151 lines
4.1 KiB
Ruby
151 lines
4.1 KiB
Ruby
# frozen_string_literal: true
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require 'singleton'
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require_relative './sanitize_config'
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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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def format(status)
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if status.reblog?
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prepend_reblog = status.reblog.account.acct
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status = status.proper
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else
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prepend_reblog = false
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end
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raw_content = status.text
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return reformat(raw_content) unless status.local?
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linkable_accounts = status.mentions.map(&:account)
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linkable_accounts << status.account
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html = raw_content
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html = "RT @#{prepend_reblog} #{html}" if prepend_reblog
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html = encode_and_link_urls(html, linkable_accounts)
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html = simple_format(html, {}, sanitize: false)
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html = html.delete("\n")
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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, Sanitize::Config::MASTODON_STRICT).html_safe # rubocop:disable Rails/OutputSafety
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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.html_safe # rubocop:disable Rails/OutputSafety
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end
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def sanitize(html, config)
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Sanitize.fragment(html, config)
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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, accounts = nil)
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entities = Extractor.extract_entities_with_indices(html, extract_url_without_protocol: false)
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rewrite(html.dup, entities) do |entity|
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if entity[:url]
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link_to_url(entity)
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elsif entity[:hashtag]
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link_to_hashtag(entity)
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elsif entity[:screen_name]
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link_to_mention(entity, accounts)
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end
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end
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end
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def rewrite(text, entities)
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chars = text.to_s.to_char_a
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# Sort by start index
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entities = entities.sort_by do |entity|
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indices = entity.respond_to?(:indices) ? entity.indices : entity[:indices]
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indices.first
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end
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result = []
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last_index = entities.reduce(0) do |index, entity|
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indices = entity.respond_to?(:indices) ? entity.indices : entity[:indices]
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result << encode(chars[index...indices.first].join)
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result << yield(entity)
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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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result.flatten.join
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end
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def link_to_url(entity)
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normalized_url = Addressable::URI.parse(entity[:url]).normalize
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html_attrs = { target: '_blank', rel: 'nofollow noopener' }
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Twitter::Autolink.send(:link_to_text, entity, link_html(entity[:url]), normalized_url, html_attrs)
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rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError
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encode(entity[:url])
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end
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def link_to_mention(entity, linkable_accounts)
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acct = entity[:screen_name]
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return link_to_account(acct) unless linkable_accounts
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account = linkable_accounts.find { |item| TagManager.instance.same_acct?(item.acct, acct) }
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account ? mention_html(account) : "@#{acct}"
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end
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def link_to_account(acct)
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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 ? mention_html(account) : "@#{acct}"
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end
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def link_to_hashtag(entity)
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hashtag_html(entity[:hashtag])
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end
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def link_html(url)
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url = Addressable::URI.parse(url).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(tag)
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"<a href=\"#{tag_url(tag.downcase)}\" class=\"mention hashtag\" rel=\"tag\">#<span>#{tag}</span></a>"
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end
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def mention_html(account)
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"<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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