Merge pull request #87 from 2AA4-W24/varun

added compass to keep track of current drone heading

src/main/java/ca/mcmaster/se2aa4/island/team101/AirDecision.java

@@ -9,6 +9,7 @@ public class AirDecision extends Decision {
     // Command object
     Command command = new Command();
     Response response; // will be initialized accordidng to type -> using polymorphism
+    Compass direction = new Compass(); //NEED TO INITIALIZE HEADING
 
     private int counter = 0;
 

src/main/java/ca/mcmaster/se2aa4/island/team101/Compass.java

@@ -0,0 +1,49 @@
+package ca.mcmaster.se2aa4.island.team101;
+
+public class Compass {
+
+    private String direction;
+
+    protected static final String NORTH = "N";
+    protected static final String EAST = "E";
+    protected static final String SOUTH = "S";
+    protected static final String WEST = "W";
+
+    /*
+    public Compass(String init_direction){      // INITIALIZE HEADING HERE
+        this.direction = init_direction;
+    }
+    */
+
+    public String left(){
+        switch (direction){
+            case NORTH:
+                direction = WEST;
+            case SOUTH:
+                direction = EAST;
+            case EAST:
+                direction = NORTH;
+            case WEST:
+                direction = SOUTH;
+        }
+        return direction;
+    }
+
+    public String right(){
+        switch (direction){
+            case NORTH:
+                direction = EAST;
+            case SOUTH:
+                direction = WEST;
+            case EAST:
+                direction = SOUTH;
+            case WEST:
+                direction = NORTH;
+        }
+        return direction;
+    }
+
+    public String forward(){
+        return direction;
+    }
+}