From 88a7f7813e02fbfdcb2175f4285dda08920cb17d Mon Sep 17 00:00:00 2001
From: uykek <uykek@student.kit.edu>
Date: Tue, 26 May 2020 20:15:33 +0200
Subject: [PATCH] Add methods which generate a fixed sudoku based on the
 current date

---
 .../controller/NewLevelManager.java                | 12 ++++++++++++
 .../controller/QQWingController.java               | 14 ++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/NewLevelManager.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/NewLevelManager.java
index b74319b..b656bb5 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/NewLevelManager.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/NewLevelManager.java
@@ -15,6 +15,9 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Random;
@@ -75,6 +78,15 @@ public class NewLevelManager {
         return false;
     }
 
+    public int[] loadDailySudoku() {
+        DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
+        Date date = new Date();
+        String toHash = "Sudoku/.PrivacyFriendly/." + dateFormat.format(date);
+
+        QQWingController controller = new QQWingController();
+        return controller.generateFromSeed(toHash.hashCode());
+    }
+
     public int[] loadLevel(GameType type, GameDifficulty diff) {
         Level level = dbHelper.getLevel(diff, type);
         dbHelper.deleteLevel(level.getId());
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/QQWingController.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/QQWingController.java
index 2a2f1d4..2f44929 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/QQWingController.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/QQWingController.java
@@ -53,6 +53,20 @@ public class QQWingController {
         return generated;
     }
 
+    public int[] generateFromSeed(int seed) {
+        generated.clear();
+
+        QQWing generator = new QQWing(GameType.Default_9x9, GameDifficulty.Unspecified);
+        generator.setRandom(seed);
+        generator.setRecordHistory(true);
+        generator.generatePuzzle();
+
+        generated.add(generator.getPuzzle());
+        opts.gameType = GameType.Default_9x9;
+        opts.gameDifficulty = generator.getDifficulty();
+        return generated.poll();
+    }
+
     public int[] solve(GameBoard gameBoard) {
 
         level = new int[gameBoard.getSize()*gameBoard.getSize()];