Contract to help with Pre reveal metadata for NFT smart contract

PreRevealedTokens.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/[email protected]/token/ERC721/ERC721.sol";
import "@openzeppelin/[email protected]/access/Ownable.sol";
import "@openzeppelin/[email protected]/utils/Counters.sol";

contract PreRevealedTokens is ERC721, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    bool public isRevealed = false;
    string preRevealedURI = "https://www.jsonkeeper.com/b/S00G";
    string baseURI = "";

    constructor() ERC721("PreRevealedTokens", "PRT") {}

    function _baseURI() internal view override returns (string memory) {
        return baseURI;
    }

    function safeMint(address to) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
    }

    function tokenURI(uint256 tokenId)
        public
        view virtual
        override
        returns (string memory) {
            if (isRevealed) {
                return super.tokenURI(tokenId);
            }

            return preRevealedURI;
    }

    function setPreRevealedURI(string memory _preRevealedURI) 
        external onlyOwner {
            preRevealedURI = _preRevealedURI;
    }

    function revealAndSetBaseURI(string memory baseURI_) 
        external onlyOwner {
            isRevealed = true;
            baseURI = baseURI_;
    }
}