forked from treehouse/mastodon
118 lines
3.4 KiB
Ruby
118 lines
3.4 KiB
Ruby
# frozen_string_literal: true
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require 'singleton'
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class Formatter
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include Singleton
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include RoutingHelper
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include ActionView::Helpers::TextHelper
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include ActionView::Helpers::SanitizeHelper
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def format(status)
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return reformat(status.content) unless status.local?
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html = status.text
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html = encode_and_link_urls(html)
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html = simple_format(html, {}, sanitize: false)
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html = html.delete("\n")
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html = link_mentions(html, status.mentions)
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html = link_hashtags(html)
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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def reformat(html)
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sanitize(html, tags: %w(a br p span), attributes: %w(href rel class))
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end
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def plaintext(status)
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return status.text if status.local?
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strip_tags(status.text)
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end
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def simplified_format(account)
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return reformat(account.note) unless account.local?
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html = encode_and_link_urls(account.note)
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html = simple_format(html, {}, sanitize: false)
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html = html.delete("\n")
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html = link_accounts(html)
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html = link_hashtags(html)
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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private
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def encode(html)
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HTMLEntities.new.encode(html)
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end
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def encode_and_link_urls(html)
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entities = Twitter::Extractor.extract_urls_with_indices(html, extract_url_without_protocol: false)
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entities = entities.sort_by { |entity| entity[:indices].first }
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chars = html.to_s.to_char_a
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html_attrs = {
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target: '_blank',
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rel: 'nofollow noopener',
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}
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result = ''
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last_index = entities.reduce(0) do |index, entity|
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normalized_url = Addressable::URI.parse(entity[:url]).normalize
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indices = entity[:indices]
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result += encode(chars[index...indices.first].join)
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result += Twitter::Autolink.send(:link_to_text, entity, link_html(entity[:url]), normalized_url, html_attrs)
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indices.last
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end
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result += encode(chars[last_index..-1].join)
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end
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def link_mentions(html, mentions)
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html.gsub(Account::MENTION_RE) do |match|
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acct = Account::MENTION_RE.match(match)[1]
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mention = mentions.find { |item| TagManager.instance.same_acct?(item.account.acct, acct) }
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mention.nil? ? match : mention_html(match, mention.account)
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end
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end
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def link_accounts(html)
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html.gsub(Account::MENTION_RE) do |match|
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acct = Account::MENTION_RE.match(match)[1]
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username, domain = acct.split('@')
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domain = nil if TagManager.instance.local_domain?(domain)
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account = Account.find_remote(username, domain)
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account.nil? ? match : mention_html(match, account)
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end
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end
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def link_hashtags(html)
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html.gsub(Tag::HASHTAG_RE) do |match|
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hashtag_html(match)
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end
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end
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def link_html(url)
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url = Addressable::URI.parse(url).display_uri.to_s
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prefix = url.match(/\Ahttps?:\/\/(www\.)?/).to_s
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text = url[prefix.length, 30]
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suffix = url[prefix.length + 30..-1]
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cutoff = url[prefix.length..-1].length > 30
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"<span class=\"invisible\">#{prefix}</span><span class=\"#{cutoff ? 'ellipsis' : ''}\">#{text}</span><span class=\"invisible\">#{suffix}</span>"
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end
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def hashtag_html(match)
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prefix, _, affix = match.rpartition('#')
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"#{prefix}<a href=\"#{tag_url(affix.downcase)}\" class=\"mention hashtag\">#<span>#{affix}</span></a>"
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end
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def mention_html(match, account)
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"#{match.split('@').first}<span class=\"h-card\"><a href=\"#{TagManager.instance.url_for(account)}\" class=\"u-url mention\">@<span>#{account.username}</span></a></span>"
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end
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end
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