Fetch samples feature + message submit bug fix

codeforces_scraper/models.py

@@ -232,3 +232,8 @@ class RanklistRow(APIModel):
     unsuccessful_hack_count: int
     problem_result: List[ProblemResult]
     last_submission_time_seconds: int
+
+
+class Sample(BaseModel):
+    s_in: str
+    s_out: str

codeforces_scraper/scraper.py

@@ -3,8 +3,8 @@ import requests
 from requests import Session
 from bs4 import BeautifulSoup as bs
 
-from codeforces_scraper.utils import get_token, get_messages, create_jar
-from codeforces_scraper.models import Submission, Problem
+from codeforces_scraper.utils import get_token, get_messages, create_jar, unfuck_multitest_sample
+from codeforces_scraper.models import Submission, Problem, Sample
 from typing import List
 
 
@@ -62,7 +62,7 @@ class Scraper:
                 if self.current_user is not None:
                     raise ScraperError('Failed to logout!')
                 return
-    
+
     def get_csrf_token(self):
         """Get csrf token, which is needed
         to make requests by hand
@@ -114,8 +114,10 @@ class Scraper:
             raise ScraperError('Submitting while not logged in')
         url = f'contest/{contest_id}/submit'
         submit_page_response = self.get(url)
-        for message in get_messages(submit_page_response):
-            raise MessagedScrapError(message)
+        # FIXME: Now some pornography is in the messages, which is not displayed and
+        # is not an error
+        # for message in get_messages(submit_page_response):
+        #     raise MessagedScrapError(message)
         token = get_token(submit_page_response)
         payload = {
             'csrf_token': token,
@@ -177,6 +179,16 @@ class Scraper:
         }
         return self.api_request('contest.standings', params)['problems']
 
+    def get_samples(self, contest_id: int, problem_index: str) -> List[Sample]:
+        url = f'contest/{contest_id}/problem/{problem_index}'
+        page_response = self.get(url)
+        soup = bs(page_response.text, 'lxml')
+        samples = soup.find(attrs={'class': 'sample-tests'}).find(attrs={'class': 'sample-test'})
+        inputs = [unfuck_multitest_sample(str(div_input.find(name='pre')))
+                  for div_input in samples.find_all(attrs={'class': 'input'})]
+        outputs = [div_output.find(name='pre').get_text() for div_output in samples.find_all(attrs={'class', 'output'})]
+        return [Sample(s_in=s_in, s_out=s_out) for (s_in, s_out) in zip(inputs, outputs)]
+
     def get(self, sub_url='', **kwargs):
         """Make a GET request to BASE_URL"""
         url = self.base_url + '/' + sub_url

codeforces_scraper/utils.py

@@ -8,6 +8,15 @@ MESSAGE_GREP_STRING = r'Codeforces\.showMessage\('
 # TODO: Grep for Codeforces.showMessage(" to find message, that has been sent
 
 
+def unfuck_multitest_sample(sample_input: str) -> str:
+    div_class_regex = '<div class="[a-zA-Z0-9- ]*">'
+    sample_input = re.sub(div_class_regex, '', sample_input)
+    sample_input = re.sub('</div>', '\n', sample_input)
+    sample_input = re.sub('<pre>', '', sample_input)
+    sample_input = re.sub('</pre>', '', sample_input)
+    return sample_input
+
+
 def create_jar(str_cookie: str):
     cookies = str_cookie.split(';')
     d = {}
@@ -27,6 +36,7 @@ def get_token(response: Response) -> str:
     return token
 
 
+# FIXME: More robust way to find messages
 def get_messages(response: Response) -> List[str]:
     text = response.text
     return re.findall(fr'{MESSAGE_GREP_STRING}\"(.+?)\"', text)

setup.py

@@ -2,7 +2,7 @@ import setuptools
 
 setuptools.setup(
         name='codeforces-scraper',
-        version='0.3.0',
+        version='0.3.1',
         author='thematdev',
         author_email='thematdev@thematdev.org',
         description='Utility to do actions on codeforces',