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server.go
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server.go
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package grpc
import (
"context"
"errors"
"fmt"
v1 "github.com/alexfalkowski/konfig/api/konfig/v1"
"github.com/alexfalkowski/konfig/server/config"
source "github.com/alexfalkowski/konfig/source/configurator"
kerrors "github.com/alexfalkowski/konfig/source/configurator/errors"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// ServerParams for gRPC.
type ServerParams struct {
Configurator source.Configurator
Transformer *config.Transformer
}
// NewServer for gRPC.
func NewServer(params ServerParams) v1.ServiceServer {
return &Server{conf: params.Configurator, trans: params.Transformer}
}
// Server for gRPC.
type Server struct {
conf source.Configurator
trans *config.Transformer
v1.UnimplementedServiceServer
}
// GetConfig for gRPC.
func (s *Server) GetConfig(ctx context.Context, req *v1.GetConfigRequest) (*v1.GetConfigResponse, error) {
if req.Continent == "" {
req.Continent = "*"
}
if req.Country == "" {
req.Country = "*"
}
resp := &v1.GetConfigResponse{
Config: &v1.Config{
Application: req.Application,
Version: req.Version,
Environment: req.Environment,
Continent: req.Continent,
Country: req.Country,
Command: req.Command,
ContentType: "application/yaml",
},
}
if err := s.validateGetConfigRequest(req); err != nil {
return resp, err
}
data, err := s.conf.GetConfig(ctx, req.Application, req.Version, req.Environment, req.Continent, req.Country, req.Command)
if err != nil {
if errors.Is(err, kerrors.ErrNotFound) {
msg := fmt.Sprintf("%s/%s/%s/%s/%s/%s was not found", req.Application, req.Version, req.Environment, req.Continent, req.Country, req.Command)
return resp, status.Error(codes.NotFound, msg)
}
return resp, status.Error(codes.Internal, "could get config")
}
data, err = s.trans.Transform(ctx, data)
if err != nil {
return resp, status.Error(codes.Internal, "could not transform")
}
resp.Config.Data = data
return resp, nil
}
func (s *Server) validateGetConfigRequest(req *v1.GetConfigRequest) error {
if req.Application == "" {
return status.Error(codes.InvalidArgument, "invalid application")
}
if req.Version == "" {
return status.Error(codes.InvalidArgument, "invalid version")
}
if req.Environment == "" {
return status.Error(codes.InvalidArgument, "invalid environment")
}
if req.Command == "" {
return status.Error(codes.InvalidArgument, "invalid command")
}
return nil
}