anything-llm/frontend/src/utils/directories.js

export function formatDate(dateString) {
  const date = isNaN(new Date(dateString).getTime())
    ? new Date()
    : new Date(dateString);
  const options = { year: "numeric", month: "short", day: "numeric" };
  const formattedDate = date.toLocaleDateString("en-US", options);
  return formattedDate;
}

export function getFileExtension(path) {
  const match = path.match(/[^\/\\&\?]+\.\w{1,4}(?=([\?&].*$|$))/);
  return match ? match[0].split(".").pop() : "file";
}

export function truncate(str, n) {
  const fileExtensionPattern = /(\..+)$/;
  const extensionMatch = str.match(fileExtensionPattern);

  if (str.length <= n) return str;

  if (extensionMatch && extensionMatch[1]) {
    const extension = extensionMatch[1];
    const nameWithoutExtension = str.replace(fileExtensionPattern, "");
    const truncationPoint = Math.max(0, n - extension.length - 4);
    const truncatedName =
      nameWithoutExtension.substr(0, truncationPoint) +
      "..." +
      nameWithoutExtension.slice(-4);

    return truncatedName + extension;
  } else {
    return str.length > n ? str.substr(0, n - 8) + "..." + str.slice(-4) : str;
  }
}