add new StockController to handle stock movement

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/Controller/StockController.java

@@ -0,0 +1,58 @@
+package edu.ntnu.idi.idatt2003.gruppe42.Controller;
+
+import edu.ntnu.idi.idatt2003.gruppe42.Model.Stock;
+
+import java.math.BigDecimal;
+import java.util.Random;
+
+public class StockController {
+  private Stock stock;
+  private int timeframe;
+  private int trend;
+  private int delay;
+  private int time;
+  private Random random;
+  private double timeMultiplier;
+  private BigDecimal price;
+  private BigDecimal startPrice;
+  private BigDecimal offset;
+  private BigDecimal priceChange;
+
+
+  public StockController(Stock stock) {
+    this.stock = stock;
+    time = 0;
+    random = new Random();
+    timeMultiplier = (random.nextDouble() + 0.1) / 20;
+    startPrice = stock.getSalesPrice();
+
+    price = startPrice;
+    priceChange = new BigDecimal(random.nextInt(startPrice.intValue()/2));
+  }
+
+  public BigDecimal updatePrice() {
+    BigDecimal marketFluctuation = BigDecimal.valueOf(Math.sin(timeMultiplier * time))
+            .multiply(priceChange)
+            .add(startPrice);
+
+    double speculatorFluctuation = random.nextDouble(2) - 1;
+    offset = BigDecimal.valueOf(speculatorFluctuation*30);
+
+    time += 1;
+    price = marketFluctuation;
+
+    return price.add(offset);
+  }
+
+  public void handleEvent() {
+
+  }
+
+  public boolean isTrajectorySteep() {
+    return true;
+  }
+
+  public boolean isDelay() {
+    return delay > 0;
+  }
+}

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/Model/Stock.java

@@ -1,5 +1,6 @@
 package edu.ntnu.idi.idatt2003.gruppe42.Model;
 
+import edu.ntnu.idi.idatt2003.gruppe42.Controller.StockController;
 import edu.ntnu.idi.idatt2003.gruppe42.View.Views.Components.StockGraph;
 import java.math.BigDecimal;
 import java.util.ArrayList;
@@ -11,7 +12,7 @@ public class Stock {
   private final String company;
   private StockGraph stockGraph;
   private List<BigDecimal> prices = new ArrayList<>();
-
+  private StockController stockController;
   /** Constructs a new stock. */
   public Stock(
       final String symbol,
@@ -21,6 +22,7 @@ public Stock(
     this.symbol = symbol;
     this.company = company;
     prices.add(salesPrice);
+    stockController = new StockController(this);
   }
 
   /** @return the symbol. */
@@ -70,9 +72,7 @@ public BigDecimal getLatestPriceChange() {
 
   /** Updates the price. */
   public void updatePrice() {
-    BigDecimal oldPrice = getSalesPrice();
-    BigDecimal newPrice = oldPrice.add(new BigDecimal("1"));
-    newPrice = newPrice.max(BigDecimal.ZERO);
+    BigDecimal newPrice = stockController.updatePrice();
     prices.add(newPrice);
   }