To-Do-List With MongoDB Integrated

//jshint esversion:6

const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const date = require(__dirname + "/date.js");
const _ = require("lodash");

const app = express();

app.set('view engine', 'ejs');

app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static("public"));

mongoose.connect("mongodb://localhost:27017/todolistDB")

const itemsSchema = {
  name: String
};

const Item = mongoose.model("Item", itemsSchema);

const item1 = new Item({
  name: "Welcome to your todolist!"
});

const item2 = new Item({
  name: "Hit the + button to add a new item."
});

const item3 = new Item({
  name: "<-- Hit this to delete an item."
});

const defaultItems = [item1, item2, item3];

const listSchema = {
  name: String,
  items: [itemsSchema]
};

const List = mongoose.model("List", listSchema);

app.get("/", function (req, res) {

  Item.find().then(foundItems => {
    // console.log(foundItems);

    if (foundItems.length === 0) {

      Item.insertMany(defaultItems)
        .then(results => {
          console.log('Documents inserted successfully');
        })
        .catch(err => {
          console.error(err);
        });
      res.redirect("/");
    }
    else {
      res.render("list", { listTitle: "Today", newListItems: foundItems });
    }

  })
    .catch(err => {
      console.error(err);
    });
});


app.get("/:customListName", function (req, res) {
  const customListName = _.capitalize(req.params.customListName);

  List.findOne({ name: customListName })
    .then(foundList => {
      if (!foundList) 
      {
        // Create a new list
        const list = new List({
          name: customListName,
          items: defaultItems
        });
        list.save();
        res.redirect("/" + customListName);
      } 
      else
      {
        // show an existing list
        res.render("list", { listTitle: foundList.name, newListItems: foundList.items });
      }
    })
    .catch(err => {
      console.error(err);
    });


});

app.post("/", function (req, res) {

  const itemName = req.body.newItem;
  const listName = req.body.list;
  const item = new Item({
    name: itemName
  });

  if (listName === "Today") {
    item.save();
    res.redirect("/");
  }
  else {
    List.findOne({ name: listName })
      .then(foundList => {
        foundList.items.push(item);
        foundList.save();
        res.redirect("/" + listName);
      })
      .catch(err => {
        console.error(err);
      });
  }



});

app.post("/delete", function (req, res) {

  const checkedItemId = req.body.checkbox;
  const listName = req.body.listName;


  if (listName === "Today") {
    Item.findByIdAndRemove(checkedItemId)
      .then(() => {
        console.log("succesfully deleted checked Item.");
      })
      .catch(err => {
        console.error(err);
      });
    res.redirect("/");
  }
  else {
    List.findOneAndUpdate({ name: listName }, {
      $pull: {
        items: {
          _id: checkedItemId
        }
      }
    })
      .then(foundList => {
        if (foundList) {
          res.redirect("/" + listName);
        } else {
          console.log("Error updating list");
        }
      })
      .catch(err => {
        console.error(err);
      });
  }

});

app.get("/about", function (req, res) {
  res.render("about");
});

app.listen(3000, function () {
  console.log("Server started on port 3000");
});

//jshint esversion:6

exports.getDate = function() {

  const today = new Date();

  const options = {
    weekday: "long",
    day: "numeric",
    month: "long"
  };

  return today.toLocaleDateString("en-US", options);

};

exports.getDay = function () {

  const today = new Date();

  const options = {
    weekday: "long"
  };

  return today.toLocaleDateString("en-US", options);

};

<%- include("header") -%>

<h2>This is the about page</h2>

<p>jkhkjshjks dhfjkh sjkdfh sjkdf jksdfhjksfhjks dhjfk sjkdfjksdfhjkshdfjk sdjkf sjkdf jksd fjks djfkhsjkdf hsjkd fhs</p>

<%- include("footer") -%>

</body>

<footer>
  Copyright Bhaskar Kulshrestha
</footer>

</html>

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title>To Do List</title>
  <link rel="stylesheet" href="css/styles.css">
</head>

<body>

<%- include("header") -%>

  <div class="box" id="heading">
    <h1>
      <%= listTitle %>
    </h1>
  </div>

  <div class="box">


    <% newListItems.forEach(function(item){ %>

      <form action="/delete" method="post">
        <div class="item">
          <input type="checkbox" name="checkbox" value="<%=item._id%>" onChange="this.form.submit()">
          <p>
            <%=item.name%>
          </p>
        </div>
        <input type="hidden" name="listName" value="<%= listTitle %>"></input>
      </form>
      <% }) %>


        <form class="item" action="/" method="post">
          <input type="text" name="newItem" placeholder="New Item" autocomplete="off">
          <button type="submit" name="list" value="<%= listTitle %>">+</button>
        </form>
  </div>

  <%- include("footer") -%>