split midi.client into input/output

internal/module/midi-ouptut.go

@@ -0,0 +1,89 @@
+//go:build cgo
+
+package module
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"github.com/jwetzell/showbridge-go/internal/route"
+	"gitlab.com/gomidi/midi/v2"
+	_ "gitlab.com/gomidi/midi/v2/drivers/rtmididrv"
+)
+
+type MIDIOutput struct {
+	config   config.ModuleConfig
+	ctx      context.Context
+	router   route.RouteIO
+	Port     string
+	SendFunc func(midi.Message) error
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		//TODO(jwetzell): find a better namespace than "misc"
+		Type: "midi.output",
+		New: func(ctx context.Context, config config.ModuleConfig, router route.RouteIO) (Module, error) {
+			params := config.Params
+
+			port, ok := params["port"]
+
+			if !ok {
+				return nil, fmt.Errorf("midi.output requires a port parameter")
+			}
+
+			portString, ok := port.(string)
+
+			if !ok {
+				return nil, fmt.Errorf("midi.output port must be a string")
+			}
+
+			return &MIDIOutput{config: config, Port: portString, ctx: ctx, router: router}, nil
+		},
+	})
+}
+
+func (mc *MIDIOutput) Id() string {
+	return mc.config.Id
+}
+
+func (mc *MIDIOutput) Type() string {
+	return mc.config.Type
+}
+
+func (mc *MIDIOutput) Run() error {
+	defer midi.CloseDriver()
+
+	out, err := midi.FindOutPort(mc.Port)
+
+	if err != nil {
+		return fmt.Errorf("midi.output can't find output port: %s", mc.Port)
+	}
+
+	send, err := midi.SendTo(out)
+	if err != nil {
+		return err
+	}
+
+	mc.SendFunc = send
+
+	<-mc.ctx.Done()
+	slog.Debug("router context done in module", "id", mc.Id())
+	return nil
+}
+
+func (mc *MIDIOutput) Output(payload any) error {
+	if mc.SendFunc == nil {
+		return fmt.Errorf("midi.output output is not setup")
+	}
+
+	payloadMessage, ok := payload.(midi.Message)
+
+	if !ok {
+		return fmt.Errorf("midi.output can only ouptut midi.Message")
+	}
+
+	return mc.SendFunc(payloadMessage)
+}