feat: A lot of new features

backend/src/main/java/cz/jzitnik/chronos/controllers/CharacterController.java

@@ -0,0 +1,88 @@
+package cz.jzitnik.chronos.controllers;
+
+import cz.jzitnik.chronos.entities.Item;
+import cz.jzitnik.chronos.interactions.InteractionService;
+import cz.jzitnik.chronos.payload.requests.InteractionRequest;
+import cz.jzitnik.chronos.payload.responses.InteractionResponse;
+import cz.jzitnik.chronos.payload.responses.TakeItemsResponse;
+import cz.jzitnik.chronos.payload.responses.UnifiedResponse;
+import cz.jzitnik.chronos.repository.CharacterRepository;
+import cz.jzitnik.chronos.repository.PlayerRepository;
+import cz.jzitnik.chronos.utils.anotations.CheckUser;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@CrossOrigin(origins = "*", maxAge = 3600)
+@RestController
+@RequestMapping("/game/characters")
+public class CharacterController {
+    @Autowired
+    private InteractionService interactionService;
+
+    @Autowired
+    private PlayerRepository playerRepository;
+
+    @Autowired
+    private CharacterRepository characterRepository;
+
+    @PostMapping("/interact")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<InteractionResponse, Error>> interact(@RequestParam String playerKey, @RequestBody InteractionRequest interactionRequest) {
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+
+        var characterOptional = characterRepository.findById(interactionRequest.getCharacterId());
+
+        if (characterOptional.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(UnifiedResponse.failure(null));
+        }
+        if (!characterOptional.get().getRoom().equals(player.getCurrentRoom())) {
+            return ResponseEntity.badRequest().body(UnifiedResponse.failure(null));
+        }
+        if (characterOptional.get().isInteractedWith()) {
+            return ResponseEntity.noContent().build();
+        }
+
+        var interaction = characterOptional.get().getInteraction();
+
+        var interactionFunc = interactionService.mapInteraction(interaction);
+
+        var interactionResponse = interactionFunc.apply(player, characterOptional.get(), interactionRequest.getData());
+
+        return ResponseEntity.ok(
+                UnifiedResponse.success(interactionResponse)
+        );
+    }
+
+    @PostMapping("/take_items")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<TakeItemsResponse, Error>> takeItems(@RequestParam String playerKey, @RequestParam Long characterId) {
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+
+        var characterOptional = characterRepository.findById(characterId);
+
+        if (characterOptional.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(UnifiedResponse.failure(null));
+        }
+
+        var character = characterOptional.get();
+        if (!character.getRoom().equals(player.getCurrentRoom())) {
+            return ResponseEntity.badRequest().body(UnifiedResponse.failure(null));
+        }
+
+        if (character.getPlayersWhoSaw().contains(player)) {
+            return ResponseEntity.ok(UnifiedResponse.success(TakeItemsResponse.ALREADY_TAKEN));
+        }
+
+        for (Item item : character.getInventory()) {
+            var itemClone = new Item(item.getItemType(), player);
+            player.addItem(itemClone);
+        }
+        player.getSeenCharacters().add(character);
+
+        playerRepository.save(player);
+
+        return ResponseEntity.ok(UnifiedResponse.success(TakeItemsResponse.DONE));
+    }
+}

backend/src/main/java/cz/jzitnik/chronos/controllers/GameController.java

@@ -1,10 +1,16 @@
 package cz.jzitnik.chronos.controllers;
 
 import cz.jzitnik.chronos.entities.Game;
+import cz.jzitnik.chronos.payload.errors.NotFoundError;
+import cz.jzitnik.chronos.payload.responses.TestGameKeyResponse;
 import cz.jzitnik.chronos.payload.responses.UnifiedResponse;
 import cz.jzitnik.chronos.repository.GameRepository;
+import cz.jzitnik.chronos.repository.PlayerRepository;
 import cz.jzitnik.chronos.services.GameService;
+import cz.jzitnik.chronos.utils.anotations.CheckUser;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 @CrossOrigin(origins = "*", maxAge = 3600)
@@ -17,6 +23,9 @@ public class GameController {
     @Autowired
     private GameRepository gameRepository;
 
+    @Autowired
+    private PlayerRepository playerRepository;
+
     @PostMapping("/new")
     public UnifiedResponse<Game, Error> createGame() {
         var game = gameService.createGame();
@@ -24,4 +33,52 @@ public class GameController {
 
         return UnifiedResponse.success(game);
     }
+
+    @PostMapping("/start")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<Object, Error>> startGame(@RequestParam String playerKey, @RequestParam String gameKey) {
+        var gameOptional = gameRepository.findByGameKey(gameKey);
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+
+        if (gameOptional.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(
+                    UnifiedResponse.failure(new NotFoundError("Game with key " + gameKey + " was not found!"))
+            );
+        }
+
+        var game = gameOptional.get();
+
+        if (!game.getAdminPlayer().equals(player)) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(
+                    UnifiedResponse.failure(new Error("Not authorized!"))
+            );
+        }
+
+        game.setStarted(true);
+
+        gameRepository.save(game);
+
+        return ResponseEntity.ok(UnifiedResponse.success(null));
+    }
+
+    @GetMapping("/test")
+    public ResponseEntity<UnifiedResponse<TestGameKeyResponse, Error>> testGameKey(@RequestParam String gameKey) {
+        var gameOptional = gameRepository.findByGameKey(gameKey);
+
+        if (gameOptional.isEmpty()) {
+            return ResponseEntity.ok(UnifiedResponse.success(TestGameKeyResponse.INVALID_KEY));
+        }
+
+        var game = gameOptional.get();
+
+        if (game.isStarted()) {
+            return ResponseEntity.ok(UnifiedResponse.success(TestGameKeyResponse.GAME_STARTED));
+        }
+
+        if (game.getPlayers().size() >= 3) {
+            return ResponseEntity.ok(UnifiedResponse.success(TestGameKeyResponse.MAXIUM_PLAYERS));
+        }
+
+        return ResponseEntity.ok(UnifiedResponse.success(TestGameKeyResponse.WORKING));
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/controllers/PlayerController.java

