Implement DAG for flow

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

src/models/flow.rs

@@ -31,3 +31,18 @@ pub enum FlowStatus {
     Error,
     Finished,
 }
+
+impl Flow {
+    pub fn id(&self) -> u32 {
+        self.id
+    }
+    pub fn caller_id(&self) -> u32 {
+        self.caller_id
+    }
+    pub fn context_id(&self) -> u32 {
+        self.context_id
+    }
+    pub fn jobs(&self) -> &Vec<u32> {
+        &self.jobs
+    }
+}