@borgar/fx/lib/stringifyPrefix.js

Utilities for working with Excel formulas

const reBannedChars = /[^0-9A-Za-z._¡¤§¨ª\u00ad¯-\uffff]/;

export function stringifyPrefix (ref) {
  let pre = '';
  let quote = 0;
  let nth = 0;
  const context = ref.context || [];
  for (let i = context.length; i > -1; i--) {
    const scope = context[i];
    if (scope) {
      const part = (nth % 2) ? '[' + scope + ']' : scope;
      pre = part + pre;
      quote += +reBannedChars.test(scope);
      nth++;
    }
  }
  if (quote) {
    pre = "'" + pre.replace(/'/g, "''") + "'";
  }
  return pre ? pre + '!' : pre;
}

export function stringifyPrefixAlt (ref) {
  let pre = '';
  let quote = 0;
  const { workbookName, sheetName } = ref;
  if (workbookName) {
    pre += '[' + workbookName + ']';
    quote += +reBannedChars.test(workbookName);
  }
  if (sheetName) {
    pre += sheetName;
    quote += +reBannedChars.test(sheetName);
  }
  if (quote) {
    pre = "'" + pre.replace(/'/g, "''") + "'";
  }
  return pre ? pre + '!' : pre;
}