1 files changed, 65 insertions, 0 deletions
diff --git a/src/status.rs b/src/status.rs
new file mode 100644
index 0000000..247023c
--- /dev/null
+++ b/src/status.rs
@@ -0,0 +1,65 @@
+/// Represent the status of a step in a roadmap.
+///
+/// The unknown status allows the user to not specify the status, and
+/// the roadmap to infer it from the structure of the graph. For
+/// example, a step is inferred to be blocked if any of it
+/// dependencies are not finished.
+
+#[derive(Clone,Debug,PartialEq)]
+pub enum Status {
+    Unknown,
+    Goal,
+    Finished,
+    Ready,
+    Next,
+    Blocked,
+}
+
+impl Status {
+    pub fn from_text(text: &str) -> Option<Status> {
+        match text {
+            "" => Some(Status::Unknown),
+            "goal" => Some(Status::Goal),
+            "finished" => Some(Status::Finished),
+            "ready" => Some(Status::Ready),
+            "next" => Some(Status::Next),
+            "blocked" => Some(Status::Blocked),
+            _ => None,
+        }
+    }
+}
+
+impl PartialEq<Status> for &Status {
+    fn eq(&self, other: &Status) -> bool {
+        **self == *other
+    }
+}
+
+impl PartialEq<&Status> for Status {
+    fn eq(&self, other: &&Status) -> bool {
+        **other == *self
+    }
+}
+
+
+#[cfg(test)]
+mod test {
+    use super::Status;
+
+    #[test]
+    fn happy_from_text() {
+        assert_eq!(Status::from_text("").unwrap(), Status::Unknown);
+        assert_eq!(Status::from_text("goal").unwrap(), Status::Goal);
+        assert_eq!(Status::from_text("finished").unwrap(), Status::Finished);
+        assert_eq!(Status::from_text("ready").unwrap(), Status::Ready);
+        assert_eq!(Status::from_text("next").unwrap(), Status::Next);
+        assert_eq!(Status::from_text("blocked").unwrap(), Status::Blocked);
+    }
+
+
+    #[test]
+    fn sad_from_text() {
+        let x = Status::from_text("x");
+        assert_eq!(x, None);
+    }    
+}