234 lines
7.3 KiB
Python
234 lines
7.3 KiB
Python
import asyncio
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import os
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import os.path
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from typing import List
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import aiohttp
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from bs4 import BeautifulSoup, SoupStrainer, Tag
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from lingua import LanguageDetector
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from app.locale import Locale, native_to_locale
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from app.pipeline import Extractor as BaseExtractor
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from app.pipeline import Fetcher as BaseFetcher
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from app.pipeline import Pipeline as BasePipeline
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from app.types import Site, Title
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# The number of pages we will at most iterate through. This number was
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# determined by going to https://lichess.org/coach/all/all/alphabetical
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# and traversing to the last page.
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MAX_PAGES = 162
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# How long to wait between each network request.
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SLEEP_SECS = 5
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class Fetcher(BaseFetcher):
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def __init__(self, session: aiohttp.ClientSession):
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super().__init__(site=Site.LICHESS, session=session)
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async def scrape_usernames(self, page_no: int) -> List[str] | None:
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if page_no > MAX_PAGES:
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return []
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print(f"{self.site.value}: Scraping page {page_no}/{MAX_PAGES}")
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filepath = self.path_page_file(page_no)
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try:
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with open(filepath, "r") as f:
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return [line.strip() for line in f.readlines()]
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except FileNotFoundError:
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pass
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if self.has_made_request:
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await asyncio.sleep(SLEEP_SECS)
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url = f"https://lichess.org/coach/all/all/alphabetical?page={page_no}"
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response, status_code = await self.fetch(url)
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if response is None:
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return None # Skips this page.
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usernames = []
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soup = BeautifulSoup(response, "lxml")
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members = soup.find_all("article", class_="coach-widget")
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for member in members:
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a = member.find("a", class_="overlay")
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if a:
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href = a.get("href")
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username = href[len("/coach/") :]
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usernames.append(username)
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with open(filepath, "w") as f:
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for username in usernames:
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f.write(f"{username}\n")
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return usernames
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async def download_user_files(self, username: str) -> None:
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maybe_download = [
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(
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f"https://lichess.org/coach/{username}",
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self.path_coach_file(username, f"{username}.html"),
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),
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(
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f"https://lichess.org/@/{username}",
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self.path_coach_file(username, "stats.html"),
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),
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]
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to_download = []
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for d_url, d_filename in maybe_download:
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if os.path.isfile(d_filename):
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continue
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to_download.append((d_url, d_filename))
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if not to_download:
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return
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if self.has_made_request:
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await asyncio.sleep(SLEEP_SECS)
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await asyncio.gather(
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*[self._download_file(url=d[0], filename=d[1]) for d in to_download]
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)
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async def _download_file(self, url: str, filename: str) -> None:
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response, _unused_status = await self.fetch(url)
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if response is not None:
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with open(filename, "w") as f:
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f.write(response)
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def _profile_filter(elem: Tag | str | None, attrs={}) -> bool:
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if "coach-widget" in attrs.get("class", ""):
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return True
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return False
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def _stats_filter(elem: Tag | str | None, attrs={}) -> bool:
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if "user-link" in attrs.get("class", ""):
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return True
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if "profile-side" in attrs.get("class", ""):
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return True
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if "sub-ratings" in attrs.get("class", ""):
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return True
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return False
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class Extractor(BaseExtractor):
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def __init__(self, fetcher: BaseFetcher, detector: LanguageDetector, username: str):
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super().__init__(fetcher, detector, username)
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self.profile_soup = None
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try:
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filename = self.fetcher.path_coach_file(username, f"{username}.html")
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with open(filename, "r") as f:
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self.profile_soup = BeautifulSoup(
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f.read(), "lxml", parse_only=SoupStrainer(_profile_filter)
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)
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except FileNotFoundError:
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pass
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self.stats_soup = None
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try:
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filename = self.fetcher.path_coach_file(username, "stats.html")
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with open(filename, "r") as f:
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self.stats_soup = BeautifulSoup(
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f.read(), "lxml", parse_only=SoupStrainer(_stats_filter)
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)
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except FileNotFoundError:
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pass
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def get_name(self) -> str | None:
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if self.stats_soup is None:
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return None
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profile_side = self.stats_soup.find("div", class_="profile-side")
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if not isinstance(profile_side, Tag):
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return None
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user_infos = profile_side.find("div", class_="user-infos")
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if not isinstance(user_infos, Tag):
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return None
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name = user_infos.find("strong", class_="name")
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if not isinstance(name, Tag):
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return None
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return name.get_text().strip()
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def get_image_url(self) -> str | None:
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if self.profile_soup is None:
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return None
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picture = self.profile_soup.find("img", class_="picture")
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if not isinstance(picture, Tag):
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return None
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src = picture.get("src", "")
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if not isinstance(src, str):
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return None
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if "image.lichess1.org" not in src:
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return None
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return src
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def get_title(self) -> Title | None:
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if self.stats_soup is None:
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return None
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utitle = self.stats_soup.find("span", class_="utitle")
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if not isinstance(utitle, Tag):
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return None
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title = utitle.get_text().strip()
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try:
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return Title(title)
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except ValueError:
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return None
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def get_languages(self) -> List[Locale] | None:
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if self.profile_soup is None:
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return None
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tr = self.profile_soup.find("tr", class_="languages")
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if not isinstance(tr, Tag):
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return None
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td = tr.find("td")
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if not isinstance(td, Tag):
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return None
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codes = []
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for lang in [s.strip() for s in tr.get_text().split(",")]:
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if lang in native_to_locale:
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codes.append(native_to_locale[lang])
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return codes
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def get_rapid(self) -> int | None:
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return self._find_rating("rapid")
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def get_blitz(self) -> int | None:
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return self._find_rating("blitz")
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def get_bullet(self) -> int | None:
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return self._find_rating("bullet")
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def _find_rating(self, name) -> int | None:
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if self.stats_soup is None:
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return None
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a = self.stats_soup.find("a", href=f"/@/{self.username}/perf/{name}")
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if not isinstance(a, Tag):
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return None
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rating = a.find("rating")
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if not isinstance(rating, Tag):
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return None
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strong = rating.find("strong")
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if not isinstance(strong, Tag):
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return None
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value = strong.get_text()
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if value[-1] == "?":
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value = value[:-1]
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try:
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return int(value)
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except ValueError:
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return None
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class Pipeline(BasePipeline):
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def get_fetcher(self, session: aiohttp.ClientSession):
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return Fetcher(session)
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def get_extractor(
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self, fetcher: BaseFetcher, detector: LanguageDetector, username: str
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):
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return Extractor(fetcher, detector, username)
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