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Complete project-servlet #32

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17 changes: 11 additions & 6 deletions pom.xml
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Expand Up @@ -18,15 +18,20 @@

<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>6.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
<groupId>jakarta.servlet.jsp.jstl</groupId>
<artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jakarta.servlet.jsp.jstl</artifactId>
<version>3.0.1</version>
</dependency>
</dependencies>

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38 changes: 19 additions & 19 deletions src/main/java/com/tictactoe/Field.java
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Expand Up @@ -6,34 +6,34 @@
import java.util.stream.Collectors;

public class Field {
private final Map<Integer, Sign> field;
private final Map<Integer, Sign> innerField;

public Field() {
field = new HashMap<>();
field.put(0, Sign.EMPTY);
field.put(1, Sign.EMPTY);
field.put(2, Sign.EMPTY);
field.put(3, Sign.EMPTY);
field.put(4, Sign.EMPTY);
field.put(5, Sign.EMPTY);
field.put(6, Sign.EMPTY);
field.put(7, Sign.EMPTY);
field.put(8, Sign.EMPTY);
innerField = new HashMap<>();
innerField.put(0, Sign.EMPTY);
innerField.put(1, Sign.EMPTY);
innerField.put(2, Sign.EMPTY);
innerField.put(3, Sign.EMPTY);
innerField.put(4, Sign.EMPTY);
innerField.put(5, Sign.EMPTY);
innerField.put(6, Sign.EMPTY);
innerField.put(7, Sign.EMPTY);
innerField.put(8, Sign.EMPTY);
}

public Map<Integer, Sign> getField() {
return field;
public Map<Integer, Sign> getInnerField() {
return innerField;
}

public int getEmptyFieldIndex() {
return field.entrySet().stream()
return innerField.entrySet().stream()
.filter(e -> e.getValue() == Sign.EMPTY)
.map(Map.Entry::getKey)
.findFirst().orElse(-1);
}

public List<Sign> getFieldData() {
return field.entrySet().stream()
public List<Sign> getInnerFieldData() {
return innerField.entrySet().stream()
.sorted(Map.Entry.comparingByKey())
.map(Map.Entry::getValue)
.collect(Collectors.toList());
Expand All @@ -52,9 +52,9 @@ public Sign checkWin() {
);

for (List<Integer> winPossibility : winPossibilities) {
if (field.get(winPossibility.get(0)) == field.get(winPossibility.get(1))
&& field.get(winPossibility.get(0)) == field.get(winPossibility.get(2))) {
return field.get(winPossibility.get(0));
if (innerField.get(winPossibility.get(0)) == innerField.get(winPossibility.get(1))
&& innerField.get(winPossibility.get(0)) == innerField.get(winPossibility.get(2))) {
return innerField.get(winPossibility.get(0));
}
}
return Sign.EMPTY;
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36 changes: 36 additions & 0 deletions src/main/java/com/tictactoe/InitServlet.java
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@@ -0,0 +1,36 @@
package com.tictactoe;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.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 {
// Создание новой сессии
HttpSession currentSession = req.getSession(true);

// Создание игрового поля
Field field = new Field();

// Получение списка значений поля
List<Sign> data = field.getInnerFieldData();

// Добавление в сессию параметров поля (нужно будет для хранения состояния между запросами)
currentSession.setAttribute("field", field);
// и значений поля, отсортированных по индексу (нужно для отрисовки крестиков и ноликов)
currentSession.setAttribute("data", data);

// Перенаправление запроса на страницу index.jsp через сервер
getServletContext().getRequestDispatcher("/index.jsp").forward(req, resp);
}
}
108 changes: 108 additions & 0 deletions src/main/java/com/tictactoe/LogicServlet.java
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@@ -0,0 +1,108 @@
package com.tictactoe;

import jakarta.servlet.RequestDispatcher;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;

import java.io.IOException;
import java.util.Enumeration;
import java.util.List;

@WebServlet(name = "LogicServlet", value = "/logic")
public class LogicServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// Получаем текущую сессию
HttpSession currentSession = req.getSession();
// Получаем объект игрового поля из сессии
Field field = extractField(currentSession);

// получаем индекс ячейки, по которой произошел клик
int index = getSelectedIndex(req);
Sign currentSign = field.getInnerField().get(index);

