/
handle_op.go
162 lines (155 loc) · 4 KB
/
handle_op.go
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package gateway
import (
"context"
"github.com/BOOMfinity/go-utils/broadcaster"
"time"
"github.com/BOOMfinity/bfcord/gateway/events"
"github.com/BOOMfinity/bfcord/gateway/intents"
"github.com/BOOMfinity/bfcord/internal/bitfield"
"github.com/segmentio/encoding/json"
)
func (g *Gateway) handleOp() error {
switch g.sharedPayload.OP {
case HelloOp:
data, err := PayloadTo[helloData](g.sharedPayload)
if err != nil {
return err
}
if g.resume {
g.resume = false
_ = g.ws.WriteJSON(context.Background(), map[string]any{
"op": ResumeOp,
"d": map[string]any{
"token": g.options.identify.Token,
"session_id": g.sessionID,
"seq": g.seq.Load(),
},
})
} else {
_ = g.ws.WriteJSON(context.Background(), map[string]any{
"op": IdentifyOp,
"d": g.options.identify,
})
}
go g.handleHeartbeat(time.Duration(data.Interval) * time.Millisecond)
case InvalidSessionOp:
resumable, err := PayloadTo[bool](g.sharedPayload)
if err != nil {
return err
}
g.Logger.Warn().Add("Resumable: %v", resumable).Send("Received invalid session")
if resumable {
_ = g.Reconnect(context.Background(), true)
} else {
_ = g.Reconnect(context.Background(), false)
}
case HeartbeatOp:
g.Logger.Debug().Send("Discord requested the heartbeat")
g.sendHeartbeat()
case HeartbeatAckOp:
g.Logger.Debug().Send("Heartbeat ACK (%v)", time.Since(g.heartbeatTime).String())
case ReconnectOp:
g.Logger.Debug().Send("Discord sent the reconnect OP")
go g.Reconnect(context.Background(), true)
case DispatchOp:
g.seq.Store(g.sharedPayload.Seq)
g.eventChannel.SendAsync(g.sharedPayload.Event)
switch g.sharedPayload.Event {
case events.ShardReady:
data, err := PayloadTo[ReadyEvent](g.sharedPayload)
if err != nil {
return err
}
g.Logger.Debug().Any(data.Shard).Add("%v guilds", len(data.Guilds)).Send("Ready as %v", data.User.Tag())
g.sessionID = data.SessionID
g.resumeGatewayURL = data.ResumeGatewayURL
if len(data.Guilds) > 0 && bitfield.Has(g.options.identify.Intents, intents.Guilds) {
go g.handlePrefetching()
} else {
if g.onData != nil {
g.onData(staticPrefetchCompletedPayload)
}
g.eventChannel.SendAsync(events.ShardPrefetchCompleted)
}
case events.ShardResumed:
g.Logger.Warn().Send("Session resumed successfully")
case events.GuildMembersChunk:
data, err := PayloadTo[RequestMembersResponse](g.sharedPayload)
if err != nil {
return err
}
g.mut.RLock()
ch, ok := g.membersChannel[data.Nonce]
if ok {
ch <- data
}
g.mut.RUnlock()
}
if g.onData != nil {
g.onData(g.sharedPayload)
}
}
return nil
}
func (g *Gateway) handlePrefetching() {
member := g.eventChannel.Join()
member.WithFilter(func(msg broadcaster.Message[events.Event]) bool {
return msg.Data() == events.GuildCreate
})
opMember := g.channel.Join()
defer member.Close()
defer opMember.Close()
timer := time.NewTimer(4 * time.Second)
defer timer.Stop()
for {
select {
case _, more := <-member.Out:
if !more {
return
}
timer.Reset(2 * time.Second)
case msg, more := <-opMember.Out:
if !more {
return
}
if msg.Data() == 111 {
return
}
case <-timer.C:
if g.onData != nil {
g.onData(staticPrefetchCompletedPayload)
}
g.eventChannel.SendAsync(events.ShardPrefetchCompleted)
return
}
}
}
func (g *Gateway) sendHeartbeat() {
g.heartbeatTime = time.Now()
_ = g.ws.WriteJSON(context.Background(), map[string]any{
"op": HeartbeatOp,
"d": g.seq.Load(),
})
}
func (g *Gateway) handleHeartbeat(dur time.Duration) {
g.Logger.Debug().Send("Starting heartbeat with interval: %v", dur.String())
g.sendHeartbeat()
member := g.channel.Join()
timer := time.NewTicker(dur)
for {
select {
case <-timer.C:
g.sendHeartbeat()
case msg := <-member.Out:
if msg.Data() == 111 {
g.Logger.Debug().Send("Exiting heartbeat loop")
member.Close()
return
}
}
}
}
func PayloadTo[V any](p *Payload) (x V, err error) {
err = json.Unmarshal(p.Data, &x)
return
}