mirror of
https://github.com/diamondburned/arikawa.git
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44 lines
775 B
Go
44 lines
775 B
Go
package session
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import (
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"errors"
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"reflect"
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)
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type handler struct {
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event reflect.Type
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callback reflect.Value
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}
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func reflectFn(function interface{}) (*handler, error) {
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fnV := reflect.ValueOf(function)
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fnT := fnV.Type()
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if fnT.Kind() != reflect.Func {
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return nil, errors.New("given interface is not a function")
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}
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if fnT.NumIn() != 1 {
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return nil, errors.New("function can only accept 1 event as argument")
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}
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argT := fnT.In(0)
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if argT.Kind() != reflect.Ptr {
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return nil, errors.New("first argument is not pointer")
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}
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return &handler{
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event: argT,
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callback: fnV,
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}, nil
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}
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func (h handler) not(event reflect.Type) bool {
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return h.event != event
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}
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func (h handler) call(event reflect.Value) {
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h.callback.Call([]reflect.Value{event})
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}
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