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# Day Four: Passport Processing
import os, strutils
let input: string = paramStr(1)
var fieldedPassports, validPassports: int = 0
for passport in split(readFile(input), "\n\n"):
var fields, valid: int = 0
for pairs in split(strip(replace(passport, "\n", " ")), " "):
let
key: string = split(pairs, ":")[0]
value: string = split(pairs, ":")[1]
case key
of "byr":
if parseInt(value) >= 1920 and parseInt(value) <= 2002:
inc(valid)
inc(fields)
of "iyr":
if parseInt(value) >= 2010 and parseInt(value) <= 2020:
inc(valid)
inc(fields)
of "eyr":
if parseInt(value) >= 2020 and parseInt(value) <= 2030:
inc(valid)
inc(fields)
of "hgt":
let
units: string = value[len(value)-2..len(value)-1]
height: string = value[0..len(value)-3]
if units == "cm" and parseInt(height) >= 150 and parseInt(height) <= 193:
inc(valid)
elif units == "in" and parseInt(height) >= 59 and parseInt(height) <= 76:
inc(valid)
inc(fields)
of "hcl":
block hex:
if value[0] == '#':
for char in value[1..len(value)-1]:
if char notin {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}:
break hex
inc(valid)
inc(fields)
of "ecl":
if value in ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]:
inc(valid)
inc(fields)
of "pid":
if len(value) == 9:
inc(valid)
inc(fields)
if fields >= 7:
inc(fieldedPassports)
if valid >= 7:
inc(validPassports)
echo fieldedPassports
echo validPassports
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