" placeholder="Workshop Name" required>
+        </div>
+        <button type="submit" class="btn btn-primary">Save</button>
+        <a type="button" class="btn btn-secondary" href="/">Cancel</a>
+    </form>
+
+    <footer>
+        <% include ./footer %>
+    </footer>
+
+</body>
+
+</html>