@@ -38,8 +38,6 @@ public class PlayerController {
 
         var player = gameService.addPlayer(game, playerNameRequest.getName());
 
-        gameRepository.save(game);
-
         return ResponseEntity.ok(
                 UnifiedResponse.success(player.getPlayerKey())
         );

backend/src/main/java/cz/jzitnik/chronos/controllers/RoomController.java

@@ -0,0 +1,60 @@
+package cz.jzitnik.chronos.controllers;
+
+import cz.jzitnik.chronos.entities.Room;
+import cz.jzitnik.chronos.payload.responses.UnifiedResponse;
+import cz.jzitnik.chronos.repository.PlayerRepository;
+import cz.jzitnik.chronos.repository.RoomRepository;
+import cz.jzitnik.chronos.services.GameService;
+import cz.jzitnik.chronos.utils.anotations.CheckUser;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@CrossOrigin(origins = "*", maxAge = 3600)
+@RestController
+@RequestMapping("/game/rooms")
+public class RoomController {
+    @Autowired
+    private PlayerRepository playerRepository;
+
+    @Autowired
+    private RoomRepository roomRepository;
+
+    @Autowired
+    private GameService gameService;
+
+    @GetMapping("/current_room")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<Room, Error>> getCurrentRoom(@RequestParam("playerKey") String playerKey) {
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+
+        return ResponseEntity.ok(
+                UnifiedResponse.success(player.getCurrentRoom())
+        );
+    }
+
+    @PostMapping("/move")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<Object, Error>> moveToRoom(@RequestParam("playerKey") String playerKey, @RequestParam("roomId") Long roomId) {
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+
+        var roomOptional = roomRepository.findById(roomId);
+
+        if (roomOptional.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(UnifiedResponse.failure(null));
+        }
+
+        var fromThisGame = gameService.isFromThisGame(player.getGame(), roomOptional.get());
+
+        if (!fromThisGame) {
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(UnifiedResponse.failure(new Error("Invalid roomId")));
+        }
+
+        player.setCurrentRoom(roomOptional.get());
+
+        playerRepository.save(player);
+
+        return ResponseEntity.ok(UnifiedResponse.success(null));
+    }
+}

backend/src/main/java/cz/jzitnik/chronos/controllers/StatusController.java

@@ -0,0 +1,19 @@
+package cz.jzitnik.chronos.controllers;
+
+import cz.jzitnik.chronos.payload.responses.UnifiedResponse;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@CrossOrigin(origins = "*", maxAge = 3600)
+@RestController
+@RequestMapping("/status")
+public class StatusController {
+
+    // Don't decode this base64, just go to /status endpoint, you'll be surprised
+    @GetMapping
+    public UnifiedResponse<String, Error> getStatus() {
+        return UnifiedResponse.success("working");
+    }
+}

backend/src/main/java/cz/jzitnik/chronos/entities/Character.java

@@ -2,7 +2,9 @@ package cz.jzitnik.chronos.entities;
 
 
 import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
+import cz.jzitnik.chronos.interactions.Interaction;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -15,6 +17,7 @@ import java.util.List;
 @Setter
 @Entity
 @NoArgsConstructor
+@Table(name = "characters")
 public class Character {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
@@ -29,10 +32,16 @@ public class Character {
     @Enumerated(EnumType.STRING)
     private Interaction interaction;
 
+    private boolean interactedWith;
+
     @ManyToOne
     @JsonBackReference(value = "room-characters")
     private Room room;
 
+    @ManyToMany(mappedBy = "seenCharacters", cascade = CascadeType.ALL)
+    @JsonIgnore
+    private List<Player> playersWhoSaw = new ArrayList<>();
+
     private String dialog;
 
     public Character(String name, Room room, String dialog) {

backend/src/main/java/cz/jzitnik/chronos/entities/Game.java

@@ -1,5 +1,6 @@
 package cz.jzitnik.chronos.entities;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.persistence.*;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 import lombok.Getter;
@@ -26,9 +27,20 @@ public class Game {
     private List<Player> players = new ArrayList<>();
 
     @OneToMany(mappedBy = "game", cascade = CascadeType.ALL)
-    @JsonManagedReference(value = "game-rooms")
+    @JsonIgnore
     private List<Room> rooms = new ArrayList<>();
 
+    @OneToOne(cascade = CascadeType.ALL)
+    @JoinColumn(name = "default_room_id", referencedColumnName = "id")
+    private Room defaultRoom;
+
+    @OneToOne(cascade = CascadeType.ALL)
+    @JoinColumn(name = "admin_player_id", referencedColumnName = "id")
+    @JsonIgnore
+    private Player adminPlayer;
+
+    private boolean started = false;
+
     public void addPlayer(Player player) {
         this.players.add(player);
     }

backend/src/main/java/cz/jzitnik/chronos/entities/Item.java

@@ -34,4 +34,9 @@ public class Item {
         this.itemType = itemType;
         this.charowner = charowner;
     }
+
+    public Item(ItemType itemType, Player owner) {
+        this.itemType = itemType;
+        this.owner = owner;
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/entities/Player.java

@@ -33,14 +33,29 @@ public class Player {
     private Game game;
 
     @ManyToOne
-    @Column(name = "current_room")
+    @JoinColumn(name = "current_room")
     private Room currentRoom;
 
     @Column(unique = true, nullable = false)
     @JsonIgnore
     private String playerKey;
 
+    private boolean luck = false;
+
+    @ManyToMany
+    @JoinTable(
+            name = "character_player",
+            joinColumns = @JoinColumn(name = "player_id"),
+            inverseJoinColumns = @JoinColumn(name = "character_id")
+    )
+    @JsonIgnore
+    private List<Character> seenCharacters = new ArrayList<>();
+
     public Player(String name) {
         this.name = name;
     }
+
+    public void addItem(Item item) {
+        inventory.add(item);
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/entities/Room.java

