From e4c0ca0f4807a36a6cc0ea5f793905539afa4648 Mon Sep 17 00:00:00 2001 From: Wim Date: Sat, 12 Mar 2022 17:06:39 +0100 Subject: Switch to discordgo upstream again (#1759) * Switch to upstream discordgo again * Fix discord api changes --- vendor/github.com/bwmarrin/discordgo/event.go | 247 ++++++++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 vendor/github.com/bwmarrin/discordgo/event.go (limited to 'vendor/github.com/bwmarrin/discordgo/event.go') diff --git a/vendor/github.com/bwmarrin/discordgo/event.go b/vendor/github.com/bwmarrin/discordgo/event.go new file mode 100644 index 00000000..84dbdc7f --- /dev/null +++ b/vendor/github.com/bwmarrin/discordgo/event.go @@ -0,0 +1,247 @@ +package discordgo + +// EventHandler is an interface for Discord events. +type EventHandler interface { + // Type returns the type of event this handler belongs to. + Type() string + + // Handle is called whenever an event of Type() happens. + // It is the receivers responsibility to type assert that the interface + // is the expected struct. + Handle(*Session, interface{}) +} + +// EventInterfaceProvider is an interface for providing empty interfaces for +// Discord events. +type EventInterfaceProvider interface { + // Type is the type of event this handler belongs to. + Type() string + + // New returns a new instance of the struct this event handler handles. + // This is called once per event. + // The struct is provided to all handlers of the same Type(). + New() interface{} +} + +// interfaceEventType is the event handler type for interface{} events. +const interfaceEventType = "__INTERFACE__" + +// interfaceEventHandler is an event handler for interface{} events. +type interfaceEventHandler func(*Session, interface{}) + +// Type returns the event type for interface{} events. +func (eh interfaceEventHandler) Type() string { + return interfaceEventType +} + +// Handle is the handler for an interface{} event. +func (eh interfaceEventHandler) Handle(s *Session, i interface{}) { + eh(s, i) +} + +var registeredInterfaceProviders = map[string]EventInterfaceProvider{} + +// registerInterfaceProvider registers a provider so that DiscordGo can +// access it's New() method. +func registerInterfaceProvider(eh EventInterfaceProvider) { + if _, ok := registeredInterfaceProviders[eh.Type()]; ok { + return + // XXX: + // if we should error here, we need to do something with it. + // fmt.Errorf("event %s already registered", eh.Type()) + } + registeredInterfaceProviders[eh.Type()] = eh + return +} + +// eventHandlerInstance is a wrapper around an event handler, as functions +// cannot be compared directly. +type eventHandlerInstance struct { + eventHandler EventHandler +} + +// addEventHandler adds an event handler that will be fired anytime +// the Discord WSAPI matching eventHandler.Type() fires. +func (s *Session) addEventHandler(eventHandler EventHandler) func() { + s.handlersMu.Lock() + defer s.handlersMu.Unlock() + + if s.handlers == nil { + s.handlers = map[string][]*eventHandlerInstance{} + } + + ehi := &eventHandlerInstance{eventHandler} + s.handlers[eventHandler.Type()] = append(s.handlers[eventHandler.Type()], ehi) + + return func() { + s.removeEventHandlerInstance(eventHandler.Type(), ehi) + } +} + +// addEventHandler adds an event handler that will be fired the next time +// the Discord WSAPI matching eventHandler.Type() fires. +func (s *Session) addEventHandlerOnce(eventHandler EventHandler) func() { + s.handlersMu.Lock() + defer s.handlersMu.Unlock() + + if s.onceHandlers == nil { + s.onceHandlers = map[string][]*eventHandlerInstance{} + } + + ehi := &eventHandlerInstance{eventHandler} + s.onceHandlers[eventHandler.Type()] = append(s.onceHandlers[eventHandler.Type()], ehi) + + return func() { + s.removeEventHandlerInstance(eventHandler.Type(), ehi) + } +} + +// AddHandler allows you to add an event handler that will be fired anytime +// the Discord WSAPI event that matches the function fires. +// The first parameter is a *Session, and the second parameter is a pointer +// to a struct