feat: add decryption indicator

cmd/andcli/main.go

@@ -13,6 +13,7 @@ import (
 	"github.com/tjblackheart/andcli/v2/internal/config"
 	"github.com/tjblackheart/andcli/v2/internal/input"
 	"github.com/tjblackheart/andcli/v2/internal/model"
+	"github.com/tjblackheart/andcli/v2/internal/spinner"
 	"github.com/tjblackheart/andcli/v2/internal/vaults"
 
 	_ "github.com/tjblackheart/andcli/v2/internal/vaults/aegis"
@@ -77,6 +78,10 @@ func open(cfg *config.Config) (vaults.Vault, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), cfg.DecryptionTimeoutD())
 	defer cancel()
 
+	s := spinner.Brew.SetSuffix("Decrypting ...")
+	s.Start()
+	defer s.Stop()
+
 	return vaults.Open(ctx, cfg.File, pw, cfg.Type)
 }
 

internal/spinner/option.go

@@ -0,0 +1,38 @@
+package spinner
+
+import (
+	"io"
+	"time"
+)
+
+type Option func(*Spinner)
+
+func WithFrames(frames []string) Option {
+	return func(s *Spinner) {
+		s.Frames = frames
+	}
+}
+
+func WithFPS(fps time.Duration) Option {
+	return func(s *Spinner) {
+		s.FPS = fps
+	}
+}
+
+func WithWriter(w io.Writer) Option {
+	return func(s *Spinner) {
+		s.writer = w
+	}
+}
+
+func WithColor(c Color) Option {
+	return func(s *Spinner) {
+		s.Color = c
+	}
+}
+
+func WithSuffix(val string) Option {
+	return func(s *Spinner) {
+		s.Suffix = val
+	}
+}

internal/spinner/spinner.go

@@ -0,0 +1,110 @@
+package spinner
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"time"
+)
+
+type Spinner struct {
+	Frames   []string
+	FPS      time.Duration
+	Color    Color
+	Suffix   string
+	stopChan chan struct{}
+	writer   io.Writer
+}
+
+type Color string
+
+func (c Color) String() string { return string(c) }
+
+var (
+	// taken from https://github.com/charmbracelet/bubbles/blob/v1.0.0/spinner/spinner.go
+	Line    = Spinner{Frames: []string{"|", "/", "-", "\\"}, FPS: time.Second / 10}
+	Dot     = Spinner{Frames: []string{"⣾ ", "⣽ ", "⣻ ", "⢿ ", "⡿ ", "⣟ ", "⣯ ", "⣷ "}, FPS: time.Second / 10}
+	MiniDot = Spinner{Frames: []string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}, FPS: time.Second / 12}
+	Jump    = Spinner{Frames: []string{"⢄", "⢂", "⢁", "⡁", "⡈", "⡐", "⡠"}, FPS: time.Second / 10}
+
+	// taken from https://github.com/Homebrew/brew/blob/fb33e11256bb5dc850803cf9e53a7a011f7fe64f/Library/Homebrew/download_queue.rb#L425
+	Brew = Spinner{Frames: []string{"⠙", "⠚", "⠞", "⠖", "⠦", "⠴", "⠲", "⠳", "⠓"}, FPS: time.Second / 12}
+
+	Default = Line
+
+	// colors
+	Reset   Color = "\033[0m"
+	Red     Color = "\033[31m"
+	Green   Color = "\033[32m"
+	Yellow  Color = "\033[33m"
+	Blue    Color = "\033[34m"
+	Magenta Color = "\033[35m"
+	Cyan    Color = "\033[36m"
+	Gray    Color = "\033[37m"
+	White   Color = "\033[97m"
+)
+
+func New(opts ...Option) *Spinner {
+	s := Default
+	s.Color = White
+	s.stopChan = make(chan struct{}, 1)
+	s.writer = os.Stderr
+
+	for _, opt := range opts {
+		opt(&s)
+	}
+
+	return &s
+}
+
+func (s *Spinner) Start() {
+	if s.stopChan == nil {
+		s.stopChan = make(chan struct{}, 1)
+	}
+
+	if s.writer == nil {
+		s.writer = os.Stderr
+	}
+
+	if s.Color == "" {
+		s.Color = White
+	}
+
+	go func() {
+		for {
+			for _, frame := range s.Frames {
+				fmt.Fprintf(s.writer, "%s%s%s %s", s.Color, frame, Reset, s.Suffix)
+				time.Sleep(s.FPS)
+				fmt.Fprintf(s.writer, "\r")
+
+				select {
+				case <-s.stopChan:
+					return
+				default:
+				}
+			}
+		}
+	}()
+}
+
+func (s *Spinner) ClearLine(appends ...rune) {
+	fmt.Fprintf(s.writer, "\033[2K\r")
+	for _, r := range appends {
+		fmt.Fprintf(s.writer, "%c", r)
+	}
+}
+
+func (s *Spinner) Stop() {
+	s.stopChan <- struct{}{}
+	s.ClearLine()
+}
+
+func (s *Spinner) SetColor(c Color) *Spinner {
+	s.Color = c
+	return s
+}
+
+func (s *Spinner) SetSuffix(val string) *Spinner {
+	s.Suffix = val
+	return s
+}