@@ -1,6 +1,5 @@
 package cz.jzitnik.chronos.entities;
 
-import com.fasterxml.jackson.annotation.JsonBackReference;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 import jakarta.persistence.*;
@@ -31,13 +30,17 @@ public class Room {
     private List<Character> characters = new ArrayList<>();
 
     @ManyToOne
-    @JsonBackReference(value = "game-rooms")
+    @JsonIgnore
     private Game game;
 
-    @OneToMany(mappedBy = "current_room", cascade = CascadeType.ALL)
+    @OneToMany(mappedBy = "currentRoom", cascade = CascadeType.ALL)
     @JsonIgnore
     private List<Player> players = new ArrayList<>();
 
+    @OneToOne(mappedBy = "defaultRoom")
+    @JsonIgnore
+    private Game gameDefault;
+
     public Room(String name, Game game) {
         this.name = name;
         this.game = game;

backend/src/main/java/cz/jzitnik/chronos/interactions/Interaction.java

@@ -0,0 +1,5 @@
+package cz.jzitnik.chronos.interactions;
+
+public enum Interaction {
+    Farmer
+}

backend/src/main/java/cz/jzitnik/chronos/interactions/InteractionService.java

@@ -0,0 +1,80 @@
+package cz.jzitnik.chronos.interactions;
+
+import cz.jzitnik.chronos.entities.Item;
+import cz.jzitnik.chronos.entities.ItemType;
+import cz.jzitnik.chronos.entities.Player;
+import cz.jzitnik.chronos.entities.Character;
+import cz.jzitnik.chronos.payload.responses.InteractionResponse;
+import cz.jzitnik.chronos.repository.CharacterRepository;
+import cz.jzitnik.chronos.repository.PlayerRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.Random;
+
+@Service
+public class InteractionService {
+    @Autowired
+    private PlayerRepository playerRepository;
+
+    @Autowired
+    private CharacterRepository characterRepository;
+
+    @FunctionalInterface
+    public interface Function3<T, U, V, W> {
+        W apply(T t, U u, V v);
+    }
+
+    public Function3<Player, Character, String, InteractionResponse> mapInteraction(Interaction interaction) {
+        return switch (interaction) {
+            case Farmer -> ((player, character, data) -> {
+                Random random = new Random();
+                boolean isLucky = player.isLuck();
+
+                int characterChoice = random.nextInt(3);
+
+                int userChoice = switch (data) {
+                    case "0" -> 0; // Rock
+                    case "1" -> 1; // Paper
+                    case "2" -> 2; // Scissors
+                    default -> throw new IllegalArgumentException("Invalid choice");
+                };
+
+                if (isLucky) {
+                    // 50/50 chance
+                    boolean playerWins = random.nextBoolean();
+
+                    // Reset the luck potion after use
+                    player.setLuck(false);
+
+                    if (playerWins) {
+                        player.addItem(new Item(ItemType.KEY_FRAGMENT, player));
+                        playerRepository.save(player);
+
+                        character.setInteractedWith(true);
+                        characterRepository.save(character);
+
+                        return new InteractionResponse(true, "Vyhrál jsi, dostáváš jeden fragment klíče.");
+                    } else {
+                        return new InteractionResponse(false, "Prohrál jsi");
+                    }
+                } else {
+                    // Standard rock-paper-scissors game logic
+                    if (userChoice == characterChoice) {
+                        return new InteractionResponse(false, "Remíza, oběma hráčům se podařilo uhádnout.");
+                    } else if ((userChoice == 0 && characterChoice == 2) || (userChoice == 1 && characterChoice == 0) || (userChoice == 2 && characterChoice == 1)) {
+                        player.addItem(new Item(ItemType.KEY_FRAGMENT, player));
+                        playerRepository.save(player);
+
+                        character.setInteractedWith(true);
+                        characterRepository.save(character);
+
+                        return new InteractionResponse(true, "Vyhrál jsi, dostáváš jeden fragment klíče.");
+                    } else {
+                        return new InteractionResponse(false, "Prohrál jsi");
+                    }
+                }
+            });
+        };
+    }
+}

backend/src/main/java/cz/jzitnik/chronos/payload/errors/NotFoundError.java

@@ -1,12 +1,7 @@
 package cz.jzitnik.chronos.payload.errors;
 
 public class NotFoundError extends Error {
-    public NotFoundError() {
-        super("Not Found Error");
-    }
-
     public NotFoundError(String message) {
         super(message);
     }
-
 }

backend/src/main/java/cz/jzitnik/chronos/payload/errors/PlayerNotFoundError.java

@@ -0,0 +1,7 @@
+package cz.jzitnik.chronos.payload.errors;
+
+public class PlayerNotFoundError extends Error {
+    public PlayerNotFoundError(String message) {
+        super(message);
+    }
+}

backend/src/main/java/cz/jzitnik/chronos/payload/requests/InteractionRequest.java

@@ -0,0 +1,13 @@
+package cz.jzitnik.chronos.payload.requests;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@AllArgsConstructor
+@NoArgsConstructor
+public class InteractionRequest {
+    private String data;
+    private Long characterId;
+}

backend/src/main/java/cz/jzitnik/chronos/payload/responses/InteractionResponse.java

@@ -0,0 +1,13 @@
+package cz.jzitnik.chronos.payload.responses;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class InteractionResponse {
+    private boolean success;
+    private String responseText;
+}

backend/src/main/java/cz/jzitnik/chronos/payload/responses/TakeItemsResponse.java

@@ -0,0 +1,6 @@
+package cz.jzitnik.chronos.payload.responses;
+
+public enum TakeItemsResponse {
+    DONE,
+    ALREADY_TAKEN
+}

backend/src/main/java/cz/jzitnik/chronos/payload/responses/TestGameKeyResponse.java

