class ActionText::Attachment

def attachable_attributes
  @attachable_attributes ||= (attachable.try(:to_rich_text_attributes) || {}).stringify_keys
end

def caption
  node_attributes["caption"].presence
end

def fragment_by_canonicalizing_attachments(content)
  fragment_by_minifying_attachments(fragment_by_converting_trix_attachments(content))
end

def from_attachable(attachable, attributes = {})
  if node = node_from_attributes(attachable.to_rich_text_attributes(attributes))
    new(node, attachable)
  end
end

def from_attachables(attachables)
  Array(attachables).filter_map { |attachable| from_attachable(attachable) }
end

def from_attributes(attributes, attachable = nil)
  if node = node_from_attributes(attributes)
    from_node(node, attachable)
  end
end

def from_node(node, attachable = nil)
  new(node, attachable || ActionText::Attachable.from_node(node))
end

def full_attributes
  node_attributes.merge(attachable_attributes).merge(sgid_attributes)
end

def initialize(node, attachable)
  @node = node
  @attachable = attachable
end

def inspect
  "#<#{self.class.name} attachable=#{attachable.inspect}>"
end

def node_attributes
  @node_attributes ||= ATTRIBUTES.map { |name| [ name.underscore, node[name] ] }.to_h.compact
end

def node_from_attributes(attributes)
  if attributes = process_attributes(attributes).presence
    ActionText::HtmlConversion.create_element(tag_name, attributes)
  end
end

def process_attributes(attributes)
  attributes.transform_keys { |key| key.to_s.underscore.dasherize }.slice(*ATTRIBUTES)
end

def sgid_attributes
  @sgid_attributes ||= node_attributes.slice("sgid").presence || attachable_attributes.slice("sgid")
end

def to_html
  HtmlConversion.node_to_html(node)
end

def to_plain_text
  if respond_to?(:attachable_plain_text_representation)
    attachable_plain_text_representation(caption)
  else
    caption.to_s
  end
end

def to_s
  to_html
end

def with_full_attributes
  self.class.from_attributes(full_attributes, attachable)
end