WIP: Add RepositoryExt trait

2 files changed, 47 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index bda0996..f900dd0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,3 +7,4 @@
 pub mod id;
 pub mod node;
 pub mod repository;
+pub mod repository_ext;
diff --git a/src/repository_ext.rs b/src/repository_ext.rs
new file mode 100644
index 0000000..f45256a
--- /dev/null
+++ b/src/repository_ext.rs
@@ -0,0 +1,46 @@
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+
+use std::fmt::Debug;
+
+use crate::node;
+use crate::id;
+use crate::repository::Repository;
+
+use futures::future::Future;
+use futures::stream::Stream;
+use futures::stream;
+
+///
+pub trait RepositoryExt : Repository {
+    fn log(&self, head: Self::Id) -> Box<Stream<Item = Self::Node, Error = Self::Error>>;
+}
+
+impl<R
+    , Error
+    , Id
+    , Node
+    >
+    RepositoryExt for R
+    where
+        Error: Debug,
+        Id:    id::Id,
+        Node:  node::Node<Id = Id, Error = Error>,
+
+        R: Repository<
+            Id = Id,
+            Node = Node,
+            Error = Error,
+        >,
+{
+    fn log(&self, head: Self::Id) -> Box<Stream<Item = Self::Node, Error = Self::Error>> {
+        unimplemented!()
+
+            // not so easy.
+    }
+}
+
+