From 02da9b2bb39b7e9c2f5aa988cd4f9709521ae7b0 Mon Sep 17 00:00:00 2001
From: Vitaliy Turov <walleri1@yandex.ru>
Date: Sat, 15 Feb 2025 12:12:21 +0300
Subject: [PATCH] =?UTF-8?q?=D0=A2=D0=B5=D1=81=D1=82=D0=B8=D1=80=D0=BE?=
 =?UTF-8?q?=D0=B2=D0=B0=D0=BD=D0=B8=D0=B5=20bubbletea=20tui=20=D0=B1=D0=B8?=
 =?UTF-8?q?=D0=B1=D0=BB=D0=B8=D0=BE=D1=82=D0=B5=D0=BA=D0=B8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 go/lesson3/cmd/main.go | 77 ++++++++++++++++++++++++++++++++++++++++++
 go/lesson3/go.mod      | 25 ++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 go/lesson3/cmd/main.go

diff --git a/go/lesson3/cmd/main.go b/go/lesson3/cmd/main.go
new file mode 100644
index 0000000..926cabf
--- /dev/null
+++ b/go/lesson3/cmd/main.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/charmbracelet/bubbles/progress"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+const (
+	padding  = 2
+	maxWidth = 80
+)
+
+var helpStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#626262")).Render
+
+func main() {
+	prog := progress.New(progress.WithScaledGradient("#FF7CCB", "#FDFF8C"))
+
+	if _, err := tea.NewProgram(model{progress: prog}).Run(); err != nil {
+		fmt.Println("Oh no!", err)
+		os.Exit(1)
+	}
+}
+
+type tickMsg time.Time
+
+type model struct {
+	percent  float64
+	progress progress.Model
+}
+
+func (m model) Init() tea.Cmd {
+	return tickCmd()
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		return m, tea.Quit
+
+	case tea.WindowSizeMsg:
+		m.progress.Width = msg.Width - padding*2 - 4
+		if m.progress.Width > maxWidth {
+			m.progress.Width = maxWidth
+		}
+		return m, nil
+
+	case tickMsg:
+		m.percent += 0.25
+		if m.percent > 1.0 {
+			m.percent = 1.0
+			return m, tea.Quit
+		}
+		return m, tickCmd()
+
+	default:
+		return m, nil
+	}
+}
+
+func (m model) View() string {
+	pad := strings.Repeat(" ", padding)
+	return "\n" +
+		pad + m.progress.ViewAs(m.percent) + "\n\n" +
+		pad + helpStyle("Press any key to quit")
+}
+
+func tickCmd() tea.Cmd {
+	return tea.Tick(time.Second, func(t time.Time) tea.Msg {
+		return tickMsg(t)
+	})
+}
diff --git a/go/lesson3/go.mod b/go/lesson3/go.mod
index b628e93..be11943 100644
--- a/go/lesson3/go.mod
+++ b/go/lesson3/go.mod
@@ -1,3 +1,28 @@
 module lesson3
 
 go 1.24.0
+
+require (
+	github.com/charmbracelet/bubbles v0.20.0
+	github.com/charmbracelet/bubbletea v1.3.3
+	github.com/charmbracelet/lipgloss v1.0.0
+)
+
+require (
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/harmonica v0.2.0 // indirect
+	github.com/charmbracelet/x/ansi v0.8.0 // indirect
+	github.com/charmbracelet/x/term v0.2.1 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/termenv v0.15.2 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	golang.org/x/sync v0.11.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/text v0.3.8 // indirect
+)