1 files changed, 93 insertions, 0 deletions
diff --git a/src/network.rs b/src/network.rs
new file mode 100644
index 0000000..3697e29
--- /dev/null
+++ b/src/network.rs
@@ -0,0 +1,93 @@
+use crate::error::{AppError, AppResult};
+use network_interface::{NetworkInterface, NetworkInterfaceConfig};
+use std::fmt;
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct NetworkAdapter {
+    pub name: String,
+    pub is_up: bool,
+    pub is_loopback: bool,
+}
+
+impl fmt::Display for NetworkAdapter {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.name)
+    }
+}
+
+impl From<NetworkInterface> for NetworkAdapter {
+    fn from(interface: NetworkInterface) -> Self {
+        let is_loopback = interface.name.to_lowercase().contains("lo");
+        let is_up = !interface.addr.is_empty();
+
+        Self {
+            name: interface.name,
+            is_up,
+            is_loopback,
+        }
+    }
+}
+
+pub fn get_network_adapters() -> AppResult<Vec<NetworkAdapter>> {
+    NetworkInterface::show()
+        .map_err(AppError::NetworkInterfaceError)
+        .map(|interfaces| interfaces.into_iter().map(NetworkAdapter::from).collect())
+}
+
+pub fn get_active_network_adapters() -> AppResult<Vec<NetworkAdapter>> {
+    get_network_adapters().map(|adapters| {
+        adapters
+            .into_iter()
+            .filter(|adapter| adapter.is_up && !adapter.is_loopback)
+            .collect()
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::test;
+
+    test! {
+        fn test_get_network_adapters() {
+            let adapters = get_network_adapters()?;
+
+            assert!(!adapters.is_empty(), "No network adapters found");
+
+            for adapter in &adapters {
+                assert!(!adapter.name.is_empty(), "Found adapter with empty name");
+            }
+
+            let up_adapters = adapters.iter().filter(|a| a.is_up).count();
+            assert!(up_adapters > 0, "No adapters are up");
+
+            let non_loopback = adapters.iter().filter(|a| !a.is_loopback).count();
+            assert!(non_loopback > 0, "All adapters are loopback interfaces");
+        }
+    }
+
+    test! {
+        fn test_get_active_network_adapters() {
+            let adapters = get_active_network_adapters()?;
+
+            assert!(!adapters.is_empty(), "No active network adapters found");
+
+            for adapter in &adapters {
+                assert!(adapter.is_up, "Found inactive adapter: {}", adapter.name);
+                assert!(!adapter.is_loopback, "Found loopback adapter: {}", adapter.name);
+            }
+        }
+    }
+
+    test! {
+        fn test_network_adapter_display() {
+            let adapter = NetworkAdapter {
+                name: "eth0".to_string(),
+                is_up: true,
+                is_loopback: false,
+            };
+
+            assert_eq!(format!("{}", adapter), "eth0");
+        }
+    }
+}