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98 lines
2.7 KiB
98 lines
2.7 KiB
# frozen_string_literal: true |
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class EmojiFormatter |
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include RoutingHelper |
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DISALLOWED_BOUNDING_REGEX = /[[:alnum:]:]/.freeze |
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attr_reader :html, :custom_emojis, :options |
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# @param [ActiveSupport::SafeBuffer] html |
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# @param [Array<CustomEmoji>] custom_emojis |
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# @param [Hash] options |
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# @option options [Boolean] :animate |
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def initialize(html, custom_emojis, options = {}) |
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raise ArgumentError unless html.html_safe? |
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@html = html |
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@custom_emojis = custom_emojis |
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@options = options |
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end |
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def to_s |
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return html if custom_emojis.empty? || html.blank? |
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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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last_index = 0 |
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result = ''.dup |
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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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inside_shortname = false |
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shortcode = html[shortname_start_index + 1..i - 1] |
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char_after = html[i + 1] |
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next unless (char_after.nil? || !DISALLOWED_BOUNDING_REGEX.match?(char_after)) && (emoji = emoji_map[shortcode]) |
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result << html[last_index..shortname_start_index - 1] if shortname_start_index.positive? |
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result << image_for_emoji(shortcode, emoji) |
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last_index = i + 1 |
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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] == ':' && (i.zero? || !DISALLOWED_BOUNDING_REGEX.match?(html[i - 1])) |
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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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result << html[last_index..-1] |
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result.html_safe # rubocop:disable Rails/OutputSafety |
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end |
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private |
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def emoji_map |
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@emoji_map ||= custom_emojis.each_with_object({}) { |e, h| h[e.shortcode] = [full_asset_url(e.image.url), full_asset_url(e.image.url(:static))] } |
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end |
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def count_tag_nesting(tag) |
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if tag[1] == '/' |
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-1 |
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elsif tag[-2] == '/' |
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0 |
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else |
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1 |
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end |
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end |
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def image_for_emoji(shortcode, emoji) |
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original_url, static_url = emoji |
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if animate? |
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image_tag(original_url, draggable: false, class: 'emojione', alt: ":#{shortcode}:", title: ":#{shortcode}:") |
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else |
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image_tag(original_url, draggable: false, class: 'emojione custom-emoji', alt: ":#{shortcode}:", title: ":#{shortcode}:", data: { original: original_url, static: static_url }) |
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end |
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end |
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def animate? |
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@options[:animate] |
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end |
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end
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