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# SPDX-License-Identifier: CC0-1.0
# koszko.org website logic.
# Copyright (C) 2021, 2022 Wojtek Kosior
import gettext
import re
import dataclasses as dc
import typing as t
from pathlib import Path, PurePosixPath
import flask
import werkzeug
import jinja2
import jinja2.exceptions
here = Path(__file__).resolve().parent
pages = {
'index.html'
}
langs_short_2_long = {
'en': 'en_US',
'pl': 'pl_PL'
}
langs_long_2_short = dict((v, k) for k, v in langs_short_2_long.items())
default_locale = 'pl_PL'
def raise_exception(msg: str) -> t.NoReturn:
raise Exception(msg)
post_titles_pl = {
'gospel-despite-no-enthusiasm': 'Dobra Nowina pomimo zniechęcenia',
'how-i-fought...-another-view': 'Jak walczyłem... inne spojrzenie'
}
post_titles_en = {
'gospel-despite-no-enthusiasm': 'Gospel despite lack of enthusiasm',
'how-i-fought...-another-view': 'How I fought... another view'
}
post_titles = {'en': post_titles_en, 'pl': post_titles_pl}
@dc.dataclass(frozen=True)
class PostData:
date: str
page_path: str
title: str
def __lt__(self, other: 'PostData') -> bool:
return (other.date, self.page_path) < (self.date, other.page_path)
post_filename_re = re.compile(
r'''
^
(?P<date>20[0-9][0-9]-[0-1][0-9]-[0-3][0-9])
-
(?P<post_identifier>.*)
\.html\.jinja
$
''',
re.VERBOSE
)
def get_posts(lang: str) -> t.Sequence[PostData]:
lang_dir = here / 'templates' / lang
posts_data = []
for template_path in (lang_dir / 'posts').glob('20*'):
filename_match = post_filename_re.match(template_path.name)
assert filename_match is not None
date = filename_match.group('date')
post_identifier = filename_match.group('post_identifier')
page_path = f'posts/{date}-{post_identifier}.html'
title = post_titles[lang][post_identifier]
posts_data.append(PostData(date=date, page_path=page_path, title=title))
return sorted(posts_data)
@dc.dataclass(init=False)
class Website(flask.Flask):
def __init__(self) -> None:
super().__init__(__name__)
self.jinja_options = {
**self.jinja_options,
'loader': jinja2.PackageLoader(__package__),
'autoescape': jinja2.select_autoescape(['.jinja']),
'lstrip_blocks': True,
'extensions': [
*self.jinja_options.get('extensions', []),
'jinja2.ext.i18n',
'jinja2.ext.do'
]
}
self.jinja_env.globals['raise'] = raise_exception
self.jinja_env.globals['get_posts'] = get_posts
def koszko_install_translations(self, locale: str) -> None:
translations = gettext.translation(
'messages',
localedir = here / 'locales',
languages = [locale]
)
self.jinja_env.install_gettext_translations(translations)
website_app = Website()
def show_page(lang_short: str, page_path: str) -> str:
for segment in PurePosixPath(page_path).parts:
if segment.startswith('__'):
flask.abort(404)
effective_page_path = '__index.html' if page_path == '' else page_path
app = t.cast(Website, flask.current_app)
app.koszko_install_translations(langs_short_2_long[lang_short])
for prefix in [f'{lang_short}', '']:
pure_path = PurePosixPath(prefix) / f'{effective_page_path}.jinja'
footer_path = pure_path.parent / f'__footer_for_{pure_path.name}'
try:
html = flask.render_template(
str(pure_path),
lang_short = lang_short,
page_path = page_path,
dedicated_footer_path = str(footer_path)
)
break
except jinja2.exceptions.TemplateNotFound:
if prefix == '':
raise
return html
for lang in langs_short_2_long.keys():
def __show_page_in_lang(page_path: str, lang_short: str = lang) -> str:
return show_page(lang_short, page_path)
website_app.add_url_rule(
f'/{lang}/<path:page_path>',
f'show_page_in_{lang}',
__show_page_in_lang,
methods=['GET']
)
def __show_main_page_in_lang(lang_short: str = lang) -> str:
return show_page(lang_short, '')
website_app.add_url_rule(
f'/{lang}/',
f'show_main_page_in_{lang}',
__show_main_page_in_lang,
methods=['GET']
)
@website_app.route('/<path:page_path>', methods=['GET'])
def redirect_to_resource(page_path) -> werkzeug.Response:
if page_path != '':
path_start = PurePosixPath(page_path).parts[0]
if path_start == 'sideload':
return flask.Response(
"Incomplete server configuration - requests for '/sideload/' not routed as they should be.",
500
)
# Route to other stuff that was on this domain before and has been moved
# under '/sideload/'.
for name in ['fraktal', 'mm']:
if path_start == name:
return flask.redirect(f'/sideload/{name}')
# Make all resources from '/static' aliased under '/'.
if not page_path.endswith('.html'):
return flask.redirect(f'/static/{page_path}')
# Redirect to the most suitable language version of a page.
chosen_locale = flask.request.accept_languages.best_match(
langs_short_2_long.values(),
default = default_locale
)
if chosen_locale is None:
chosen_locale = default_locale
lang_short = langs_long_2_short[chosen_locale]
url = flask.url_for(
f'.show_page_in_{lang_short}',
page_path = page_path
)
return flask.redirect(url)
@website_app.route('/', methods=['GET'])
def redirect_to_lang_main_page() -> werkzeug.Response:
return redirect_to_resource('')
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