src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/lobby/create_lobby/CreateLobbyHandler.java

@@ -0,0 +1,32 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.lobby.create_lobby;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.lobby.LobbyId;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.lobby.LobbyManager;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.execution.CommandHandler;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.ErrorResponse;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.dispatcher.ResponseDispatcher;
+
+public class CreateLobbyHandler extends CommandHandler<CreateLobbyRequest> {
+    private final LobbyManager lobbyManager;
+
+    public CreateLobbyHandler(ResponseDispatcher responseDispatcher, LobbyManager lobbyManager) {
+        super(responseDispatcher);
+        this.lobbyManager = lobbyManager;
+    }
+
+    @Override
+    public void execute(CreateLobbyRequest request) {
+        LobbyId id = lobbyManager.createNewLobby(null);
+
+        if (id == null) {
+            responseDispatcher.dispatch(
+                    new ErrorResponse(
+                            request.getContext(),
+                            "LOBBIES_FULL",
+                            "Maximum number of 8 lobbies reached"));
+            return;
+        }
+
+        responseDispatcher.dispatch(new CreateLobbyResponse(request.getContext(), id.value()));
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/lobby/create_lobby/CreateLobbyParser.java

@@ -0,0 +1,11 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.lobby.create_lobby;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.parsing.CommandParser;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.PrimitiveRequest;
+
+public class CreateLobbyParser implements CommandParser<CreateLobbyRequest> {
+    @Override
+    public CreateLobbyRequest parse(PrimitiveRequest primitiveRequest) {
+        return new CreateLobbyRequest(primitiveRequest.context());
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/lobby/create_lobby/CreateLobbyRequest.java

@@ -0,0 +1,10 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.lobby.create_lobby;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.Request;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+
+public class CreateLobbyRequest extends Request {
+    public CreateLobbyRequest(RequestContext context) {
+        super(context);
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/lobby/create_lobby/CreateLobbyResponse.java

@@ -0,0 +1,14 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.lobby.create_lobby;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.SuccessResponse;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.builder.ResponseBodyBuilder;
+
+/** Sends ID of newly created lobby back to client. */
+public class CreateLobbyResponse extends SuccessResponse {
+    public CreateLobbyResponse(RequestContext context, int lobbyId) {
+        super(
+                context,
+                new ResponseBodyBuilder().param("LOBBY_ID", String.valueOf(lobbyId)).build());
+    }
+}