add json output (#7)

Author: JannikSt

Cargo.lock

@@ -15,6 +15,8 @@ categories = ["command-line-utilities", "network-programming"]
 ratatui = "0.26"
 crossterm = "0.27"
 rand = "0.9.2"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 
 [lints.clippy]
 pedantic = "deny"

Cargo.toml

@@ -9,13 +9,45 @@ use crossterm::{
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };
 use ratatui::{backend::CrosstermBackend, Terminal};
+use std::env;
 use std::io;
 use std::time::{Duration, Instant};
 
 const UI_REFRESH_INTERVAL_MS: u64 = 33;
 const METRICS_UPDATE_INTERVAL_MS: u64 = 250;
 
 fn main() -> Result<(), io::Error> {
+    let args: Vec<String> = env::args().collect();
+    let json_mode = args.contains(&String::from("--json"));
+
+    if json_mode {
+        run_json_mode()
+    } else {
+        run_interactive_mode()
+    }
+}
+
+fn run_json_mode() -> Result<(), io::Error> {
+    let use_fake_data = std::env::var("IBTOP_FAKE_DATA").is_ok();
+
+    let adapters = if use_fake_data {
+        discovery::fake::generate_fake_adapters()
+    } else {
+        let real_adapters = discovery::discover_adapters();
+        if real_adapters.is_empty() && std::env::var("IBTOP_DEMO").is_ok() {
+            discovery::fake::generate_fake_adapters()
+        } else {
+            real_adapters
+        }
+    };
+
+    let json_output = serde_json::to_string_pretty(&adapters)?;
+    println!("{json_output}");
+
+    Ok(())
+}
+
+fn run_interactive_mode() -> Result<(), io::Error> {
     enable_raw_mode()?;
     let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;

src/main.rs

@@ -1,7 +1,8 @@
+use serde::{Deserialize, Serialize};
 use std::fmt::Display;
 use std::str::FromStr;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
 pub(crate) enum PortState {
     Active,
     Down,
@@ -29,21 +30,21 @@ impl FromStr for PortState {
     }
 }
 
-#[derive(Debug)]
+#[derive(Debug, Serialize, Deserialize)]
 pub(crate) struct AdapterInfo {
     pub(crate) name: String,
     pub(crate) ports: Vec<PortInfo>,
 }
 
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Serialize, Deserialize)]
 pub(crate) struct PortInfo {
     pub(crate) port_number: u16,
     pub(crate) state: PortState,
     pub(crate) rate: String,
     pub(crate) counters: PortCounters,
 }
 
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Default, Clone, Serialize, Deserialize)]
 pub(crate) struct PortCounters {
     pub(crate) rx_bytes: u64,
     pub(crate) tx_bytes: u64,