feat: username data

src/plasa/Plasa.sol

@@ -49,4 +49,39 @@ contract Plasa is Ownable, IPlasa {
 	function getUsername(address user) public view returns (string memory) {
 		return names.userToName(user);
 	}
+
+	/**
+	 * @dev Retrieves the usernames associated with an array of user addresses.
+	 * @param users The addresses of the users whose usernames are to be retrieved.
+	 * @return string[] memory An array of usernames corresponding to the input addresses.
+	 */
+	function getUsernames(address[] memory users) public view returns (string[] memory) {
+		string[] memory usernames = new string[](users.length);
+		for (uint256 i = 0; i < users.length; i++) {
+			usernames[i] = getUsername(users[i]);
+		}
+		return usernames;
+	}
+
+	/**
+	 * @dev Retrieves the username data associated with a given user address.
+	 * @param user The address of the user whose username data is to be retrieved.
+	 * @return UsernameData memory The username data of the user.
+	 */
+	function getUsernameData(address user) public view returns (UsernameData memory) {
+		return UsernameData({ user: user, name: getUsername(user) });
+	}
+
+	/**
+	 * @dev Retrieves the username data associated with an array of user addresses.
+	 * @param users The addresses of the users whose username data is to be retrieved.
+	 * @return UsernameData[] memory An array of UsernameData structures corresponding to the input addresses.
+	 */
+	function getUsernamesData(address[] memory users) public view returns (UsernameData[] memory) {
+		UsernameData[] memory usernameData = new UsernameData[](users.length);
+		for (uint256 i = 0; i < users.length; i++) {
+			usernameData[i] = getUsernameData(users[i]);
+		}
+		return usernameData;
+	}
 }

src/plasa/interfaces/IPlasa.sol

@@ -6,6 +6,14 @@ import { INames } from "../../names/INames.sol";
 /// @title IPlasa Interface
 /// @dev This interface defines the functions for user registration and username retrieval in the Plasa system.
 interface IPlasa {
+	/// @notice Struct to hold username data.
+	/// @param user The address of the user.
+	/// @param name The username of the user.
+	struct UsernameData {
+		address user;
+		string name;
+	}
+
 	/// @notice Checks if a user is registered in the Plasa system.
 	/// @param user The address of the user to check.
 	/// @return bool Returns true if the user is registered, false otherwise.
@@ -23,4 +31,14 @@ interface IPlasa {
 	/// @notice The names contract interface.
 	/// @return INames Returns the names contract.
 	function names() external view returns (INames);
+
+	/// @notice Retrieves the username data associated with an array of user addresses.
+	/// @param user The address of the user whose username is to be retrieved.
+	/// @return UsernameData The username data of the user.
+	function getUsernameData(address user) external view returns (UsernameData memory);
+
+	/// @notice Retrieves the usernames associated with an array of user addresses.
+	/// @param users The addresses of the users whose usernames are to be retrieved.
+	/// @return UsernameData[] memory An array of UsernameData structures corresponding to the input addresses.
+	function getUsernamesData(address[] memory users) external view returns (UsernameData[] memory);
 }