items.js

const Item = require('../models/item');
const User = require('../models/user');
const mongoose = require('mongoose');
const jwt = require('jsonwebtoken');

//On Get request, return all item objects in the database
exports.getAllItems = (req, res, next) => {
    Item.find()
        //Without the __v argument as it has no use to the app
        .select('-__v')
        .exec()
        .then(docs => {
            const response = {
                items: docs.map(doc => {
                    return {
                        _id: doc._id,
                        name: doc.name,
                        publisher: doc.publisher,
                        category: doc.category,
                        features: doc.features,
                        condition: doc.condition,
                        askPrice: doc.askPrice,
                        location: doc.location,
                        picture: doc.pictures,
                        //with each item, also return a request link to the individual item for more information
                        request: {
                            type: 'GET',
                            url: 'https://caracold-304resit-api.herokuapp.com/itemlist/' + doc._id
                        }
                    }
                })
            }
            res.status(200).json(response);
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
}

//Handle post request to create a new item in the database
exports.newItem = (req, res, next) => {
    //The poster's id is obtained from the token and stored in the databse along with the item
    const decoded = jwt.decode(req.header.token);
    const userId = decoded.username;
    const item = new Item({
        _id: new mongoose.Types.ObjectId(),
        name: req.body.name,
        publisher: userId,
        category: req.body.category,
        features: req.body.features,
        condition: req.body.condition,
        askPrice: req.body.askPrice,
        location: req.body.location,
        picture: req.file.path
    })
    item.save()
        .then(result => {
            console.log(result);
            res.status(201).json({
                message: 'Item successfully created',
                newItem: {
                    _id: result._id,
                    name: result.name,
                    publisher: result.publisher,
                    category: result.category,
                    features: result.features,
                    condition: result.condition,
                    askPrice: result.askPrice,
                    location: result.location,
                    picture: result.picture
                    }
            });
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
}

//Handles  Get request for specific item by id
exports.getItem = (req, res, next) => {
    const id = req.params.itemId;
    Item.findById(id)
        .exec()
        .then(doc => {
            console.log(doc);
            if (doc) {
                res.status(200).json(doc);
            } else {
                res.status(404).json({
                    message: 'Object ID not found.'
                })
            }
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({ error: err });
        })
}

//Handles delete request to remove specified item from the database
exports.deleteItem = (req, res, next) => {
    const id = req.params.itemId;
    Item.remove({ _id: id })
        .exec()
        .then(result => {
            res.status(200).json({ message: 'Item successfully removed' })
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
}