split UI from event handling

Signed-off-by: Alex Goodman <wagoodman@gmail.com>

internal/ui/common/event_handlers.go

@@ -1,8 +1,15 @@
 package common
 
 import (
+	"context"
 	"fmt"
+	"io"
 	"os"
+	"sync"
+
+	"github.com/anchore/syft/internal"
+	"github.com/gookit/color"
+	"github.com/wagoodman/jotframe/pkg/frame"
 
 	syftEventParsers "github.com/anchore/syft/syft/event/parsers"
 	"github.com/wagoodman/go-partybus"
@@ -22,3 +29,21 @@ func CatalogerPresenterReady(event partybus.Event) error {
 	}
 	return nil
 }
+
+// appUpdateAvailableHandler is a UI handler function to display a new application version to the top of the screen.
+func AppUpdateAvailableHandler(_ context.Context, fr *frame.Frame, event partybus.Event, _ *sync.WaitGroup) error {
+	newVersion, err := syftEventParsers.ParseAppUpdateAvailable(event)
+	if err != nil {
+		return fmt.Errorf("bad AppUpdateAvailable event: %w", err)
+	}
+
+	line, err := fr.Prepend()
+	if err != nil {
+		return err
+	}
+
+	message := color.Magenta.Sprintf("New version of %s is available: %s", internal.ApplicationName, newVersion)
+	_, _ = io.WriteString(line, message)
+
+	return nil
+}

internal/ui/common/spinner.go

@@ -8,33 +8,9 @@ import (
 // TODO: move me to a common module (used in multiple repos)
 
 const (
-	SpinnerCircleOutlineSet = "◜◠◯◎◉●◉◎◯◡◞"
-	SpinnerCircleSet        = "◌◯◎◉●◉◎◯"
-	SpinnerDotSet           = "⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏"
-	SpinnerHorizontalBarSet = "▉▊▋▌▍▎▏▎▍▌▋▊▉"
-	SpinnerVerticalBarSet   = "▁▃▄▅▆▇█▇▆▅▄▃▁"
-	SpinnerDoubleBarSet     = "▁▂▃▄▅▆▇█▉▊▋▌▍▎▏▏▎▍▌▋▊▉█▇▆▅▄▃▂▁"
-	SpinnerArrowSet         = "←↖↑↗→↘↓↙"
+	SpinnerDotSet = "⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏"
 )
 
-var SpinnerCircleDotSet = []string{
-	"⠈⠁",
-	"⠈⠑",
-	"⠈⠱",
-	"⠈⡱",
-	"⢀⡱",
-	"⢄⡱",
-	"⢄⡱",
-	"⢆⡱",
-	"⢎⡱",
-	"⢎⡰",
-	"⢎⡠",
-	"⢎⡀",
-	"⢎⠁",
-	"⠎⠁",
-	"⠊⠁",
-}
-
 type Spinner struct {
 	index   int
 	charset []string
@@ -47,12 +23,6 @@ func NewSpinner(charset string) Spinner {
 	}
 }
 
-func NewSpinnerFromSlice(charset []string) Spinner {
-	return Spinner{
-		charset: charset,
-	}
-}
-
 func (s *Spinner) Current() string {
 	s.lock.Lock()
 	defer s.lock.Unlock()