Prepara versao dev 1.0

backend/internal/api/middleware/auth.go

@@ -0,0 +1,53 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"aggios-app/backend/internal/config"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type contextKey string
+
+const UserIDKey contextKey = "userID"
+
+// Auth validates JWT tokens
+func Auth(cfg *config.Config) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			authHeader := r.Header.Get("Authorization")
+			if authHeader == "" {
+				http.Error(w, "Unauthorized", http.StatusUnauthorized)
+				return
+			}
+
+			bearerToken := strings.Split(authHeader, " ")
+			if len(bearerToken) != 2 || bearerToken[0] != "Bearer" {
+				http.Error(w, "Invalid token format", http.StatusUnauthorized)
+				return
+			}
+
+			token, err := jwt.Parse(bearerToken[1], func(token *jwt.Token) (interface{}, error) {
+				return []byte(cfg.JWT.Secret), nil
+			})
+
+			if err != nil || !token.Valid {
+				http.Error(w, "Invalid token", http.StatusUnauthorized)
+				return
+			}
+
+			claims, ok := token.Claims.(jwt.MapClaims)
+			if !ok {
+				http.Error(w, "Invalid token claims", http.StatusUnauthorized)
+				return
+			}
+
+			userID := claims["user_id"].(string)
+			ctx := context.WithValue(r.Context(), UserIDKey, userID)
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}