sos-nextjs/db/models/cart.js

const pg = require('../pg')
const joinjs = require('join-js').default;
const debug = require('debug')('sos:db:cart')
const mappings = require('../mappings')

const cart = module.exports = {}

cart.create = async session_uuid => {
  const query = {
    text: 'select * from sos.create_cart($1)',
    values: [
      session_uuid
    ]
  }

  debug(query);

  const {rows} = await pg.query(query)
  return joinjs.map(rows, mappings, 'cartMap', 'cart_')[0];
}

cart.addItemToCart = async (cart_uuid, item_uuid, amount) => {
  const query = {
    text: 'select * from sos.add_item_to_cart($1, $2, $3)',
    values: [
      cart_uuid,
      item_uuid,
      amount
    ]
  }

  debug(query);

  const {rows} = await pg.query(query)
  return joinjs.map(rows, mappings, 'cartMap', 'cart_')[0];
}

cart.removeItemFromCart = async (cart_uuid, item_uuid, amount) => {
  const query = {
    text: 'select * from sos.remove_item_from_cart($1, $2, $3)',
    values: [
      cart_uuid,
      item_uuid,
      amount
    ]
  }

  debug(query);

  const {rows} = await pg.query(query)
  return joinjs.map(rows, mappings, 'cartMap', 'cart_')[0];
}