X-Git-Url: https://gerrit.akraino.org/r/gitweb?a=blobdiff_plain;f=src%2Ffoundation%2Fapi%2Frevel%2Fbefore_after_filter.go;fp=src%2Ffoundation%2Fapi%2Frevel%2Fbefore_after_filter.go;h=e9af1d3f5b56b4cf36f92a9a449675f5f5f6a39e;hb=1d1ee6961c93781e1187d8c7faa868da6b2f01f4;hp=0000000000000000000000000000000000000000;hpb=56dd5e0f2164b37b40ac1daa188ccc618b4cbd19;p=iec.git

diff --git a/src/foundation/api/revel/before_after_filter.go b/src/foundation/api/revel/before_after_filter.go
new file mode 100644
index 0000000..e9af1d3
--- /dev/null
+++ b/src/foundation/api/revel/before_after_filter.go
@@ -0,0 +1,60 @@
+package revel
+
+import (
+	"reflect"
+)
+
+// Autocalls any defined before and after methods on the target controller
+// If either calls returns a value then the result is returned
+func BeforeAfterFilter(c *Controller, fc []Filter) {
+	defer func() {
+		if resultValue := beforeAfterFilterInvoke(FINALLY, c); resultValue != nil && !resultValue.IsNil() {
+			c.Result = resultValue.Interface().(Result)
+		}
+	}()
+	defer func() {
+		if err := recover(); err != nil {
+			if resultValue := beforeAfterFilterInvoke(PANIC, c); resultValue != nil && !resultValue.IsNil() {
+				c.Result = resultValue.Interface().(Result)
+			}
+			panic(err)
+		}
+	}()
+	if resultValue := beforeAfterFilterInvoke(BEFORE, c); resultValue != nil && !resultValue.IsNil() {
+		c.Result = resultValue.Interface().(Result)
+	}
+	fc[0](c, fc[1:])
+	if resultValue := beforeAfterFilterInvoke(AFTER, c); resultValue != nil && !resultValue.IsNil() {
+		c.Result = resultValue.Interface().(Result)
+	}
+}
+
+func beforeAfterFilterInvoke(method When, c *Controller) (r *reflect.Value) {
+
+	if c.Type == nil {
+		return
+	}
+	var index []*ControllerFieldPath
+	switch method {
+	case BEFORE:
+		index = c.Type.ControllerEvents.Before
+	case AFTER:
+		index = c.Type.ControllerEvents.After
+	case FINALLY:
+		index = c.Type.ControllerEvents.Finally
+	case PANIC:
+		index = c.Type.ControllerEvents.Panic
+	}
+
+	if len(index) == 0 {
+		return
+	}
+	for _, function := range index {
+		result := function.Invoke(reflect.ValueOf(c.AppController), nil)[0]
+		if !result.IsNil() {
+			return &result
+		}
+	}
+
+	return
+}