calendar-smart-contract

// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;

contract Calendar { struct Event { string title; uint256 date; string description; bool exists; }

mapping(address => mapping(uint256 => Event)) public userEvents;

event EventCreated(address indexed user, uint256 date, string title);
event EventDeleted(address indexed user, uint256 date);

function createEvent(uint256 date, string memory title, string memory description) public {
    require(!userEvents[msg.sender][date].exists, "Event already exists on this date");
    
    userEvents[msg.sender][date] = Event(title, date, description, true);
    emit EventCreated(msg.sender, date, title);
}

function getEvent(uint256 date) public view returns (string memory, uint256, string memory) {
    require(userEvents[msg.sender][date].exists, "No event found on this date");
    
    Event storage eventDetails = userEvents[msg.sender][date];
    return (eventDetails.title, eventDetails.date, eventDetails.description);
}

function deleteEvent(uint256 date) public {
    require(userEvents[msg.sender][date].exists, "No event to delete on this date");
    
    delete userEvents[msg.sender][date];
    emit EventDeleted(msg.sender, date);
}

}