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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)
return
}
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
}
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