Moved backend code into its own subfolder

backend/src/events.rs

@@ -0,0 +1,82 @@
+mod pushover;
+
+use std::time::Duration;
+
+use crate::{device_finders::Device, settings::CONFIG};
+use chrono::Local;
+use duration_string::DurationString;
+use log::{debug, info, warn};
+
+// Private helper function to deliver messages
+fn send_message(body: String) -> Result<(), String> {
+    debug!("About to send notification ({body}).");
+
+    match CONFIG.notifications.method.as_str() {
+        "pushover" => {
+            pushover::send_message(body)?;
+        }
+        other => {
+            warn!("Notification method set to '{other}'. Set logs to 'info' to see notifications.");
+            info!("Notification: {body}");
+        }
+    };
+
+    Ok(())
+}
+
+pub fn trigger_new_device(device: Device) -> Result<(), String> {
+    send_message(format!("New device found in your network: {device}"))?;
+    Ok(())
+}
+
+pub fn trigger_existing_device(existing_device: Device, new_device: Device) -> Result<(), String> {
+    // Notify if the device comes back online after not being seen for the configured period
+    let elapsed_since_last_seen: Duration = (Local::now().naive_local()
+        - existing_device.last_seen)
+        .to_std()
+        .unwrap_or(Duration::from_secs(0));
+
+    if elapsed_since_last_seen >= Duration::from(CONFIG.notifications.notify_when_not_seen_for) {
+        send_message(format!(
+            "Device MAC {} - IP {} - Vendor {} came back online after {}.",
+            new_device.mac_address,
+            new_device.ipv4_address,
+            new_device.vendor,
+            String::from(DurationString::from(Duration::from_secs(
+                elapsed_since_last_seen.as_secs()
+            )))
+        ))?;
+    }
+
+    // Notify if the devices vendor and/or IP changed
+    if (existing_device.ipv4_address != new_device.ipv4_address)
+        && (existing_device.vendor != new_device.vendor)
+    {
+        send_message(format!(
+            "Device with MAC {} changed IP address from {} to {} and vendor from {} to {}.",
+            existing_device.mac_address,
+            existing_device.ipv4_address,
+            new_device.ipv4_address,
+            existing_device.vendor,
+            new_device.vendor
+        ))?;
+    } else if existing_device.ipv4_address != new_device.ipv4_address {
+        send_message(format!(
+            "Device with MAC {} ({}) changed IP address from {} to {}.",
+            existing_device.mac_address,
+            new_device.vendor,
+            existing_device.ipv4_address,
+            new_device.ipv4_address
+        ))?;
+    } else if existing_device.vendor != new_device.vendor {
+        send_message(format!(
+            "Device with MAC {} ({}) changed vendor from {} to {}.",
+            existing_device.mac_address,
+            existing_device.ipv4_address,
+            existing_device.vendor,
+            new_device.vendor
+        ))?;
+    };
+
+    Ok(())
+}