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import re
from dataclasses import dataclass
from typing import Generator, List
from aoc import BaseAssignment
hgt_matcher = re.compile('(?P<value>\d+)(?P<unit>(in|cm))')
valid_units = {
'cm': {'min': 150, 'max': 193},
'in': {'min': 59, 'max': 76}
}
hcl_matcher = re.compile('#[0-9a-f]{6}')
@dataclass
class Passport:
byr: int = None
iyr: int = None
eyr: int = None
hgt: str = None
hcl: str = None
ecl: str = None
pid: str = None
cid: str = None
def __post_init__(self):
self.byr = self.byr and int(self.byr)
self.iyr = self.iyr and int(self.iyr)
self.eyr = self.eyr and int(self.eyr)
class Assignment(BaseAssignment):
def create_passport(self, items: List[List]) -> Passport:
return Passport(**dict(items))
def read_input(self, example=False) -> Generator:
passport = []
for item in super().read_input(example):
if item == '':
yield self.create_passport(passport)
passport = []
continue
for field in item.split(' '):
passport.append(field.split(':'))
yield self.create_passport(passport)
def valid_passport(self, passport: Passport):
raise NotImplementedError('Please implement valid_passport')
def run(self, input: Generator):
valid_passports = 0
for passport in input:
if self.valid_passport(passport):
valid_passports += 1
return valid_passports
class AssignmentOne(Assignment):
def valid_passport(self, passport: Passport) -> bool:
return all([
val
for key, val in vars(passport).items()
if key != 'cid'
])
class AssignmentTwo(Assignment):
def valid_byr(self, byr: int):
return byr and 1920 <= byr <= 2002
def valid_iyr(self, iyr: int):
return iyr and 2010 <= iyr <= 2020
def valid_eyr(self, eyr: int):
return eyr and 2020 <= eyr <= 2030
def valid_hgt(self, hgt: str):
try:
match = hgt_matcher.match(hgt).groupdict()
unit = valid_units[match['unit']]
return unit['min'] <= int(match['value']) <= unit['max']
except (TypeError, AttributeError):
return False
def valid_hcl(self, hcl: str):
return hcl and hcl_matcher.match(hcl)
def valid_ecl(self, ecl: str):
return ecl and ecl in (
'amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth'
)
def valid_pid(self, pid: str):
return pid and len(pid) == 9
def valid_passport(self, passport: Passport):
return self.valid_byr(passport.byr) \
and self.valid_iyr(passport.iyr) \
and self.valid_eyr(passport.eyr) \
and self.valid_hgt(passport.hgt) \
and self.valid_hcl(passport.hcl) \
and self.valid_ecl(passport.ecl) \
and self.valid_pid(passport.pid)
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