cli.js

#!/usr/bin/env node
const c = {
  reset: "\x1b[0m",
  bold: "\x1b[1m",
  dim: "\x1b[2m",
  green: "\x1b[32m",
  yellow: "\x1b[33m",
};

const fuels = [
  { id: "1", name: "Super Plus 98 (E5)", aliases: ["98", "e5", "super98"] },
  { id: "2", name: "Euro 95 (E10)", aliases: ["95", "e10", "euro95"] },
  { id: "6", name: "Diesel (B7)", aliases: ["diesel", "b7"] },
  { id: "7", name: "LPG", aliases: ["lpg"] },
  { id: "12", name: "Premium Diesel", aliases: ["p-diesel"] },
  { id: "13", name: "Premium Benzine", aliases: ["p-95"] },
  { id: "14", name: "Aardgas", aliases: ["gas"] },
  { id: "17", name: "Biodiesel", aliases: ["bio"] },
];

const fuelByAlias = Object.fromEntries(
  fuels.flatMap((f) => f.aliases.map((a) => [a, f])),
);

function showHelp() {
  const help = `
    Usage
      $ pomp <postcode> [--type=95]

    Options
      --type, -t   Fuel type alias

    Fuel types
      e10, 95      Euro 95 (E10)
      e5, 98       Super Plus 98 (E5)
      diesel, b7   Diesel (B7)
      lpg          LPG
      p-diesel     Premium Diesel
      p-95         Premium Benzine
      gas          Aardgas
      bio          Biodiesel

    Examples
      $ pomp 1234AB
      # Euro 95 (default)

      $ pomp 1234AB -t diesel
      # Diesel (B7)
  `;
  console.log(help.trim());
  process.exit(0);
}

async function fetchData(postcode, fuelType) {
  try {
    const url = `https://www.independer.nl/api/autoverzekering/gasstation/getgasstations?v=61&addressInformation=${encodeURIComponent(postcode)}&fuelType=${fuelType}&range=5&sorting=1`;
    const res = await fetch(url);

    if (!res.ok) {
      throw new Error(`HTTP ${res.status} ${res.statusText}`);
    }

    return await res.json();
  } catch (err) {
    const message = err instanceof Error ? err.message : String(err);
    console.error(`Error: ${message}${c.reset}`);
    process.exit(1);
  }
}

const args = process.argv.slice(2);
if (args.includes("--help") || args.includes("-h")) {
  showHelp();
}

const postcode = args.find((arg) => !arg.startsWith("-"));
const typeIdx = args.findIndex((arg) => arg === "--type" || arg === "-t");
const typeArg = typeIdx !== -1 ? args[typeIdx + 1] : null;
const fuelInput = (typeArg || args[1] || "95").toLowerCase();
const fuel = fuelByAlias[fuelInput] ?? fuels.find((f) => f.id === fuelInput);
const fuelType = fuel?.id ?? fuelInput;
const fuelName = fuel?.name ?? fuelInput;

if (!postcode) {
  showHelp();
}

console.log(
  `${c.dim}Looking up ${c.reset}${c.yellow}${fuelName}${c.reset}${c.dim} for ${c.reset}${c.yellow}${postcode}${c.reset}${c.dim}…${c.reset}`,
);

const data = await fetchData(postcode, fuelType);

const stations = data.gasStations ?? [];
if (stations.length === 0) {
  console.log(`${c.yellow}No gas stations found.${c.reset}`);
  process.exit(0);
}

const nameW = 28;
const priceW = 9;
const distW = 7;
const padR = (s, n) => String(s).padStart(n);
const padL = (s, n) => String(s).padEnd(n);

console.log(
  `\n  ${c.bold}${padR("#", 3)}  ${padL("Station", nameW)}  ${padR("Price", priceW)}  ${padR("Dist", distW)}  Address${c.reset}`,
);
console.log(
  `  ${c.dim}${"─".repeat(3)}  ${"─".repeat(nameW)}  ${"─".repeat(priceW)}  ${"─".repeat(distW)}  ${"─".repeat(36)}${c.reset}`,
);

stations.forEach((s, i) => {
  const addr = s.location.address;
  const shortAddr = `${addr.streetName} ${addr.houseNumber}, ${addr.city}`;
  const price = `€${s.fuel.fuelPrice.toFixed(3)}`;
  const dist = `${s.distance.toFixed(1)} km`;
  const name = (s.name || "").slice(0, nameW);
  const rank = i + 1;
  const rankStr =
    rank === 1
      ? `${c.green}${padR(rank, 3)}${c.reset}`
      : `${c.dim}${padR(rank, 3)}${c.reset}`;
  const pricePadded = padR(price, priceW);
  const priceStr =
    rank === 1 ? `${c.green}${pricePadded}${c.reset}` : pricePadded;
  console.log(
    `  ${rankStr}  ${c.yellow}${padL(name, nameW)}${c.reset}  ${priceStr}  ${c.dim}${padR(dist, distW)}${c.reset}  ${c.dim}${shortAddr}${c.reset}`,
  );
});