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133 lines
4.3 KiB
Python
133 lines
4.3 KiB
Python
import re
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from docutils import nodes
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from docutils.parsers.rst import Directive, directives
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from docutils.writers._html_base import HTMLTranslator
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class SEONode(nodes.General, nodes.Element):
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def __init__(self, title=None, description=None, image=None,
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author=None, author_twitter=None, keywords=None):
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super(SEONode, self).__init__()
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self.title = title
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self.description = description
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self.image = image
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self.author = author
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self.author_twitter = author_twitter
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self.keywords = keywords
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class RedirectNode(nodes.General, nodes.Element):
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def __init__(self, url=None):
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super(RedirectNode, self).__init__()
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self.url = url
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def seo_visit(self: HTMLTranslator, node: SEONode):
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def encode_text(text):
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special_characters = {ord('&'): '&',
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ord('<'): '<',
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ord('"'): '"',
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ord('>'): '>'}
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return text.translate(special_characters)
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def create_content_meta(name, content):
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if content is None:
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return
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self.meta.append('<meta name="{}" content="{}">\n'.format(name, encode_text(content)))
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def create_itemprop_meta(name, content):
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if content is None:
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return
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self.meta.append('<meta itemprop="{}" content="{}">\n'.format(name, encode_text(content)))
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def create_property_meta(name, content):
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if content is None:
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return
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self.meta.append('<meta property="{}" content="{}"/>\n'.format(name, encode_text(content)))
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# Base
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create_content_meta("description", node.description)
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create_content_meta("keywords", node.keywords)
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# Schema.org
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create_itemprop_meta("name", node.title)
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create_itemprop_meta("description", node.description)
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create_itemprop_meta("image", node.image)
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# Twitter
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create_content_meta("twitter:title", node.title)
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create_content_meta("twitter:image:src", node.image)
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create_content_meta("twitter:card", "summary")
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create_content_meta("twitter:site", "@OttoWinter_")
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create_content_meta("twitter:creator", node.author_twitter)
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create_content_meta("twitter:description", node.description)
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# Open Graph
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create_property_meta("og:title", node.title)
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create_property_meta("og:image", node.image)
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create_property_meta("og:type", "article" if node.author is not None else "website")
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create_property_meta("og:site_name", "esphomelib")
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create_property_meta("og:description", node.description)
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# Misc
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create_content_meta("HandheldFriendly", "True")
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create_content_meta("MobileOptimized", "320")
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create_content_meta("theme-color", "#DFDFDF")
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def redirect_visit(self: HTMLTranslator, node: RedirectNode):
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self.meta.append('<meta http-equiv="refresh" content="0; url={}">'.format(node.url))
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self.body.append(self.starttag(node, 'p',
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'Redirecting to <a href="{0}">{0}</a>'.format(node.url)))
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def seo_depart(self, _):
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pass
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def redirect_depart(self, _):
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self.body.append('</p>')
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class SEODirective(Directive):
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option_spec = {
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'title': directives.unchanged,
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'description': directives.unchanged,
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'image': directives.path,
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'author': directives.unchanged,
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'author_twitter': directives.unchanged,
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'keywords': directives.unchanged,
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}
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def run(self):
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env = self.state.document.settings.env
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title_match = re.match(r'.+<title>(.+)</title>.+', str(self.state.document))
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if title_match is not None and 'title' not in self.options:
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self.options['title'] = title_match.group(1)
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image = self.options.get('image')
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if image is not None:
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if not image.startswith('/'):
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image = '/_images/' + image
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self.options['image'] = env.config.html_baseurl + image
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return [SEONode(**self.options)]
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class RedirectDirective(Directive):
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option_spec = {
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'url': directives.unchanged,
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}
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def run(self):
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env = self.state.document.settings.env
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return [RedirectNode(**self.options)]
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def setup(app):
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app.add_directive('seo', SEODirective)
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app.add_node(SEONode, html=(seo_visit, seo_depart))
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app.add_directive('redirect', RedirectDirective)
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app.add_node(RedirectNode, html=(redirect_visit, redirect_depart))
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return {'version': '1.0'}
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