Advent of Code 2023-20dot

const { exec } = require("child_process");
const { writeFileSync, readFileSync } = require("fs");

const input = readFileSync("data.txt", "utf8");
const types = [[], []];
const edges = [];

let output = "digraph {\n{\nbroadcaster [shape=invtrapezium]\n";

input.split("\n").forEach((l) => {
  const {
    groups: { t, k, m },
  } = l.match(/(?<t>[%&]?)(?<k>.+) -> (?<m>.+)/);
  if (t === "%") types[0].push(k);
  if (t === "&") types[1].push(k);
  edges.push(`${k} -> ${m}`);
});

output += types[0].join(", ") + " [shape=diamond]\n";
output += types[1].join(", ") + " [shape=invhouse]\n";
output += "rx [shape=trapezium]\n";
output += "}\n";

output += edges.join("\n") + "\n}\n";

writeFileSync("data.dot", output);
exec("dot -Tpng data.dot -o data.png");