Moved Devices to a models module

backend/src/model/devices.rs

@@ -0,0 +1,22 @@
+use chrono::{DateTime, Utc, serde::ts_seconds};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+
+#[derive(Clone, Serialize, Deserialize)]
+pub struct Device {
+    pub mac_address: String,
+    pub ipv4_address: String,
+    pub vendor: String,
+    #[serde(with = "ts_seconds")]
+    pub last_seen: DateTime<Utc>,
+}
+
+impl fmt::Display for Device {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "mac={}, ip={}, vendor={}, last_seen={}",
+            self.mac_address, self.ipv4_address, self.vendor, self.last_seen
+        )
+    }
+}