@@ -0,0 +1,8 @@
+package cz.jzitnik.chronos.payload.responses;
+
+public enum TestGameKeyResponse {
+    WORKING,
+    GAME_STARTED,
+    INVALID_KEY,
+    MAXIUM_PLAYERS
+}

backend/src/main/java/cz/jzitnik/chronos/payload/responses/UnifiedResponse.java

@@ -5,14 +5,12 @@ import lombok.Setter;
 
 import java.util.Optional;
 
-public class UnifiedResponse<T, U> {
 @Getter
+public class UnifiedResponse<T, U> {
     private final Optional<T> data;
 
-    @Getter
     private final Optional<U> error;
 
-    @Getter
     private final Boolean success;
 
     private UnifiedResponse(Optional<T> data, Optional<U> error, Boolean success) {

backend/src/main/java/cz/jzitnik/chronos/repository/CharacterRepository.java

@@ -0,0 +1,11 @@
+package cz.jzitnik.chronos.repository;
+
+import cz.jzitnik.chronos.entities.Character;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+
+@Repository
+public interface CharacterRepository extends JpaRepository<Character, Long> {
+
+}

backend/src/main/java/cz/jzitnik/chronos/repository/PlayerRepository.java

@@ -4,7 +4,10 @@ import cz.jzitnik.chronos.entities.Player;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.Optional;
+
 @Repository
 public interface PlayerRepository extends JpaRepository<Player, Long> {
     boolean existsByPlayerKey(String playerKey);
+    Optional<Player> findByPlayerKey(String playerKey);
 }

backend/src/main/java/cz/jzitnik/chronos/repository/RoomRepository.java

@@ -0,0 +1,11 @@
+package cz.jzitnik.chronos.repository;
+
+import cz.jzitnik.chronos.entities.Room;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+
+@Repository
+public interface RoomRepository extends JpaRepository<Room, Long> {
+
+}

backend/src/main/java/cz/jzitnik/chronos/services/GameService.java

@@ -2,6 +2,7 @@ package cz.jzitnik.chronos.services;
 
 import cz.jzitnik.chronos.entities.Game;
 import cz.jzitnik.chronos.entities.Player;
+import cz.jzitnik.chronos.entities.Room;
 import cz.jzitnik.chronos.repository.GameRepository;
 import cz.jzitnik.chronos.repository.PlayerRepository;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -59,7 +60,9 @@ public class GameService {
         Game newGame = new Game();
         newGame.setGameKey(generateUniqueGameKey());
 
-        initGameService.initGame(newGame);
+        var defaultRoom = initGameService.initGame(newGame);
+
+        newGame.setDefaultRoom(defaultRoom);
 
         return gameRepository.save(newGame);
     }
@@ -68,9 +71,21 @@ public class GameService {
         var player = new Player(playerName);
         player.setPlayerKey(generateUniquePlayerKey());
         player.setGame(game);
+        player.setCurrentRoom(game.getDefaultRoom());
+
+        if (game.getPlayers().isEmpty()) {
+            game.setAdminPlayer(player);
+        }
 
         game.addPlayer(player);
 
+        gameRepository.save(game);
+
         return player;
     }
+
+
+    public boolean isFromThisGame(Game game, Room room) {
+        return game.getRooms().stream().anyMatch(rm -> rm.equals(room));
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/services/InitGameService.java

@@ -2,16 +2,16 @@ package cz.jzitnik.chronos.services;
 
 import cz.jzitnik.chronos.entities.*;
 import cz.jzitnik.chronos.entities.Character;
+import cz.jzitnik.chronos.interactions.Interaction;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
 
 @Service
 public class InitGameService {
-    public void initGame(Game game) {
+    public Room initGame(Game game) {
         var rooms = new ArrayList<Room>();
 
-
         // Outside
         var outside = new Room(
                 "Outside", // Name
@@ -48,5 +48,8 @@ public class InitGameService {
         rooms.add(stodola);
 
         game.setRooms(rooms);
+
+        // Return a room that all players will spawn in
+        return outside;
     }
 }

backend/src/main/java/cz/jzitnik/chronos/utils/anotations/CheckUser.java

@@ -0,0 +1,11 @@
+package cz.jzitnik.chronos.utils.anotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface CheckUser {
+}

backend/src/main/java/cz/jzitnik/chronos/utils/anotations/UserCheckAspect.java

@@ -0,0 +1,35 @@
+package cz.jzitnik.chronos.utils.anotations;
+
+import cz.jzitnik.chronos.payload.errors.PlayerNotFoundError;
+import cz.jzitnik.chronos.payload.responses.UnifiedResponse;
+import cz.jzitnik.chronos.repository.PlayerRepository;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+
+@Aspect
+@Component
+public class UserCheckAspect {
+
+    @Autowired
+    private PlayerRepository playerRepository;
+
+    @Around("@annotation(CheckUser)")
+    public Object checkUser(ProceedingJoinPoint joinPoint) throws Throwable {
+        String playerKey = (String) joinPoint.getArgs()[0]; // Assuming playerKey is the first argument
+        var playerOptional = playerRepository.findByPlayerKey(playerKey);
+
+        if (playerOptional.isEmpty()) {
+            return ResponseEntity
+                    .status(HttpStatus.NOT_FOUND)
+                    .body(UnifiedResponse.failure(new PlayerNotFoundError("Player was not found!")));
+        }
+
+        // Proceed with the original method if the player exists
+        return joinPoint.proceed();
+    }
+}

chronos/pom.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-
-    <groupId>cz.jzitnik</groupId>
-    <artifactId>chronos</artifactId>
-    <version>1.0-SNAPSHOT</version>
-
-    <properties>
-        <maven.compiler.source>23</maven.compiler.source>
-        <maven.compiler.target>23</maven.compiler.target>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
-
-</project>

chronos/src/main/java/cz/jzitnik/Main.java

@@ -1,7 +0,0 @@
-package cz.jzitnik;
-
-public class Main {
-    public static void main(String[] args) {
-        System.out.println("Hello, World!");
-    }
-}

