packrat-tui 0.3.2

A Wireshark-style terminal packet analyzer, reverse engineering, and security research tool with live capture, IDS, port scanner, packet crafter, and PCAP replay
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use ratatui::{
    Frame,
    layout::{Constraint, Direction, Layout, Rect},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, List, ListItem, Paragraph},
};

use crate::app::App;
use crate::ui::theme::*;

pub fn draw(f: &mut Frame, app: &App, area: Rect) {
    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(10), // banner
            Constraint::Length(2),  // header
            Constraint::Min(0),     // list
            Constraint::Length(1),  // hint
        ])
        .split(area);

    draw_banner(f, chunks[0]);
    draw_header(f, chunks[1]);
    draw_list(f, app, chunks[2]);
    draw_hint(f, chunks[3]);
}

fn draw_banner(f: &mut Frame, area: Rect) {
    let bold = Modifier::BOLD;
    let banner = vec![
        Line::raw(""),
        Line::from(vec![
            Span::styled("        ", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled("        ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("        ", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled(" __    ", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled("        ", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled("        ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("  __   ", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::from(vec![
            Span::styled("______  ", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled("_____   ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("  ____  ", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled("|  | __", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled("_______ ", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled("_____   ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("_/  |_ ", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::from(vec![
            Span::styled("\\____ \\ ", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled("\\__  \\  ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("_/ ___\\ ", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled("|  |/ /", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled("\\_  __ \\", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled("\\__  \\  ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("\\   __\\", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::from(vec![
            Span::styled("|  |_> >", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled(" / __ \\_", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("\\  \\___ ", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled("|    < ", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled(" |  | \\/", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled(" / __ \\_", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled(" |  |  ", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::from(vec![
            Span::styled("|   __/ ", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled("(____  /", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled(" \\___  >", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled("|__|_ \\", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled(" |__|   ", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled("(____  /", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled(" |__|  ", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::from(vec![
            Span::styled("|__|    ", Style::default().fg(Color::LightMagenta).add_modifier(bold)),
            Span::styled("     \\/ ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("     \\/ ", Style::default().fg(Color::LightCyan).add_modifier(bold)),
            Span::styled("     \\/", Style::default().fg(Color::Yellow).add_modifier(bold)),
            Span::styled("        ", Style::default().fg(Color::LightRed).add_modifier(bold)),
            Span::styled("     \\/ ", Style::default().fg(Color::LightGreen).add_modifier(bold)),
            Span::styled("       ", Style::default().fg(Color::LightBlue).add_modifier(bold)),
        ]),
        Line::raw(""),
        Line::from(vec![Span::styled("  packet analyzer  v0.2.0", Style::default().fg(C_FG3))]),
    ];
    f.render_widget(Paragraph::new(banner).style(Style::default().bg(C_BG)), area);
}

fn draw_header(f: &mut Frame, area: Rect) {
    let header = Paragraph::new(Line::from(vec![
        Span::styled("  Select network interface", Style::default().fg(C_CYAN).add_modifier(Modifier::BOLD)),
        Span::styled("  ─────────────────────────────────", Style::default().fg(C_BORDER)),
    ])).style(Style::default().bg(C_BG));
    f.render_widget(header, area);
}

fn draw_list(f: &mut Frame, app: &App, area: Rect) {
    let items: Vec<ListItem> = app.iface_list.iter().enumerate().map(|(i, name)| {
        let is_sel = i == app.iface_sel;
        let label = if name == "simulated" {
            format!("  {}  (built-in, no root required)", name)
        } else {
            format!("  {}", name)
        };
        if is_sel {
            ListItem::new(label)
                .style(Style::default().fg(Color::Black).bg(C_CYAN).add_modifier(Modifier::BOLD))
        } else {
            ListItem::new(label).style(Style::default().fg(C_FG2).bg(C_BG))
        }
    }).collect();

    let list = List::new(items)
        .block(Block::default()
            .borders(Borders::LEFT)
            .border_style(Style::default().fg(C_BORDER)))
        .style(Style::default().bg(C_BG));
    f.render_widget(list, area);
}

fn draw_hint(f: &mut Frame, area: Rect) {
    let hint = Line::from(vec![
        Span::styled("  j/k", Style::default().fg(C_YELLOW).add_modifier(Modifier::BOLD)),
        Span::styled(" navigate   ", Style::default().fg(C_FG3)),
        Span::styled("Space/Enter", Style::default().fg(C_GREEN).add_modifier(Modifier::BOLD)),
        Span::styled(" start capture   ", Style::default().fg(C_FG3)),
        Span::styled("q", Style::default().fg(C_RED).add_modifier(Modifier::BOLD)),
        Span::styled(" quit", Style::default().fg(C_FG3)),
    ]);
    f.render_widget(Paragraph::new(hint).style(Style::default().bg(C_BG2)), area);
}