Added missing files

src/com/patryk/mathdoku/GameContext.java

-package com.patryk.mathdoku;
-
-import com.patryk.mathdoku.actions.*;
-import com.patryk.mathdoku.cageData.CageData;
-import com.patryk.mathdoku.cageData.DataFormatException;
-import com.patryk.mathdoku.errorChecking.UserErrorChecker;
-import com.patryk.mathdoku.util.BoardPosVec;
-
-/**
- * Represents one status of the playing of the game e.g. the cage data, what the user has entered
- */
-public class GameContext {
-
-    private int boardWidth;
-
-    private CageData cageData;
-    private UserData userData;
-    private UserErrorChecker userErrorChecker;
-
-    StackActionRecorder<Action> actionRecorder;
-
-    public StackActionRecorder<Action> getActionRecorder() {
-        return actionRecorder;
-    }
-
-
-    UserData.ChangeListener updateErrorState = (UserData.ChangeListener.ChangeData changeData) -> {
-        userErrorChecker.onGridChange(changeData);
-    };
-
-
-    public GameContext(String data) throws DataFormatException {
-        cageData = new CageData(data);
-        this.boardWidth = cageData.getWidth();
-        BoardPosVec.setBoardWidth(boardWidth);
-        Action.setGameContext(this);
-        userData = new UserData(boardWidth);
-        actionRecorder = new StackActionRecorder<>(5);
-        //userData.fill();
-
-        userErrorChecker = new UserErrorChecker(boardWidth, userData, cageData);
-
-        userData.addChangeListener(updateErrorState);
-
-    }
-
-
-
-
-    public CageData getCageData() {
-        return cageData;
-    }
-
-    public UserData getUserData() {
-        return userData;
-    }
-
-
-    public void setValueAtCell(BoardPosVec cell, int value, boolean record ) {
-        int oldValue = userData.getValueAtCell(cell);
-        userData.setValueAtCell(cell, value);
-
-        if (record)
-            actionRecorder.record(new CellValueChangeAction(cell, oldValue, value));
-    }
-
-    public void clear(boolean record) {
-        UserData copy = UserData.move(userData);
-
-        if(record) {
-            actionRecorder.record(new ClearAction(copy));
-        }
-
-    }
-
-    public int getBoardWidth() {
-        return boardWidth;
-    }
-
-    public void undo() {
-        actionRecorder.undo().undo();
-    }
-
-    public void redo() {
-        actionRecorder.redo().redo();
-        UndoRedoButtonManager.me().onRedoButtonPressed();
-    }
-
-
-    public UserErrorChecker getErrorChecker() {
-        return userErrorChecker;
-    }
-
-
-    public boolean isWon() {
-        if (userData.isFull()) {
-            if (userErrorChecker.noErrors()) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-}
\ No newline at end of file