fuzzy-regex/dist/index.js

A regular expression library for Node.js that allows for a configurable number of mismatches (fuzzy matching), powered by the high-performance [TRE](https://laurikari.net/tre/) regex engine. This package supports both ESM and CommonJS, and provides a simp

// src/tre.ts
import { createRequire } from "module";
var require2 = createRequire(import.meta.url);
var path = "./tre.node";
var addon = require2(path);
var TreLib;
if (typeof addon === "object") {
  TreLib = addon.Tre;
}
if (typeof addon === "string") {
  TreLib = require2(addon).Tre;
}
if (!TreLib) {
  throw new Error("Failed to load tre");
}
var Tre = TreLib;

// src/index.ts
function fuzzyRegex(pattern, options) {
  const patternString = pattern instanceof RegExp ? pattern.source : pattern;
  let insensitive = true;
  if (options?.caseInsensitive !== void 0) {
    insensitive = options.caseInsensitive;
  } else if (pattern instanceof RegExp) {
    insensitive = pattern.ignoreCase;
  }
  if (options?.caseInsensitive !== void 0 && pattern instanceof RegExp && pattern.ignoreCase !== options.caseInsensitive) {
    throw new Error("Case sensitivity mismatch");
  }
  const tre = new Tre(patternString, insensitive);
  function getOptions(str) {
    const min = Math.min(str.length, patternString.length);
    const defaultMaxErrs = Math.floor(min / 10) + (min % 10 > 5 ? 1 : 0);
    return {
      costIns: options?.costIns ?? 1,
      costDel: options?.costDel ?? 1,
      costSubst: options?.costSubst ?? 1,
      maxCost: options?.maxCost ?? defaultMaxErrs,
      maxIns: options?.maxIns ?? defaultMaxErrs,
      maxDel: options?.maxDel ?? defaultMaxErrs,
      maxSubst: options?.maxSubst ?? defaultMaxErrs,
      maxErr: options?.maxErr ?? defaultMaxErrs
    };
  }
  return {
    test: (str) => {
      return tre.fuzzy(str, getOptions(str));
    },
    exec: (str) => {
      return tre.fuzzyExec(str, getOptions(str));
    },
    toString: () => {
      return patternString;
    }
  };
}
export {
  fuzzyRegex
};
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