entries() convenience method

[paperdoorknob] / paperdoorknob.py

diff --git a/paperdoorknob.py b/paperdoorknob.py
index cd93e4ef69c24b84679432ac0a5d6435aff6e813..6cc76a2f56d465fdf0c897b601dfbaa25dd86d03 100644 (file)
--- a/paperdoorknob.py
+++ b/paperdoorknob.py
@@ -6,11 +6,45 @@
 
 
 from argparse import ArgumentParser
+import itertools
+import os.path
+
+from typing import Iterable
+
+from bs4 import BeautifulSoup
+from bs4.element import Tag
 import requests
+import requests_cache
+from xdg_base_dirs import xdg_cache_home
+
+
+class Post:
+    def __init__(self, html: BeautifulSoup) -> None:
+        self._html = html
+
+    def text(self) -> Tag:
+        body = self._html.body
+        assert body
+        text = body.find_next("div", class_="post-post")
+        assert isinstance(text, Tag)
+        return text
+
+    def replies(self) -> Iterable[Tag]:
+        replies = self._html.find_all("div", class_="post-reply")
+        assert all(isinstance(r, Tag) for r in replies)
+        return replies
+
+    def entries(self) -> Iterable[Tag]:
+        return itertools.chain([self.text()], self.replies())
 
 
 def command_line_parser() -> ArgumentParser:
     parser = ArgumentParser(prog='paperdoorknob', description='Print glowfic')
+    parser.add_argument(
+        '--cache_path',
+        metavar='PATH',
+        help='Where to keep the http cache (instead of %(default)s)',
+        default=os.path.join(xdg_cache_home(), "paperdoorknob"))
     parser.add_argument(
         '--timeout',
         help='How long to wait for HTTP requests, in seconds',
@@ -19,14 +53,17 @@ def command_line_parser() -> ArgumentParser:
     return parser
 
 
-def fetch(url: str, timeout: int) -> None:
-    r = requests.get(url, timeout=timeout)
-    r.raise_for_status()
+def fetch(url: str, session: requests.Session, timeout: int) -> BeautifulSoup:
+    with session.get(url, timeout=timeout) as r:
+        r.raise_for_status()
+        return BeautifulSoup(r.text, 'html.parser')
 
 
 def main() -> None:
     args = command_line_parser().parse_args()
-    fetch(args.url, args.timeout)
+    with requests_cache.CachedSession(args.cache_path, cache_control=True) as session:
+        html = fetch(args.url, session, args.timeout)
+        Post(html)
 
 
 if __name__ == '__main__':