255 lines
7.8 KiB
Python
Executable File
255 lines
7.8 KiB
Python
Executable File
#!/usr/bin/env pypy3
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from scraper import AdventSession
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from getpass import getpass
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import importlib
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import os
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import re
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import pathlib
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import traceback
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from argparse import ArgumentParser
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YEAR = 2019
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PATH = pathlib.Path(__file__).parent
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INPUT_PATH = PATH / 'input'
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class Tests(list):
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"""
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Test cases class. A test case is a tuple of the form
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(puzzle_input, partI_result, partII_result).
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"""
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def add(self, test_input, partI=None, partII=None):
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"""Add a test case"""
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self.append((str(test_input), partI, partII))
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def testf(tests, f, part):
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"""
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Tests a function f on test cases tests and compares the result
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to test_case[part]. The test is not run if test_case[part] == None.
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"""
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tests = [(t[0], t[part]) for t in tests if t[part] != None]
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if tests == []:
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return "No tests"
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for i, (case, sol) in enumerate(tests):
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if sol == None:
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continue
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r = f(case)
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if r == sol:
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continue
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return "Failed on test {}. Expected {}. Got {}".format(i+1, sol, r)
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return "OK"
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class Solver:
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"""
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Solver class. A solver is a module with functions partI and partII,
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an optional preprocessing function preproc, and an optional variable
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tests of type Tests.
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"""
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def __init__(self, mod):
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"""Initilizes the solver instance of module mod."""
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def unpack(name, default):
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"""Returns mod.name if it exists and default otherwise."""
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return getattr(mod, name) if name in dir(mod) else default
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dn_pattern = re.compile("\d\d?")
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self.preproc = unpack('preproc', NotImplemented)
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self.tests = unpack('tests', [])
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self.partI = getattr(mod, 'partI')
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self.partII = getattr(mod, 'partII')
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def solve(self, puzzle_input):
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"""Solves puzzle input and returns pair of solutions"""
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puzzle_input = puzzle_input.rstrip()
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if self.preproc != NotImplemented:
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puzzle_input = self.preproc(puzzle_input)
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ptI = self.partI(puzzle_input)
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ptII = self.partII(puzzle_input)
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return ptI, ptII
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def test(self):
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"""Tests the solver and returns pair of test results."""
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tests = self.tests
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if self.preproc != NotImplemented:
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tests = [(self.preproc(str(t)), s1, s2)
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for (t, s1, s2) in tests]
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ptI = testf(tests, self.partI, 1)
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ptII = testf(tests, self.partII, 2)
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return ptI, ptII
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return r
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parser = ArgumentParser()
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parser.description = \
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"""Solves Advent of Code 2019 puzzles.
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The puzzles are available at https://adventofcode.com/2019/"""
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parser.add_argument('-d', '--day',
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action='store',
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type=str,
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metavar='DAY[-DAY]',
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help='solve puzzle of day DAY or of range DAY-DAY')
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group = parser.add_mutually_exclusive_group()
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group.add_argument('-i', '--input',
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action='store',
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type=str,
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metavar='INPUT',
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default=INPUT_PATH,
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help='use INPUT as puzzle input')
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group.add_argument('-t', '--test',
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action='store_true',
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help="run tests")
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group.add_argument('--fetch-session',
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action='store_true',
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help='fetch puzzle inputs and solutions for session key')
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def parse_day_arg(s, mind, maxd):
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"""Parses day argument. Returns a list of days."""
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split = s.split('-')
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if len(split) == 1:
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return [int(split[0])]
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elif len(split) == 2:
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d, D = map(int, split)
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return list(range(max(1, d), min(D+1, 26)))
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raise ValueError
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def main():
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solver_pattern = re.compile("day(\d\d?).py")
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matches = map(solver_pattern.fullmatch, os.listdir(PATH))
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solvers = {int(s.group(1)) : s.group(0) for s in matches if s != None}
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mind, maxd = min(solvers), max(solvers)
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days = sorted(solvers.keys())
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args = parser.parse_args()
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#Handle day argument
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if args.day != None:
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try:
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days = parse_day_arg(args.day, mind, maxd)
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except ValueError:
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return 'invalid format of argument -d/--day'
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#Handle input argument
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inputs = {}
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input_path = pathlib.Path('.')
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num_pattern = re.compile(r'\d\d?')
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try:
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fs = os.listdir(args.input)
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input_path /= args.input
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for fn in fs:
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ns = num_pattern.findall(fn)
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if ns == []:
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print('warning : ignoring input file {}'.format(fn))
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continue
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n = int(ns[0])
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inputs[n] = fn
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except FileNotFoundError:
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return "input directory or file doesn't exist"
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except NotADirectoryError:
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if len(days) > 1:
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return "input is file"
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day = days[0]
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inputs[day] = args.input
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#Fetch inputs of session
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if args.fetch_session:
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answer = input('Fetch puzzle input and solutions for session key?\n' +
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'The session key will not be stored. [Y/n]: ')
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if 'n' in answer.lower():
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return
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key = getpass('Session key: ')
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sess = AdventSession(key)
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anon_pattern = re.compile(r'\(anonymous user #(\d+)\)')
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user = sess.get_user()
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print('Fetching inputs for {}'.format(user))
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anon_match = anon_pattern.fullmatch(user)
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if anon_match == None:
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dir_name = 'user_{}'.format(user.replace(' ', '-'))
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else:
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dir_name = 'anon_{}'.format(anon_match.group(1))
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if not os.path.exists(dir_name):
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os.makedirs(dir_name)
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mssg = 'Choose directory name or press ENTER for [{}]: '.format(dir_name)
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r = input(mssg)
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if r != '':
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dir_name = r
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path = PATH / pathlib.Path(dir_name)
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sol_fn = 'solutions'
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#Create / overwrite solution file
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open(path / sol_fn, 'a').close()
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with open(path / sol_fn, 'w') as f:
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f.write('')
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input_format = 'day{0:0>2}.txt'
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for d in days:
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print('[{}{}] {}/25'.format('#'*d, '.'*(25-d), d), end='\r')
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try:
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puzzle_input = sess.get_input(YEAR, d)
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except e:
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print('warning : failed to fetch input for day {}'.format(d))
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print(e)
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continue
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#Create file if it doesn't exist
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fn = path / input_format.format(d)
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open(fn, 'a').close()
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with open(fn, 'w') as f:
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f.write(puzzle_input)
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try:
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solutions = sess.get_solutions(YEAR, d)
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except e:
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print('warning : failed to fetch solutions for day {}'.format(d))
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print(e)
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continue
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with open(path / sol_fn, 'a') as f:
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f.write(' '.join(solutions) + '\n')
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print('\nDone')
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return
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#Solve days
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for d in days:
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print("=" * 6 + " Day {} ".format(d) + "=" * 6)
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if d not in solvers:
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return "no solver for day {}".format(d)
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mod_name = solvers[d][:-3]
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try:
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mod = importlib.import_module(mod_name)
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solver = Solver(mod)
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except:
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return "bad solver\n\n{}".format(traceback.format_exc())
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try:
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if args.test:
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ptI, ptII = solver.test()
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else:
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if d not in inputs:
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return 'no input file'
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with open(input_path / inputs[d]) as f:
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puzzle_input = f.read()
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ptI, ptII = solver.solve(puzzle_input)
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print("Part One : {}".format(ptI))
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print("Part Two : {}".format(ptII))
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except:
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return "error in solver\n\n{}".format(traceback.format_exc())
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if __name__ == '__main__':
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error = main()
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if error != None:
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print('error : {}'.format(error))
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