90 lines
2.4 KiB
JavaScript
90 lines
2.4 KiB
JavaScript
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import fs from "fs";
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/** @type {Record<string, RegExp>}} */
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const REQUIRED_FIELDS = {
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byr: /^\d{4}$/, // (Birth Year)
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iyr: /^\d{4}$/, // (Issue Year)
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eyr: /^\d{4}$/, // (Expiration Year)
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hgt: /^\d{2}(?:in|\dcm)$/, // (Height)
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hcl: /^#[0-9a-f]{6}$/, // (Hair Color)
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ecl: /^(?:amb|blu|brn|gry|grn|hzl|oth)$/, // (Eye Color)
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pid: /^\d{9}$/, // (Passport ID)
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// IGNORED // cid: /^.*$/, // (Country ID)
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};
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/**
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* Main function for Puzzle A
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*
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* @param {string} data - Puzzle input as a single string.
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*/
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async function main(data) {
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const entries = data.split(/(?:\r?\n){2}/).map((raw) => raw.split(/\s+/g));
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/** @type {Record<string, string|number>[]} */
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let passports = [];
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for (const raw of entries) {
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let passport = {};
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raw
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.map((rawKV) => rawKV.split(":"))
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.forEach(([key, value]) => {
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passport[key] = value;
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});
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if ([7, 8].includes(Object.keys(passport).length)) passports.push(passport);
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}
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let once = true;
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/** @type {Record<string, string|number>[]} */
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const valid_passports = [];
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for (const passport of passports) {
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let valid = true;
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for (const required in REQUIRED_FIELDS) {
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if (!valid) break;
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if (
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!passport.hasOwnProperty(required) ||
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!REQUIRED_FIELDS[required].test(passport[required])
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) {
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valid = false;
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console.log(required)
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break;
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}
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switch (required) {
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case "byr":
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const byr = parseInt(passport[required]);
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if (1920 > byr || byr > 2002) valid = false;
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break;
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case "iyr":
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const iyr = parseInt(passport[required]);
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if (2010 > iyr || iyr > 2020) valid = false;
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break;
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case "eyr":
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const eyr = parseInt(passport[required]);
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if (2020 > eyr || eyr > 2030) valid = false;
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break;
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case "hgt":
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const hgt = parseInt(passport[required]);
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const unit = passport[required].substr(hgt.toString().length);
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switch (unit) {
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case "cm":
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if (hgt > 193 || hgt < 150) valid = false;
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break;
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case "in":
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if (hgt > 76 || hgt < 59) valid = false;
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break;
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}
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break;
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}
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}
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if (valid) {
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valid_passports.push(passport);
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}
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}
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return valid_passports.length;
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}
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fs.readFile("input", (err, data) => {
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if (err) throw err;
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main(data.toString()).then(console.log).catch(console.error);
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});
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