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contracts...NFTTallinn.sol

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

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

contract NFTTallinnTicket is ERC721URIStorage {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    constructor() ERC721("NFTTallin", "NFTL") {}

    function creatTicket(address visitor, string memory tokenURI)
        public
        returns (uint256)
    {
        _tokenIds.increment();

        uint256 newItemId = _tokenIds.current();
        _mint(visitor, newItemId);
        _setTokenURI(newItemId, tokenURI);

        return newItemId;
    }
}

/**
{
    "name": "NFT Tallinn",
    "description": "NFT Tallinn aims to connect NFT creators, collectors and other web3 industry pioneers.",
    "image": "https://nfttallinn.ee/ticket-hfn84n.png",
    "ticketType": "regular"
}

{
    "name": "NFT Tallinn",
    "description": "NFT Tallinn aims to connect NFT creators, collectors and other web3 industry pioneers.",
    "image": "https://nfttallinn.ee/ticket-hfn84n.png",
    "ticketType": "vip" 
}

**/

enum TicketType {
    Regular,
    VIP
}

struct Ticket {
    uint256 id;
    TicketType ticketType;
}

contract NFTTallinn {
    mapping(address => Ticket) private tickets;

    NFTTallinnTicket private nftTallinnTicket;

    constructor(NFTTallinnTicket _nftTallinnTicket) {
        nftTallinnTicket = _nftTallinnTicket;
    }

    
    function createTicket(address _address, TicketType ticketType) external {
        uint256 ticketId = nftTallinnTicket.creatTicket(_address, "http://nft.tallinn");

        tickets[_address] = Ticket({
            id: ticketId,
            ticketType: ticketType
        });
    }

    function getMyTickets() external view returns (Ticket memory) {

        // check if ticket exists

        return tickets[msg.sender];
    }

    function checkEntrance(address _address, uint256 ticketId) external view returns(bool) {
        return nftTallinnTicket.ownerOf(ticketId) == _address;
    }
}