OnlineShop/shop/fassade/OnlineShopSystem.java

package fassade;

import domain.Product;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class OnlineShopSystem {
    private ArrayList<Product> storage;

    public OnlineShopSystem(String filePath) throws FileNotFoundException {
        storage = new ArrayList<Product>();

        loadProducts(filePath);
    }

    public String listAllProducts(){
        StringBuilder sb = new StringBuilder();

        for (Product product : storage){
            String name = product.getName();
            String description = product.getDescription();

            sb.append(String.format("%s - %s \n", name, description));

        }

        return sb.toString();
    }

    public ArrayList<String> getSearchResult(String searchQueue){
        ArrayList<Product> matchingProducts = new ArrayList<>();

        for (Product product : storage){
            if (product.getName().contains(searchQueue) || product.getDescription().contains(searchQueue)){
                matchingProducts.add(product);
            }
        }

        System.out.printf("amount matches: %d \n", matchingProducts.size());

        ArrayList<String> matchingStrings = new ArrayList<>();

        if (matchingProducts.isEmpty()) {
            matchingStrings.add(String.format("No matches for your search: %s \n", searchQueue));
        }

        StringBuilder sb = new StringBuilder();

        sb.append(String.format("%d match(es) found: \n", matchingProducts.size()));
        for (Product product : matchingProducts){

            sb.append(String.format("%s - %s \n", product.getName(), product.getDescription()));
            sb.append(String.format("Price: %d€, Weight: %dg, Stock: %d", product.getWeight(), product.getWeight(), product.getBestand()));

            matchingStrings.add(sb.toString());
            sb = new StringBuilder();
            }

        return matchingStrings;
    }

    private void loadProducts(String filePath) throws FileNotFoundException {
        Scanner sc = new Scanner(new File(filePath));

        int counter = 0;

        while (sc.hasNextLine()) {
            String product = sc.nextLine();

            if (counter == 0){
                counter ++;
                continue;
            }

            String[] rows = product.split(";");
            rows[2] = rows[2].replaceAll(",", ".");
            rows[3] = rows[3].substring(0, rows[3].indexOf(","));
            rows[4] = rows[4].substring(0, rows[4].indexOf(","));

            Product currentProduct = new Product(rows[0], rows[1], Float.parseFloat(rows[2]), Integer.parseInt(rows[3]), Integer.parseInt(rows[4]));

            storage.add(currentProduct);

            counter ++;
        }
    }
}