enhanced device database structure, added methods to device db module

and unit tests

backend/src/model/devices.rs

@@ -9,14 +9,48 @@ pub struct Device {
     pub vendor: String,
     #[serde(with = "ts_seconds")]
     pub last_seen: DateTime<Utc>,
+    pub is_registered: bool,
+    pub owner: String,
+    pub device_type: String,
+}
+
+impl Device {
+    pub fn new(
+        mac_address: String,
+        ipv4_address: String,
+        vendor: String,
+        last_seen: DateTime<Utc>,
+    ) -> Self {
+        Self {
+            mac_address: mac_address,
+            ipv4_address: ipv4_address,
+            vendor: vendor,
+            last_seen: last_seen,
+            is_registered: false,
+            owner: "".to_string(),
+            device_type: "".to_string(),
+        }
+    }
 }
 
 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
+            "mac={}, ip={}, vendor={}, last_seen={}, is_registered={}, owner={}, device_type={}",
+            self.mac_address,
+            self.ipv4_address,
+            self.vendor,
+            self.last_seen,
+            self.is_registered,
+            self.owner,
+            self.device_type
         )
     }
 }
+
+impl PartialEq for Device {
+    fn eq(&self, other: &Self) -> bool {
+        self.mac_address == other.mac_address
+    }
+}