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Update Social.sol #1

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Update Social.sol #1

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88 changes: 52 additions & 36 deletions contracts/Social.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -37,9 +37,10 @@ contract SocialMedia {
event CommentAdded(address indexed commenter, uint256 indexed postId, string content, uint256 timestamp);

modifier onlyRegisteredUser() {
require(users[msg.sender].isRegistered, "User is not registered");
_;
}
require(users[msg.sender].isRegistered, "User is not registered");
_;
}


modifier onlyOwner() {
require(msg.sender == owner, "Only owner can call this function");
Expand All @@ -51,17 +52,29 @@ contract SocialMedia {
}

function registerUser(string memory _username) external {
require(!users[msg.sender].isRegistered, "User is already registered");
require(bytes(_username).length > 0, "Username should not be empty");
require(!users[msg.sender].isRegistered, "User is already registered");
require(bytes(_username).length > 0, "Username should not be empty");
require(bytes(_username).length <= 32, "Username should not exceed 32 characters");

// Check if the username is already taken
bool isUsernameTaken = false;
for (uint256 i = 0; i < posts.length; i++) {
if (keccak256(bytes(users[posts[i].author].username)) == keccak256(bytes(_username))) {
isUsernameTaken = true;
break;
}
}
require(!isUsernameTaken, "Username is already taken");

users[msg.sender] = User({
username: _username,
userAddress: msg.sender,
isRegistered: true
});
users[msg.sender] = User({
username: _username,
userAddress: msg.sender,
isRegistered: true
});

emit UserRegistered(msg.sender, _username);
}

emit UserRegistered(msg.sender, _username);
}


function getUserByAddress(address _userAddress) external view returns (User memory) {
Expand All @@ -70,18 +83,19 @@ contract SocialMedia {
}

function createPost(string memory _content) external onlyRegisteredUser {
require(bytes(_content).length > 0, "Content should not be empty");

posts.push(Post({
author: msg.sender,
content: _content,
timestamp: block.timestamp,
likes: 0,
commentsCount: 0
}));

emit PostCreated(msg.sender, _content, block.timestamp);
}
require(bytes(_content).length > 0, "Content should not be empty");
require(bytes(_content).length <= 280, "Content should not exceed 280 characters");

posts.push(Post({
author: msg.sender,
content: _content,
timestamp: block.timestamp,
likes: 0,
commentsCount: 0
}));

emit PostCreated(msg.sender, _content, block.timestamp);
}

function likePost(uint256 _postId) external onlyRegisteredUser {
require(_postId < posts.length, "Post does not exist");
Expand All @@ -93,21 +107,23 @@ contract SocialMedia {
}

function addComment(uint256 _postId, string memory _content) external onlyRegisteredUser {
require(_postId < posts.length, "Post does not exist");
require(bytes(_content).length > 0, "Comment should not be empty");
require(_postId < posts.length, "Post does not exist");
require(bytes(_content).length > 0, "Comment should not be empty");
require(bytes(_content).length <= 200, "Comment should not exceed 200 characters");

uint256 commentId = postCommentsCount[_postId];
postComments[_postId][commentId] = Comment({
commenter: msg.sender,
content: _content,
timestamp: block.timestamp
});
uint256 commentId = postCommentsCount[_postId];
postComments[_postId][commentId] = Comment({
commenter: msg.sender,
content: _content,
timestamp: block.timestamp
});

postCommentsCount[_postId]++;
posts[_postId].commentsCount++;
postCommentsCount[_postId]++;
posts[_postId].commentsCount++;

emit CommentAdded(msg.sender, _postId, _content, block.timestamp);
}

emit CommentAdded(msg.sender, _postId, _content, block.timestamp);
}

function getPostsCount() external view returns (uint256) {
return posts.length;
Expand Down