Add AllNetworkSpeedWidget to show any usage on enp devices

src/widgets/network.rs

@@ -1,16 +1,18 @@
-use i3monkit::Block;
-use i3monkit::{Widget, WidgetUpdate};
+use std::{
+    collections::vec_deque::VecDeque,
+    fs::File,
+    io::{BufRead, BufReader, Error, ErrorKind, Result},
+    path::PathBuf,
+    time::SystemTime,
+};
 
-use std::collections::vec_deque::VecDeque;
-use std::fs::File;
-use std::io::{BufRead, BufReader, Error, ErrorKind, Result};
-use std::path::PathBuf;
-use std::time::SystemTime;
+use i3monkit::{Block, Widget, WidgetUpdate};
 
 use crate::spark;
 
 const NETWORK_PATH_PREFIX: &str = "/sys/class/net";
 const NETWORK_STAT_SUFFIX: &str = "statistics/dummy";
+const DEVICE_PREFIX: &str = "enp";
 
 struct TransferStat {
     rx: u64,
@@ -94,6 +96,12 @@ impl NetworkSpeedWidget {
         }
     }
 
+    fn is_active(&self) -> bool {
+        self.last_stat.rx > 0
+            || self.last_stat.tx > 0
+            || (self.rx_history.iter().sum::<f32>() + self.tx_history.iter().sum::<f32>()) > 0.
+    }
+
     fn format_rate(rate: f64) -> String {
         if rate.is_nan() {
             return "N/A".to_string();
@@ -129,12 +137,9 @@ impl NetworkSpeedWidget {
 
         Ok((Self::format_rate(rx_rate), Self::format_rate(tx_rate)))
     }
-}
 
-impl Widget for NetworkSpeedWidget {
-    fn update(&mut self) -> Option<WidgetUpdate> {
+    fn render(&mut self) -> Option<String> {
         if let Ok((rx, tx)) = self.get_human_readable_stat() {
-            let mut data = Block::new();
             let (rx_history, tx_history) = if self.rx_history.len() > 1 {
                 let g = spark::Graph {
                     min: None,
@@ -147,11 +152,21 @@ impl Widget for NetworkSpeedWidget {
             } else {
                 ("".to_string(), "".to_string())
             };
-            data.use_pango();
-            data.append_full_text(&format!(
+            return Some(format!(
                 "Rx:<tt>{} {}</tt> Tx:<tt>{} {}</tt>",
                 rx, rx_history, tx, tx_history
             ));
+        }
+        None
+    }
+}
+
+impl Widget for NetworkSpeedWidget {
+    fn update(&mut self) -> Option<WidgetUpdate> {
+        if let Some(text) = self.render() {
+            let mut data = Block::new();
+            data.use_pango();
+            data.append_full_text(&text);
             return Some(WidgetUpdate {
                 refresh_interval: std::time::Duration::new(1, 0),
                 data: Some(data),
@@ -160,3 +175,56 @@ impl Widget for NetworkSpeedWidget {
         None
     }
 }
+
+pub struct AllNetworkSpeedWidget {
+    num_samples: usize,
+    nics: Vec<NetworkSpeedWidget>,
+}
+impl AllNetworkSpeedWidget {
+    pub fn new(num_samples: usize) -> Self {
+        let nics = std::fs::read_dir(NETWORK_PATH_PREFIX)
+            .expect(&format!("couldn't list {NETWORK_PATH_PREFIX}"))
+            .filter_map(|dir| {
+                let d = dir.unwrap();
+                let p = d.file_name();
+                let p = p.to_string_lossy();
+                if p.starts_with(DEVICE_PREFIX) {
+                    Some(NetworkSpeedWidget::new(&p, num_samples))
+                } else {
+                    None
+                }
+            })
+            .collect();
+
+        AllNetworkSpeedWidget { num_samples, nics }
+    }
+}
+
+impl Widget for AllNetworkSpeedWidget {
+    fn update(&mut self) -> Option<WidgetUpdate> {
+        let nics: Vec<_> = self
+            .nics
+            .iter_mut()
+            .filter_map(|nic| {
+                if !nic.is_active() {
+                    return None;
+                }
+                if let Some(text) = nic.render() {
+                    Some(format!("{}: {}", nic.interface, text))
+                } else {
+                    None
+                }
+            })
+            .collect();
+
+        let mut data = Block::new();
+        data.use_pango();
+        nics.iter().for_each(|n| {
+            data.append_full_text(n);
+        });
+        Some(WidgetUpdate {
+            refresh_interval: std::time::Duration::new(1, 0),
+            data: Some(data),
+        })
+    }
+}