app.js

//jshint esversion:6

const express = require("express");
const bodyParser = require("body-parser");
const date = require(__dirname + "/date.js");
const mongoose = require("mongoose");
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+srv://DB-user:DB-password@cluster0.ncaco.mongodb.net/todolistDB", { useNewUrlParser: true, useUnifiedTopology: true, useFindAndModify: false });

const itemsSchema = {
  name: String
};

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

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

const item2 = new Item ({
  name: "item 2"
});

const item3 = new Item ({
  name: "item 3"
});

const defaultItems = [item1, item2, item3];

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

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

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

  Item.find({}, function(err, foundItems) {
    if (foundItems.length === 0) {
      Item.insertMany(defaultItems, function(err) {
        if (err) {
          console.log(err);
        } else {
          console.log("successfully saved items to db");
        }
      });
      res.redirect("/");
    } else {
      res.render("list", {listTitle: "Today", newListItems: foundItems});
    }
  });

});

app.get("/:customListName", function(req, res) {
  const customListName = _.capitalize(req.params.customListName);
  List.findOne({name: customListName}, function(err, foundList) {
    if (!err) {
      if (!foundList) {
        const list = new List({
          name: customListName,
          items: defaultItems
        })
        list.save();
        res.redirect("/" + customListName);
      } else {
        res.render("list", {listTitle: foundList.name, newListItems: foundList.items});
      }
    }
  });
})

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}, function(err, foundList) {
      foundList.items.push(item);
      foundList.save();
      res.redirect("/" + listName);
    })
  }


});

app.post("/delete", function(req,res) {
  const checkedItemId = req.body.checkbox;
  const listName = req.body.listName;

  if(listName === "Today") {
    Item.findByIdAndRemove(checkedItemId, function(err) {
      if (err) {
        console.log(err);
      } else {
        console.log("Successfully deleted item");
        res.redirect("/");
      }
    })
  } else {
    List.findOneAndUpdate({name: listName}, {$pull: {items: {_id: checkedItemId}}}, function(err, foundList){
      if (!err) {
        res.redirect("/" + listName);
      }
    })
  }


})

app.get("/work", function(req,res){
  res.render("list", {listTitle: "Work List", newListItems: workItems});
});

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



let port = process.env.PORT;
if (port == null || port == "") {
  port = 3000;
}

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