init

internal/auth/middleware.go

@@ -0,0 +1,54 @@
+package auth
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"github.com/writekitapp/writekit/internal/db"
+)
+
+type ctxKey string
+
+const userIDKey ctxKey = "userID"
+
+func SessionMiddleware(database *db.DB) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			token := extractToken(r)
+			if token == "" {
+				http.Error(w, "unauthorized", http.StatusUnauthorized)
+				return
+			}
+
+			session, err := database.ValidateSession(r.Context(), token)
+			if err != nil || session == nil {
+				http.Error(w, "unauthorized", http.StatusUnauthorized)
+				return
+			}
+
+			ctx := context.WithValue(r.Context(), userIDKey, session.UserID)
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}
+
+func GetUserID(r *http.Request) string {
+	if id, ok := r.Context().Value(userIDKey).(string); ok {
+		return id
+	}
+	return ""
+}
+
+func extractToken(r *http.Request) string {
+	if cookie, err := r.Cookie("writekit_session"); err == nil && cookie.Value != "" {
+		return cookie.Value
+	}
+
+	auth := r.Header.Get("Authorization")
+	if strings.HasPrefix(auth, "Bearer ") {
+		return strings.TrimPrefix(auth, "Bearer ")
+	}
+
+	return r.URL.Query().Get("token")
+}