package com.bookshop.solid.srp;

import com.bookshop.domain.Book;
import com.bookshop.domain.Customer;
import java.math.BigDecimal;
import java.util.List;

/** Responsibility 1: what was bought and what it adds up to. Nothing else. */
public record Receipt(Customer customer, List<Book> books) {

    public BigDecimal total() {
        return books.stream().map(Book::price).reduce(BigDecimal.ZERO, BigDecimal::add);
    }
}

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