feat: implemented /users/{id} api route

modules/backend/handlers/users.go

@@ -0,0 +1,51 @@
+package handlers
+
+import (
+	"context"
+	oapi "nyanimedb/api"
+	sqlc "nyanimedb/sql"
+	"strconv"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/oapi-codegen/runtime/types"
+)
+
+type Server struct {
+	db *sqlc.Queries
+}
+
+func NewServer(db *sqlc.Queries) Server {
+	return Server{db: db}
+}
+
+func parseInt64(s string) (int32, error) {
+	i, err := strconv.ParseInt(s, 10, 64)
+	return int32(i), err
+}
+
+func mapUser(u sqlc.GetUserByIDRow) oapi.User {
+	return oapi.User{
+		AvatarId:     u.AvatarID,
+		CreationDate: u.CreationDate,
+		DispName:     u.DispName,
+		Id:           &u.ID,
+		Mail:         (*types.Email)(u.Mail),
+		Nickname:     u.Nickname,
+		UserDesc:     u.UserDesc,
+	}
+}
+
+func (s Server) GetUsersUserId(ctx context.Context, req oapi.GetUsersUserIdRequestObject) (oapi.GetUsersUserIdResponseObject, error) {
+	userID, err := parseInt64(req.UserId)
+	if err != nil {
+		return oapi.GetUsersUserId404Response{}, nil
+	}
+	user, err := s.db.GetUserByID(context.TODO(), int64(userID))
+	if err != nil {
+		if err == pgx.ErrNoRows {
+			return oapi.GetUsersUserId404Response{}, nil
+		}
+		return nil, err
+	}
+	return oapi.GetUsersUserId200JSONResponse(mapUser(user)), nil
+}