"use strict";
const PATTERN_REGEX = /%(-)?(\d+)?(?:\.(\d+))?([a-zA-Z%])(?:\{([^}]+)\})?/g;
function compilePattern(pattern, createConverter, literalConverter) {
  const converters = [];
  let lastIndex = 0;
  let match;
  while ((match = PATTERN_REGEX.exec(pattern)) !== null) {
    const [full, align, minWidth, precision, specifier, format] = match;
    if (match.index > lastIndex) {
      converters.push(literalConverter(pattern.substring(lastIndex, match.index)));
    }
    const converter = createConverter(
      specifier,
      align === "-",
      parseInt(minWidth || "0", 10),
      parseInt(precision || "0", 10),
      format
    );
    if (converter) {
      converters.push(converter);
    }
    lastIndex = match.index + full.length;
  }
  if (lastIndex < pattern.length) {
    converters.push(literalConverter(pattern.substring(lastIndex)));
  }
  return converters;
}
module.exports = compilePattern;