module ActionText::Attachable

def attachable_content_type 

def attachable_content_type
  try(:content_type) || "application/octet-stream"
end

def attachable_filename 

def attachable_filename
  filename.to_s if respond_to?(:filename)
end

def attachable_filesize 

def attachable_filesize
  try(:byte_size) || try(:filesize)
end

def attachable_from_sgid(sgid) 

def attachable_from_sgid(sgid)
  from_attachable_sgid(sgid)
rescue ActiveRecord::RecordNotFound
  nil
end

def attachable_metadata 

def attachable_metadata
  try(:metadata) || {}
end

def attachable_sgid

to 'attachable' so it can't be reused for other purposes.
Returns the Signed Global ID for the attachable. The purpose of the ID is set 
def attachable_sgid
  to_sgid(expires_in: nil, for: LOCATOR_NAME).to_s
end

def attribute_names_for_serialization 

def attribute_names_for_serialization
  super + ["attachable_sgid"]
end

def from_attachable_sgid(sgid, options = {}) 

def from_attachable_sgid(sgid, options = {})
  method = sgid.is_a?(Array) ? :locate_many_signed : :locate_signed
  record = GlobalID::Locator.public_send(method, sgid, options.merge(for: LOCATOR_NAME))
  record || raise(ActiveRecord::RecordNotFound)
end

def from_attachable_sgid(sgid) 

def from_attachable_sgid(sgid)
  ActionText::Attachable.from_attachable_sgid(sgid, only: self)
end

def from_node(node)

ActionText::Attachable.from_node(attachment_node) # => person
attachment_node = fragment.find_all(ActionText::Attachment.tag_name).first
fragment = ActionText::Fragment.wrap(html)
html = %Q()
person = Person.create! name: "Javan"

Extracts the `ActionText::Attachable` from the attachment HTML node: 
def from_node(node)
  if attachable = attachable_from_sgid(node["sgid"])
    attachable
  elsif attachable = ActionText::Attachables::ContentAttachment.from_node(node)
    attachable
  elsif attachable = ActionText::Attachables::RemoteImage.from_node(node)
    attachable
  else
    ActionText::Attachables::MissingAttachable.new(node["sgid"])
  end
end

def previewable_attachable? 

def previewable_attachable?
  false
end

def read_attribute_for_serialization(key) 

def read_attribute_for_serialization(key)
  if key == "attachable_sgid"
    persisted? ? super : nil
  else
    super
  end
end

def to_attachable_partial_path

end
end
"users/attachable"
def to_attachable_partial_path
class User < ApplicationRecord

Override to render a different partial:

Defaults to `to_partial_path`.
Returns the path to the partial that is used for rendering the attachable. 
def to_attachable_partial_path
  to_partial_path
end

def to_missing_attachable_partial_path

end
end
"users/missing_attachable"
def self.to_missing_attachable_partial_path
class User < ApplicationRecord

Override to render a different partial:

attachables. Defaults to "action_text/attachables/missing_attachable".
Returns the path to the partial that is used for rendering missing 
def to_missing_attachable_partial_path
  ActionText::Attachables::MissingAttachable::DEFAULT_PARTIAL_PATH
end

def to_rich_text_attributes(attributes = {}) 

def to_rich_text_attributes(attributes = {})
  attributes.dup.tap do |attrs|
    attrs[:sgid] = attachable_sgid
    attrs[:content_type] = attachable_content_type
    attrs[:previewable] = true if previewable_attachable?
    attrs[:filename] = attachable_filename
    attrs[:filesize] = attachable_filesize
    attrs[:width] = attachable_metadata[:width]
    attrs[:height] = attachable_metadata[:height]
  end.compact
end

def to_trix_content_attachment_partial_path

end
end
"users/trix_content_attachment"
def to_trix_content_attachment_partial_path
class User < ApplicationRecord

Override to render a different partial:

Trix. Defaults to `to_partial_path`.
Returns the path to the partial that is used for rendering the attachable in 
def to_trix_content_attachment_partial_path
  to_partial_path
end