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hr_offline.py
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#! /usr/bin/env python3
# télécharge les contests, domains et challenges de HackerRank
# crée une image locale permettant la résolution offline ainsi que la création des tables d'index
import json
import os
import requests
from hrinit import HackerRankParser
import argparse
import requests_cache
import sys
import logging
import datetime
def get_path(m):
# le modèle d'un chellenge de contest
# - contest (ex: projecteuler)
# - slug (ex: euler001)
# et seront stockés avec comme aroborescence <contest>/<slug>.<extenion>
# le modèle d'un challenge de practice
# - contest: master
# - slug: clé
# - track: domaine/sous-domaine (ex: algorithms/warmup)
# et a parfois
# - primary_contest: contest d'origine
if 'track' not in m or m['track'] is None:
path = os.path.join("models", m["contest_slug"])
else:
path = os.path.join("models",
m["contest_slug"], m["track"]["track_slug"], m["track"]["slug"])
return path
class hackerrank:
def __init__(self, download_challenges=False, reload_catalogs=False):
self.session = requests.Session()
self.download_challenges = download_challenges
self.reload_catalogs = reload_catalogs
self.copy_testcases = False
def set_copy_testcases(self):
self.copy_testcases = True
self.download_challenges = True
#####
def retrieve(self, contest, challenge, filename):
if os.path.exists(filename):
with open(filename, "rb") as f:
# print("----> ", challenge, filename)
return f.read()
url = "https://www.hackerrank.com/rest/contests/{}/challenges/{}".format(contest, challenge)
with requests_cache.disabled():
r = self.session.get(url)
if r.status_code == 200:
with open(filename, "wb") as f:
f.write(r.content)
return r.content
######
def mirror(self, models):
""" mirror challenges listed into models """
for m in models:
# kind: code database
# if m.get('kind') != 'code':
# print(m.get('kind'))
# continue
# si manquant: video (cf. cracking the code interview)
if 'kind' not in m:
print("missing kind", m)
continue
m["contest_slug"] # master
m["slug"] # solve-me-first
m["name"] # Solve Me First
m["preview"] # This is an easy challenge ...
if 'track' in m:
if m['track']:
m["track"]["track_slug"] # algorithms
m["track"]["track_name"] # Algorithms
m["track"]["slug"] # warmup
m["track"]["name"] # Warmup
if 'track' in m and m["track"]:
print("=======> ", m["track"]["track_name"], ">", m["track"]["name"], ">", m["name"])
else:
print("=======> ", m["name"])
if not self.download_challenges:
continue
path = get_path(m)
os.makedirs(path, exist_ok=True)
data = self.retrieve(m["contest_slug"], m["slug"], os.path.join(path, m["slug"] + ".json"))
if data is None:
print("NOT AVAILABLE", m["slug"], m["contest_slug"])
continue
hr = HackerRankParser(rootdir=".")
