온라인 투표 시스템을 설계하고 구현해야 합니다. 시스템은 사용자가 설문 조사를 생성, 관리 및 참여할 수 있도록 허용해야 합니다. 각 설문 조사는 질문과 답변에 대한 여러 옵션으로 구성됩니다. 사용자는 설문조사에 투표하고 결과를 볼 수 있습니다.
createPoll :
updatePoll :
설문조사 삭제 :
voteInPoll :
설문조사 결과 보기 :
{
"pollId": "123",
"question": "What is your favorite color?",
"options": ["Red", "Blue", "Green", "Yellow"],
"createdAt": "2024-07-11T00:00:00Z"
}
{
"pollId": "123",
"userId": "user1",
"option": "Red",
"timestamp": "2024-07-11T01:00:00Z"
}
이 코드는 JavaScript 클래스를 사용하여 기본 폴링 시스템을 정의합니다. 설문조사의 생성, 관리, 투표가 가능합니다. 코드의 각 부분을 분석해 보겠습니다.
createPoll(question, options)
updatePoll(pollId, question, options)
deletePoll(pollId)
voteInPoll(pollId, userId, option)
viewPollResults(pollId)
This implementation provides a basic but functional polling system, handling common scenarios such as poll creation, updating, voting, and deletion.
class Poll {
constructor(id, question, options) {
this.pollId = id;
this.question = question;
this.options = options;
this.createdAt = new Date();
}
}
class Vote {
constructor(pollId, userId, option) {
this.pollId = pollId;
this.userId = userId;
this.option = option;
this.timestamp = new Date();
}
}
class PollManager {
constructor() {
this.polls = new Map();
this.pollResults = new Map();
this.userVotes = new Map();
}
createPoll(question, options) {
const pollId = (this.polls.size + 1).toString();
const poll = new Poll(pollId, question, options);
this.polls.set(pollId, poll);
const result = new Map();
options.forEach(option => result.set(option, 0));
this.pollResults.set(pollId, result);
return pollId;
}
updatePoll(pollId, question, options) {
const poll = this.polls.get(pollId);
if (poll) {
poll.question = question;
poll.options = options;
// Update results for the new options
const result = new Map();
options.forEach(option => result.set(option, 0));
this.pollResults.set(pollId, result);
return "Poll updated successfully.";
}
return "Poll not found.";
}
deletePoll(pollId) {
if (this.polls.delete(pollId)) {
this.pollResults.delete(pollId);
this.userVotes.delete(pollId);
return "Poll deleted successfully.";
}
return "Poll not found.";
}
voteInPoll(pollId, userId, option) {
const poll = this.polls.get(pollId);
if (poll) {
if (!this.userVotes.has(pollId)) {
this.userVotes.set(pollId, new Map());
}
const userVote = this.userVotes.get(pollId);
if (userVote.get(userId)) {
return "User has already voted.";
}
const result = this.pollResults.get(pollId);
if (result.has(option)) {
result.set(option, result.get(option) + 1);
userVote.set(userId, true);
return "Vote cast successfully.";
} else {
return "Invalid option.";
}
}
return "Poll not found.";
}
viewPollResults(pollId) {
const results = this.pollResults.get(pollId);
if (results) {
return Array.from(results.entries());
}
return "Poll not found.";
}
}
// Example usage
const pollManager = new PollManager();
// Creating a poll
const pollId = pollManager.createPoll("What is your favorite color?", ["Red", "Blue", "Green", "Yellow"]);
console.log("Poll created with ID:", pollId);
// Voting in the poll
let voteMessage = pollManager.voteInPoll(pollId, "user1", "Red");
console.log(voteMessage);
voteMessage = pollManager.voteInPoll(pollId, "user2", "Blue");
console.log(voteMessage);
voteMessage = pollManager.voteInPoll(pollId, "user1", "Green");
console.log(voteMessage); // Should inform the user has already voted
// Viewing poll results
let results = pollManager.viewPollResults(pollId);
console.log("Poll results for poll ID", pollId, ":", results);
// Updating the poll
let updateMessage = pollManager.updatePoll(pollId, "What is your favorite primary color?", ["Red", "Blue", "Yellow"]);
console.log(updateMessage);
// Voting in the updated poll
voteMessage = pollManager.voteInPoll(pollId, "user3", "Yellow");
console.log(voteMessage);
// Viewing updated poll results
results = pollManager.viewPollResults(pollId);
console.log("Updated poll results for poll ID", pollId, ":", results);
// Deleting the poll
let deleteMessage = pollManager.deletePoll(pollId);
console.log(deleteMessage);
// Attempting to view results of a deleted poll
results = pollManager.viewPollResults(pollId);
if (typeof results === "string") {
console.log(results);
}
// Response
// Poll created with ID: 1
// Vote cast successfully.
// Vote cast successfully.
// User has already voted.
// Poll results for poll ID 1 : [['Red', 1], ['Blue', 1], ['Green', 0], ['Yellow', 0]]
// Poll updated successfully.
// Vote cast successfully.
// Updated poll results for poll ID 1 : [['Red', 0], ['Blue', 0], ['Yellow', 1]]
// Poll deleted successfully.
// Poll not found.
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Hastag: SystemDesignWithZeeshanAli
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