README.md

NodeJS getting products prices from iFood markets

This project is developing with PuppeteerCrawler.

Libs:

• Moment JS
• MongoDB NodeJS
• Crawlee

Get started:

1. Create database in mongoDB as named ifood.
2. Create collection in database ifood as named mercados.
   • Create documents like below:

   {
       "id" : 1,
       "nome" : "Super Prixs",
       "cidade" : "Rio de Janeiro",
       "bairro" : "Maracanã",
       "link_ifood" : "https://www.ifood.com.br/delivery/rio-de-janeiro-rj/super-prix---maracana-maracana"
   }

3. Create collection in database ifood as named produtos.

Run crawler:

npm start <str:MONGODB_URI_CONN> <int:ID_MERCADO:optional>

P.S.: Get products of all mercados collection if not passed argument ID_MERCADO.

To analyze prices of same product in all markets (aggregate framework):

[
  {
    $group:
      {
        _id: {
          nome: "$nome",
          id_mercado: "$id_mercado",
        },
        preco: {
          $max: "$preco",
        },
      },
  },
  {
    $lookup:
      {
        from: "mercados",
        localField: "_id.id_mercado",
        foreignField: "id",
        as: "mercado",
      },
  },
  {
    $replaceRoot:
      {
        newRoot: {
          _id: ObjectId(),
          nome: "$_id.nome",
          cidade_mercado: {
            $arrayElemAt: ["$mercado.cidade", 0],
          },
          bairro_mercado: {
            $arrayElemAt: ["$mercado.bairro", 0],
          },
          nome_mercado: {
            $arrayElemAt: ["$mercado.nome", 0],
          },
          preco: "$preco",
        },
      },
  },
  {
    $match:
      {
        //nome: /.*Óleo de Soja Soya 900ml.*/
        nome: /.*Feijao Carioca Vapza 500g.*/,
      },
  },
  {
    $sort:
      {
        preco: 1,
      },
  },
]