File Parser for levels (#18)

Co-authored-by: Debucquoy Anthony (tonitch) <debucquoy.anthony@gmail.com>
Reviewed-on: #18
Reviewed-by: Mat_02 <diletomatteo@gmail.com>

app/src/main/java/school_project/Shape.java

@@ -1,12 +1,14 @@
 package school_project;
 
 
+import java.io.Serializable;
+
 /**
  * Base class for everything that is a shape kind, like map and pieces
  * it contain a matrix of boolean where the shape is defined by the true's
  */
-public class Shape {
-
+public class Shape implements Serializable, Cloneable{
+    
     protected boolean[][] matrix;
     protected int height, width;
 
@@ -41,4 +43,17 @@ public class Shape {
     public boolean[][] getShape() {
         return matrix;
     }
-}
+
+    @Override
+    public String toString() {
+        String ret = "";
+        for (boolean[] row : matrix) {
+            for (boolean el : row) {
+                if(el) ret = ret.concat("⬛");
+                else ret = ret.concat("⬜");
+            }
+            ret = ret.concat("\n");
+        }
+        return ret;
+    }
+}