From 76dcc305f39d0a1ce884ac4e388e53d855917a5e Mon Sep 17 00:00:00 2001
From: Curtis McEnroe <programble@gmail.com>
Date: Mon, 21 Dec 2015 22:16:29 -0500
Subject: [PATCH] Add expiring token lifetime

---
 src/token/expiring.rs | 23 +++++++++++++++++++++++
 src/token/mod.rs      |  5 ++++-
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 src/token/expiring.rs

diff --git a/src/token/expiring.rs b/src/token/expiring.rs
new file mode 100644
index 0000000..4c2ae45
--- /dev/null
+++ b/src/token/expiring.rs
@@ -0,0 +1,23 @@
+use chrono::{DateTime, UTC};
+
+use super::Lifetime;
+
+/// An expiring token.
+pub struct Expiring {
+    refresh_token: String,
+    expires: DateTime<UTC>,
+}
+
+impl Expiring {
+    /// Returns the refresh token.
+    ///
+    /// See [RFC 6749, section 1.5](http://tools.ietf.org/html/rfc6749#section-1.5).
+    pub fn refresh_token(&self) -> &str { &self.refresh_token }
+
+    /// Returns the expiry time of the access token.
+    pub fn expires(&self) -> &DateTime<UTC> { &self.expires }
+}
+
+impl Lifetime for Expiring {
+    fn expired(&self) -> bool { self.expires < UTC::now() }
+}
diff --git a/src/token/mod.rs b/src/token/mod.rs
index fe89d50..5952333 100644
--- a/src/token/mod.rs
+++ b/src/token/mod.rs
@@ -23,7 +23,7 @@ pub trait Token<L: Lifetime> {
 
 /// OAuth 2.0 token lifetimes.
 pub trait Lifetime {
-    /// Returns true if the token is no longer valid.
+    /// Returns true if the access token is no longer valid.
     fn expired(&self) -> bool;
 }
 
@@ -32,3 +32,6 @@ mod bearer;
 
 pub use self::statik::Static;
 mod statik;
+
+pub use self::expiring::Expiring;
+mod expiring;