Advent of Code 2023 - Day 19 - Parsing

const parseWorkflowRules = (s) => {
  const parts = s.split(",");
  const rules = [];
  for (const el of parts) {
    const m = el.match(/(a|m|s|x)(<|>)(\d+):(\w+)/);
    if (m) {
      rules.push({
        category: m[1],
        condition: m[2],
        value: parseInt(m[3]),
        next: m[4],
      });
    } else {
      rules.push({
        condition: null,
        next: el,
      });
    }
  }
  return rules;
};
const parseWorkflow = (line) => {
  const matches = line.match(/(\w+){(.*)}/);
  return {
    label: matches[1],
    rules: parseWorkflowRules(matches[2]),
  };
};
const parsePart = (line) => {
  return line.split(",").reduce((part, e) => {
    const m = e.match(/(x|m|a|s)=(\d+)/);
    part[m[1]] = parseInt(m[2]);
    return part;
  }, {});
};
const parse = (input) => {
  const sections = input.trim().split(/\r?\n\r?\n/);
  const lines1 = utils.getInputLines(sections[0]);
  const lines2 = utils.getInputLines(sections[1]);
  const workflows = {};
  for (const line of lines1) {
    const flow = parseWorkflow(line);
    workflows[flow.label] = flow.rules;
  }
  const parts = lines2.map(parsePart);
  return {
    parts: parts,
    workflows: workflows,
  };
};