SismondiNFT.sol

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.0;

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


import {Base64} from "./libraries/Base64.sol";

contract SismondiNFT is ERC721URIStorage {

    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    uint256 public totalSupply;

    string images_prefix ="data:image/png;base64,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";

    string[] images = [
"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",
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"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"    ];
    string[] wordList = ["One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight"];

    event NewSismondiNFTMinted(address sender, uint256 tokenId);


    constructor() ERC721 ("Sismondi Shoes Short", "SiSho4") {
        totalSupply = 10;
    }

    function pickRandomWord(uint256 tokenId) internal view returns (string memory) {
        uint256 rand = random(string(abi.encodePacked("WORD", Strings.toString(tokenId))));
        rand = rand % wordList.length;
        return wordList[rand];
    }

    function pickRandomImage(uint256 tokenId) internal view returns (string memory) {
        uint256 rand = random(string(abi.encodePacked("WORD", Strings.toString(tokenId))));
        rand = rand % images.length;
        return images[rand];
    }

    function random(string memory input) internal pure returns (uint256) {
        return uint256(keccak256(abi.encodePacked(input)));
    }

    function makeSismondiNFT() public {
        uint256 newItemId = _tokenIds.current();
        require(newItemId < totalSupply, "Total supply has been reached!");

        string memory randomWord = pickRandomWord(newItemId);
        string memory randomImage = pickRandomImage(newItemId);

        string memory TOKEN_JSON_URI = getTokenURI(randomWord, randomImage);

        _safeMint(_msgSender(), newItemId);
        _setTokenURI(newItemId, TOKEN_JSON_URI);
        _tokenIds.increment();
        emit NewSismondiNFTMinted(_msgSender(), newItemId);
    }

    function getTokenURI(string memory words, string memory pngString) internal view returns (string memory) {

        string memory json = Base64.encode(
            bytes(
                string(
                    abi.encodePacked(
                        '{"name": "', words,
                        '", "description": "A Sismondi NFT collection.",'
                        '"image": "', images_prefix, pngString,
                        '"}'
                    )
                )
            )
        );

        string memory finalTokenUri = string(
            abi.encodePacked("data:application/json;base64,", json)
        );

        return finalTokenUri;
    }

    function getTotalNFTsMintedSoFar() public view returns (uint256) {
        return _tokenIds.current();
    }
}