Safaalsibania submission branch

src/main/java/com/agileoracleseval/slitheringeval/safaAlsibani/MoveSnake.java

@@ -0,0 +1,95 @@
+package com.agileoracleseval.slitheringeval.safaAlsibani;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.LinkedList;
+import java.util.Queue;
+
+public class MoveSnake {
+    public static void main(String[] args) throws Exception {
+
+        Path file = Path.of("src/main/java/com/agileoracleseval/slitheringeval/safaAlsibani/map.txt");
+        String data = Files.readString(file);
+        String[] lines = data.split("\\R");
+
+        char[][] grid = new char[lines.length][lines[0].length()];
+        for (int i = 0; i < lines.length; i++) {
+            grid[i] = lines[i].toCharArray();
+        }
+
+        // snake body
+        Queue<int[]> snake = new LinkedList<>();
+
+        for (int i = 0; i < grid.length; i++) {
+            for (int j = 0; j < grid[i].length; j++) {
+                if (grid[i][j] == 'o') {
+                    snake.add(new int[]{i, j});
+                }
+            }
+        }
+
+        // head
+        int[] head = ((LinkedList<int[]>) snake).getLast();
+
+        // input
+        String direction = args[0];
+        int steps = Integer.parseInt(args[1]);
+
+        // check invalid direction
+        if (direction.equals("down")) {
+            System.out.println("The only open directions are up, left and right");
+            return;
+        }
+
+        // the movement
+        for (int s = 0; s < steps; s++) {
+
+            int newRow = head[0];
+            int newCol = head[1];
+
+            if (direction.equals("right")) newCol++;
+            else if (direction.equals("left")) newCol--;
+            else if (direction.equals("up")) newRow--;
+
+            // wall collision
+            if (newRow < 0 || newRow >= grid.length ||
+                    newCol < 0 || newCol >= grid[0].length) {
+                System.out.println("Game Over - wall");
+                return;
+            }
+
+            //  body collision
+            for (int[] part : snake) {
+                if (part[0] == newRow && part[1] == newCol) {
+                    System.out.println("Game Over - Hit itself");
+                    return;
+                }
+            }
+
+            // update snake
+            int[] tail = snake.peek();
+            head = new int[]{newRow, newCol};
+
+            snake.add(head);
+            snake.remove();
+
+            // update grid
+            grid[tail[0]][tail[1]] = '-';
+            grid[newRow][newCol] = 'o';
+
+            // print
+            printGrid(grid);
+            System.out.println();
+        }
+    }
+
+    public static void printGrid(char[][] grid) {
+        for (int i = 0; i < grid.length; i++) {
+            for (int j = 0; j < grid[i].length; j++) {
+                System.out.print(grid[i][j]);
+            }
+            System.out.println();
+        }
+    }
+}
+

src/main/java/com/agileoracleseval/slitheringeval/safaAlsibani/map.txt

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+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - o o o o o - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -
+- - - - - - - - - - - - - - -