forked from lxh/go-wxhelper
144 lines
3.6 KiB
Go
144 lines
3.6 KiB
Go
package plugin
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import (
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"go-wechat/model"
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)
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// MessageHandler 消息处理函数
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type MessageHandler func(msg *model.Message)
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// MessageDispatcher 消息分发处理接口
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// 跟 DispatchMessage 结合封装成 MessageHandler
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type MessageDispatcher interface {
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Dispatch(msg *model.Message)
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}
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// DispatchMessage 跟 MessageDispatcher 结合封装成 MessageHandler
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func DispatchMessage(dispatcher MessageDispatcher) func(msg *model.Message) {
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return func(msg *model.Message) { dispatcher.Dispatch(msg) }
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}
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// MessageDispatcher impl
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// MessageContextHandler 消息处理函数
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type MessageContextHandler func(ctx *MessageContext)
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type MessageContextHandlerGroup []MessageContextHandler
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// MessageContext 消息处理上下文对象
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type MessageContext struct {
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index int
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abortIndex int
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messageHandlers MessageContextHandlerGroup
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*model.Message
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}
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// Next 主动调用下一个消息处理函数(或开始调用)
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func (c *MessageContext) Next() {
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c.index++
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for c.index <= len(c.messageHandlers) {
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if c.IsAbort() {
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return
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}
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handle := c.messageHandlers[c.index-1]
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handle(c)
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c.index++
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}
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}
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// IsAbort 判断是否被中断
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func (c *MessageContext) IsAbort() bool {
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return c.abortIndex > 0
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}
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// Abort 中断当前消息处理, 不会调用下一个消息处理函数, 但是不会中断当前的处理函数
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func (c *MessageContext) Abort() {
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c.abortIndex = c.index
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}
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// AbortHandler 获取当前中断的消息处理函数
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func (c *MessageContext) AbortHandler() MessageContextHandler {
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if c.abortIndex > 0 {
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return c.messageHandlers[c.abortIndex-1]
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}
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return nil
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}
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// MatchFunc 消息匹配函数,返回为true则表示匹配
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type MatchFunc func(*model.Message) bool
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// MatchFuncList 将多个MatchFunc封装成一个MatchFunc
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func MatchFuncList(matchFuncs ...MatchFunc) MatchFunc {
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return func(message *model.Message) bool {
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for _, matchFunc := range matchFuncs {
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if !matchFunc(message) {
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return false
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}
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}
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return true
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}
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}
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type matchNode struct {
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matchFunc MatchFunc
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group MessageContextHandlerGroup
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}
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type matchNodes []*matchNode
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// MessageMatchDispatcher impl MessageDispatcher interface
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//
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// dispatcher := NewMessageMatchDispatcher()
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// dispatcher.OnText(func(msg *model.Message){
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// msg.ReplyText("hello")
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// })
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// bot := DefaultBot()
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// bot.MessageHandler = DispatchMessage(dispatcher)
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type MessageMatchDispatcher struct {
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async bool
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matchNodes matchNodes
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}
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// NewMessageMatchDispatcher Constructor
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func NewMessageMatchDispatcher() *MessageMatchDispatcher {
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return &MessageMatchDispatcher{}
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}
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// SetAsync 设置是否异步处理
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func (m *MessageMatchDispatcher) SetAsync(async bool) {
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m.async = async
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}
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// Dispatch impl MessageDispatcher
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// 遍历 MessageMatchDispatcher 所有的消息处理函数
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// 获取所有匹配上的函数
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// 执行处理的消息处理方法
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func (m *MessageMatchDispatcher) Dispatch(msg *model.Message) {
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var group MessageContextHandlerGroup
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for _, node := range m.matchNodes {
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if node.matchFunc(msg) {
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group = append(group, node.group...)
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}
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}
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ctx := &MessageContext{Message: msg, messageHandlers: group}
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if m.async {
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go m.do(ctx)
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} else {
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m.do(ctx)
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}
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}
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func (m *MessageMatchDispatcher) do(ctx *MessageContext) {
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ctx.Next()
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}
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// RegisterHandler 注册消息处理函数, 根据自己的需求自定义
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// matchFunc返回true则表示处理对应的handlers
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func (m *MessageMatchDispatcher) RegisterHandler(matchFunc MatchFunc, handlers ...MessageContextHandler) {
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if matchFunc == nil {
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panic("MatchFunc can not be nil")
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}
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node := &matchNode{matchFunc: matchFunc, group: handlers}
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m.matchNodes = append(m.matchNodes, node)
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}
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