# frozen_string_literal: true require 'singleton' require_relative './sanitize_config' class Formatter include Singleton include RoutingHelper include ActionView::Helpers::TextHelper def format(status) return reformat(status.content) unless status.local? html = status.text html = encode_and_link_urls(html, status.mentions) html = simple_format(html, {}, sanitize: false) html = html.delete("\n") html.html_safe # rubocop:disable Rails/OutputSafety end def reformat(html) sanitize(html, Sanitize::Config::MASTODON_STRICT).html_safe # rubocop:disable Rails/OutputSafety end def plaintext(status) return status.text if status.local? strip_tags(status.text) end def simplified_format(account) return reformat(account.note) unless account.local? html = encode_and_link_urls(account.note) html = simple_format(html, {}, sanitize: false) html = html.delete("\n") html.html_safe # rubocop:disable Rails/OutputSafety end def sanitize(html, config) Sanitize.fragment(html, config) end private def encode(html) HTMLEntities.new.encode(html) end def encode_and_link_urls(html, mentions = nil) entities = Extractor.extract_entities_with_indices(html, extract_url_without_protocol: false) rewrite(html.dup, entities) do |entity| if entity[:url] link_to_url(entity) elsif entity[:hashtag] link_to_hashtag(entity) elsif entity[:screen_name] link_to_mention(entity, mentions) end end end def rewrite(text, entities) chars = text.to_s.to_char_a # sort by start index entities = entities.sort_by do |entity| indices = entity.respond_to?(:indices) ? entity.indices : entity[:indices] indices.first end result = [] last_index = entities.reduce(0) do |index, entity| indices = entity.respond_to?(:indices) ? entity.indices : entity[:indices] result << encode(chars[index...indices.first].join) result << yield(entity) indices.last end result << encode(chars[last_index..-1].join) result.flatten.join end def link_to_url(entity) normalized_url = Addressable::URI.parse(entity[:url]).normalize html_attrs = { target: '_blank', rel: 'nofollow noopener', } Twitter::Autolink.send(:link_to_text, entity, link_html(entity[:url]), normalized_url, html_attrs) end def link_to_mention(entity, mentions) acct = entity[:screen_name] return link_to_account(acct) unless mentions mention = mentions.find { |item| TagManager.instance.same_acct?(item.account.acct, acct) } mention ? mention_html(mention.account) : "@#{acct}" end def link_to_account(acct) username, domain = acct.split('@') domain = nil if TagManager.instance.local_domain?(domain) account = Account.find_remote(username, domain) account ? mention_html(account) : "@#{acct}" end def link_to_hashtag(entity) hashtag_html(entity[:hashtag]) end def link_html(url) url = Addressable::URI.parse(url).display_uri.to_s prefix = url.match(/\Ahttps?:\/\/(www\.)?/).to_s text = url[prefix.length, 30] suffix = url[prefix.length + 30..-1] cutoff = url[prefix.length..-1].length > 30 "<span class=\"invisible\">#{prefix}</span><span class=\"#{cutoff ? 'ellipsis' : ''}\">#{text}</span><span class=\"invisible\">#{suffix}</span>" end def hashtag_html(tag) "<a href=\"#{tag_url(tag.downcase)}\" class=\"mention hashtag\">#<span>#{tag}</span></a>" end def mention_html(account) "<span class=\"h-card\"><a href=\"#{TagManager.instance.url_for(account)}\" class=\"u-url mention\">@<span>#{account.username}</span></a></span>" end end