feat: adds comments to make code readable and understanding thought p…

…rocess for lesson_14 EcommerceSystem.java - Joseph Caballero

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/EcommerceSystem.java

@@ -19,6 +19,15 @@ public void addProduct(String productId, String name) {
 
   public String placeOrder(String productId, int quantity) throws ProductNotFoundException {
     Product product = products.get(productId);
+    /*the reason why i put the throw here is due to the fact that the product is being declared and we know in the test cases 
+     * that we are given a product id, what we dont know is if thaat productId is correct so technically speaking we should check
+     * if the productId is matched up to the hashmap at all using get and if it doesnt exist then product will be null because no such key exists
+     * instead of trying to put it in every single instance we see an order id or product id our test cases check to see if the given 
+     * input is even available for us to grab not if there is any input at all since that itself in my opinion would be front end and not us 
+     * that would handle that sort of thing before it reaches this point
+     * 
+     * If you need me to delete comments I can i just wrote this out incase people look at any pr's for their own reasoning or what not
+     */
     if (product == null) {
       throw new ProductNotFoundException("Product with ID " + productId + " not found");
     }
@@ -35,6 +44,10 @@ public String checkOrderStatus(String orderId)
       throws OrderNotFoundException, ProductNotFoundException {
 
     Order order = orders.get(orderId);
+    // Since order is set at this exact moment all we need to do is check if the given id is in the hashmap and if it isnt we know 
+    //that it would return a null value if no such key exists, hence why we would see if order == null and if it is throw that error
+    //we do this instead of having an error at each exact moment because we know in the test cases we are given an orderId we just need to make sure
+    //on our end that it is correct, not if it exists.
     if (order == null) {
       throw new OrderNotFoundException("Order with ID " + orderId + " not found");
     }