Add existing codebase

pkg/brainbuffer/server/server.go

@@ -0,0 +1,60 @@
+package server
+
+import (
+	apperrors "brainbuffer/pkg/brainbuffer/errors"
+	"brainbuffer/pkg/brainbuffer/task"
+	"github.com/jackc/pgx/v4/pgxpool"
+	"github.com/knadh/koanf"
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
+	"github.com/rs/zerolog/log"
+	"net/http"
+)
+
+func New(conf *koanf.Koanf, pool *pgxpool.Pool) *echo.Echo {
+	server := echo.New()
+
+	server.HTTPErrorHandler = errorHandler(server)
+
+	registerHandlers(server, pool)
+	registerMiddleware(server, conf)
+
+	return server
+}
+
+func registerHandlers(server *echo.Echo, pool *pgxpool.Pool) {
+	task.AddHandlers(server)
+}
+
+func registerMiddleware(server *echo.Echo, conf *koanf.Koanf) {
+	server.Use(middleware.CORS())
+
+	server.Use(Logger())
+
+	server.Use(middleware.JWTWithConfig(middleware.JWTConfig{
+		Skipper: func(ctx echo.Context) bool {
+			return false
+		},
+		SigningMethod: middleware.AlgorithmHS256,
+		SigningKey:    conf.Bytes("jwt.key"),
+	}))
+}
+
+func errorHandler(s *echo.Echo) echo.HTTPErrorHandler {
+	return func(err error, c echo.Context) {
+		mappedErr := err
+
+		switch v := err.(type) {
+		case apperrors.NotFoundError:
+			mappedErr = echo.NewHTTPError(http.StatusNotFound, v.Error())
+		case apperrors.UnknownError:
+			log.Err(v.Err).Send()
+			mappedErr = echo.NewHTTPError(http.StatusInternalServerError)
+		case apperrors.AlreadyExistsError:
+			// TODO: Change status code to hide user identity.
+			mappedErr = echo.NewHTTPError(http.StatusBadRequest, v.Error())
+		}
+
+		s.DefaultHTTPErrorHandler(mappedErr, c)
+	}
+}