first commit

backend/internal/auth/middleware.go

@@ -0,0 +1,43 @@
+package auth
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+const ContextClaimsKey = "auth_claims"
+const ContextUserIDKey = "auth_user_id"
+const ContextRoleKey = "auth_role"
+
+func RequireAuth(tokens TokenService) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		header := c.GetHeader("Authorization")
+		if header == "" || !strings.HasPrefix(header, "Bearer ") {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "Autenticacao obrigatoria."})
+			return
+		}
+
+		claims, err := tokens.ParseAccessToken(strings.TrimPrefix(header, "Bearer "))
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "Sessao invalida ou expirada."})
+			return
+		}
+
+		c.Set(ContextClaimsKey, claims)
+		c.Set(ContextUserIDKey, claims.UserID)
+		c.Set(ContextRoleKey, claims.Role)
+		c.Next()
+	}
+}
+
+func ClaimsFromContext(c *gin.Context) (Claims, bool) {
+	value, ok := c.Get(ContextClaimsKey)
+	if !ok {
+		return Claims{}, false
+	}
+
+	claims, ok := value.(Claims)
+	return claims, ok
+}