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