[#80] fixed before hooks data and added optional interceptor to upsert submit

forms/base.go

@@ -0,0 +1,19 @@
+// Package models implements various services used for request data
+// validation and applying changes to existing DB models through the app Dao.
+package forms
+
+// InterceptorNextFunc is a interceptor handler function.
+// Usually used in combination with InterceptorFunc.
+type InterceptorNextFunc = func() error
+
+// InterceptorFunc defines a single interceptor function that will execute the provided next func handler.
+type InterceptorFunc func(next InterceptorNextFunc) InterceptorNextFunc
+
+// runInterceptors executes the provided list of interceptors.
+func runInterceptors(next InterceptorNextFunc, interceptors ...InterceptorFunc) error {
+	for i := len(interceptors) - 1; i >= 0; i-- {
+		next = interceptors[i](next)
+	}
+
+	return next()
+}