Send Salmon interactions

app/services/unfollow_service.rb

@@ -0,0 +1,15 @@
+class UnfollowService < BaseService
+  # Unfollow and notify the remote user
+  # @param [Account] source_account Where to unfollow from
+  # @param [Account] target_account Which to unfollow
+  def call(source_account, target_account)
+    follow = source_account.unfollow!(target_account)
+    send_interaction_service.(follow.stream_entry, target_account) unless target_account.local?
+  end
+
+  private
+
+  def send_interaction_service
+    @send_interaction_service ||= SendInteractionService.new
+  end
+end