Add main program loop

src/main/java/org/example/Main.java

@@ -1,7 +1,60 @@
 package org.example;
 
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Scanner;
+
 public class Main {
     public static void main(String[] args) {
+        HashMap<Product, Integer> products = loadProductsFromFile("resources/produkte.csv");
+        Shop shop = new Shop(products);
+        TUI tui = new TUI(shop);
+        Scanner scanner = new Scanner(System.in);
+        while (true) {
+            System.out.print("> ");
+            String input = scanner.nextLine();
+            tui.processInput(input);
+            if (tui.exit) {
+                break;
+            }
+        }
+    }
 
+    public static HashMap<Product, Integer> loadProductsFromFile(String path) {
+        HashMap<Product, Integer> products = new HashMap<>();
+        ArrayList<String> lines;
+        try {
+            lines = readFile(path);
+        } catch (FileNotFoundException e) {
+            lines = new ArrayList<>();
+        }
+        for (String line : lines) {
+            String[] tokens = line.split(",");
+            int id = Integer.parseInt(tokens[0]);
+            String name = tokens[1];
+            float weight = Float.parseFloat(tokens[2]);
+            float price = Float.parseFloat(tokens[3]);
+            float vatPortion = Float.parseFloat(tokens[4]);
+            int stock = Integer.parseInt(tokens[5]);
+            products.put(new Product(id, name, weight, price, vatPortion), stock);
+        }
+        return products;
+    }
+
+    public static ArrayList<String> readFile(String path) throws FileNotFoundException {
+
+        ArrayList<String> lines = new ArrayList<>();
+        Scanner sc = new Scanner(new File(path));
+
+        while (sc.hasNextLine()) {
+            lines.add(sc.nextLine());
+        }
+
+        sc.close();
+
+        return lines;
     }
 }