🚧 Fade in menu

app/fade.go

@@ -0,0 +1,71 @@
+package app
+
+import (
+	"os"
+	"strconv"
+
+	"codeberg.org/danjones000/strip-beats/media"
+	"github.com/rivo/tview"
+)
+
+func validateNumber(input string, lastChar rune) bool {
+	num, err := strconv.ParseFloat(input, 64)
+	if err != nil {
+		return false
+	}
+
+	if num < 0 {
+		return false
+	}
+
+	if file == nil {
+		return true
+	}
+
+	st := file.WantedAudioStream()
+	if st == nil {
+		return true
+	}
+
+	return num <= st.Duration
+}
+
+func fadeFile() error {
+	tmp, err := os.CreateTemp("", "audio.*.mka")
+	if err != nil {
+		return err
+	}
+	tmp.Close()
+
+	var start, stop, up, down float64
+
+	cont := tview.NewApplication()
+	form := tview.NewForm().
+		AddInputField("Beginning time?", "0", 0, validateNumber, func(input string) {
+			start, _ = strconv.ParseFloat(input, 64)
+		}).
+		AddInputField("Ending time? (leave 0 for full time)", "0", 0, validateNumber, func(input string) {
+			stop, _ = strconv.ParseFloat(input, 64)
+		}).
+		AddInputField("Fade in duration?", "0", 0, validateNumber, func(input string) {
+			up, _ = strconv.ParseFloat(input, 64)
+		}).
+		AddInputField("Fade out duration?", "0", 0, validateNumber, func(input string) {
+			down, _ = strconv.ParseFloat(input, 64)
+		}).
+		AddButton("Start", func() {
+			cont.Stop()
+		})
+
+	form.SetBorder(true).SetTitleAlign(tview.AlignLeft)
+	if err := cont.SetRoot(form, true).EnableMouse(true).Run(); err != nil {
+		return err
+	}
+
+	err = media.TrimWithFade(*file, tmp.Name(), start, stop, up, down)
+	if err != nil {
+		return err
+	}
+	SetTmpFile(tmp.Name())
+	return nil
+}