frontend/.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="20" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="openjdk-23" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

frontend/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

frontend/pom.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>cz.jzitnik</groupId>
+    <artifactId>chronos</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>23</maven.compiler.source>
+        <maven.compiler.target>23</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>23</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.squareup.retrofit2</groupId>
+            <artifactId>retrofit</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.squareup.retrofit2</groupId>
+            <artifactId>converter-jackson</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.httpcomponents.client5</groupId>
+            <artifactId>httpclient5</artifactId>
+            <version>5.2</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+            <version>1.18.36</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.15.2</version> <!-- Use the latest version -->
+        </dependency>
+    </dependencies>
+
+</project>

frontend/src/main/java/cz/jzitnik/Main.java

@@ -0,0 +1,56 @@
+package cz.jzitnik;
+
+import cz.jzitnik.game.Chronos;
+import cz.jzitnik.utils.Cli;
+
+import java.io.IOException;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        Chronos chronos = new Chronos();
+
+        Cli.printHeader("Načítání hry Chronos");
+        Cli.info("Načítání konfigurace...");
+
+        if (chronos.hasConfig()) {
+            chronos.loadData();
+            Cli.success("Konfigurace byla úspěšně nalezena a načtena!");
+        } else {
+            // Setup a server
+            Cli.info("Konfigurace nebyla nalezena! Vytvářím novou.");
+            chronos.setup();
+        }
+
+        if (!chronos.hasUser()) {
+            System.out.println();
+            Cli.type("Nyní si buď vytvoříte vlastní hru a nebo se připojíte do již existující hry");
+            System.out.println();
+
+            String[] options = {"Vytvořit novou hru", "Připojit se do již existující hry"};
+            var option = Cli.selectOption(options);
+
+            switch (option) {
+                case "Vytvořit novou hru":
+                    chronos.createNewGame();
+                    chronos.addUser();
+                    Cli.success("Byl jste úspěšně zaregistrován jako první hráč!");
+                    chronos.adminPanel();
+                    break;
+                case "Připojit se do hry":
+                    chronos.connectToExisting();
+                    chronos.addUser();
+                    Cli.success("Byl jste úspěšně zaregistrován jako hráč!");
+                    break;
+                default:
+                    System.out.println("Error"); // This will never happen
+            }
+        }
+
+
+        chronos.waitForStart();
+        Cli.info("Hra začala!");
+        System.out.println("\n\n");
+        Cli.printHeader("Chronos");
+        chronos.visit();
+    }
+}

frontend/src/main/java/cz/jzitnik/api/ApiService.java

@@ -0,0 +1,55 @@
+package cz.jzitnik.api;
+
+import cz.jzitnik.api.requests.PlayerNameRequest;
+import cz.jzitnik.api.responses.UnifiedResponse;
+import cz.jzitnik.api.types.Game;
+import cz.jzitnik.api.types.Room;
+import cz.jzitnik.api.types.TakeItemsResponse;
+import cz.jzitnik.api.types.TestGameKeyResponse;
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+import retrofit2.http.Query;
+
+public interface ApiService {
+    @GET("status")
+    Call<UnifiedResponse<String, Error>> status();
+
+    @POST("game/new")
+    Call<UnifiedResponse<Game, Error>> newGame();
+
+    @POST("game/players/new")
+    Call<UnifiedResponse<String, Error>> newPlayer(
+            @Query("gameKey") String gameKey,
+            @Body PlayerNameRequest requestBody
+    );
+
+    @POST("game/start")
+    Call<UnifiedResponse<Object, Error>> startGame(
+            @Query("playerKey") String playerKey,
+            @Query("gameKey") String gameKey
+    );
+
+    @GET("game/test")
+    Call<UnifiedResponse<TestGameKeyResponse, Error>> testGameKey(
+            @Query("gameKey") String gameKey
+    );
+
+    @GET("game/rooms/current_room")
+    Call<UnifiedResponse<Room, Error>> getCurrentRoom(
+            @Query("playerKey") String playerKey
+    );
+
+    @POST("game/rooms/move")
+    Call<UnifiedResponse<Object, Error>> moveToRoom(
+            @Query("playerKey") String playerKey,
+            @Query("roomId") Long roomId
+    );
+
+    @POST("game/characters/take_items")
+    Call<UnifiedResponse<TakeItemsResponse, Error>> takeItems(
+            @Query("playerKey") String playerKey,
+            @Query("characterId") Long characterId
+    );
+}

frontend/src/main/java/cz/jzitnik/api/requests/PlayerNameRequest.java

@@ -0,0 +1,12 @@
+package cz.jzitnik.api.requests;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class PlayerNameRequest {
+    private String name;
+}

frontend/src/main/java/cz/jzitnik/api/responses/UnifiedResponse.java

@@ -0,0 +1,20 @@
+package cz.jzitnik.api.responses;
+
+import lombok.Getter;
+
+import java.util.Optional;
+
+@Getter
+public class UnifiedResponse<T, U> {
+    private Optional<T> data;
+    private Optional<U> error;
+    private Boolean success;
+
+    public void setData(T data) {
+        this.data = Optional.ofNullable(data);
+    }
+
+    public void setError(U error) {
+        this.error = Optional.ofNullable(error);
+    }
+}

frontend/src/main/java/cz/jzitnik/api/types/Character.java

@@ -0,0 +1,24 @@
+package cz.jzitnik.api.types;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.util.List;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class Character {
+    private Long id;
+
+    private String name;
+
+    private List<Item> inventory;
+
+    private Interaction interaction;
+
+    private boolean interactedWith;
+
+    private String dialog;
+}

frontend/src/main/java/cz/jzitnik/api/types/Game.java

@@ -0,0 +1,24 @@
+package cz.jzitnik.api.types;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.util.List;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Game {
+    private Long id;
+
+    private String gameKey;
+
+    private List<Player> players;
+
+    private Room defaultRoom;
+
+    private boolean started;
+}

