Simplified and generalized checkBarriers()

src/SuperSnakeBot.java

@@ -1,10 +1,9 @@
 public class SuperSnakeBot extends Bot{
     private String moves = "";
     private char previousTurn = '<';
-    boolean frontIsBlocked;
-    boolean leftIsBlocked;
-    boolean rightIsBlocked;
+    boolean frontIsBlocked, leftIsBlocked, rightIsBlocked;
     private int spiralNumber = 0;
+    private char spiralDirection = '>';
     private boolean goesForward = true;
     public static void main(String[] args) {
         Bot superSnakeBot = new SuperSnakeBot(args);
@@ -27,11 +26,13 @@ public class SuperSnakeBot extends Bot{
         return nextMove;
     }
 
-    private void checkBarriers(View view){
+    private void checkBarriers(View view) {
         int centerCoordinates = view.width / 2;
+        int centerIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates);
+
         int frontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 1);
-        int leftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 1 , centerCoordinates);
-        int rightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 1, centerCoordinates);
+        int leftIndex = centerIndex - 1;
+        int rightIndex = centerIndex + 1;
 
         frontIsBlocked = view.data.charAt(frontIndex) == '*';
         leftIsBlocked = view.data.charAt(leftIndex) == '*';
@@ -40,7 +41,7 @@ public class SuperSnakeBot extends Bot{
 
     private char checkMove(char move) throws Exception {
         if(move == '^' && frontIsBlocked){
-            resetMoves();
+            resetMovesSequence();
 
             if(leftIsBlocked) move = '>';
             else if(rightIsBlocked) move = '<';
@@ -51,7 +52,7 @@ public class SuperSnakeBot extends Bot{
         return move;
     }
 
-    private void saveMove(char move){
+    private void saveMove(char move) {
         if(move == '<' || move == '>'){
             previousTurn = move;
         }
@@ -60,7 +61,7 @@ public class SuperSnakeBot extends Bot{
     private char walkBySpiral(View view) {
         if (moves.isEmpty()) {
             spiralNumber++;
-            moves += "^".repeat(view.width * spiralNumber) + ">" + "^".repeat(view.width * spiralNumber) + ">";
+            moves += "^".repeat(view.width * spiralNumber) + spiralDirection + "^".repeat(view.width * spiralNumber) + spiralDirection;
         }
         char nextMove = moves.charAt(0);
         moves = moves.substring(1);
@@ -69,7 +70,9 @@ public class SuperSnakeBot extends Bot{
 
     private char walkByColumns(View view) {
         if(moves.isEmpty()){
-            moves = "^".repeat(28);
+            int steps = 32 - view.width;
+
+            moves = "^".repeat(steps);
             moves += (goesForward ? ">" + "^".repeat(view.width) + ">" : "<" + "^".repeat(view.width) + "<");
             goesForward = !goesForward;
         }
@@ -79,37 +82,71 @@ public class SuperSnakeBot extends Bot{
     }
 
     private char goToStone(View view) {
-        resetMoves();
+        resetMovesSequence();
 
-        int centerCoordinates = view.width / 2;
+        int[] frontIndexes = getFrontIndexes(view);
+        int[] leftIndexes = getLeftIndexes(view);
+        int[] rightIndexes = getRightIndexes(view);
 
-        int leftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 1, centerCoordinates);
-        int farLeftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 2, centerCoordinates);
+        for (int index : frontIndexes) {
+            if (view.data.charAt(index) == '@') return '^';
+        }
 
-        int rightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 1, centerCoordinates);
-        int farRightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 2, centerCoordinates);
+        for (int index : leftIndexes) {
+            if (view.data.charAt(index) == '@') return '<';
+        }
 
-        int frontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 1);
-        int farFrontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 2);
-
-        if(view.data.charAt(frontIndex) == '@' || view.data.charAt(farFrontIndex) == '@'){
-            return '^';
-        }else if(view.data.charAt(leftIndex) == '@' || view.data.charAt(farLeftIndex) == '@'){
-            return '<';
-        }else if(view.data.charAt(rightIndex) == '@' || view.data.charAt(farRightIndex) == '@'){
-            return '>';
-        }else {
-            return '^';
+        for (int index : rightIndexes) {
+            if (view.data.charAt(index) == '@') return '>';
+        }
+
+        return '^';
+    }
+
+    private int[] getLeftIndexes(View view) {
+        int center = view.width / 2;
+        int[] leftIndexes = new int[center];
+        int index = 0;
+
+        for (int col = 0; col < center; col++) {
+            leftIndexes[index++] = getCharIndexFromCoordinates(view.width, col, center);
         }
+
+        return leftIndexes;
+    }
+
+    private int[] getRightIndexes(View view) {
+        int center = view.width / 2;
+        int[] rightIndexes = new int[center];
+        int index = 0;
+
+        for (int col = center + 1; col < view.width; col++) {
+            rightIndexes[index++] = getCharIndexFromCoordinates(view.width, col, center);
+        }
+
+        return rightIndexes;
+    }
+
+    private int[] getFrontIndexes(View view) {
+        int center = view.width / 2;
+        int[] frontIndexes = new int[center];
+        int index = 0;
+
+        for (int row = 0; row < center; row++) {
+            frontIndexes[index++] = getCharIndexFromCoordinates(view.width, center, row);
+        }
+
+        return frontIndexes;
     }
 
-    private int getCharIndexFromCoordinates(int width, int x, int y){
+    private int getCharIndexFromCoordinates(int width, int x, int y) {
         return width * y + x;
     }
 
-    private void resetMoves() {
+    private void resetMovesSequence() {
         moves = "";
         spiralNumber = 0;
+        spiralDirection = (spiralDirection == '>') ? '<' : '>';
         goesForward = true;
     }
 }