Convert the CSV of an item into a mongodb array

I have a csv file for each item in my store. Each csv contains the sales of the related item: date, sales,...

I would like to import each csv into a related document:

    item{
    title: string,
    description: string,
    sales: [{date1, sales1},{date2, sales2},... ]
    }

I would prefer a solution involving node.js if someone thinks about doing a loop.

Thanks for the help