create fetch entity callback

and url_to callback

lib/diaspora_federation.rb

@@ -30,6 +30,8 @@ module DiasporaFederation
     queue_public_receive
     queue_private_receive
     save_entity_after_receive
+    fetch_public_entity
+    fetch_person_url_to
     update_pod
   )
 
@@ -125,7 +127,7 @@ module DiasporaFederation
     #
     # fetch_author_private_key_by_entity_guid
     #   Fetches a private key of the person who authored an entity identified by a given guid
-    #   @param [String] entity type (Post, Comment, Like, etc)
+    #   @param [String] entity_type (Post, Comment, Like, etc)
     #   @param [String] guid of the entity
     #   @return [OpenSSL::PKey::RSA] key
     #
@@ -136,20 +138,20 @@ module DiasporaFederation
     #
     # fetch_author_public_key_by_entity_guid
     #   Fetches a public key of the person who authored an entity identified by a given guid
-    #   @param [String] entity type (Post, Comment, Like, etc)
+    #   @param [String] entity_type (Post, Comment, Like, etc)
     #   @param [String] guid of the entity
     #   @return [OpenSSL::PKey::RSA] key
     #
     # entity_author_is_local?
     #   Reports if the author of the entity identified by a given guid is local on the pod
     #   where we operate.
-    #   @param [String] entity type (Post, Comment, Like, etc)
+    #   @param [String] entity_type (Post, Comment, Like, etc)
     #   @param [String] guid of the entity
     #   @return [Boolean]
     #
     # fetch_entity_author_id_by_guid
     #   Fetches Diaspora ID of the person who authored the entity identified by a given guid
-    #   @param [String] entity type (Post, Comment, Like, etc)
+    #   @param [String] entity_type (Post, Comment, Like, etc)
     #   @param [String] guid of the entity
     #   @return [String] Diaspora ID of the person
     #
@@ -169,6 +171,16 @@ module DiasporaFederation
     #   After the xml was parsed and processed the gem calls this callback to persist the entity
     #   @param [DiasporaFederation::Entity] entity the received entity after processing
     #
+    # fetch_public_entity
+    #   fetch a public entity from the database
+    #   @param [String] entity_type (Post, StatusMessage, etc)
+    #   @param [String] guid the guid of the entity
+    #
+    # fetch_person_url_to
+    #   fetch the url to path for a person
+    #   @param [String] diaspora_id
+    #   @param [String] path
+    #
     # update_pod
     #   Update the pod status
     #   @param [String] url the pod url

test/dummy/config/initializers/diaspora_federation.rb

@@ -100,6 +100,15 @@ DiasporaFederation.configure do |config|
     on :save_entity_after_receive do
     end
 
+    on :fetch_public_entity do |entity_type, guid|
+      type = DiasporaFederation::Entities.const_get(entity_type).entity_name
+      FactoryGirl.build("#{type}_entity", guid: guid)
+    end
+
+    on :fetch_person_url_to do |diaspora_id, path|
+      "http://#{diaspora_id.split('@').last}#{path}"
+    end
+
     on :update_pod do
     end
   end