244 lines
7.1 KiB
Ruby
244 lines
7.1 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, **options)
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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 '' if raw_content.blank?
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unless status.local?
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html = reformat(raw_content)
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html = encode_custom_emojis(html, status.emojis) if options[:custom_emojify]
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return html.html_safe # rubocop:disable Rails/OutputSafety
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end
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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 = encode_custom_emojis(html, status.emojis) if options[:custom_emojify]
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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)
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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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text = status.text.gsub(/(<br \/>|<br>|<\/p>)+/) { |match| "#{match}\n" }
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strip_tags(text)
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end
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def simplified_format(account, **options)
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html = account.local? ? linkify(account.note) : reformat(account.note)
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html = encode_custom_emojis(html, account.emojis) if options[:custom_emojify]
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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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def format_spoiler(status)
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html = encode(status.spoiler_text)
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html = encode_custom_emojis(html, status.emojis)
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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def format_display_name(account, **options)
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html = encode(account.display_name.presence || account.username)
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html = encode_custom_emojis(html, account.emojis) if options[:custom_emojify]
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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def format_field(account, str, **options)
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return reformat(str).html_safe unless account.local? # rubocop:disable Rails/OutputSafety
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html = encode_and_link_urls(str, me: true)
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html = encode_custom_emojis(html, account.emojis) if options[:custom_emojify]
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html.html_safe # rubocop:disable Rails/OutputSafety
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end
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def linkify(text)
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html = encode_and_link_urls(text)
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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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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, options = {})
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entities = Extractor.extract_entities_with_indices(html, extract_url_without_protocol: false)
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if accounts.is_a?(Hash)
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options = accounts
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accounts = nil
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end
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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, options)
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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 count_tag_nesting(tag)
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if tag[1] == '/' then -1
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elsif tag[-2] == '/' then 0
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else 1
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end
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end
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def encode_custom_emojis(html, emojis)
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return html if emojis.empty?
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emoji_map = emojis.map { |e| [e.shortcode, full_asset_url(e.image.url(:static))] }.to_h
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i = -1
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tag_open_index = nil
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inside_shortname = false
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shortname_start_index = -1
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invisible_depth = 0
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while i + 1 < html.size
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i += 1
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if invisible_depth.zero? && inside_shortname && html[i] == ':'
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shortcode = html[shortname_start_index + 1..i - 1]
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emoji = emoji_map[shortcode]
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if emoji
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replacement = "<img draggable=\"false\" class=\"emojione\" alt=\":#{shortcode}:\" title=\":#{shortcode}:\" src=\"#{emoji}\" />"
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before_html = shortname_start_index.positive? ? html[0..shortname_start_index - 1] : ''
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html = before_html + replacement + html[i + 1..-1]
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i += replacement.size - (shortcode.size + 2) - 1
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else
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i -= 1
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end
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inside_shortname = false
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elsif tag_open_index && html[i] == '>'
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tag = html[tag_open_index..i]
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tag_open_index = nil
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if invisible_depth.positive?
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invisible_depth += count_tag_nesting(tag)
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elsif tag == '<span class="invisible">'
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invisible_depth = 1
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end
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elsif html[i] == '<'
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tag_open_index = i
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inside_shortname = false
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elsif !tag_open_index && html[i] == ':'
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inside_shortname = true
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shortname_start_index = i
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end
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end
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html
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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, options = {})
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url = Addressable::URI.parse(entity[:url])
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html_attrs = { target: '_blank', rel: 'nofollow noopener' }
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html_attrs[:rel] = "me #{html_attrs[:rel]}" if options[:me]
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Twitter::Autolink.send(:link_to_text, entity, link_html(entity[:url]), 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 = EntityCache.instance.mention(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\">#{encode(prefix)}</span><span class=\"#{cutoff ? 'ellipsis' : ''}\">#{encode(text)}</span><span class=\"invisible\">#{encode(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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