Support attachments on activitystreams.Object

activitystreams/activity.go

@@ -117,6 +117,7 @@ type Object struct {
 	Content      string            `json:"content"`
 	ContentMap   map[string]string `json:"contentMap,omitempty"`
 	Tag          []Tag             `json:"tag"`
+	Attachment   []Attachment      `json:"attachment,omitempty"`
 
 	// Extensions
 	// NOTE: add extensions here

activitystreams/attachment.go

@@ -0,0 +1,12 @@
+package activitystreams
+
+type Attachment struct {
+	Type      AttachmentType `json:"type"`
+	URL       string         `json:"url"`
+	MediaType string         `json:"mediaType"`
+	Name      string         `json:"name"`
+}
+
+type AttachmentType string
+
+const AttachImage AttachmentType = "Image"