feat: apis for validate and create peer

flow/cmd/handler.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/PeerDB-io/peer-flow/connectors"
 	"github.com/PeerDB-io/peer-flow/generated/protos"
 	"github.com/PeerDB-io/peer-flow/shared"
 	peerflow "github.com/PeerDB-io/peer-flow/workflows"
@@ -275,3 +276,99 @@ func (h *FlowRequestHandler) ListPeers(
 		Peers: peers,
 	}, nil
 }
+
+func (h *FlowRequestHandler) ValidatePeer(
+	ctx context.Context,
+	req *protos.ValidatePeerRequest,
+) (*protos.ValidatePeerResponse, error) {
+	if req.Peer == nil {
+		return &protos.ValidatePeerResponse{
+			Status:  protos.ValidatePeerStatus_INVALID,
+			Message: "no peer provided",
+		}, nil
+	}
+
+	if len(req.Peer.Name) == 0 {
+		return &protos.ValidatePeerResponse{
+			Status:  protos.ValidatePeerStatus_INVALID,
+			Message: "no peer name provided",
+		}, nil
+	}
+
+	conn, err := connectors.GetConnector(ctx, req.Peer)
+	if err != nil {
+		return &protos.ValidatePeerResponse{
+			Status:  protos.ValidatePeerStatus_INVALID,
+			Message: fmt.Sprintf("invalid peer: %s", err),
+		}, nil
+	}
+
+	status := conn.ConnectionActive()
+	if !status {
+		return &protos.ValidatePeerResponse{
+			Status:  protos.ValidatePeerStatus_INVALID,
+			Message: fmt.Sprintf("failed to establish connection to peer: %s", err),
+		}, nil
+	}
+
+	return &protos.ValidatePeerResponse{
+		Status:  protos.ValidatePeerStatus_VALID,
+		Message: "valid peer",
+	}, nil
+}
+
+func (h *FlowRequestHandler) CreatePeer(
+	ctx context.Context,
+	req *protos.CreatePeerRequest,
+) (*protos.CreatePeerResponse, error) {
+	status, validateErr := h.ValidatePeer(ctx, &protos.ValidatePeerRequest{Peer: req.Peer})
+	if validateErr != nil {
+		return nil, validateErr
+	}
+	if status.Status != protos.ValidatePeerStatus_VALID {
+		return &protos.CreatePeerResponse{
+			Status:  protos.CreatePeerStatus_FAILED,
+			Message: status.Message,
+		}, nil
+	}
+
+	config := req.Peer.Config
+	wrongConfigResponse := &protos.CreatePeerResponse{
+		Status:  protos.CreatePeerStatus_FAILED,
+		Message: "wrong config for connector",
+	}
+	var encodedConfig []byte
+	var encodingErr error
+	peerType := req.Peer.Type
+	switch peerType {
+	case protos.DBType_POSTGRES:
+		pgConfig := config.(*protos.Peer_PostgresConfig).PostgresConfig
+		encodedConfig, encodingErr = proto.Marshal(pgConfig)
+
+	case protos.DBType_SNOWFLAKE:
+		sfConfig := config.(*protos.Peer_SnowflakeConfig).SnowflakeConfig
+		encodedConfig, encodingErr = proto.Marshal(sfConfig)
+
+	default:
+		return wrongConfigResponse, nil
+	}
+	if encodingErr != nil {
+		log.Errorf("failed to encode peer config: %v", encodingErr)
+		return nil, encodingErr
+	}
+
+	_, err := h.pool.Exec(ctx, "INSERT INTO peers (name, type, options) VALUES ($1, $2, $3)",
+		req.Peer.Name, peerType, encodedConfig,
+	)
+	if err != nil {
+		return &protos.CreatePeerResponse{
+			Status:  protos.CreatePeerStatus_FAILED,
+			Message: err.Error(),
+		}, nil
+	}
+
+	return &protos.CreatePeerResponse{
+		Status:  protos.CreatePeerStatus_CREATED,
+		Message: "",
+	}, nil
+}

flow/connectors/core.go

@@ -15,6 +15,7 @@ import (
 )
 
 var ErrUnsupportedFunctionality = errors.New("requested connector does not support functionality")
+var ErrWrongConfig = errors.New("wrong config for connector")
 
 type Connector interface {
 	Close() error
@@ -190,6 +191,39 @@ func GetQRepSyncConnector(ctx context.Context, config *protos.Peer) (QRepSyncCon
 	}
 }
 
+func GetConnector(ctx context.Context, config *protos.Peer) (Connector, error) {
+	inner := config.Type
+	switch inner {
+	case protos.DBType_POSTGRES:
+		pgConfig := config.GetPostgresConfig()
+		if pgConfig == nil {
+			return nil, ErrWrongConfig
+		}
+		return connpostgres.NewPostgresConnector(ctx, pgConfig)
+	case protos.DBType_BIGQUERY:
+		bqConfig := config.GetBigqueryConfig()
+		if bqConfig == nil {
+			return nil, ErrWrongConfig
+		}
+		return connbigquery.NewBigQueryConnector(ctx, bqConfig)
+
+	case protos.DBType_SNOWFLAKE:
+		sfConfig := config.GetSnowflakeConfig()
+		if sfConfig == nil {
+			return nil, ErrWrongConfig
+		}
+		return connsnowflake.NewSnowflakeConnector(ctx, sfConfig)
+	// case protos.DBType_S3:
+	// 	return conns3.NewS3Connector(ctx, config.GetS3Config())
+	// case protos.DBType_EVENTHUB:
+	// 	return connsqlserver.NewSQLServerConnector(ctx, config.GetSqlserverConfig())
+	// case protos.DBType_SQLSERVER:
+	// 	return conneventhub.NewEventHubConnector(ctx, config.GetEventhubConfig())
+	default:
+		return nil, ErrUnsupportedFunctionality
+	}
+}
+
 func GetQRepConsolidateConnector(ctx context.Context,
 	config *protos.Peer) (QRepConsolidateConnector, error) {
 	inner := config.Config