messages.js

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

//Handles get request to show all messages in the database targetted at the user
exports.getInbox = (req, res, next) => {
    //By obtaning the username from the token, finds the messages within the database that are specifically targetted at the user
    const userId = req.userData._id;
    Message.find({ destination: userId }).select('-__v').exec()
        .then(docs => {
            const response = {
                items: docs.map(doc => {
                    return {
                        _id: doc._id,
                        sender: doc.sender,
                        title: doc.title,
                        //Also returns request link to get the full message from the API
                        request: {
                            type: 'GET',
                            url: 'https://caracold-304resit-api.herokuapp.com/inbox/' + doc._id
                        }
                    }
                })
            }
            res.status(200).json(response);
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
}

//Handles post request to send a message, using the token to set the sender to the current user
exports.sendMessage = (req, res, next) => {
    const userId = req.userData._id;
    const message = new Message({
        _id: new mongoose.Types.ObjectId(),
        sender: userId,
        destination: req.body.destId,
        item: req.body.item,
        title: req.body.title,
        content: req.body.content
    })
    message.save()
        .then(result => {
            console.log(result);
            res.status(201).json({
                message: 'Message sent.',
                newMsg: {
                    _id: result._id,
                    sender: result.sender,
                    destination: result.destination,
                    item: result.item,
                    title: result.title,
                    content: result.content
                }
            });
        })
        .catch(err => {
            console.log(err);
            console.log(decoded);
            res.status(500).json({
                error: err
            });
        });
}

//Handles get requests where for messages sent by, rather than to, the user
exports.getSent = (req, res, next) => {
    const userId = req.userData._id;
    Message.find({ sender: userId }).select('-__v').exec()
        .then(docs => {
            const response = {
                count: docs.length,
                items: docs.map(doc => {
                    return {
                        _id: doc._id,
                        sender: doc.sender,
                        title: doc.title,
                        request: {
                            type: 'GET',
                            url: 'https://caracold-304resit-api.herokuapp.com/inbox' + doc._id
                        }
                    }
                })
            }
            res.status(200).json(response);
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
}

//Fetches the full information of a specific message from the database
exports.getMessage = (req, res, next) => {
    const id = req.params.msgId;
    Message.findById(id)
        .exec()
        .then(doc => {
            console.log(doc);
            if (doc) {
                res.status(200).json(doc);
            } else {
                res.status(404).json({
                    message: 'Message ID not found.'
                })
            }
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({ error: err });
        })
}