Periodically verify the status of messages sent over mycelium

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

src/models/message.rs

@@ -22,6 +22,12 @@ pub struct Message {
     pub timeout_ack: u32,
     /// Seconds for the receiver to send us a reply
     pub timeout_result: u32,
+
+    /// Outbound transport id returned by Mycelium on push
+    pub transport_id: Option<String>,
+    /// Latest transport status as reported by Mycelium
+    pub transport_status: Option<TransportStatus>,
+
     pub job: Vec<Job>,
     pub logs: Vec<Log>,
     pub created_at: Timestamp,
@@ -44,6 +50,15 @@ pub enum MessageStatus {
     Processed,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub enum TransportStatus {
+    Queued,
+    Sent,
+    Delivered,
+    Read,
+    Failed,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum MessageFormatType {
     Html,