Added File Manager. Not working yet.

app/src/main/java/tu_darmstadt/sudoku/controller/FileManager.java

@@ -1,17 +1,76 @@
 package tu_darmstadt.sudoku.controller;
 
+import android.content.Context;
+import android.provider.MediaStore;
+import android.util.Log;
+
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.StringBufferInputStream;
+
+import tu_darmstadt.sudoku.game.GameBoard;
+
 /**
  * Created by Chris on 16.11.2015.
  */
 public class FileManager {
 
-    FileManager() {}
+    Context context;
+    private static String savesFile = "saves.txt";
+    private static String highscoresFile = "highscores.txt";
 
-    void doSomething() {
-        //File f = new File("./level/sudoku.txt");
+    FileManager(Context context) {
+        this.context = context;
+    }
+
+    public String loadGameState() {
+        File dir = context.getFilesDir();
+
+        File file = new File(dir, savesFile);
+
+        byte[] bytes = new byte[(int)file.length()];
+
+        try {
+            FileInputStream stream = new FileInputStream(file);
+            try {
+                stream.read(bytes);
+            } finally {
+                stream.close();
+            }
+        } catch(IOException e) {
+            Log.e("File Manager", "Could not load game. IOException occured.");
+        }
+        String saves = new String(bytes);
+        String[] levels = saves.split("###");
+        for(String level : levels) {
+            String[] values = level.split("|");
+            int size = Integer.valueOf(values[0]);
+
+        }
 
 
+        return saves;
+    }
 
+    public void saveGameState(GameController controller) {
+        String level = controller.getStringRepresentation();
+
+        File dir = context.getFilesDir();
+
+        File file = new File(dir, savesFile);
+
+        try {
+            FileOutputStream stream = new FileOutputStream(file);
+            try {
+                stream.write(level.getBytes());
+            } finally {
+                stream.close();
+            }
+        } catch(IOException e) {
+            Log.e("File Manager", "Could not save game. IOException occured.");
+        }
     }
 }

app/src/main/java/tu_darmstadt/sudoku/controller/GameController.java

@@ -10,6 +10,7 @@ import tu_darmstadt.sudoku.game.CellConflictList;
 import tu_darmstadt.sudoku.game.GameBoard;
 import tu_darmstadt.sudoku.game.GameCell;
 import tu_darmstadt.sudoku.game.GameType;
+import tu_darmstadt.sudoku.game.ICellAction;
 import tu_darmstadt.sudoku.game.solver.Solver;
 import tu_darmstadt.sudoku.game.solver.ISolver;
 
@@ -346,5 +347,57 @@ public class GameController {
 //            l.onModelChanged();
 //        }
 //    }
+public String getStringRepresentation() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("###"); // TODO add some game information
+
+    sb.append(gameType);
+    sb.append("|");
+
+    // add every fixed cell
+    gameBoard.actionOnCells(new ICellAction<StringBuilder>() {
+        @Override
+        public StringBuilder action(GameCell gc, StringBuilder existing) {
+            if (gc.isFixed()) {
+                existing.append(gc.getValue());
+            } else {
+                existing.append(0);
+            }
+            return existing;
+        }
+    }, sb);
+
+    // add a seperator
+    sb.append("|");
+
+    // Add every set cell
+    gameBoard.actionOnCells(new ICellAction<StringBuilder>() {
+        @Override
+        public StringBuilder action(GameCell gc, StringBuilder existing) {
+            if (gc.isFixed()) {
+                existing.append(0);
+            } else {
+                existing.append(gc.getValue());
+            }
+            return existing;
+        }
+    }, sb);
+
+    // add a seperator
+    sb.append("|");
+
+    // now add notes
+    gameBoard.actionOnCells(new ICellAction<StringBuilder>() {
+        @Override
+        public StringBuilder action(GameCell gc, StringBuilder existing) {
+            for (Boolean b : gc.getNotes()) {
+                existing.append(b);
+            }
+            return existing;
+        }
+    }, sb);
+    sb.append("\n\n");
+    return sb.toString();
+}
 
 }

app/src/main/java/tu_darmstadt/sudoku/game/GameBoard.java

@@ -205,4 +205,5 @@ public class GameBoard implements Cloneable {
         }
         return sb.toString();
     }
+
 }