mirror of
https://github.com/searxng/searxng.git
synced 2024-08-24 15:10:17 +02:00
An administrator might decide to remove some of the .md files. This commit make sure to not crash the application.
188 lines
5.6 KiB
Python
188 lines
5.6 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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# pyright: basic
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"""Render SearXNG instance documentation.
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Usage in a Flask app route:
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.. code:: python
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from searx import infopage
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_INFO_PAGES = infopage.InfoPageSet(infopage.MistletoePage)
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@app.route('/info/<pagename>', methods=['GET'])
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def info(pagename):
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locale = request.preferences.get_value('locale')
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page = _INFO_PAGES.get_page(pagename, locale)
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"""
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__all__ = ['InfoPage', 'InfoPageSet']
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import os
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import os.path
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import logging
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import typing
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import urllib.parse
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import jinja2
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from flask.helpers import url_for
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from markdown_it import MarkdownIt
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from .. import get_setting
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from ..compat import cached_property
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from ..version import GIT_URL
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from ..locales import LOCALE_NAMES
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logger = logging.getLogger('searx.infopage')
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_INFO_FOLDER = os.path.abspath(os.path.dirname(__file__))
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class InfoPage:
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"""A page of the :py:obj:`online documentation <InfoPageSet>`."""
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def __init__(self, fname):
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self.fname = fname
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@cached_property
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def raw_content(self):
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"""Raw content of the page (without any jinja rendering)"""
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with open(self.fname, 'r', encoding='utf-8') as f:
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return f.read()
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@cached_property
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def content(self):
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"""Content of the page (rendered in a Jinja conntext)"""
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ctx = self.get_ctx()
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template = jinja2.Environment().from_string(self.raw_content)
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return template.render(**ctx)
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@cached_property
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def title(self):
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"""Title of the content (without any markup)"""
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t = ""
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for l in self.raw_content.split('\n'):
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if l.startswith('# '):
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t = l.strip('# ')
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return t
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@cached_property
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def html(self):
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"""Render Markdown (CommonMark_) to HTML by using markdown-it-py_.
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.. _CommonMark: https://commonmark.org/
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.. _markdown-it-py: https://github.com/executablebooks/markdown-it-py
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"""
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return (
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MarkdownIt("commonmark", {"typographer": True}).enable(["replacements", "smartquotes"]).render(self.content)
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)
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def get_ctx(self):
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"""Jinja context to render :py:obj:`InfoPage.content`"""
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def _md_link(name, url):
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url = url_for(url, _external=True)
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return "[%s](%s)" % (name, url)
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def _md_search(query):
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url = '%s?q=%s' % (url_for('search', _external=True), urllib.parse.quote(query))
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return '[%s](%s)' % (query, url)
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ctx = {}
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ctx['GIT_URL'] = GIT_URL
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ctx['get_setting'] = get_setting
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ctx['link'] = _md_link
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ctx['search'] = _md_search
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return ctx
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def __repr__(self):
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return f'<{self.__class__.__name__} fname={self.fname!r}>'
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class InfoPageSet: # pylint: disable=too-few-public-methods
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"""Cached rendering of the online documentation a SearXNG instance has.
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:param page_class: render online documentation by :py:obj:`InfoPage` parser.
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:type page_class: :py:obj:`InfoPage`
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:param info_folder: information directory
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:type info_folder: str
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"""
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def __init__(
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self, page_class: typing.Optional[typing.Type[InfoPage]] = None, info_folder: typing.Optional[str] = None
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):
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self.page_class = page_class or InfoPage
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self.folder: str = info_folder or _INFO_FOLDER
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"""location of the Markdwon files"""
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self.CACHE: typing.Dict[tuple, typing.Optional[InfoPage]] = {}
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self.locale_default: str = 'en'
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"""default language"""
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self.locales: typing.List[str] = [
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locale.replace('_', '-') for locale in os.listdir(_INFO_FOLDER) if locale.replace('_', '-') in LOCALE_NAMES
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]
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"""list of supported languages (aka locales)"""
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self.toc: typing.List[str] = [
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'search-syntax',
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'about',
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'donate',
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]
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"""list of articles in the online documentation"""
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def get_page(self, pagename: str, locale: typing.Optional[str] = None):
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"""Return ``pagename`` instance of :py:obj:`InfoPage`
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:param pagename: name of the page, a value from :py:obj:`InfoPageSet.toc`
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:type pagename: str
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:param locale: language of the page, e.g. ``en``, ``zh_Hans_CN``
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(default: :py:obj:`InfoPageSet.i18n_origin`)
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:type locale: str
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"""
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locale = locale or self.locale_default
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if pagename not in self.toc:
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return None
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if locale not in self.locales:
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return None
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cache_key = (pagename, locale)
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if cache_key in self.CACHE:
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return self.CACHE[cache_key]
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# not yet instantiated
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fname = os.path.join(self.folder, locale.replace('-', '_'), pagename) + '.md'
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if not os.path.exists(fname):
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logger.info('file %s does not exists', fname)
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self.CACHE[cache_key] = None
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return None
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page = self.page_class(fname)
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self.CACHE[cache_key] = page
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return page
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def iter_pages(self, locale: typing.Optional[str] = None, fallback_to_default=False):
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"""Iterate over all pages of the TOC"""
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locale = locale or self.locale_default
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for page_name in self.toc:
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page_locale = locale
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page = self.get_page(page_name, locale)
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if fallback_to_default and page is None:
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page_locale = self.locale_default
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page = self.get_page(page_name, self.locale_default)
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if page is not None:
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# page is None if the page was deleted by the administrator
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yield page_name, page_locale, page
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