const Category = require("../models/category.js");
const Item = require("../models/item.js");
const asyncHandler = require("express-async-handler");

exports.index = asyncHandler(async (req, res, next) => {
  // gets categories from database
  const rawCats = await Category.find().lean().exec();

  // function to get items for specified category from database
  const getItems = async (category) => {
    return await Item.find({ category: category._id }).lean().exec();
  };

  // creats a copy of the raw categories array with each category's items included as .items (copying is easier than overwriting)
  const categories = [];
  for (let rawCat of rawCats) {
    rawCat.items = await getItems(rawCat);
    categories.push(rawCat);
  }

  res.render("index", {
    categories: categories,
  });
});