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plugin.go
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plugin.go
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package gonebot
import (
"fmt"
"reflect"
log "github.com/sirupsen/logrus"
)
func init() {
defaultPluginManager = newPluginManager()
// 添加钩子,Engine创建完毕后,初始化插件
GlobalHooks.EngineCreated(defaultPluginManager.InitPlugins)
}
// 插件管理器,理应是个单例
type pluginManager struct {
plugins map[string]Plugin
pluginConfigStructs map[string]interface{}
}
var defaultPluginManager *pluginManager
func newPluginManager() *pluginManager {
pm := &pluginManager{
plugins: make(map[string]Plugin),
pluginConfigStructs: make(map[string]interface{}),
}
return pm
}
func (pm *pluginManager) RegisterPlugin(plugin Plugin, pluginConfig interface{}) {
if plugin == nil {
panic("插件不能为空")
}
id := getPluginId(plugin)
pm.plugins[id] = plugin
if pluginConfig != nil {
pm.pluginConfigStructs[id] = pluginConfig
}
}
// 初始化插件
func (pm *pluginManager) InitPlugins(engine *Engine) {
cfg := engine.Config.GetBaseConfig()
pluginControlConfig := cfg.Plugin.Enable
for id, plugin := range pm.plugins {
// 仅当配置中指定为禁用的插件才不加载。配置中未指定的插件默认启用
if enabled, ok := pluginControlConfig[id]; ok && !enabled {
continue
}
// 填充插件配置结构体字段
if plgCfgStruct, ok := pm.pluginConfigStructs[id]; ok {
convertConfigMapToStruct(plgCfgStruct, cfg.Plugin.Config[id])
}
log.Debugf("正在初始化插件:%s", id)
hub := newPluginHub(engine)
hub.plugin = plugin
log.Debugf("正在为插件%s运行PluginWillLoad钩子", id)
GlobalHooks.firePluginHook(pluginLifecycleHook_PluginWillLoad, &hub)
plugin.Init(&hub)
log.Debugf("正在为插件%s运行PluginLoaded钩子", id)
GlobalHooks.firePluginHook(pluginLifecycleHook_PluginLoaded, &hub)
log.Infof("插件%s加载完毕", id)
}
}
func (pm *pluginManager) GetPluginById(id string) Plugin {
if ret, ok := pm.plugins[id]; ok {
return ret
} else {
return nil
}
}
func (pm *pluginManager) GetPlugin(name, author string) Plugin {
id := fmt.Sprintf("%s@%s", name, author)
return pm.GetPluginById(id)
}
func (pm *pluginManager) GetPluginConfig(plugin Plugin) interface{} {
if ret, ok := pm.pluginConfigStructs[getPluginId(plugin)]; ok {
return ret
} else {
return nil
}
}
// 注册插件。插件配置结构体pluginConfig可选,使用反射映射到字段,无则传nil
func RegisterPlugin(plugin Plugin, pluginConfig interface{}) {
defaultPluginManager.RegisterPlugin(plugin, pluginConfig)
}
// 获取插件配置
func GetPluginConfig(plugin Plugin) interface{} {
return defaultPluginManager.GetPluginConfig(plugin)
}
// 插件信息,其中Name和Author共同唯一标识一个插件
type PluginInfo struct {
Name string
Author string
Version string
Description string
}
type Plugin interface {
Init(hub *PluginHub) // 初始化插件
GetPluginInfo() PluginInfo
}
// 获取插件的唯一标识,格式为:“插件名@作者”
func getPluginId(plugin Plugin) string {
info := plugin.GetPluginInfo()
return fmt.Sprintf("%s@%s", info.Name, info.Author)
}
// 插件的所有Handler都挂载在这上面
type PluginHub struct {
engine *Engine
handler *Handler
plugin Plugin
}
func newPluginHub(engine *Engine) PluginHub {
ret := PluginHub{engine: engine}
ret.handler, _ = engine.NewRemovableHandler()
return ret
}
// 新建一个Handler,用于处理指定类型的事件,不写则处理所有类型的事件
func (p *PluginHub) NewHandler(eventTypes ...EventName) *Handler {
return p.handler.NewHandler(eventTypes...)
}
func (p *PluginHub) Use(middlewares ...Middleware) {
p.handler.Use(middlewares...)
}
func (p *PluginHub) GetEngineConfig() *BaseConfig {
return p.engine.Config.GetBaseConfig()
}
func (p *PluginHub) GetPluginConfig(plugin Plugin) interface{} {
return GetPluginConfig(plugin)
}
func (p *PluginHub) GetPluginId() string {
return getPluginId(p.plugin)
}
// func (p *EngineProxy) GetEngine() *Engine {
// return p.engine
// }
func (p *PluginHub) GetBot() *Bot {
return p.engine.bot
}
func convertConfigMapToStruct(cfgStruct interface{}, srcMap PluginConfigMap) {
if srcMap == nil {
return
}
if cfgStruct == nil {
panic("cfgStruct不能为空")
}
// cfg := &target.Config
value := reflect.ValueOf(cfgStruct)
if value.Kind() != reflect.Ptr {
panic(fmt.Errorf("必须传入结构体指针,而不是 %T (%v)", cfgStruct, value.Kind()))
}
value = value.Elem()
if value.Kind() != reflect.Struct {
panic(fmt.Errorf("必须传入结构体指针,而不是 %v", value.Kind()))
}
mapToStruct(srcMap, value.Addr().Interface())
}