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use ::std::collections::HashMap;
use ::std::fmt;
use ::tui::backend::Backend;
use ::tui::layout::{Constraint, Direction, Layout, Rect};
use ::tui::style::{Color, Style};
use ::tui::terminal::Frame;
use ::tui::widgets::{Block, Borders, Row, Table, Widget};
use ::tui::Terminal;
use crate::display::{Bandwidth, UIState};
use crate::network::{Connection, Utilization};
use ::std::net::Ipv4Addr;
struct DisplayBandwidth(f64);
impl fmt::Display for DisplayBandwidth {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.0 > 999_999_999.0 {
write!(f, "{:.2}GBps", self.0 / 1_000_000_000.0)
} else if self.0 > 999_999.0 {
write!(f, "{:.2}MBps", self.0 / 1_000_000.0)
} else if self.0 > 999.0 {
write!(f, "{:.2}KBps", self.0 / 1000.0)
} else {
write!(f, "{}Bps", self.0)
}
}
}
fn display_ip_or_host(ip: Ipv4Addr, ip_to_host: &HashMap<Ipv4Addr, String>) -> String {
match ip_to_host.get(&ip) {
Some(host) => host.clone(),
None => ip.to_string(),
}
}
fn create_table<'a>(
title: &'a str,
column_names: &'a [&'a str],
rows: impl Iterator<Item = Vec<String>> + 'a,
widths: &'a [u16],
) -> impl Widget + 'a {
let table_rows =
rows.map(|row| Row::StyledData(row.into_iter(), Style::default().fg(Color::White)));
Table::new(column_names.iter(), table_rows)
.block(Block::default().title(title).borders(Borders::ALL))
.header_style(Style::default().fg(Color::Yellow))
.widths(widths)
.style(Style::default().fg(Color::White))
.column_spacing(1)
}
fn format_row_data(
first_cell: String,
second_cell: String,
bandwidth: &impl Bandwidth,
) -> Vec<String> {
vec![
first_cell,
second_cell,
format!(
"{}/{}",
DisplayBandwidth(bandwidth.get_total_bytes_uploaded() as f64),
DisplayBandwidth(bandwidth.get_total_bytes_downloaded() as f64)
),
]
}
fn split(direction: Direction, rect: Rect) -> Vec<Rect> {
Layout::default()
.direction(direction)
.margin(0)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(rect)
}
fn render_process_table(state: &UIState, frame: &mut Frame<impl Backend>, rect: Rect) {
let rows = state
.processes
.iter()
.map(|(process_name, data_for_process)| {
format_row_data(
process_name.to_string(),
data_for_process.connection_count.to_string(),
data_for_process,
)
});
let mut table = create_table(
"Utilization by process name",
&["Process", "Connection Count", "Total Bytes"],
rows,
&[30, 30, 30],
);
table.render(frame, rect);
}
fn render_connections_table(
state: &UIState,
frame: &mut Frame<impl Backend>,
rect: Rect,
ip_to_host: &HashMap<Ipv4Addr, String>,
) {
let rows = state
.connections
.iter()
.map(|(connection, connection_data)| {
let connection_string = format!(
"{}:{} => {}:{} ({})",
display_ip_or_host(connection.local_socket.ip, ip_to_host),
connection.local_socket.port,
display_ip_or_host(connection.remote_socket.ip, ip_to_host),
connection.remote_socket.port,
connection.protocol,
);
format_row_data(
connection_string,
connection_data.process_name.to_string(),
connection_data,
)
});
let mut table = create_table(
"Utilization by connection",
&["Connection", "Processes", "Total Bytes Up/Down"],
rows,
&[50, 20, 20],
);
table.render(frame, rect);
}
fn render_remote_ip_table(
state: &UIState,
frame: &mut Frame<impl Backend>,
rect: Rect,
ip_to_host: &HashMap<Ipv4Addr, String>,
) {
let rows = state
.remote_ips
.iter()
.map(|(remote_ip, data_for_remote_ip)| {
let remote_ip = display_ip_or_host(*remote_ip, &ip_to_host);
format_row_data(
remote_ip,
data_for_remote_ip.connection_count.to_string(),
data_for_remote_ip,
)
});
let mut table = create_table(
"Utilization by remote ip",
&["Remote Address", "Connection Count", "Total Bytes"],
rows,
&[50, 20, 20],
);
table.render(frame, rect);
}
pub struct Ui<B>
where
B: Backend,
{
terminal: Terminal<B>,
state: UIState,
ip_to_host: HashMap<Ipv4Addr, String>,
}
impl<B> Ui<B>
where
B: Backend,
{
pub fn new(terminal_backend: B) -> Self {
let mut terminal = Terminal::new(terminal_backend).unwrap();
terminal.clear().unwrap();
terminal.hide_cursor().unwrap();
Ui {
terminal,
state: Default::default(),
ip_to_host: Default::default(),
}
}
pub fn draw(&mut self) {
let state = &self.state;
let ip_to_host = &self.ip_to_host;
self.terminal
.draw(|mut f| {
let screen_horizontal_halves = split(Direction::Horizontal, f.size());
let right_side_vertical_halves =
split(Direction::Vertical, screen_horizontal_halves[1]);
render_connections_table(state, &mut f, screen_horizontal_halves[0], ip_to_host);
render_process_table(state, &mut f, right_side_vertical_halves[0]);
render_remote_ip_table(state, &mut f, right_side_vertical_halves[1], ip_to_host);
})
.unwrap();
}
pub fn update_state(
&mut self,
connections_to_procs: HashMap<Connection, String>,
utilization: Utilization,
ip_to_host: HashMap<Ipv4Addr, String>,
) {
self.state = UIState::new(connections_to_procs, utilization);
self.ip_to_host = ip_to_host;
}
pub fn end(&mut self) {
// TODO: destroy?
self.terminal.clear().unwrap();
self.terminal.show_cursor().unwrap();
}
}
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