Finishing SaveLevel without saved data

app/src/main/java/school_project/Parsers/BinaryParser.java

@@ -10,16 +10,6 @@ import java.util.Arrays;
 
 public class BinaryParser implements FileParser {
 
-    @Override
-    public Map getSavedData(File file) {
-        return null;
-    }
-
-    @Override
-    public void saveLevelData(File file, Map levelData) throws IOException {
-
-    }
-
     /**
      * check if the file is a binary file suited for parsing
      * @return true if it is a binary File
@@ -47,7 +37,7 @@ public class BinaryParser implements FileParser {
     }
 
     @Override
-    public Map getLevel(File file) throws IOException {
+    public Map getLevel(File file, boolean saved_data) throws IOException {
         Map ret;
 
         FileInputStream fileStream = new FileInputStream(file);
@@ -58,13 +48,34 @@ public class BinaryParser implements FileParser {
 
         ret.addPiece(ExtractPiecesFromLevelData(level_data));
         
+        if(saved_data)
+            // TODO: 3/23/23 getSavedDat 
+
         fileStream.close();
         return ret;
     }
 
     @Override
-    public void saveLevel(File file, Map levelData) throws FileNotFoundException {
+    public void saveLevel(File file, Map level_data, boolean save_data) throws FileNotFoundException {
-//        byte[] data = new byte[];
+        int byteSize = getByteSizeForMap(level_data, false);
+        byte[] data = new byte[byteSize];
+        int i = 0;
+        data[i++] = 'S'; data[i++] = 'M'; data[i++] = 'S';
+        data[i++] = (byte) level_data.getWidth(); data[i++] = (byte) level_data.getHeight();
+        for(byte b : BuildByteFromMatrix(level_data.getShape())){
+            data[i++] = b;
+        }
+        data[i++] = (byte) level_data.getPieces().size();
+        for (Piece p : level_data.getPieces()) {
+            data[i++] = Bitwise.NibbleToByte((byte) p.getWidth(), (byte) p.getHeight());
+            for(byte b : BuildByteFromMatrix(p.getShape())){
+                data[i++] = b;
+            }
+        }
+        if (save_data){
+            // TODO: 3/23/23 Save Data 
+        }
+        data[i++] = 'S'; data[i++] = 'M'; data[i++] = 'E';
     }
 
     /**
@@ -126,6 +137,30 @@ public class BinaryParser implements FileParser {
         return BuildMatrixFromBytes(map_width, map_height, map_data);
     }
 
+    /**
+     * take a boolean matrix and build an array of byte following the specs of the parser
+     * @param shape bolean matrix where true are 1 and false are 0
+     * @return byte array with each element compiled for file format
+     */
+    private static byte[] BuildByteFromMatrix(boolean[][] shape){
+        int width = shape[0].length , height = shape.length;
+        boolean[] list = new boolean[width * height];
+        for (int x = 0; x < shape.length; x++) {
+            for (int y = 0; y < shape[x].length; y++) {
+                list[x * shape[x].length + y] = shape[x][y];
+            }
+        }
+        byte[] ret = new byte[width * height  / 8 + width * height % 8 == 0 ? 0 : 1 ];
+        for (int i = 0; i < ret.length; i++) {
+            byte b = 0;
+            for (int b_count = i * 8; b_count < i * 8 + 8; b_count++) {
+                b = (byte) ((b << 1) | (list[b_count] ? 1 : 0));
+            }
+            ret[i] = b;
+        }
+        return ret;
+    }
+
     /**
      * Build a boolean Matrix From a byte array
      * Each Byte is composed of 8 bit, each bit is 1 or 0

app/src/main/java/school_project/Parsers/FileParser.java

@@ -24,17 +24,5 @@ public interface FileParser {
      * @param file the file where to save
      * @param levelData the map to save
      */
-    void saveLevel(File file, Map levelData) throws FileNotFoundException;
+    void saveLevel(File file, Map levelData, boolean save_data) throws FileNotFoundException;
-
-    /**
-     * Save Map to a file with all it's data
-     * @param file the file where to save
-     * @param levelData the map to save
-     */
-    void saveLevelData(File file, Map levelData) throws IOException;
-
-
-
-    // TODO: 3/18/23 tonitch: Add getSavedData, for when piece could be added to map file
-    
 }

app/src/main/java/school_project/Utils/Bitwise.java

@@ -27,4 +27,14 @@ public class Bitwise {
         ret[1] = (byte) (in & 15); // apply the mask '00001111'
         return ret;
     }
+
+    /**
+     * Transform 2 byte into 1 with a left part ( 4 bits ) and a right part ( 4 bits)
+     * @param left first 4 bits
+     * @param right last 4 bits
+     * @return concatenated byte
+     */
+    public static byte NibbleToByte(byte left, byte right){
+        return (byte) ((left << 4) | right);
+    }
 }