BattleHeroBreeder.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "../node_modules/@openzeppelin/contracts/utils/Strings.sol";
import "../node_modules/@openzeppelin/contracts/access/AccessControlEnumerable.sol";
import "./shared/IBattleHeroFactory.sol";
import "./shared/IBattleHero.sol";
import "./shared/IBattleHeroGenScience.sol";

contract BattleHeroBreeder is
    AccessControlEnumerable {
    
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant BREED_ROLE  = keccak256("BREED_ROLE");

    IBattleHeroGenScience _genScience;
    IBattleHeroFactory _erc721factory;

    using Strings for uint256;

    constructor(
    address genScience, 
    address erc721) {
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
        _setupRole(BREED_ROLE, _msgSender());        
        setGenScience(genScience);
        setERC721Factory(erc721);
    }
    modifier isSetup() {
        require(address(_genScience) != address(0), "Setup not correctly");
        require(address(_erc721factory) != address(0), "Setup not correctly");
        _;
    }

    function setGenScience(address genScience) public{ 
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()));
        _genScience = IBattleHeroGenScience(genScience);
    }
    function setERC721Factory(address erc721) public{ 
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()));
        _erc721factory = IBattleHeroFactory(erc721);
    }
    function addBreeder(address breeder) public {
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "Invalid role for add breder");
        _setupRole(BREED_ROLE, breeder);
    }
    function breed(address to, string memory gen) isSetup public returns(uint)  {        
        require(hasRole(BREED_ROLE, _msgSender()), "Invalid role for breed");
        uint tokenId = _erc721factory.mint(to, gen);
        return tokenId;
    }
    function breedRandom() isSetup public returns (uint){
        require(hasRole(BREED_ROLE, _msgSender()), "Invalid role for breed random");
        string memory randomGen = _genScience.generate();
        return breed(msg.sender, randomGen);    
    }
}