hr.feed(data, True)
testcases_file, _ = hr.downloads(statement=True, testcases=True)
if self.copy_testcases:
dest = os.path.join(os.path.dirname(__file__), testcases_file)
if os.path.exists(testcases_file) and not os.path.exists(dest):
print("link", dest)
os.link(testcases_file, dest)
def get(self, url, unused):
print(">", url)
return self.session.get(url).json()
# def get(self, url, cache_file):
# cache_file = os.path.join('cache', cache_file)
# os.makedirs(os.path.dirname(cache_file), exist_ok=True)
# if not self.reload_catalogs and os.path.exists(cache_file):
# with open(cache_file, "rb") as f:
# return json.loads(f.read())
# else:
# print(">", url)
# r = self.session.get(url)
# if r.status_code == 200:
# with open(cache_file, "wb") as f:
# f.write(r.content)
# return json.loads(r.content)
# else:
# print("error", r, url)
def get_tracks(self, contest, my_caterogies=None):
url = 'https://www.hackerrank.com/rest/contests/{}/tracks'.format(contest)
fn = '{}_tracks.json'.format(contest)
tracks = self.get(url, fn)
for track in tracks['models']:
if my_caterogies is not None and track['slug'] not in my_caterogies:
continue
url = 'https://www.hackerrank.com/rest/contests/{}/tracks/{}/chapters'.format(contest, track['slug']) # noqa
fn = '{}_{}.json'.format(contest, track['slug'])
data = self.get(url, fn)
chapters = data['models']
track = {"models": [],
"id": track['id'],
"slug": track['slug'],
"name": track['name'],
"description": track['descriptions']}
for chapter in chapters:
data = self.get_chapter(contest, track['slug'], chapter)
track["models"].extend(data)
os.makedirs("contests", exist_ok=True)
filename = os.path.join("contests", "{}_{}.json".format(contest, track['slug']))
with open(filename, "wt") as f:
json.dump(track, f)
self.mirror(track["models"])
def get_chapter(self, contest, track, chapter):
slug = chapter['slug'] # warmup
# name = chapter['name'] # Warmup
count = int(chapter['challenges_count']) # 10
models = []
limit = 50
for i in range(0, count, limit):
url = "https://www.hackerrank.com/rest/contests/{}/categories/{}%7C{}/challenges?offset={}&limit={}".format(contest, track, slug, i, limit) # noqa
fn = '{}_{}_{}_{:03d}.json'.format(contest, track, slug, i)
data = self.get(url, fn)
models.extend(data['models'])
return models
def get_contest(self, contest):
url = 'https://www.hackerrank.com/rest/contests/' + contest
fn = contest + '.json'
data = self.get(url, fn)
model = data['model']
count = model['challenges_count'] # 210
if count is None:
return
models = []
limit = 50
for offset in range(0, count, limit):
url = "https://www.hackerrank.com/rest/contests/{}/challenges?offset={}&limit={}".format(contest, offset, limit) # noqa
fn = '{}_{:03d}.json'.format(contest, offset)
data = self.get(url, fn)
models.extend(data['models'])
track = {"models": models,
"id": model['id'],
"slug": model['slug'],
"name": model['name'],
"description": model['description']}
os.makedirs("contests", exist_ok=True)
with open(os.path.join("contests", "{}.json".format(contest)), "wt") as f:
json.dump(track, f)
print("====>", contest)
self.mirror(models)
def all_contests(self):
archived = self.get("https://www.hackerrank.com/rest/contests/archived?offset=0&limit=500&contest_slug=active", "contests_archived.json") # noqa
upcoming = self.get("https://www.hackerrank.com/rest/contests/upcoming", "contests_upcoming.json") # noqa
contests = set()
for c in upcoming['models']:
slug = c['slug']
contests.add(slug)
self.get_contest(slug)
for c in archived['models']:
slug = c['slug']
if slug not in contests:
contests.add(slug)
self.get_contest(slug)
def all_tracks(self):
tracks = self.get("https://www.hackerrank.com/rest/contests/master/tracks", "master_tracks.json") # noqa
t = list(t['slug'] for t in tracks['models'])
self.get_tracks("master", t)
def tutorial(self, filename):
with open(filename, "rt") as f:
data = json.load(f)
fn = None
for m in data['models']:
if 'contest_slug' in m and 'track' in m:
fn = os.path.join("contests", '{}_tutorials_{}.json'.format(m['contest_slug'], m['track']['slug'])) # noqa
break
