3 files changed, 97 insertions, 0 deletions
diff --git a/actiontext/lib/action_text/attachables/content_attachment.rb b/actiontext/lib/action_text/attachables/content_attachment.rb
new file mode 100644
index 0000000000..804f74713f
--- /dev/null
+++ b/actiontext/lib/action_text/attachables/content_attachment.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module ActionText
+  module Attachables
+    class ContentAttachment
+      include ActiveModel::Model
+
+      def self.from_node(node)
+        if node["content-type"]
+          if matches = node["content-type"].match(/vnd\.rubyonrails\.(.+)\.html/)
+            attachment = new(name: matches[1])
+            attachment if attachment.valid?
+          end
+        end
+      end
+
+      attr_accessor :name
+      validates_inclusion_of :name, in: %w( horizontal-rule )
+
+      def attachable_plain_text_representation(caption)
+        case name
+        when "horizontal-rule"
+          " ┄ "
+        else
+          " "
+        end
+      end
+
+      def to_partial_path
+        "action_text/attachables/content_attachment"
+      end
+
+      def to_trix_content_attachment_partial_path
+        "action_text/attachables/content_attachments/#{name.underscore}"
+      end
+    end
+  end
+end
diff --git a/actiontext/lib/action_text/attachables/missing_attachable.rb b/actiontext/lib/action_text/attachables/missing_attachable.rb
new file mode 100644
index 0000000000..2f3bd40563
--- /dev/null
+++ b/actiontext/lib/action_text/attachables/missing_attachable.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module ActionText
+  module Attachables
+    module MissingAttachable
+      extend ActiveModel::Naming
+
+      def self.to_partial_path
+        "action_text/attachables/missing_attachable"
+      end
+    end
+  end
+end
diff --git a/actiontext/lib/action_text/attachables/remote_image.rb b/actiontext/lib/action_text/attachables/remote_image.rb
new file mode 100644
index 0000000000..650b11862b
--- /dev/null
+++ b/actiontext/lib/action_text/attachables/remote_image.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module ActionText
+  module Attachables
+    class RemoteImage
+      extend ActiveModel::Naming
+
+      class << self
+        def from_node(node)
+          if node["url"] && content_type_is_image?(node["content-type"])
+            new(attributes_from_node(node))
+          end
+        end
+
+        private
+          def content_type_is_image?(content_type)
+            content_type.to_s =~ /^image(\/.+|$)/
+          end
+
+          def attributes_from_node(node)
+            { url: node["url"],
+              content_type: node["content-type"],
+              width: node["width"],
+              height: node["height"] }
+          end
+      end
+
+      attr_reader :url, :content_type, :width, :height
+
+      def initialize(attributes = {})
+        @url = attributes[:url]
+        @content_type = attributes[:content_type]
+        @width = attributes[:width]
+        @height = attributes[:height]
+      end
+
+      def attachable_plain_text_representation(caption)
+        "[#{caption || "Image"}]"
+      end
+
+      def to_partial_path
+        "action_text/attachables/remote_image"
+      end
+    end
+  end
+end