corresponding to the event for which you want to listen. +// +// eg: +// Session.AddHandler(func(s *discordgo.Session, m *discordgo.MessageCreate) { +// }) +// +// or: +// Session.AddHandler(func(s *discordgo.Session, m *discordgo.PresenceUpdate) { +// }) +// +// List of events can be found at this page, with corresponding names in the +// library for each event: https://discord.com/developers/docs/topics/gateway#event-names +// There are also synthetic events fired by the library internally which are +// available for handling, like Connect, Disconnect, and RateLimit. +// events.go contains all of the Discord WSAPI and synthetic events that can be handled. +// +// The return value of this method is a function, that when called will remove the +// event handler. +func (s *Session) AddHandler(handler interface{}) func() { + eh := handlerForInterface(handler) + + if eh == nil { + s.log(LogError, "Invalid handler type, handler will never be called") + return func() {} + } + + return s.addEventHandler(eh) +} + +// AddHandlerOnce allows you to add an event handler that will be fired the next time +// the Discord WSAPI event that matches the function fires. +// See AddHandler for more details. +func (s *Session) AddHandlerOnce(handler interface{}) func() { + eh := handlerForInterface(handler) + + if eh == nil { + s.log(LogError, "Invalid handler type, handler will never be called") + return func() {} + } + + return s.addEventHandlerOnce(eh) +} + +// removeEventHandler instance removes an event handler instance. +func (s *Session) removeEventHandlerInstance(t string, ehi *eventHandlerInstance) { + s.handlersMu.Lock() + defer s.handlersMu.Unlock() + + handlers := s.handlers[t] + for i := range handlers { + if handlers[i] == ehi { + s.handlers[t] = append(handlers[:i], handlers[i+1:]...) + } + } + + onceHandlers := s.onceHandlers[t] + for i := range onceHandlers { + if onceHandlers[i] == ehi { + s.onceHandlers[t] = append(onceHandlers[:i], onceHandlers[i+1:]...) + } + } +} + +// Handles calling permanent and once handlers for an event type. +func (s *Session) handle(t string, i interface{}) { + for _, eh := range s.handlers[t] { + if s.SyncEvents { + eh.eventHandler.Handle(s, i) + } else { + go eh.eventHandler.Handle(s, i) + } + } + + if len(s.onceHandlers[t]) > 0 { + for _, eh := range s.onceHandlers[t] { + if s.SyncEvents { + eh.eventHandler.Handle(s, i) + } else { + go eh.eventHandler.Handle(s, i) + } + } + s.onceHandlers[t] = nil + } +} + +// Handles an event type by calling internal methods, firing handlers and firing the +// interface{} event. +func (s *Session) handleEvent(t string, i interface{}) { + s.handlersMu.RLock() + defer s.handlersMu.RUnlock() + + // All events are dispatched internally first. + s.onInterface(i) + + // Then they are dispatched to anyone handling interface{} events. + s.handle(interfaceEventType, i) + + // Finally they are dispatched to any typed handlers. + s.handle(t, i) +} + +// setGuildIds will set the GuildID on all the members of a guild. +// This is done as event data does not have it set. +func setGuildIds(g *Guild) { + for _, c := range g.Channels { + c.GuildID = g.ID + } + + for _, m := range g.Members { + m.GuildID = g.ID + } + + for _, vs := range g.VoiceStates { + vs.GuildID = g.ID + } +} + +// onInterface handles all internal events and routes them to the appropriate internal handler. +func (s *Session) onInterface(i interface{}) { + switch t := i.(type) { + case *Ready: + for _, g := range t.Guilds { + setGuildIds(g) + } + s.onReady(t) + case *GuildCreate: + setGuildIds(t.Guild) + case *GuildUpdate: + setGuildIds(t.Guild) + case *VoiceServerUpdate: + go s.onVoiceServerUpdate(t) + case *VoiceStateUpdate: + go s.onVoiceStateUpdate(t) + } + err := s.State.OnInterface(s, i) + if err != nil { + s.log(LogDebug, "error dispatching internal event, %s", err) + } +} + +// onReady handles the ready event. +func (s *Session) onReady(r *Ready) { + + // Store the SessionID within the Session struct. + s.sessionID = r.SessionID +} -- cgit v1.2.3