app.js

const AppError = require('./utils/appError')
const catchAsync = require('./utils/catchAsync')

exports.deleteOne = Model =>
  catchAsync(async (req, res, next) => {
    const doc = await Model.findByIdAndDelete(req.params.id);
    if (!doc) {
      return next(new AppError('No document found with that id', 404));
    }
    res.status(204).json({
      status: 'success',
      data: null,
    });
  });

  exports.updateOne = Model =>
  catchAsync(async (req, res, next) => {
    const doc = await Model.findByIdAndUpdate(req.params.id, req.body, {
      new: true,
      runValidators: true,
    });
    if (!doc) {
      return next(new AppError('No doccument found with that id', 404));
    }
    res.status(200).json({
      status: 'success',
      doc,
    });
  });

  exports.createOne = Model =>
  catchAsync(async (req, res, next) => {
    const doc = await Model.create(req.body);
    res.status(201).json({
      status: 'success',
      doc,
    });
  });

  exports.getOne = Model =>
  catchAsync(async (req, res, next) => {
    let doc = await Model.findById(req.params.id);
    
    if (!doc) {
      return next(new AppError('No Document found with that id', 404));
    }
    res.status(200).json({
      status: 'success',
      doc,
    });
  });

  exports.getAll = Model =>
  catchAsync(async (req, res, next) => {
    const docs = await Model.find().sort({ createdAt: -1 });

    // SEND Response res
    res.status(200).json({
      status: 'success',
      results: docs.length,
      docs
    });
  });