split wrap protocol parsing into input.button

src/device/input/button/plaintext.go

@@ -0,0 +1,38 @@
+package button
+
+import (
+	"mayhem-party/src/device/input/raw"
+	"os"
+)
+
+type Plaintext struct {
+	src raw.Raw
+}
+
+func NewPlaintext(src raw.Raw) Plaintext {
+	return Plaintext{src: src}
+}
+
+func (p Plaintext) Close() { p.src.Close() }
+
+func (p Plaintext) Read() []Button {
+	releaseChar := byte('!')
+	if v := os.Getenv("BUTTON_PLAINTEXT_RELEASE"); v != "" {
+		releaseChar = byte(v[0])
+	}
+
+	b := p.src.Read()
+	buttons := make([]Button, 0, len(b))
+	down := true
+	for i := range b {
+		if b[i] == releaseChar {
+			down = false
+		} else {
+			if b[i] != '\n' {
+				buttons = append(buttons, Button{Char: b[i], Down: down})
+			}
+			down = true
+		}
+	}
+	return buttons
+}