Introduce fabric transport abstraction

agents/rap-node-agent/internal/mesh/fabric_transport.go

@@ -0,0 +1,82 @@
+package mesh
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/example/remote-access-platform/agents/rap-node-agent/internal/fabricproto"
+)
+
+type FabricTransportSession interface {
+	Send(context.Context, fabricproto.Frame) error
+	Frames() <-chan fabricproto.Frame
+	Errors() <-chan error
+	Close() error
+	Closed() bool
+}
+
+type FabricTransport interface {
+	Connect(context.Context, FabricTransportTarget) (FabricTransportSession, error)
+	Close() error
+}
+
+type FabricTransportTarget struct {
+	PeerID         string
+	Endpoint       string
+	Token          string
+	Header         http.Header
+	Timeout        time.Duration
+	MaxPayload     int
+	OutboundBuffer int
+	InboundBuffer  int
+	ErrorBuffer    int
+}
+
+type WebSocketFabricTransport struct {
+	Manager *FabricSessionPeerManager
+}
+
+func NewWebSocketFabricTransport(manager *FabricSessionPeerManager) *WebSocketFabricTransport {
+	if manager == nil {
+		manager = NewFabricSessionPeerManager()
+	}
+	return &WebSocketFabricTransport{Manager: manager}
+}
+
+func (t *WebSocketFabricTransport) Connect(ctx context.Context, target FabricTransportTarget) (FabricTransportSession, error) {
+	manager := t.Manager
+	if manager == nil {
+		manager = NewFabricSessionPeerManager()
+		t.Manager = manager
+	}
+	return manager.Get(ctx, FabricSessionPeerTarget{
+		PeerID:  target.PeerID,
+		BaseURL: target.Endpoint,
+		Options: FabricSessionDialOptions{
+			Token:      target.Token,
+			Header:     target.Header,
+			Timeout:    target.Timeout,
+			MaxPayload: target.MaxPayload,
+		},
+		Pump: FabricSessionPumpOptions{
+			OutboundBuffer: target.OutboundBuffer,
+			InboundBuffer:  target.InboundBuffer,
+			ErrorBuffer:    target.ErrorBuffer,
+		},
+	})
+}
+
+func (t *WebSocketFabricTransport) Close() error {
+	if t == nil || t.Manager == nil {
+		return nil
+	}
+	return t.Manager.Close()
+}
+
+func (t *WebSocketFabricTransport) Snapshot() FabricSessionPeerManagerSnapshot {
+	if t == nil || t.Manager == nil {
+		return FabricSessionPeerManagerSnapshot{SchemaVersion: "rap.fabric_session_peer_manager.v1"}
+	}
+	return t.Manager.Snapshot()
+}