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17b9c73ce3
This commit refactors the whole package gateway as well as utils/ws
(formerly utils/wsutil) and voice/voicegateway. The new refactor
utilizes a design pattern involving a concurrent loop and an arriving
event channel.
An additional change was made to the way gateway events are typed.
Before, pretty much any type will satisfy a gateway event type, since
the actual type was just interface{}. The new refactor defines a
concrete interface that events can implement:
type Event interface {
Op() OpCode
EventType() EventType
}
Using this interface, the user can easily add custom gateway events
independently of the library without relying on string maps. This adds a
lot of type safety into the library and makes type-switching on Event
types much more reasonable.
Gateway error callbacks are also almost entirely removed in favor of
custom gateway events. A catch-all can easily be added like this:
s.AddHandler(func(err error) {
log.Println("gateway error:, err")
})
134 lines
4.5 KiB
Go
134 lines
4.5 KiB
Go
package voicegateway
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import (
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"strconv"
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"github.com/diamondburned/arikawa/v3/discord"
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"github.com/diamondburned/arikawa/v3/utils/ws"
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)
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//go:generate go run ../../utils/cmd/genevent -p voicegateway -o event_methods.go
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// OpUnmarshalers contains the Op unmarshalers for the voice gateway events.
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var OpUnmarshalers = ws.NewOpUnmarshalers()
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// IdentifyCommand is a command for Op 0.
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//
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// https://discord.com/developers/docs/topics/voice-connections#establishing-a-voice-websocket-connection-example-voice-identify-payload
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type IdentifyCommand struct {
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GuildID discord.GuildID `json:"server_id"` // yes, this should be "server_id"
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UserID discord.UserID `json:"user_id"`
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SessionID string `json:"session_id"`
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Token string `json:"token"`
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}
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// SelectProtocolCommand is a command for Op 1.
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//
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// https://discord.com/developers/docs/topics/voice-connections#establishing-a-voice-udp-connection-example-select-protocol-payload
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type SelectProtocolCommand struct {
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Protocol string `json:"protocol"`
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Data SelectProtocolData `json:"data"`
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}
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// SelectProtocolData is the data inside a SelectProtocolCommand.
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type SelectProtocolData struct {
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Address string `json:"address"`
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Port uint16 `json:"port"`
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Mode string `json:"mode"`
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}
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// ReadyEvent is an event for Op 2.
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//
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// https://discord.com/developers/docs/topics/voice-connections#establishing-a-voice-websocket-connection-example-voice-ready-payload
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type ReadyEvent struct {
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SSRC uint32 `json:"ssrc"`
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IP string `json:"ip"`
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Port int `json:"port"`
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Modes []string `json:"modes"`
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Experiments []string `json:"experiments"`
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// From Discord's API Docs:
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//
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// `heartbeat_interval` here is an erroneous field and should be ignored.
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// The correct `heartbeat_interval` value comes from the Hello payload.
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// HeartbeatInterval discord.Milliseconds `json:"heartbeat_interval"`
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}
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// Addr formats the URL inside Ready to be of format "host:port".
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func (r ReadyEvent) Addr() string {
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return r.IP + ":" + strconv.Itoa(r.Port)
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}
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// HeartbeatCommand is a command for Op 3.
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//
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// https://discord.com/developers/docs/topics/voice-connections#heartbeating-example-heartbeat-payload
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type HeartbeatCommand uint64
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// SessionDescriptionEvent is an event for Op 4.
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//
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// https://discord.com/developers/docs/topics/voice-connections#establishing-a-voice-udp-connection-example-session-description-payload
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type SessionDescriptionEvent struct {
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Mode string `json:"mode"`
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SecretKey [32]byte `json:"secret_key"`
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}
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// https://discord.com/developers/docs/topics/voice-connections#speaking
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type SpeakingFlag uint64
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const (
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NotSpeaking SpeakingFlag = 0
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Microphone SpeakingFlag = 1 << iota
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Soundshare
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Priority
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)
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// SpeakingEvent is an event for Op 5. It is also a command.
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//
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// https://discord.com/developers/docs/topics/voice-connections#speaking-example-speaking-payload
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type SpeakingEvent struct {
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Speaking SpeakingFlag `json:"speaking"`
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Delay int `json:"delay"`
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SSRC uint32 `json:"ssrc"`
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UserID discord.UserID `json:"user_id,omitempty"`
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}
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// HeartbeatAckEvent is an event for Op 6.
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//
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// https://discord.com/developers/docs/topics/voice-connections#heartbeating-example-heartbeat-ack-payload
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type HeartbeatAckEvent uint64
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// ResumeCommand is a command for Op 7.
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//
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// https://discord.com/developers/docs/topics/voice-connections#resuming-voice-connection-example-resume-connection-payload
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type ResumeCommand struct {
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GuildID discord.GuildID `json:"server_id"` // yes, this should be "server_id"
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SessionID string `json:"session_id"`
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Token string `json:"token"`
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}
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// HelloEvent is an event for Op 8.
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//
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// https://discord.com/developers/docs/topics/voice-connections#heartbeating-example-hello-payload-since-v3
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type HelloEvent struct {
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HeartbeatInterval discord.Milliseconds `json:"heartbeat_interval"`
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}
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// ResumedEvent is an event for Op 9.
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// https://discord.com/developers/docs/topics/voice-connections#resuming-voice-connection-example-resumed-payload
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type ResumedEvent struct{}
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// ClientConnectEvent is an event for Op 12. It is undocumented.
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type ClientConnectEvent struct {
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UserID discord.UserID `json:"user_id"`
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AudioSSRC uint32 `json:"audio_ssrc"`
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VideoSSRC uint32 `json:"video_ssrc"`
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}
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// ClientDisconnectEvent is an event for Op 13. It is undocumented, but its
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// existence is mentioned in this issue:
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// https://github.com/discord/discord-api-docs/issues/510.
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type ClientDisconnectEvent struct {
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UserID discord.UserID `json:"user_id"`
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}
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