190 lines
6.3 KiB
Python
190 lines
6.3 KiB
Python
import datetime
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import os
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import re
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from typing import Optional, List, Tuple, Type
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from flask import Flask, abort
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from markdown import markdown
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from .config import config
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from .latex import MarkdownLatex
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from ._sorters import PagesSorter, PagesSortByTime
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class BlogApp(Flask):
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_title_header_regex = re.compile(r"^#\s*((\[(.*)\])|(.*))")
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def __init__(self, *args, **kwargs):
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super().__init__(*args, template_folder=config.templates_dir, **kwargs)
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self.pages_dir = os.path.join(config.content_dir, "markdown")
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self.img_dir = config.default_img_dir
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self.css_dir = config.default_css_dir
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self.js_dir = config.default_js_dir
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self.fonts_dir = config.default_fonts_dir
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if not os.path.isdir(self.pages_dir):
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# If the `markdown` subfolder does not exist, then the whole
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# `config.content_dir` is treated as the root for markdown files.
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self.pages_dir = config.content_dir
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img_dir = os.path.join(config.content_dir, "img")
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if os.path.isdir(img_dir):
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self.img_dir = os.path.abspath(img_dir)
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else:
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self.img_dir = config.content_dir
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css_dir = os.path.join(config.content_dir, "css")
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if os.path.isdir(css_dir):
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self.css_dir = os.path.abspath(css_dir)
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js_dir = os.path.join(config.content_dir, "js")
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if os.path.isdir(js_dir):
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self.js_dir = os.path.abspath(js_dir)
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fonts_dir = os.path.join(config.content_dir, "fonts")
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if os.path.isdir(fonts_dir):
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self.fonts_dir = os.path.abspath(fonts_dir)
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templates_dir = os.path.join(config.content_dir, "templates")
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if os.path.isdir(templates_dir):
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self.template_folder = os.path.abspath(templates_dir)
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def get_page_metadata(self, page: str) -> dict:
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if not page.endswith(".md"):
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page = page + ".md"
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md_file = os.path.join(self.pages_dir, page)
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if not os.path.isfile(md_file):
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abort(404)
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metadata = {}
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with open(md_file, "r") as f:
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metadata["uri"] = "/article/" + page[:-3]
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for line in f:
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if not line:
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continue
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if not (m := re.match(r"^\[//]: # \(([^:]+):\s*(.*)\)\s*$", line)):
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break
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if m.group(1) == "published":
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metadata[m.group(1)] = datetime.datetime.fromisoformat(
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m.group(2)
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).date()
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else:
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metadata[m.group(1)] = m.group(2)
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if not metadata.get("title"):
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# If the `title` header isn't available in the file,
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# infer it from the first line of the file
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with open(md_file, "r") as f:
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header = ""
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for line in f.readlines():
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header = line
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break
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metadata["title_inferred"] = True
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m = self._title_header_regex.search(header)
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if m:
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metadata["title"] = m.group(3) or m.group(1)
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else:
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metadata["title"] = os.path.basename(md_file)
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if not metadata.get("published"):
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# If the `published` header isn't available in the file,
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# infer it from the file's creation date
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metadata["published"] = datetime.date.fromtimestamp(
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os.stat(md_file).st_ctime
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)
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metadata["published_inferred"] = True
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return metadata
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def get_page(
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self,
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page: str,
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title: Optional[str] = None,
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skip_header: bool = False,
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skip_html_head: bool = False,
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):
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if not page.endswith(".md"):
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page = page + ".md"
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metadata = self.get_page_metadata(page)
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# Don't duplicate the page title if it's been inferred
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if not (title or metadata.get("title_inferred")):
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title = metadata.get("title", config.title)
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with open(os.path.join(self.pages_dir, page), "r") as f:
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return render_template(
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"article.html",
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config=config,
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title=title,
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image=metadata.get("image"),
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description=metadata.get("description"),
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author=(
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re.match(r"(.+?)\s+<([^>]+>)", metadata["author"])[1]
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if "author" in metadata
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else None
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),
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author_email=(
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re.match(r"(.+?)\s+<([^>]+)>", metadata["author"])[2]
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if "author" in metadata
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else None
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),
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published=(
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metadata["published"].strftime("%b %d, %Y")
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if metadata.get("published")
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and not metadata.get("published_inferred")
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else None
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),
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content=markdown(
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f.read(), extensions=["fenced_code", "codehilite", MarkdownLatex()]
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),
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skip_header=skip_header,
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skip_html_head=skip_html_head,
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)
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def get_pages(
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self,
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with_content: bool = False,
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skip_header: bool = False,
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skip_html_head: bool = False,
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sorter: Type[PagesSorter] = PagesSortByTime,
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reverse: bool = True,
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) -> List[Tuple[int, dict]]:
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pages_dir = app.pages_dir.rstrip("/")
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pages = [
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{
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"path": os.path.join(root[len(pages_dir) + 1 :], f),
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"folder": root[len(pages_dir) + 1 :],
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"content": (
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self.get_page(
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os.path.join(root, f),
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skip_header=skip_header,
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skip_html_head=skip_html_head,
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)
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if with_content
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else ""
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),
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**self.get_page_metadata(os.path.join(root[len(pages_dir) + 1 :], f)),
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}
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for root, _, files in os.walk(pages_dir, followlinks=True)
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for f in files
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if f.endswith(".md")
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]
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sorter_func = sorter(pages)
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pages.sort(key=sorter_func, reverse=reverse)
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return [(i, page) for i, page in enumerate(pages)]
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app = BlogApp(__name__)
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from .routes import *
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# vim:sw=4:ts=4:et:
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