SOURCE

// midjourney prompt 格式校验
function isValidString(inputString) {
    const index = inputString.indexOf("--");
    if (index == -1) {
        return true;
    }
    inputString = inputString.substring(index);
    const regex = /--[A-Za-z]+ [A-Za-z0-9:.]+/g;
    const matches = inputString.match(regex);

    if (!matches) {
        return false;
    }

    // 拼接匹配到的子串，然后与原字符串比较
    const reconstructed = matches.join(' ');
    return reconstructed === inputString;
}

// midjourney prompt 预处理
function replacePunctuation(input) {
  const keywords = [
    "Aspect",
    "ar",
    "chaos",
    "fast",
    "iw",
    "no",
    "quality",
    "q",
    "relax",
    "repeat",
    "r",
    "seed",
    "stop",
    "style",
    "stylize",
    "s",
    "tile",
    "turbo",
    "weird",
    "w",
  ];

  let output = input.replace(
    new RegExp(`--(?!${keywords.join("|")})`, "g"),
    ","
  );

  // 匹配除英文逗号和空格以外的标点符号，排除任意语种的文字
  const regExp = /(?![\s.,:-])\p{P}/gu;
  // 使用replace方法替换匹配到的标点符号为英文逗号
  output = output.replace(regExp, ",");
  output = output.trim();
  return output;
}

const finalPrompt = replacePunctuation("An exquisite rose, with velvety petals in shades of deep red, unfurling gracefully amidst a bed of lush green leaves. Each petal is adorned with delicate dewdrops, glistening in the morning sunlight. The flower emits a captivating fragrance, filling the air with its sweet scent. A gentle breeze dances through the garden, causing the petals to sway and come to life. --ar 1:1");
console.log(finalPrompt);
const isValid = isValidString(finalPrompt);
console.log(isValid);