discourse/plugins/chat/app/models/chat/null_message.rb

# frozen_string_literal: true

module Chat
  class NullMessage < Chat::Message
    def user
      nil
    end

    def build_excerpt
      nil
    end

    def id
      nil
    end

    def created_at
      Time.now # a proper NullTime object would be better, but this is good enough for now
    end
  end
end
FIX: ensures an empty last message won't cause errors (#23647) This would cause an error when deleting the original message of a thread, due to the non existing `last_message`. This fix is implemented using the null pattern. Note this commit is also using this opportunity to unify naming of null objects, `Chat::DeletedUser` becomes `Chat::NullUser`, it feels better to have a name describing what is the object, instead of a name describing why this object has to be used, which can change depending on cases. 2023-09-25 18:43:04 +08:00			`# frozen_string_literal: true`

			`module Chat`
			`class NullMessage < Chat::Message`
			`def user`
			`nil`
			`end`

FIX: build chat message excerpt for thread preview (#26765) Follow up to #26712 to account for older threads that don't have a persisted excerpt, as this was previously generated on every page load. This change allows us to build the excerpt on the fly when none exists, fixing the issue of missing message excerpts for thread previews (within channel) and thread lists (on mobile/desktop). 2024-04-26 14:29:35 +08:00			`def build_excerpt`
FIX: ensures an empty last message won't cause errors (#23647) This would cause an error when deleting the original message of a thread, due to the non existing `last_message`. This fix is implemented using the null pattern. Note this commit is also using this opportunity to unify naming of null objects, `Chat::DeletedUser` becomes `Chat::NullUser`, it feels better to have a name describing what is the object, instead of a name describing why this object has to be used, which can change depending on cases. 2023-09-25 18:43:04 +08:00			`nil`
			`end`

			`def id`
			`nil`
			`end`

			`def created_at`
			`Time.now # a proper NullTime object would be better, but this is good enough for now`
			`end`
			`end`
			`end`