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