frontend/src/main/java/cz/jzitnik/api/types/Interaction.java

@@ -1,4 +1,4 @@
-package cz.jzitnik.chronos.entities;
+package cz.jzitnik.api.types;
 
 public enum Interaction {
     Farmer

frontend/src/main/java/cz/jzitnik/api/types/Item.java

@@ -0,0 +1,12 @@
+package cz.jzitnik.api.types;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class Item {
+    private Long id;
+
+    private ItemType itemType;
+}

frontend/src/main/java/cz/jzitnik/api/types/ItemType.java

@@ -0,0 +1,6 @@
+package cz.jzitnik.api.types;
+
+public enum ItemType {
+    KEY_FRAGMENT,
+    LUCK_POTION
+}

frontend/src/main/java/cz/jzitnik/api/types/Player.java

@@ -0,0 +1,18 @@
+package cz.jzitnik.api.types;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.List;
+
+@Getter
+@Setter
+public class Player {
+    private Long id;
+
+    private String name;
+
+    private List<Item> inventory;
+
+    private Room currentRoom;
+}

frontend/src/main/java/cz/jzitnik/api/types/Room.java

@@ -0,0 +1,18 @@
+package cz.jzitnik.api.types;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.List;
+
+@Getter
+@Setter
+public class Room {
+    private Long id;
+
+    private String name;
+
+    private List<Item> items;
+
+    private List<Character> characters;
+}

frontend/src/main/java/cz/jzitnik/api/types/TakeItemsResponse.java

@@ -0,0 +1,6 @@
+package cz.jzitnik.api.types;
+
+public enum TakeItemsResponse {
+    DONE,
+    ALREADY_TAKEN
+}

frontend/src/main/java/cz/jzitnik/api/types/TestGameKeyResponse.java

@@ -0,0 +1,8 @@
+package cz.jzitnik.api.types;
+
+public enum TestGameKeyResponse {
+    WORKING,
+    GAME_STARTED,
+    INVALID_KEY,
+    MAXIUM_PLAYERS
+}

