Contemplate generating LaTeX directly

[paperdoorknob] / paperdoorknob.py

diff --git a/paperdoorknob.py b/paperdoorknob.py
index 8f1d840d4a4f0bc9155e6e645b19535442cb2914..3b86cb8da08144c3862ab80b757b0194c086dbad 100644 (file)
--- a/paperdoorknob.py
+++ b/paperdoorknob.py
@@ -6,15 +6,86 @@
 
 
 from argparse import ArgumentParser
+import itertools
+import os.path
+
+from typing import IO, Iterable
+
+from bs4 import BeautifulSoup
+from bs4.element import Tag
+from xdg_base_dirs import xdg_cache_home
+
+from fetch import CachingFetcher, Fetcher
+from texify import PandocTexifier, Texifier
 
 
 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(
+        '--out',
+        help='The filename stem at which to write output ' +
+             '(eg: "%(default)s" produces %(default)s.text, %(default)s.pdf, etc.)',
+        default='book')
+    parser.add_argument('--pandoc', help='Location of the pandoc executable')
+    parser.add_argument(
+        '--timeout',
+        help='How long to wait for HTTP requests, in seconds',
+        default=30)
+    parser.add_argument('url', help='URL to retrieve')
     return parser
 
 
+def parse(content: bytes) -> BeautifulSoup:
+    return BeautifulSoup(content, 'html.parser')
+
+
+def clean(html: BeautifulSoup) -> BeautifulSoup:
+    for eb in html.find_all("div", class_="post-edit-box"):
+        eb.decompose()
+    for footer in html.find_all("div", class_="post-footer"):
+        footer.decompose()
+    return html
+
+
+def replies(html: BeautifulSoup) -> Iterable[Tag]:
+    def text() -> Tag:
+        body = html.body
+        assert body
+        text = body.find_next("div", class_="post-post")
+        assert isinstance(text, Tag)
+        return text
+
+    def the_replies() -> Iterable[Tag]:
+        rs = html.find_all("div", class_="post-reply")
+        assert all(isinstance(r, Tag) for r in rs)
+        return rs
+
+    return itertools.chain([text()], the_replies())
+
+
+def process(
+        url: str,
+        fetcher: Fetcher,
+        texifier: Texifier,
+        texout: IO[bytes]) -> None:
+    texout.write(b'\\documentclass{article}\n\\begin{document}\n')
+    html = clean(parse(fetcher.fetch(url)))
+    for r in replies(html):
+        texout.write(texifier.texify(r))
+    texout.write(b'\\end{document}\n')
+
+
 def main() -> None:
-    command_line_parser().parse_args()
+    args = command_line_parser().parse_args()
+    texifier = PandocTexifier(args.pandoc or 'pandoc')
+    with CachingFetcher(args.cache_path, args.timeout) as fetcher:
+        with open(args.out + '.tex', 'wb') as texout:
+            process(args.url, fetcher, texifier, texout)
 
 
 if __name__ == '__main__':