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# frozen_string_literal: true
class TextFormatter
include ActionView::Helpers::TextHelper
include ERB::Util
include RoutingHelper
URL_PREFIX_REGEX = /\A(https?:\/\/(www\.)?|xmpp:)/.freeze
DEFAULT_REL = %w(nofollow noopener noreferrer).freeze
DEFAULT_OPTIONS = {
multiline: true,
}.freeze
attr_reader :text, :options
# @param [String] text
# @param [Hash] options
# @option options [Boolean] :multiline
# @option options [Boolean] :with_domains
# @option options [Boolean] :with_rel_me
# @option options [Array<Account>] :preloaded_accounts
def initialize(text, options = {})
@text = text
@options = DEFAULT_OPTIONS.merge(options)
end
def entities
@entities ||= Extractor.extract_entities_with_indices(text, extract_url_without_protocol: false)
end
def to_s
return ''.html_safe if text.blank?
html = rewrite do |entity|
if entity[:url]
link_to_url(entity)
elsif entity[:hashtag]
link_to_hashtag(entity)
elsif entity[:screen_name]
link_to_mention(entity)
end
end
html = simple_format(html, {}, sanitize: false).delete("\n") if multiline?
html.html_safe # rubocop:disable Rails/OutputSafety
end
private
def rewrite
entities.sort_by! do |entity|
entity[:indices].first
end
result = ''.dup
last_index = entities.reduce(0) do |index, entity|
indices = entity[:indices]
result << h(text[index...indices.first])
result << yield(entity)
indices.last
end
result << h(text[last_index..-1])
result
end
def link_to_url(entity)
url = Addressable::URI.parse(entity[:url]).to_s
rel = with_rel_me? ? (DEFAULT_REL + %w(me)) : DEFAULT_REL
prefix = url.match(URL_PREFIX_REGEX).to_s
display_url = url[prefix.length, 30]
suffix = url[prefix.length + 30..-1]
cutoff = url[prefix.length..-1].length > 30
<<~HTML.squish
<a href="#{h(url)}" target="_blank" rel="#{rel.join(' ')}"><span class="invisible">#{h(prefix)}</span><span class="#{cutoff ? 'ellipsis' : ''}">#{h(display_url)}</span><span class="invisible">#{h(suffix)}</span></a>
HTML
rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError
h(entity[:url])
end
def link_to_hashtag(entity)
hashtag = entity[:hashtag]
url = tag_url(hashtag)
<<~HTML.squish
<a href="#{h(url)}" class="mention hashtag" rel="tag">#<span>#{h(hashtag)}</span></a>
HTML
end
def link_to_mention(entity)
username, domain = entity[:screen_name].split('@')
domain = nil if local_domain?(domain)
account = nil
if preloaded_accounts?
same_username_hits = 0
preloaded_accounts.each do |other_account|
same_username = other_account.username.casecmp(username).zero?
same_domain = other_account.domain.nil? ? domain.nil? : other_account.domain.casecmp(domain)&.zero?
if same_username && !same_domain
same_username_hits += 1
elsif same_username && same_domain
account = other_account
end
end
else
account = entity_cache.mention(username, domain)
end
return "@#{h(entity[:screen_name])}" if account.nil?
url = ActivityPub::TagManager.instance.url_for(account)
display_username = same_username_hits&.positive? || with_domains? ? account.pretty_acct : account.username
<<~HTML.squish
<span class="h-card"><a href="#{h(url)}" class="u-url mention">@<span>#{h(display_username)}</span></a></span>
HTML
end
def entity_cache
@entity_cache ||= EntityCache.instance
end
def tag_manager
@tag_manager ||= TagManager.instance
end
delegate :local_domain?, to: :tag_manager
def multiline?
options[:multiline]
end
def with_domains?
options[:with_domains]
end
def with_rel_me?
options[:with_rel_me]
end
def preloaded_accounts
options[:preloaded_accounts]
end
def preloaded_accounts?
preloaded_accounts.present?
end
end
|
