feat: Initial project structure with TUI, SSH, SIP parser, and capture modules

internal/tui/model.go

@@ -0,0 +1,216 @@
+package tui
+
+import (
+	"fmt"
+	"telephony-inspector/internal/config"
+
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+// View represents the current screen in the TUI
+type View int
+
+const (
+	ViewDashboard View = iota
+	ViewCapture
+	ViewAnalysis
+	ViewNetworkMap
+)
+
+// Model holds the application state
+type Model struct {
+	currentView View
+	width       int
+	height      int
+
+	// Network map configuration
+	networkMap *config.NetworkMap
+
+	// Capture state
+	capturing   bool
+	packetCount int
+	lastPackets []string // Last N packet summaries
+
+	// Style definitions
+	styles Styles
+}
+
+// Styles holds the lipgloss styles for the TUI
+type Styles struct {
+	Title     lipgloss.Style
+	Subtitle  lipgloss.Style
+	Active    lipgloss.Style
+	Inactive  lipgloss.Style
+	Help      lipgloss.Style
+	StatusBar lipgloss.Style
+}
+
+func defaultStyles() Styles {
+	return Styles{
+		Title: lipgloss.NewStyle().
+			Bold(true).
+			Foreground(lipgloss.Color("#7D56F4")).
+			MarginBottom(1),
+		Subtitle: lipgloss.NewStyle().
+			Foreground(lipgloss.Color("#AFAFAF")),
+		Active: lipgloss.NewStyle().
+			Bold(true).
+			Foreground(lipgloss.Color("#04B575")),
+		Inactive: lipgloss.NewStyle().
+			Foreground(lipgloss.Color("#626262")),
+		Help: lipgloss.NewStyle().
+			Foreground(lipgloss.Color("#626262")).
+			MarginTop(1),
+		StatusBar: lipgloss.NewStyle().
+			Background(lipgloss.Color("#7D56F4")).
+			Foreground(lipgloss.Color("#FFFFFF")).
+			Padding(0, 1),
+	}
+}
+
+// NewModel creates a new TUI model with default values
+func NewModel() Model {
+	return Model{
+		currentView: ViewDashboard,
+		networkMap:  config.NewNetworkMap(),
+		lastPackets: make([]string, 0, 20),
+		styles:      defaultStyles(),
+	}
+}
+
+// Init initializes the model
+func (m Model) Init() tea.Cmd {
+	return nil
+}
+
+// Update handles messages and updates the model
+func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "q", "ctrl+c":
+			return m, tea.Quit
+		case "1":
+			m.currentView = ViewDashboard
+		case "2":
+			m.currentView = ViewCapture
+		case "3":
+			m.currentView = ViewAnalysis
+		case "4":
+			m.currentView = ViewNetworkMap
+		}
+
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+	}
+
+	return m, nil
+}
+
+// View renders the TUI
+func (m Model) View() string {
+	var content string
+
+	switch m.currentView {
+	case ViewDashboard:
+		content = m.viewDashboard()
+	case ViewCapture:
+		content = m.viewCapture()
+	case ViewAnalysis:
+		content = m.viewAnalysis()
+	case ViewNetworkMap:
+		content = m.viewNetworkMap()
+	}
+
+	// Navigation bar
+	nav := m.renderNav()
+
+	// Status bar
+	status := m.styles.StatusBar.Render(" Telephony Inspector v0.1.0 ")
+
+	return lipgloss.JoinVertical(lipgloss.Left, nav, content, status)
+}
+
+func (m Model) renderNav() string {
+	tabs := []string{"[1] Dashboard", "[2] Capture", "[3] Analysis", "[4] Network Map"}
+	var rendered []string
+
+	for i, tab := range tabs {
+		if View(i) == m.currentView {
+			rendered = append(rendered, m.styles.Active.Render(tab))
+		} else {
+			rendered = append(rendered, m.styles.Inactive.Render(tab))
+		}
+	}
+
+	return lipgloss.JoinHorizontal(lipgloss.Top, rendered...) + "\n"
+}
+
+func (m Model) viewDashboard() string {
+	title := m.styles.Title.Render("📞 Dashboard")
+
+	info := lipgloss.JoinVertical(lipgloss.Left,
+		m.styles.Subtitle.Render("SIP Telephony Inspector"),
+		"",
+		"• Capture SIP traffic via SSH + tcpdump",
+		"• Analyze SIP/SDP packets in real-time",
+		"• Map network topology for better debugging",
+		"",
+		m.styles.Help.Render("Press 1-4 to navigate, q to quit"),
+	)
+
+	return lipgloss.JoinVertical(lipgloss.Left, title, info)
+}
+
+func (m Model) viewCapture() string {
+	title := m.styles.Title.Render("🔍 Capture")
+
+	status := "Status: "
+	if m.capturing {
+		status += m.styles.Active.Render("● Capturing")
+	} else {
+		status += m.styles.Inactive.Render("○ Stopped")
+	}
+
+	packetInfo := fmt.Sprintf("Packets captured: %d", m.packetCount)
+
+	help := m.styles.Help.Render("[c] Connect SSH  [s] Start/Stop Capture  [q] Quit")
+
+	return lipgloss.JoinVertical(lipgloss.Left, title, status, packetInfo, "", help)
+}
+
+func (m Model) viewAnalysis() string {
+	title := m.styles.Title.Render("📊 Analysis")
+
+	content := lipgloss.JoinVertical(lipgloss.Left,
+		"Call flows will appear here once packets are captured.",
+		"",
+		"Features:",
+		"• Group packets by Call-ID",
+		"• Visualize SIP transaction flow",
+		"• Decode SDP offers/answers",
+	)
+
+	return lipgloss.JoinVertical(lipgloss.Left, title, content)
+}
+
+func (m Model) viewNetworkMap() string {
+	title := m.styles.Title.Render("🗺️ Network Map")
+
+	if len(m.networkMap.Nodes) == 0 {
+		return lipgloss.JoinVertical(lipgloss.Left, title,
+			"No network nodes configured.",
+			"",
+			m.styles.Help.Render("[a] Add node  [l] Load from file"),
+		)
+	}
+
+	var nodes []string
+	for _, node := range m.networkMap.Nodes {
+		nodes = append(nodes, fmt.Sprintf("• %s (%s): %s", node.Name, node.Type, node.IP))
+	}
+
+	return lipgloss.JoinVertical(lipgloss.Left, title, lipgloss.JoinVertical(lipgloss.Left, nodes...))
+}