// Проверяем, что ячейка, по которой был клик пустая.
// Иначе ничего не делаем и отправляем пользователя на ту же страницу без изменений
// параметров в сессии
if (Sign.EMPTY != currentSign || field.checkWin() == Sign.CROSS || field.checkWin() == Sign.NOUGHT) {
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/index.jsp");
dispatcher.forward(req, resp);
return;
}
// ставим крестик в ячейке, по которой кликнул пользователь
field.getInnerField().put(index, Sign.CROSS);
if (checkWin(resp, currentSession, field)) {
return;
}

// Получаем пустую ячейку поля
int emptyFieldIndex = field.getEmptyFieldIndex();

if (emptyFieldIndex >= 0) {
field.getInnerField().put(emptyFieldIndex, Sign.NOUGHT);
if (checkWin(resp, currentSession, field)) {
return;
}
}
// Если пустой ячейки нет и никто не победил - значит это ничья
else {
// Добавляем в сессию флаг, который сигнализирует что произошла ничья
currentSession.setAttribute("draw", true);

// Считаем список значков
List<Sign> data = field.getInnerFieldData();

// Обновляем этот список в сессии
currentSession.setAttribute("data", data);

// Шлем редирект
resp.sendRedirect("/index.jsp");
return;
}

// Считаем список значков
List<Sign> data = field.getInnerFieldData();

// Обновляем объект поля и список значков в сессии
currentSession.setAttribute("data", data);
resp.sendRedirect("/index.jsp");
}

private boolean checkWin(HttpServletResponse response, HttpSession currentSession, Field field) throws IOException {
Sign winner = field.checkWin();
if (Sign.CROSS == winner || Sign.NOUGHT == winner) {
// Добавляем флаг, который показывает что кто-то победил
currentSession.setAttribute("winner", winner);

// Считаем список значков
List<Sign> data = field.getInnerFieldData();

// Обновляем этот список в сессии
currentSession.setAttribute("data", data);

// Шлем редирект
response.sendRedirect("/index.jsp");
return true;
}
return false;
}

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) {
return Integer.parseInt(req.getParameter("click"));
}

}
18 changes: 18 additions & 0 deletions src/main/java/com/tictactoe/RestartServlet.java
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@@ -0,0 +1,18 @@
package com.tictactoe;

import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.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");
}
}
51 changes: 48 additions & 3 deletions src/main/webapp/index.jsp
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@@ -1,16 +1,61 @@
<%@ page import="com.tictactoe.Sign" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<title>Tic-Tac-Toe</title>
<link rel="stylesheet" href="static/main.css">
<script src="<c:url value="/static/jquery-3.6.0.min.js"/>"></script>
</head>
<body>
<h1>Tic-Tac-Toe</h1>
<table>
<tr>
<td onclick="window.location='/logic?click=0'">${data.get(0).getSign()}</td>
<td onclick="window.location='/logic?click=1'">${data.get(1).getSign()}</td>
<td onclick="window.location='/logic?click=2'">${data.get(2).getSign()}</td>
</tr>
<tr>
<td onclick="window.location='/logic?click=3'">${data.get(3).getSign()}</td>
<td onclick="window.location='/logic?click=4'">${data.get(4).getSign()}</td>
<td onclick="window.location='/logic?click=5'">${data.get(5).getSign()}</td>
</tr>
<tr>
<td onclick="window.location='/logic?click=6'">${data.get(6).getSign()}</td>
<td onclick="window.location='/logic?click=7'">${data.get(7).getSign()}</td>
<td onclick="window.location='/logic?click=8'">${data.get(8).getSign()}</td>
</tr>
</table>
<hr>
<c:set var="CROSSES" value="<%=Sign.CROSS%>"/>
<c:set var="NOUGHTS" value="<%=Sign.NOUGHT%>"/>


<c:if test="${winner == CROSSES}">
<h1>CROSSES WIN!</h1>
<button onclick="restart()">Start again</button>
</c:if>
<c:if test="${winner == NOUGHTS}">
<h1>NOUGHTS WIN!</h1>
<button onclick="restart()">Start again</button>
</c:if>
<c:if test="${draw}">
<h1>IT'S A DRAW</h1>
<br>
<button onclick="restart()">Start again</button>
</c:if>
<script>

function restart() {
$.ajax({
url: '/restart',
type: 'POST',
contentType: 'application/json;charset=UTF-8',
async: false,
success: function () {
location.href = 'index.jsp'
}
});
}
</script>

</body>
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11 changes: 11 additions & 0 deletions src/main/webapp/static/main.css
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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;
}