frontend/src/main/java/cz/jzitnik/game/Chronos.java

@@ -0,0 +1,243 @@
+package cz.jzitnik.game;
+
+import cz.jzitnik.api.ApiService;
+import cz.jzitnik.api.requests.PlayerNameRequest;
+import cz.jzitnik.api.types.Character;
+import cz.jzitnik.api.types.Room;
+import cz.jzitnik.api.types.TakeItemsResponse;
+import cz.jzitnik.api.types.TestGameKeyResponse;
+import cz.jzitnik.utils.Cli;
+import cz.jzitnik.utils.ConfigPathProvider;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.io.Console;
+import java.io.File;
+import java.io.IOException;
+import java.net.ConnectException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.Objects;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+import retrofit2.http.GET;
+
+@NoArgsConstructor
+@Getter
+public class Chronos {
+    private static final String IPV4_PATTERN =
+           "^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
+
+    private static boolean isValidIPv4(String ip) {
+        return ip.matches(IPV4_PATTERN);
+    }
+
+    private LocalData localData = new LocalData();
+    private ApiService apiService;
+
+    public boolean hasConfig() {
+        var config_path = ConfigPathProvider.getPath();
+        File file = new File(Path.of(config_path, "config.json").toString());
+
+        return file.exists();
+    }
+
+    public boolean hasUser() {
+        return localData.getUserSecret() != null;
+    }
+
+    public void loadData() throws IOException {
+        var config_path = ConfigPathProvider.getPath();
+        File file = new File(Path.of(config_path, "config.json").toString());
+        String content = Files.readString(file.toPath());
+
+        ObjectMapper objectMapper = new ObjectMapper();
+
+        try {
+            this.localData = objectMapper.readValue(content, LocalData.class);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        setupApi(localData.getServer());
+    }
+
+    private void setupApi(String baseUrl) {
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl(baseUrl)
+                .addConverterFactory(JacksonConverterFactory.create(new ObjectMapper()))
+                .build();
+
+        this.apiService = retrofit.create(ApiService.class);
+    }
+
+    public void setup() throws IOException {
+        System.out.println("\n");
+        Cli.type("Nyní se budeme muset připojit na Chronos server. Zadejte prosím IP adresu serveru na kterém běží chronos server.\nNapř: 127.0.0.1");
+        Console console = System.console();
+
+        String ipaddr = null;
+        do {
+            ipaddr = console.readLine(ipaddr == null ? "Zadejte ip adresu serveru: " : "Zadejte platnou ip adresu serveru: ");
+        } while (!isValidIPv4(ipaddr));
+
+        Cli.info("Pokouším se připojit k serveru");
+
+        String baseUrl = "http://" + ipaddr + ":8080/";
+        setupApi(baseUrl);
+
+        try {
+            var response = apiService.status().execute().body();
+
+            if (response.getData().isEmpty() || !response.getData().get().equals("working")) {
+                Cli.error("Tento server pravděpodobně není Chronos server.");
+                setup();
+                return;
+            }
+        } catch (ConnectException e) {
+            Cli.error("Nastala chyba při připojování k serveru, zkuste to znovu");
+            setup();
+            return;
+        }
+
+        Cli.success("Server byl úspěšně nastaven");
+
+        this.localData.setServer(baseUrl);
+        this.localData.saveData();
+    }
+
+    public void createNewGame() throws IOException {
+        Cli.printHeader("Vytvoření hry");
+        Cli.info("Vytvářím novou hru");
+        var body = apiService.newGame().execute().body();
+
+        if (!Objects.requireNonNull(body).getSuccess()) {
+            System.err.println("Nastala chyba při vytváření hry!");
+            System.exit(1);
+        }
+
+        var data = body.getData().get();
+        localData.setGameKey(data.getGameKey());
+
+        Cli.success("Byla úspěšně vytvořena hra");
+    }
+
+    public void addUser() throws IOException {
+        Cli.printHeader("Vytvoření hráče");
+        Console console = System.console();
+
+        var name = console.readLine("Zadejte vaše jméno: ");
+        var newPlayerBody = apiService.newPlayer(localData.getGameKey(), new PlayerNameRequest(name)).execute().body();
+
+        if (!Objects.requireNonNull(newPlayerBody).getSuccess()) {
+            System.err.println("Nastala chyba při vytváření hráče!");
+            System.exit(1);
+        }
+
+        localData.setUserSecret(newPlayerBody.getData().get());
+    }
+
+    public void adminPanel() throws IOException {
+        Cli.printHeader("Čekání na připojení hráčů");
+        System.out.println();
+        Cli.center("Kód pro připojení:");
+        System.out.print(Cli.Colors.GREEN);
+        Cli.center(localData.getGameKey());
+        System.out.print(Cli.Colors.RESET);
+        Cli.center("(pomocí tohoto kódu se hráči můžou napojit)");
+        System.out.println("\nPo startu hry už se nemůžou napojit noví hráči!");
+        System.out.println("Stiskněte " + Cli.Colors.CYAN + "Enter" + Cli.Colors.RESET + " pro start hry...");
+        System.console().readLine();
+
+        localData.saveData();
+        apiService.startGame(localData.getUserSecret(), localData.getGameKey()).execute();
+    }
+
+    public void connectToExisting() throws IOException {
+        Console console = System.console();
+        Cli.printHeader("Připojení do hry");
+        System.out.println();
+        String code = console.readLine("Zadejte kod pro připojení: ");
+
+        var testGameKeyResponse = apiService.testGameKey(code).execute().body().getData().get();
+
+        if (testGameKeyResponse == TestGameKeyResponse.INVALID_KEY) {
+            Cli.error("Nebyla nalezena hra s tímto kódem!");
+            connectToExisting();
+            return;
+        }
+
+        if (testGameKeyResponse == TestGameKeyResponse.GAME_STARTED) {
+            Cli.error("Tato hra již začala!");
+            connectToExisting();
+            return;
+        }
+
+        if (testGameKeyResponse == TestGameKeyResponse.MAXIUM_PLAYERS) {
+            Cli.error("V této hře je již maximální počet hráčů!");
+            connectToExisting();
+            return;
+        }
+
+        localData.setGameKey(code);
+    }
+
+    public void waitForStart() throws IOException {
+        boolean started = false;
+        while (!started) {
+            var res = apiService.testGameKey(localData.getGameKey()).execute();
+            var data = res.body().getData().get();
+
+            started = data == TestGameKeyResponse.GAME_STARTED;
+            try {
+                Thread.sleep(2000);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    public void visit() throws IOException {
+        var res = apiService.getCurrentRoom(localData.getUserSecret()).execute();
+        var room = res.body().getData().get();
+        visit(room, false);
+    }
+    public void visit(Room room) throws IOException {
+        visit(room, true);
+    }
+    public void visit(Room room, boolean changeRoom) throws IOException {
+        if (changeRoom) {
+            apiService.moveToRoom(localData.getUserSecret(), room.getId());
+        }
+
+        Cli.info("Nyní se nacházíte v místnosti " + room.getName());
+
+        if (room.getCharacters().isEmpty()) {
+            Cli.type("V místnosti  je prázno... Ani jedna duše.");
+        }
+        for (Character character : room.getCharacters()) {
+            talkWith(character);
+        }
+    }
+
+
+    public void talkWith(Character character) throws IOException {
+        Cli.type("V místnosti je " + character.getName());
+        System.out.println();
+        Cli.type(Cli.Colors.YELLOW + character.getName() + ": " + Cli.Colors.RESET + character.getDialog());
+
+        if (!character.getInventory().isEmpty()) {
+            var res = apiService.takeItems(getLocalData().getUserSecret(), character.getId()).execute();
+            var body = res.body().getData().get();
+
+            if (body == TakeItemsResponse.ALREADY_TAKEN) {
+                Cli.type(Cli.Colors.YELLOW + character.getName() + ": " + Cli.Colors.RESET + "Už jsem ti mé itemy dal. Už pro tebe nic nemám.");
+            } else {
+                var characters = character.getInventory().stream().map(item -> item.getItemType().toString()).toList();
+                Cli.info("Dostal jste: " + String.join(", ", characters));
+            }
+        }
+    }
+}

frontend/src/main/java/cz/jzitnik/game/LocalData.java

@@ -0,0 +1,41 @@
+package cz.jzitnik.game;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import cz.jzitnik.utils.ConfigPathProvider;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class LocalData {
+    private String server;
+    private String userSecret;
+    private String gameKey;
+
+    public void saveData() {
+        ObjectMapper objectMapper = new ObjectMapper();
+        try {
+            String configPath = ConfigPathProvider.getPath();
+            File file = new File(Path.of(configPath, "config.json").toString());
+
+            File parentDir = file.getParentFile();
+            if (!parentDir.exists()) {
+                parentDir.mkdirs();
+            }
+
+            objectMapper.writeValue(file, this);
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

