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package middleware
import (
"context"
"errors"
"fmt"
"net/http"
"strings"
"github.com/LMBishop/confplanner/api/dto"
"github.com/LMBishop/confplanner/pkg/session"
"github.com/LMBishop/confplanner/pkg/user"
)
func MustAuthenticate(service user.Service, store session.Service) func(http.HandlerFunc) http.HandlerFunc {
return func(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
authHeader := r.Header.Get("Authorization")
token, err := extractBearerToken(authHeader)
if err != nil {
dto.WriteDto(w, r, &dto.ErrorResponse{
Code: http.StatusUnauthorized,
Message: "Unauthorized",
})
return
}
s := store.GetByToken(token)
if s == nil {
dto.WriteDto(w, r, &dto.ErrorResponse{
Code: http.StatusUnauthorized,
Message: "Unauthorized",
})
return
}
u, err := service.GetUserByID(s.UserID)
if err != nil {
if errors.Is(err, user.ErrUserNotFound) {
store.Destroy(s.SessionID)
dto.WriteDto(w, r, &dto.ErrorResponse{
Code: http.StatusForbidden,
Message: "Invalid session",
})
return
}
return
}
s.Username = u.Username
s.Admin = u.Admin
ctx := context.WithValue(r.Context(), "session", s)
next(w, r.WithContext(ctx))
}
}
}
func extractBearerToken(header string) (string, error) {
const prefix = "Bearer "
if header == "" {
return "", fmt.Errorf("authorization header missing")
}
if !strings.HasPrefix(header, prefix) {
return "", fmt.Errorf("invalid authorization scheme")
}
token := strings.TrimSpace(header[len(prefix):])
if token == "" {
return "", fmt.Errorf("token is empty")
}
return token, nil
}
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