stage 0 database schema ready

backend/server/login.go

@@ -1 +1,206 @@
 package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/textinput"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+// ============================================================================
+// STYLING DEFINITIONS (Lipgloss)
+// ============================================================================
+var (
+	focusedStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("205")).Bold(true)
+	blurredStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("240"))
+	cursorStyle  = focusedStyle.Copy()
+	noStyle      = lipgloss.NewStyle()
+
+	// A nice box around the login screen
+	dialogBoxStyle = lipgloss.NewStyle().
+			Border(lipgloss.RoundedBorder()).
+			BorderForeground(lipgloss.Color("87")).
+			Padding(1, 4).
+			MarginTop(1).
+			MarginLeft(2)
+)
+
+// ============================================================================
+// 1. THE MODEL
+// ============================================================================
+type loginModel struct {
+	focusIndex int
+	inputs     []textinput.Model
+	cursorMode textinput.CursorMode
+
+	// Flags to return back to the main application
+	isSubmitted  bool
+	isCanceled   bool
+	errorMessage string
+}
+
+func initialModell() loginModel {
+	m := loginModel{
+		inputs: make([]textinput.Model, 2),
+	}
+
+	var t textinput.Model
+	for i := range m.inputs {
+		t = textinput.New()
+		t.Cursor.Style = cursorStyle
+		t.CharLimit = 32
+
+		switch i {
+		case 0:
+			t.Placeholder = "Username"
+			t.Focus()
+			t.PromptStyle = focusedStyle
+			t.TextStyle = focusedStyle
+		case 1:
+			t.Placeholder = "Password"
+			t.EchoMode = textinput.EchoPassword // Masks the password with *
+			t.EchoCharacter = '•'
+		}
+
+		m.inputs[i] = t
+	}
+
+	return m
+}
+
+// ============================================================================
+// 2. THE INIT FUNCTION (Runs once on startup)
+// ============================================================================
+func (m loginModel) Init() tea.Cmd {
+	return textinput.Blink
+}
+
+// ============================================================================
+// 3. THE UPDATE FUNCTION (Handles keypresses)
+// ============================================================================
+func (m loginModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "ctrl+c", "esc":
+			m.isCanceled = true
+			return m, tea.Quit
+
+		// Handle switching between username and password fields
+		case "tab", "shift+tab", "enter", "up", "down":
+			s := msg.String()
+
+			// If they press Enter on the password field, submit the form
+			if s == "enter" && m.focusIndex == len(m.inputs)-1 {
+				m.isSubmitted = true
+				return m, tea.Quit
+			}
+
+			// Cycle through inputs
+			if s == "up" || s == "shift+tab" {
+				m.focusIndex--
+			} else {
+				m.focusIndex++
+			}
+
+			if m.focusIndex > len(m.inputs)-1 {
+				m.focusIndex = 0
+			} else if m.focusIndex < 0 {
+				m.focusIndex = len(m.inputs) - 1
+			}
+
+			// Apply focus states
+			cmds := make([]tea.Cmd, len(m.inputs))
+			for i := 0; i <= len(m.inputs)-1; i++ {
+				if i == m.focusIndex {
+					cmds[i] = m.inputs[i].Focus()
+					m.inputs[i].PromptStyle = focusedStyle
+					m.inputs[i].TextStyle = focusedStyle
+					continue
+				}
+				m.inputs[i].Blur()
+				m.inputs[i].PromptStyle = noStyle
+				m.inputs[i].TextStyle = noStyle
+			}
+
+			return m, tea.Batch(cmds...)
+		}
+	}
+
+	// Handle character inputs and blinking
+	cmd := m.updateInputs(msg)
+	return m, cmd
+}
+
+func (m *loginModel) updateInputs(msg tea.Msg) tea.Cmd {
+	cmds := make([]tea.Cmd, len(m.inputs))
+	for i := range m.inputs {
+		m.inputs[i], cmds[i] = m.inputs[i].Update(msg)
+	}
+	return tea.Batch(cmds...)
+}
+
+// ============================================================================
+// 4. THE VIEW FUNCTION (Renders the UI)
+// ============================================================================
+func (m loginModel) View() string {
+	// Build the UI string
+	var b strings.Builder
+
+	b.WriteString(lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("78")).Render("✈️  SKYRAMA TERMINAL LOGIN\n\n"))
+
+	for i := range m.inputs {
+		b.WriteString(m.inputs[i].View())
+		if i < len(m.inputs)-1 {
+			b.WriteRune('\n')
+		}
+	}
+
+	button := &lipgloss.Style{}
+	if m.focusIndex == len(m.inputs) {
+		button = &focusedStyle
+	} else {
+		button = &blurredStyle
+	}
+
+	b.WriteString("\n")
+	if m.errorMessage != "" {
+		b.WriteString(lipgloss.NewStyle().Foreground(lipgloss.Color("9")).Render("⚠️ " + m.errorMessage + "\n"))
+	} else {
+		b.WriteString("\n")
+	}
+	b.WriteString(button.Render("[ Submit ]"))
+	b.WriteString(blurredStyle.Render("\n\n(esc to quit)"))
+
+	// Wrap the whole thing in our dialog box
+	return dialogBoxStyle.Render(b.String()) + "\n"
+}
+
+// ============================================================================
+// THE WRAPPER FUNCTION (Call this from your app)
+// ============================================================================
+// RunLoginScreen starts the TUI and returns the username, password, and a boolean
+// indicating if the user completed the form (true) or pressed escape (false).
+func RunLoginScreen() (username string, password string, submitted bool) {
+
+	p := tea.NewProgram(initialModell())
+
+	// Run the Bubble Tea program synchronously
+	finalModel, err := p.Run()
+	if err != nil {
+		fmt.Printf("Error running login screen: %v", err)
+		os.Exit(1)
+	}
+
+	// Cast the returned tea.Model back into our specific loginModel
+	if m, ok := finalModel.(loginModel); ok {
+		if m.isSubmitted {
+			return m.inputs[0].Value(), m.inputs[1].Value(), true
+		}
+	}
+
+	return "", "", false
+}