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Create 김윤희 1주차 과제 #3

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Create 김윤희 1주차 과제 #3

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113 changes: 113 additions & 0 deletions 김윤희 1주차 과제
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<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>간단한 선거 시스템</title>
</head>
<body>
<h2>회원가입</h2>
<form id="signupForm">
<input type="text" id="signupUsername" placeholder="Username" required>
<input type="password" id="signupPassword" placeholder="Password" required>
<select id="signupRegion" required>
<option value="서울">서울</option>
<option value="부산">부산</option>
<option value="대구">대구</option>
</select>
<button type="submit">회원가입</button>
</form>

<h2>로그인</h2>
<form id="loginForm">
<input type="text" id="loginUsername" placeholder="Username" required>
<input type="password" id="loginPassword" placeholder="Password" required>
<button type="submit">로그인</button>
</form>

<h2>후보 등록</h2>
<form id="candidateForm">
<input type="text" id="candidateName" placeholder="후보 이름" required>
<button type="submit">후보 등록</button>
</form>

<h2>후보 목록</h2>
<div id="candidateList"></div>

<script>
// 로컬 스토리지를 활용한 회원가입
document.getElementById("signupForm").addEventListener("submit", function (e) {
e.preventDefault();
const username = document.getElementById("signupUsername").value;
const password = document.getElementById("signupPassword").value;
const region = document.getElementById("signupRegion").value;

const users = JSON.parse(localStorage.getItem("users")) || [];
users.push({ username, password, region });
localStorage.setItem("users", JSON.stringify(users));
alert("회원가입 성공!");
});

// 로그인 기능 구현
document.getElementById("loginForm").addEventListener("submit", function (e) {
e.preventDefault();
const username = document.getElementById("loginUsername").value;
const password = document.getElementById("loginPassword").value;

const users = JSON.parse(localStorage.getItem("users")) || [];
const user = users.find(u => u.username === username && u.password === password);
if (user) {
localStorage.setItem("loggedInUser", JSON.stringify(user));
alert("로그인 성공!");
displayCandidates(user.region);
} else {
alert("로그인 실패! 아이디와 비밀번호를 확인하세요.");
}
});

// 후보 등록 기능 구현
document.getElementById("candidateForm").addEventListener("submit", function (e) {
e.preventDefault();
const loggedInUser = JSON.parse(localStorage.getItem("loggedInUser"));
if (!loggedInUser) {
alert("로그인이 필요합니다!");
return;
}

const candidateName = document.getElementById("candidateName").value;
const candidates = JSON.parse(localStorage.getItem("candidates")) || {};
if (!candidates[loggedInUser.region]) {
candidates[loggedInUser.region] = [];
}
candidates[loggedInUser.region].push(candidateName);
localStorage.setItem("candidates", JSON.stringify(candidates));
alert("후보 등록 완료!");
displayCandidates(loggedInUser.region);
});

// 후보 목록 표시
function displayCandidates(region) {
const candidates = JSON.parse(localStorage.getItem("candidates")) || {};
const candidateList = candidates[region] || [];
const candidateListDiv = document.getElementById("candidateList");
candidateListDiv.innerHTML = "";
candidateList.forEach((candidate, index) => {
const candidateElement = document.createElement("div");
candidateElement.innerHTML = `
<input type="checkbox" id="candidate${index}" name="candidate" value="${candidate}">
<label for="candidate${index}">${candidate}</label>
`;
candidateListDiv.appendChild(candidateElement);
});
}

// 로그인 된 상태이면 후보 목록 표시
window.onload = function () {
const loggedInUser = JSON.parse(localStorage.getItem("loggedInUser"));
if (loggedInUser) {
displayCandidates(loggedInUser.region);
}
};
</script>
</body>
</html>