8840cd97b1
Added JSDoc and helpful comments throughout. Allowed new lines in tweets. Tweet box focussed on render. After user creation, user taken to update profile page. Handle form submit and enter pressed on all forms Now handles changing user/route by re-searching for different user. Begin adding contract tests (WIP)
68 lines
2.0 KiB
Solidity
68 lines
2.0 KiB
Solidity
pragma solidity ^0.4.24;
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contract DTwitter {
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struct User {
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uint creationDate;
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string username;
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string description;
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address owner;
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string picture;
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string[] tweets;
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}
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mapping (bytes32 => User) public users;
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mapping (address => bytes32) public owners;
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event NewTweet(
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bytes32 indexed _from,
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string tweet
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);
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function createAccount(string username, string description) public {
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require(bytes(username).length > 0);
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bytes32 usernameHash = keccak256(abi.encodePacked(username));
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// reject if username already registered
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require(users[usernameHash].creationDate == 0);
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// reject if sending adddress already created a user
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require(owners[msg.sender] == 0);
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users[usernameHash].creationDate = now;
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users[usernameHash].owner = msg.sender;
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users[usernameHash].username = username;
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users[usernameHash].description = description;
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owners[msg.sender] = usernameHash;
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}
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function userExists(string username) public view returns (bool) {
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bytes32 usernameHash = keccak256(abi.encodePacked(username));
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return users[usernameHash].creationDate != 0;
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}
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function editAccount(string username, string description, string pictureHash) public {
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bytes32 usernameHash = keccak256(abi.encodePacked(username));
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require(users[usernameHash].owner == msg.sender);
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users[usernameHash].description = description;
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if (bytes(pictureHash).length > 0) {
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users[usernameHash].picture = pictureHash;
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}
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}
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function tweet(string username, string content) public {
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bytes32 usernameHash = keccak256(abi.encodePacked(username));
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require(users[usernameHash].owner == msg.sender);
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User storage user = users[usernameHash];
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uint tweetIndex = user.tweets.length++;
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user.tweets[tweetIndex] = content;
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emit NewTweet(usernameHash, content);
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}
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}
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