Introduced `node_store_moved_info' method in combox.silo.ComboxSilo class.

This method allows us to track old path and new path of the file which
is being renamed/moved.

	modified:   combox/silo.py
	modified:   tests/silo_test.py

2 files changed, 27 insertions, 2 deletions

diff --git a/combox/silo.py b/combox/silo.py
index 1b3eeac..b9ffc13 100644
--- a/combox/silo.py
+++ b/combox/silo.py
@@ -41,7 +41,7 @@ class ComboxSilo(object):
 
         ## things we need for housekeep the node directory.
         self.node_dicts = ['file_created', 'file_modified', 'file_moved',
-                           'file_deleted']
+                           'file_deleted', 'file_moved_info']
 
         # created the dicts if not already created.
         for ndict in self.node_dicts:
@@ -169,6 +169,19 @@ class ComboxSilo(object):
             self.db.dadd(type_, (file_, num))
 
 
+    def node_store_moved_info(self, src_path, dest_path):
+        """
+        Update/create about file move.
+
+        type_: expected type is 'file_moved_info'.
+        src_path: usually the source path of the file being moved.
+        dest_path: usually the destination path of the file being moved.
+        """
+        self.reload()
+        with self.lock:
+            self.db.dadd('file_moved_info', (src_path, dest_path))
+
+
     def node_get(self, type_, file_):
         """
         Returns a number denoting the number of node directories in which the file_'s shard was created/modified/moved/deleted.
diff --git a/tests/silo_test.py b/tests/silo_test.py
index 174dfd5..66de6ba 100644
--- a/tests/silo_test.py
+++ b/tests/silo_test.py
@@ -106,7 +106,7 @@ class TestSilo(object):
         keys = silo.db.db.keys()
 
         node_dicts = ['file_created', 'file_modified', 'file_moved',
-                      'file_deleted']
+                      'file_deleted', 'file_moved_info']
         for ndict in node_dicts:
             assert ndict in keys
 
@@ -202,6 +202,18 @@ class TestSilo(object):
         assert_equal(15, dict_file_deleted[self.LOREM])
 
 
+    def test_csilo_node_store_moved_info(self):
+        """Tests node_store_moved_info method in ComboxSilo class.
+        """
+        silo = ComboxSilo(self.config, self.silo_lock)
+
+        src_path  = self.LOREM
+        dest_path = self.LOREM_IPSUM
+        silo.node_store_moved_info(src_path, dest_path)
+
+        assert_equal(dest_path, silo.node_get('file_moved_info', src_path))
+
+
     def test_csilo_nodeget(self):
         """Tests node_get method in ComboxSilo class
         """