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event.go
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package nano
import (
"encoding/json"
"reflect"
"strings"
log "github.com/sirupsen/logrus"
)
// Event ...
type Event struct {
// Type is payload.T
Type string
// Seq 序列号
Seq uint32
// Value 是 D
Value any
// value is the reflect value of Value
value reflect.Value
}
// processEvent 处理需要关注的业务事件
func (bot *Bot) processEvent(payload *WebsocketPayload) {
tp := UnderlineToCamel(payload.T)
if bot.Handler != nil {
ev, ok := bot.handlers[tp]
if !ok {
return
}
log.Debugln(getLogHeader(), "使用 handlers 处理", tp, "事件")
x := reflect.New(ev.t)
err := json.Unmarshal(payload.D, x.Interface())
if err != nil {
log.Warnln(getLogHeader(), "解析", tp, "事件时出现错误:", err)
return
}
go ev.h(payload.S, bot, x.UnsafePointer())
return
}
ctx := &Ctx{
Event: Event{
Type: tp,
Seq: payload.S,
},
State: State{},
caller: bot,
}
switch tp {
case "C2cMessageCreate", "GroupAtMessageCreate":
ctx.IsQQ = true
}
switch tp {
case "DirectMessageCreate", "C2cMessageCreate", "GroupAtMessageCreate":
ctx.IsToMe = true
fallthrough
case "MessageCreate", "AtMessageCreate":
tp = "Message"
case "DirectMessageDelete":
ctx.IsToMe = true
fallthrough
case "MessageDelete", "PublicMessageDelete":
tp = "MessageDelete"
}
matcherLock.RLock()
n := len(matcherMap[tp])
if n == 0 {
matcherLock.RUnlock()
return
}
log.Debugln(getLogHeader(), "pass", tp, "event to plugins")
matchers := make([]*Matcher, n)
copy(matchers, matcherMap[tp])
matcherLock.RUnlock()
x := reflect.New(types[ctx.Type])
err := json.Unmarshal(payload.D, x.Interface())
if err != nil {
log.Warnln(getLogHeader(), "解析", ctx.Type, "事件时出现错误:", err)
return
}
ctx.Value = x.Interface()
ctx.value = x
switch tp {
case "Message":
ctx.Message = (*Message)(x.UnsafePointer())
if ctx.Message.MentionEveryone {
ctx.IsToMe = true
}
if ctx.IsQQ {
if ctx.Message.Author.UserOpenID != "" {
ctx.Message.Author.ID = ctx.Message.Author.UserOpenID
} else if ctx.Message.Author.MemberOpenID != "" {
ctx.Message.Author.ID = ctx.Message.Author.MemberOpenID
}
ctx.Message.ChannelID = ctx.Message.GroupOpenID
}
log.Infoln(getLogHeader(), "=>", ctx.Message)
case "MessageDelete":
mdl := (*MessageDelete)(x.UnsafePointer())
opmember, err := ctx.GetGuildMemberOf(mdl.Message.GuildID, mdl.OpUser.ID)
if err != nil {
log.Warnln(getLogHeader(), "获取撤回消息者详情错误:", err)
return
}
ctx.Message = (*MessageDelete)(x.UnsafePointer()).Message
ctx.Message.Member = &Member{
GuildID: mdl.Message.GuildID,
User: ctx.Message.Author,
}
ctx.Message.Author = opmember.User
log.Infoln(getLogHeader(), "x>", mdl)
}
go match(ctx, matchers)
}
func match(ctx *Ctx, matchers []*Matcher) {
if ctx.Message != nil && ctx.Message.Content != "" { // 确保无空
ctx.Message.Content = strings.TrimSpace(ctx.Message.Content)
if !ctx.IsToMe {
ctx.IsToMe = func(ctx *Ctx) bool {
name := ctx.GetReady().User.Username
if strings.HasPrefix(ctx.Message.Content, name) {
log.Debugln(getLogHeader(), "message before process:", ctx.Message.Content)
ctx.Message.Content = strings.TrimLeft(ctx.Message.Content[len(name):], " ")
log.Debugln(getLogHeader(), "message after process:", ctx.Message.Content)
return true
}
atme := ctx.AtMe()
if strings.HasPrefix(ctx.Message.Content, atme) {
log.Debugln(getLogHeader(), "message before process:", ctx.Message.Content)
ctx.Message.Content = strings.TrimLeft(ctx.Message.Content[len(atme):], " ")
log.Debugln(getLogHeader(), "message after process:", ctx.Message.Content)
return true
}
return OnlyPrivate(ctx)
}(ctx)
}
}
log.Debugln(getLogHeader(), "message is to me:", ctx.IsToMe)
loop:
for _, matcher := range matchers {
for k := range ctx.State { // Clear State
delete(ctx.State, k)
}
matcherLock.RLock()
m := matcher.copy()
matcherLock.RUnlock()
ctx.ma = m
// pre handler
if m.Engine != nil {
for _, handler := range m.Engine.preHandler {
if !handler(ctx) { // 有 pre handler 未满足
if m.Break { // 阻断后续
break loop
}
continue loop
}
}
}
for _, rule := range m.Rules {
if rule != nil && !rule(ctx) { // 有 Rule 的条件未满足
if m.Break { // 阻断后续
break loop
}
continue loop
}
}
// mid handler
if m.Engine != nil {
for _, handler := range m.Engine.midHandler {
if !handler(ctx) { // 有 mid handler 未满足
if m.Break { // 阻断后续
break loop
}
continue loop
}
}
}
if m.Process != nil {
m.Process(ctx) // 处理事件
}
if matcher.Temp { // 临时 Matcher 删除
matcher.Delete()
}
if m.Engine != nil {
// post handler
for _, handler := range m.Engine.postHandler {
handler(ctx)
}
}
if m.Block { // 阻断后续
break loop
}
}
}