if fn is None:
print("Bad file:", filename)
if os.path.exists(fn):
os.unlink(fn)
os.link(filename, fn)
self.mirror(data['models'])
def interview(self):
models = []
stack = ['interview-preparation-kit']
while len(stack) > 0:
s = stack.pop()
data = self.get('https://www.hackerrank.com/rest/playlists/{}'.format(s), 'playlist_{}.json'.format(s)) # noqa
for playlist in data['playlists']:
stack.append(playlist['slug'])
if data['challenges_count'] > 0:
d = self.get('https://www.hackerrank.com/rest/playlists/{}/challenges'.format(s), 'playlist_{}_challenges.json'.format(s)) # noqa
print("Interview:", d['name'])
self.mirror(d['challenges'])
x = d['challenges']
x.extend(models)
models = x
track = {"models": models,
"id": 0,
"slug": 'interview-preparation-kit',
"name": 'interview-preparation-kit',
"description": 'interview-preparation-kit'}
filename = os.path.join("contests", "interview-preparation-kit.json")
with open(filename, "wt") as f:
json.dump(track, f)
def set_logging(verbose):
""" set up a colorized logger """
if sys.stdout.isatty():
logging.addLevelName(logging.DEBUG, "\033[0;32m%s\033[0m" % logging.getLevelName(logging.DEBUG))
logging.addLevelName(logging.INFO, "\033[1;33m%s\033[0m" % logging.getLevelName(logging.INFO))
logging.addLevelName(logging.WARNING, "\033[1;35m%s\033[1;0m" % logging.getLevelName(logging.WARNING))
logging.addLevelName(logging.ERROR, "\033[1;41m%s\033[1;0m" % logging.getLevelName(logging.ERROR))
if verbose:
logging.basicConfig(format='%(asctime)s:%(levelname)s:%(message)s', level=logging.DEBUG, datefmt='%H:%M:%S')
else:
logging.basicConfig(format='%(asctime)s:%(levelname)s:%(message)s', level=logging.ERROR, datefmt='%H:%M:%S')
def set_cache(refresh=False):
""" install the static Requests cache """
if refresh:
expire_after = datetime.timedelta(seconds=0)
else:
expire_after = datetime.timedelta(days=30)
requests_cache.install_cache(
cache_name=os.path.join(os.path.dirname(__file__), "cache"),
allowable_methods=('GET', 'POST'), expire_after=expire_after)
requests_cache.core.remove_expired_responses()
def offline():
parser = argparse.ArgumentParser(description='Offliner')
parser.add_argument("-v", "--verbose", help="increase verbosity", action='store_true')
parser.add_argument('--contests', help="download all contests", action='store_true')
parser.add_argument('--tracks', help="download all tracks", action='store_true')
parser.add_argument('-c', '--contest', help="download contest")
parser.add_argument('-t', '--track', nargs='*', help="download a master track")
parser.add_argument('-m', '--mirror', help="mirror challenges", action='store_true')
parser.add_argument('-R', '--refresh', help="refresh the catalogs (do not use cache)",
action='store_true')
parser.add_argument('--tutorials', help="download tutorials", action='store_true')
parser.add_argument('--interview', help="download interview-preparation-kit",
action='store_true')
parser.add_argument('--copy-testcases', help="copy testcases for archive", action='store_true')
args = parser.parse_args()
set_logging(args.verbose)
set_cache(args.refresh)
x = hackerrank(args.mirror, args.refresh)
if args.copy_testcases:
x.set_copy_testcases()
if args.contests:
x.all_contests()
if args.tracks:
x.all_tracks()
if args.contest:
x.get_contest(args.contest)
if args.track:
x.get_tracks("master", args.track)
if args.tutorials:
x.tutorial("tutorials/cracking-the-coding-interview.json")
x.tutorial("tutorials/30-days-of-code.json")
x.tutorial("tutorials/10-days-of-javascript.json")
x.tutorial("tutorials/10-days-of-statistics.json")
if args.interview:
x.interview()
if False:
x.get_tracks("master", ["algorithms", "data-structures", "mathematics",
"cpp", "python", "shell", "sql", "security",
"fp"])
x.get_contest("projecteuler")
x.get_tracks("master", ["databases", "general-programming", "ai", "regex"])
# x.get_contest("infinitum10")
# x.get_contest("infinitum18")
# x.get_contest("openbracket-2017")
if __name__ == '__main__':
__file__ = os.path.abspath(__file__)
os.chdir(os.path.join(os.path.dirname(__file__), "offline"))
offline()