restore: reorganize progress bar code

The structure is now much more similar to that of the backup command.

internal/ui/restore/text.go

@@ -0,0 +1,47 @@
+package restore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/restic/restic/internal/ui"
+)
+
+type textPrinter struct {
+	terminal term
+}
+
+func NewTextPrinter(terminal term) ProgressPrinter {
+	return &textPrinter{
+		terminal: terminal,
+	}
+}
+
+func (t *textPrinter) Update(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+	timeLeft := ui.FormatDuration(duration)
+	formattedAllBytesWritten := ui.FormatBytes(allBytesWritten)
+	formattedAllBytesTotal := ui.FormatBytes(allBytesTotal)
+	allPercent := ui.FormatPercent(allBytesWritten, allBytesTotal)
+	progress := fmt.Sprintf("[%s] %s  %v files %s, total %v files %v",
+		timeLeft, allPercent, filesFinished, formattedAllBytesWritten, filesTotal, formattedAllBytesTotal)
+
+	t.terminal.SetStatus([]string{progress})
+}
+
+func (t *textPrinter) Finish(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+	t.terminal.SetStatus([]string{})
+
+	timeLeft := ui.FormatDuration(duration)
+	formattedAllBytesTotal := ui.FormatBytes(allBytesTotal)
+
+	var summary string
+	if filesFinished == filesTotal && allBytesWritten == allBytesTotal {
+		summary = fmt.Sprintf("Summary: Restored %d Files (%s) in %s", filesTotal, formattedAllBytesTotal, timeLeft)
+	} else {
+		formattedAllBytesWritten := ui.FormatBytes(allBytesWritten)
+		summary = fmt.Sprintf("Summary: Restored %d / %d Files (%s / %s) in %s",
+			filesFinished, filesTotal, formattedAllBytesWritten, formattedAllBytesTotal, timeLeft)
+	}
+
+	t.terminal.Print(summary)
+}