frontend/src/main/java/cz/jzitnik/utils/Cli.java

@@ -0,0 +1,172 @@
+package cz.jzitnik.utils;
+
+import java.util.Scanner;
+
+public class Cli {
+    public static class Colors {
+        public static final String RESET = "\033[0m";  // ANSI escape code to reset the terminal
+
+        // Text colors
+        public static final String BLACK = "\033[0;30m";
+        public static final String RED = "\033[0;31m";
+        public static final String GREEN = "\033[0;32m";
+        public static final String YELLOW = "\033[0;33m";
+        public static final String BLUE = "\033[0;34m";
+        public static final String PURPLE = "\033[0;35m";
+        public static final String CYAN = "\033[0;36m";
+        public static final String WHITE = "\033[0;37m";
+
+        // Bold text colors (in bold)
+        public static final String BOLD_BLACK = "\033[1;30m";
+        public static final String BOLD_RED = "\033[1;31m";
+        public static final String BOLD_GREEN = "\033[1;32m";
+        public static final String BOLD_YELLOW = "\033[1;33m";
+        public static final String BOLD_BLUE = "\033[1;34m";
+        public static final String BOLD_PURPLE = "\033[1;35m";
+        public static final String BOLD_CYAN = "\033[1;36m";
+        public static final String BOLD_WHITE = "\033[1;37m";
+
+        // Background colors
+        public static final String BLACK_BACKGROUND = "\033[40m";
+        public static final String RED_BACKGROUND = "\033[41m";
+        public static final String GREEN_BACKGROUND = "\033[42m";
+        public static final String YELLOW_BACKGROUND = "\033[43m";
+        public static final String BLUE_BACKGROUND = "\033[44m";
+        public static final String PURPLE_BACKGROUND = "\033[45m";
+        public static final String CYAN_BACKGROUND = "\033[46m";
+        public static final String WHITE_BACKGROUND = "\033[47m";
+
+        // Bold background colors
+        public static final String BOLD_BLACK_BACKGROUND = "\033[1;40m";
+        public static final String BOLD_RED_BACKGROUND = "\033[1;41m";
+        public static final String BOLD_GREEN_BACKGROUND = "\033[1;42m";
+        public static final String BOLD_YELLOW_BACKGROUND = "\033[1;43m";
+        public static final String BOLD_BLUE_BACKGROUND = "\033[1;44m";
+        public static final String BOLD_PURPLE_BACKGROUND = "\033[1;45m";
+        public static final String BOLD_CYAN_BACKGROUND = "\033[1;46m";
+        public static final String BOLD_WHITE_BACKGROUND = "\033[1;47m";
+    }
+
+    public static void printHeader(String text) {
+        int totalWidth = 100;
+        int padding = (totalWidth - text.length()) / 2;
+
+        StringBuilder sb = new StringBuilder(totalWidth);
+        for (int i = 0; i < padding; i++) {
+            sb.append("=");
+        }
+        sb.append(" ");
+        sb.append(text);
+        sb.append(" ");
+        for (int i = 0; i < padding; i++) {
+            sb.append("=");
+        }
+
+        while (sb.length() < totalWidth) {
+            sb.insert(0, "=");
+        }
+
+        System.out.println();
+        System.out.println(sb);
+    }
+
+    public static void center(String text) {
+        int totalWidth = 100;
+        int padding = (totalWidth - text.length()) / 2;
+
+        StringBuilder sb = new StringBuilder(totalWidth);
+        for (int i = 0; i < padding; i++) {
+            sb.append(" ");
+        }
+        sb.append(text);
+        for (int i = 0; i < padding; i++) {
+            sb.append(" ");
+        }
+
+        while (sb.length() < totalWidth) {
+            sb.insert(0, " ");
+        }
+
+        System.out.println(sb);
+    }
+
+    public static String wrapText(String text) {
+        return wrapText(text, 0);
+    }
+
+    public static String wrapText(String text, int charsRemove) {
+        StringBuilder wrappedText = new StringBuilder();
+        int line = 0;
+
+        var words = text.split(" ");
+
+        for (var word : words) {
+            if ((line + word.length() + 1) > (100 - charsRemove)) {
+                wrappedText.append("\n");
+                line = 0;
+            }
+            line += word.length() + 1;
+            wrappedText.append(word).append(" ");
+        }
+
+        return wrappedText.toString();
+    }
+
+    public static void typeText(String text) {
+        for (int i = 0; i < text.length(); i++) {
+            System.out.print(text.charAt(i));
+            try {
+                Thread.sleep(10);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }
+        System.out.println();
+    }
+
+    public static void type(String text) {
+        Cli.typeText(Cli.wrapText(text));
+    }
+
+    public static void info(String text) {
+        System.out.println(Colors.BLUE + "Info: " + Colors.RESET + Cli.wrapText(text, 6));
+    }
+    public static void success(String text) {
+        System.out.println(Colors.GREEN + "Úspěch: " + Colors.RESET + Cli.wrapText(text, 8));
+    }
+    public static void error(String text) {
+        System.out.println(Colors.RED + "Chyba: " + Colors.RESET + Cli.wrapText(text, 7));
+    }
+
+
+    /**
+     * Displays a menu with the provided options and returns the selected option.
+     *
+     * @param options Array of options to display to the user.
+     * @return The selected option as a String.
+     */
+    public static String selectOption(String[] options) {
+        Scanner scanner = new Scanner(System.in);
+        int choice;
+
+        System.out.println("Vyberte možnost:");
+        for (int i = 0; i < options.length; i++) {
+            System.out.println((i + 1) + ". " + options[i]);
+        }
+
+        while (true) {
+            System.out.print("Vložte číslo možnosti: ");
+            if (scanner.hasNextInt()) {
+                choice = scanner.nextInt();
+                if (choice >= 1 && choice <= options.length) {
+                    return options[choice - 1];
+                } else {
+                    System.out.println("Neplatní možnost, vyberte číslo mezi 1 a " + options.length);
+                }
+            } else {
+                System.out.println("Neplatný vstup, vložte číslo.");
+                scanner.next();
+            }
+        }
+    }
+}

frontend/src/main/java/cz/jzitnik/utils/ConfigPathProvider.java

@@ -0,0 +1,19 @@
+package cz.jzitnik.utils;
+
+public class ConfigPathProvider {
+    public static String getPath() {
+        String configDir;
+        String os = System.getProperty("os.name").toLowerCase();
+        if (os.contains("win")) {
+            configDir = System.getenv("APPDATA") + "\\Chronos";
+        } else if (os.contains("nix") || os.contains("nux")) {
+            configDir = System.getProperty("user.home") + "/.config/Chronos";
+        } else if (os.contains("mac")) {
+            configDir = System.getProperty("user.home") + "/Library/Application Support/Chronos";
+        } else {
+            configDir = System.getProperty("user.home") + "/Chronos";
+        }
+
+        return configDir;
+    }
+}