tell-me-when/util/ParseState.mjs

human relative date and time parser

export class ParseState {
  index = 0;
  start;
  end;
  flags;
  constructor(input, {
    start = 0,
    end = input.length,
    flags = 'g'
  } = {}) {
    this.input = input;
    this.start = start;
    this.end = end;
    this.flags = flags;
  }
  get done() {
    return this.index >= this.end;
  }
  testLowerCase(pattern) {
    if (this.input.substring(this.index, this.index + pattern.length).toLowerCase() === pattern) {
      this.index += pattern.length;
      return true;
    }
    return false;
  }
  testRegex(pattern) {
    pattern.lastIndex = this.index;
    if (pattern.test(this.input)) {
      this.index = pattern.lastIndex;
      return true;
    }
    return false;
  }
}
export function toRegExp(s, flags = '') {
  return new RegExp(s.replace(/[/\-\\^$*+?.()|[\]{}]/g, '\\$&'), flags);
}
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