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filter.go
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/
filter.go
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package message
import "github.com/Mrs4s/MiraiGo/message"
// 筛选指定的消息
func Filter(r *MessageBuilder, fn ...func(*message.IMessageElement) bool) *MessageBuilder { // todo:用pipeline改写
var m = &MessageBuilder{}
for _, elem := range r.Elems {
var st = true
for _, f := range fn {
st = st && f(&elem)
if st != false {
break
}
}
if st {
m.Elems = append(m.Elems, elem)
}
}
return m
}
func FirstMatched(r *MessageBuilder, fn ...func(element *message.IMessageElement) bool) *message.IMessageElement {
for _, elem := range r.Elems {
var st = true
for _, f := range fn {
st = st && f(&elem)
if st != false {
break
}
}
if st {
return &elem
}
}
return nil
}
func Foreach(r *MessageBuilder, fn ...func(element message.IMessageElement) message.IMessageElement) *MessageBuilder {
var m = &MessageBuilder{}
for _, elem := range r.Elems {
for _, f := range fn {
m.Elems = append(m.Elems, f(elem))
}
}
return m
}