progress on ex Z4

src/exercises/ex_z4/Bidder.java

@@ -1,30 +1,53 @@
 package exercises.ex_z4;
 
+import exercises.Utils;
+
 import java.util.Random;
 import java.util.ArrayList;
 import java.util.List;
 
+import static exercises.ex_z4.AuctionState.BIDDING;
+import static exercises.ex_z4.AuctionState.FINISHED;
+
 public class Bidder implements Runnable {
     private static int nextId = 0;
     private final String name;
     private final int id;
     private final List<Item> items = new ArrayList<>();
     private Double lastBid = null;
+    private final Auctioneer auctioneer;
 
-    public Bidder(String name) {
+    public Bidder(String name, Auctioneer auctioneer) {
         this.name = name;
         this.id = nextId++;
+        this.auctioneer = auctioneer;
     }
 
     @Override
     public void run() {
-        while(true){
-            Random rand = new Random();
-            double addon = rand.nextDouble(500);
-            lastBid += addon;
+        while (true) {
+            AuctionState state = auctioneer.getAuctionState();
+            if (state == BIDDING) {
+                Random rand = new Random();
+                double addon = rand.nextDouble(500);
+                double base = auctioneer.getMaximumBid().amount();
+                lastBid = base + addon;
+                auctioneer.placeBid(new Bid(this, lastBid));
+                try {
+                    Utils.randomSleep(100, 5000);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+            } else if (state == FINISHED) {
+                break;
+            }
         }
     }
 
+    public void addItem(Item item){
+        items.add(item);
+    }
+
     public String getName() {
         return name;
     }