conver midi.message.create into separate processors

internal/processor/midi-control_change-create.go

@@ -0,0 +1,134 @@
+//go:build cgo
+
+package processor
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"strconv"
+	"text/template"
+
+	"github.com/google/jsonschema-go/jsonschema"
+	"github.com/jwetzell/showbridge-go/internal/common"
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"gitlab.com/gomidi/midi/v2"
+)
+
+type MIDIControlChangeCreate struct {
+	config  config.ProcessorConfig
+	Channel *template.Template
+	Control *template.Template
+	Value   *template.Template
+}
+
+func (mccc *MIDIControlChangeCreate) Process(ctx context.Context, wrappedPayload common.WrappedPayload) (common.WrappedPayload, error) {
+	templateData := wrappedPayload
+
+	var channelBuffer bytes.Buffer
+	err := mccc.Channel.Execute(&channelBuffer, templateData)
+
+	if err != nil {
+		wrappedPayload.End = true
+		return wrappedPayload, err
+	}
+
+	channelValue, err := strconv.ParseUint(channelBuffer.String(), 10, 8)
+
+	var controlBuffer bytes.Buffer
+	err = mccc.Control.Execute(&controlBuffer, templateData)
+
+	if err != nil {
+		wrappedPayload.End = true
+		return wrappedPayload, err
+	}
+
+	controlValue, err := strconv.ParseUint(controlBuffer.String(), 10, 8)
+
+	var valueBuffer bytes.Buffer
+	err = mccc.Value.Execute(&valueBuffer, templateData)
+
+	if err != nil {
+		wrappedPayload.End = true
+		return wrappedPayload, err
+	}
+
+	valueValue, err := strconv.ParseUint(valueBuffer.String(), 10, 8)
+
+	payloadMessage := midi.ControlChange(uint8(channelValue), uint8(controlValue), uint8(valueValue))
+	wrappedPayload.Payload = payloadMessage
+	return wrappedPayload, nil
+}
+
+func (mccc *MIDIControlChangeCreate) Type() string {
+	return mccc.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type:  "midi.control_change.create",
+		Title: "Create MIDI Control Change Message",
+		ParamsSchema: &jsonschema.Schema{
+			Type: "object",
+			Properties: map[string]*jsonschema.Schema{
+				"channel": {
+					Title: "Channel",
+					Type:  "string",
+				},
+				"control": {
+					Title: "Control",
+					Type:  "string",
+				},
+				"value": {
+					Title: "Value",
+					Type:  "string",
+				},
+			},
+			Required:             []string{"channel", "control", "value"},
+			AdditionalProperties: nil,
+		},
+		New: func(config config.ProcessorConfig) (Processor, error) {
+
+			params := config.Params
+
+			channelString, err := params.GetString("channel")
+			if err != nil {
+				return nil, fmt.Errorf("midi.control_change.create channel error: %w", err)
+			}
+
+			channelTemplate, err := template.New("channel").Parse(channelString)
+
+			if err != nil {
+				return nil, err
+			}
+
+			controlString, err := params.GetString("control")
+			if err != nil {
+				return nil, fmt.Errorf("midi.control_change.create control error: %w", err)
+			}
+
+			controlTemplate, err := template.New("control").Parse(controlString)
+
+			if err != nil {
+				return nil, err
+			}
+
+			valueString, err := params.GetString("value")
+			if err != nil {
+				return nil, fmt.Errorf("midi.control_change.create value error: %w", err)
+			}
+
+			valueTemplate, err := template.New("value").Parse(valueString)
+
+			if err != nil {
+				return nil, err
+			}
+			return &MIDIControlChangeCreate{
+				config:  config,
+				Channel: channelTemplate,
+				Control: controlTemplate,
+				Value:   valueTemplate,
+			}, nil
+		},
+	})
+}