From 7916a8279e0dcbb7d77c5dfaead75189e3849374 Mon Sep 17 00:00:00 2001 From: Kirill Popov Date: Thu, 21 Dec 2023 17:19:54 +0200 Subject: [PATCH] Add servlets and UI for a Tic-Tac-Toe game This commit introduces servlets (`InitServlet`, `LogicServlet` and `RestartServlet`) for initializing, processing the game logic and restarting a game of Tic-Tac-Toe respectively. It also implements a basic UI in `index.jsp` with an updated CSS style in `main.css`. This forms the core functionality of the Tic-Tac-Toe game. --- src/main/java/com/tictactoe/InitServlet.java | 29 ++++++ src/main/java/com/tictactoe/LogicServlet.java | 90 +++++++++++++++++++ .../java/com/tictactoe/RestartServlet.java | 16 ++++ src/main/webapp/index.jsp | 51 ++++++++++- src/main/webapp/static/main.css | 11 +++ 5 files changed, 196 insertions(+), 1 deletion(-) create mode 100644 src/main/java/com/tictactoe/InitServlet.java create mode 100644 src/main/java/com/tictactoe/LogicServlet.java create mode 100644 src/main/java/com/tictactoe/RestartServlet.java diff --git a/src/main/java/com/tictactoe/InitServlet.java b/src/main/java/com/tictactoe/InitServlet.java new file mode 100644 index 00000000..f4bf2c6a --- /dev/null +++ b/src/main/java/com/tictactoe/InitServlet.java @@ -0,0 +1,29 @@ +package com.tictactoe; + +import javax.servlet.ServletException; +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import javax.servlet.http.HttpSession; +import java.io.IOException; +import java.util.List; +import java.util.Map; + +@WebServlet(name = "InitServlet", value = "/start") +public class InitServlet extends HttpServlet { + @Override + protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { + HttpSession currentSession = req.getSession(true); + + Field field = new Field(); + Map fieldData = field.getField(); + + List data = field.getFieldData(); + + currentSession.setAttribute("field", field); + currentSession.setAttribute("data", data); + + getServletContext().getRequestDispatcher("/index.jsp").forward(req, resp); + } +} diff --git a/src/main/java/com/tictactoe/LogicServlet.java b/src/main/java/com/tictactoe/LogicServlet.java new file mode 100644 index 00000000..4b7671c0 --- /dev/null +++ b/src/main/java/com/tictactoe/LogicServlet.java @@ -0,0 +1,90 @@ +package com.tictactoe; + +import javax.servlet.RequestDispatcher; +import javax.servlet.ServletException; +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import javax.servlet.http.HttpSession; +import java.io.IOException; +import java.util.List; + +@WebServlet(name = "LogicServlet", value = "/logic") +public class LogicServlet extends HttpServlet { + @Override + protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { + HttpSession currentSession = req.getSession(); + + Field field = extractField(currentSession); + + int index = getSelectedIndex(req); + Sign currentSign = field.getField().get(index); + + if (Sign.EMPTY != currentSign) { + RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/index.jsp"); + dispatcher.forward(req, resp); + return; + } + + field.getField().put(index, Sign.CROSS); + if (checkWin(resp, currentSession, field)) { + return; + } + + int emptyFieldIndex = field.getEmptyFieldIndex(); + + if (emptyFieldIndex >= 0) { + field.getField().put(emptyFieldIndex, Sign.NOUGHT); + if (checkWin(resp, currentSession, field)) { + return; + } + } else { + currentSession.setAttribute("draw", true); + + List data = field.getFieldData(); + + currentSession.setAttribute("data", data); + + resp.sendRedirect("/index.jsp"); + return; + } + + + List data = field.getFieldData(); + + currentSession.setAttribute("data", data); + currentSession.setAttribute("field", field); + + resp.sendRedirect("/index.jsp"); + } + + private Field extractField(HttpSession currentSession) { + Object fieldAttribute = currentSession.getAttribute("field"); + if (Field.class != fieldAttribute.getClass()) { + currentSession.invalidate(); + throw new RuntimeException("Session is broken, try one more time"); + } + return (Field) fieldAttribute; + } + + private int getSelectedIndex(HttpServletRequest req) { + String click = req.getParameter("click"); + boolean isNumeric = click.chars().allMatch(Character::isDigit); + return isNumeric ? Integer.parseInt(click) : 0; + } + + private boolean checkWin(HttpServletResponse response, HttpSession currentSession, Field field) throws IOException { + Sign winner = field.checkWin(); + if (Sign.CROSS == winner || Sign.NOUGHT == winner) { + currentSession.setAttribute("winner", winner); + List data = field.getFieldData(); + + currentSession.setAttribute("data", data); + response.sendRedirect("/index.jsp"); + + return true; + } + return false; + } +} diff --git a/src/main/java/com/tictactoe/RestartServlet.java b/src/main/java/com/tictactoe/RestartServlet.java new file mode 100644 index 00000000..019c3ce8 --- /dev/null +++ b/src/main/java/com/tictactoe/RestartServlet.java @@ -0,0 +1,16 @@ +package com.tictactoe; + +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import java.io.IOException; + +@WebServlet(name = "RestartServlet", value = "/restart") +public class RestartServlet extends HttpServlet { + @Override + protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException { + req.getSession().invalidate(); + resp.sendRedirect("/start"); + } +} diff --git a/src/main/webapp/index.jsp b/src/main/webapp/index.jsp index 964cc071..b8aa485c 100644 --- a/src/main/webapp/index.jsp +++ b/src/main/webapp/index.jsp @@ -1,16 +1,65 @@ +<%@ page import="com.tictactoe.Sign" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> Tic-Tac-Toe + <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> + + +

Tic-Tac-Toe

+ + + + + + + + + + + + + + + + +
${data.get(0).getSign()}${data.get(1).getSign()}${data.get(2).getSign()}
${data.get(3).getSign()}${data.get(4).getSign()}${data.get(5).getSign()}
${data.get(6).getSign()}${data.get(7).getSign()}${data.get(8).getSign()}
+
+ + - diff --git a/src/main/webapp/static/main.css b/src/main/webapp/static/main.css index e69de29b..33049a9b 100644 --- a/src/main/webapp/static/main.css +++ b/src/main/webapp/static/main.css @@ -0,0 +1,11 @@ +td { + border: 3px solid black; + padding: 10px; + border-collapse: separate; + margin: 10px; + width: 100px; + height: 100px; + font-size: 50px; + text-align: center; + empty-cells: show; +} \ No newline at end of file