LowerCase EVM Package

LowerCase.sol

//Original Code:
//https://gist.github.com/ottodevs/c43d0a8b4b891ac2da675f825b1d1dbf
//Credit: ottodevs
//EVM Package: Dennison Bertram, dennison@dennisonbertram.com

pragma solidity ^0.4.24;
import "zos-lib/contracts/Initializable.sol";

contract LowerCase is Initializable{

    uint usage;
//set initializer here.....
    function initialize() {
        usage = 0;
    }

    function _toLower(string memory str) internal returns (string memory) {
        bytes memory bStr = bytes(str);
        bytes memory bLower = new bytes(bStr.length);
        for (uint i = 0; i < bStr.length; i++) {
            // Uppercase character...
            if ((bStr[i] >= 65) && (bStr[i] <= 90)) {
                // So we add 32 to make it lowercase
                bLower[i] = bytes1(int(bStr[i]) + 32);
            } else {
                bLower[i] = bStr[i];
            }
        }
        usage++;
        return string(bLower);
    }
    
    function toLower(string str) external returns(string){
        return(_toLower(str));
    }

    function usageCount() external view returns(uint){
        return usage;
    }
}