advent of code day 4 part 2

day4_part2.js

const fs = require('fs')
const splitted = fs.readFileSync('./input.txt', 'utf-8').split(String.fromCharCode(0x0a).repeat(2))

function normalize(splt) {
	let tmp = Object.create({})

	for (let i = 0; i < splt.length; i++) {
		splt[i].split(/\s+/).forEach((el) => {
			let _splt = el.split(':');
			tmp[_splt[0]] = _splt[1]
		})

		splt[i] = tmp
		tmp = Object.create({})
	}

	return splt
}

function validate(ps) {
	let result = false

	result = ps.byr === undefined
		? false
		: (/^[0-9]+$/.test(ps.byr) && (Number.parseInt(ps.byr) >= 1920) && (Number.parseInt(ps.byr) <= 2002)
			? true
			: false)

	if (!result) {
		return false
	}

	result = ps.iyr === undefined
		? false
		: (/^[0-9]+$/.test(ps.iyr) && (Number.parseInt(ps.iyr) >= 2010) && (Number.parseInt(ps.iyr) <= 2020)
			? true
			: false)

	if (!result) {
		return false
	}

	result = ps.eyr === undefined
		? false
		: (/^[0-9]+$/.test(ps.eyr) && (Number.parseInt(ps.eyr) >= 2020) && (Number.parseInt(ps.eyr) <= 2030)
			? true
			: false)

	if (!result) {
		return false
	}

	result = ps.hgt === undefined
		? false
		: (!((x) => {
			if (!/^(?:[0-9]+(?:cm|in))$/.test(x)) {
				return false
			}

			let size = x.slice(0, x.length - 2)
			let measurement = x.slice(x.length - 2)

			if ((measurement === 'cm' && (Number.parseInt(size) >= 150) && (Number.parseInt(size) <= 193)) ||
			    (measurement === 'in' && (Number.parseInt(size) >= 59)  && (Number.parseInt(size) <= 76))) {
				return true
			}

			return false
		})(ps.hgt) ? false : true)

	if (!result) {
		return false
	}

	result = ps.hcl === undefined
		? false
		: /^(?:\#[0-9a-f]{6})$/.test(ps.hcl)

	if (!result) {
		return false
	}

	result = ps.ecl === undefined
		? false
		: /^(?:amb|blu|brn|gry|grn|hzl|oth)$/.test(ps.ecl)

	if (!result) {
		return false
	}

	result = ps.pid === undefined
		? false
		: /^[0-9]{9}$/.test(ps.pid)

	if (!result) {
		return false
	}

	return result
}

function solve(splt) {
	let numValid = 0
	let valid = true

	splt.forEach((el) => {
		valid = validate(el)

		if (valid) {
			numValid++
		}
	})

	return numValid
}

console.log(solve(normalize(splitted)))