oberknecht-utils/lib-ts/utils/matchStrings.ts

Utils for oberknecht packages

export function matchStrings(
  searchString: string,
  matchString: string,
  options?: {
    weight?: number;
    ignoreCase?: boolean;
    ignoreSpaces?: boolean;
    ignoreWord?: boolean;
  }
): number {
  let match = 0;
  let weight_ = options?.weight ?? 1;

  let searchString_ = options?.ignoreCase
    ? searchString.toLowerCase()
    : searchString;
  if (options?.ignoreSpaces) searchString_ = searchString_.replace(/\s/g, "");
  
  let matchString_ = options?.ignoreCase
    ? matchString.toLowerCase()
    : matchString;
  if (options?.ignoreSpaces) matchString_ = matchString_.replace(/\s/g, "");

  if (searchString_ === matchString_) match = 100 * weight_;
  else if (matchString_.includes(searchString_)) {
    if (!searchString_.includes(" ") && !options?.ignoreWord) {
      match =
        (1 / matchString_.split(" ").length) *
        weight_ *
        (searchString_.length / matchString_.length) *
        100;
    } else {
      match = (searchString_.length / matchString_.length) * 100 * weight_;
    }
  }

  return Math.round(match);
}