freeCodeCamp/validation/guide-folder-checks/check-path.js

const { frontmatterCheck } = require('./frontmatter-check');

const allowedLangDirNames = [
  "arabic",
  "chinese",
  "english",
  "portuguese",
  "russian",
  "spanish"
];

const checkPath = (fullPath, fileContent) => {
  let errorMsgs = [];
  const remaining = fullPath.split("/");

  if (!allowedLangDirNames.includes(remaining[1])) {
    errorMsgs.push({
      msg: `\`${remaining[1]}\` is not a valid language directory`,
      fullPath
    });
  }

  if (remaining[remaining.length - 1] !== "index.md") {
    errorMsgs.push({
      msg: `\`${remaining[remaining.length - 1]}\` is not a valid file name, please use \`index.md\``,
      fullPath
    });
  } else if (remaining[2] === "index.md") {
    errorMsgs.push({
      msg: `This file is not in its own sub-directory`,
      fullPath
    });
  }

  const dirName = fullPath.replace("/index.md", "");
  if (dirName.replace(/(\s|\_)/, "") !== dirName) {
    errorMsgs.push({
      msg: `Invalid character found in a directory name, please use \`-\` as separators`,
      fullPath
    });
  }

  if (dirName.toLowerCase() !== dirName) {
    errorMsgs.push({
      msg: `Upper case characters found in the file path, all file paths must be lower case`,
      fullPath
    });
  }

  const isTranslation = allowedLangDirNames.includes(remaining[1]) && remaining[1] !== 'english';
  const frontMatterErrMsgs = frontmatterCheck(fullPath, isTranslation, fileContent);

  return errorMsgs.concat(frontMatterErrMsgs);
};

module.exports = { checkPath };