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package shibshib
import (
"fmt"
"net/url"
"reflect"
"strings"
authv1 "github.com/harmony-development/shibshib/gen/auth/v1"
chatv1 "github.com/harmony-development/shibshib/gen/chat/v1"
)
type FederatedClient struct {
Client
homeserver string
subclients map[string]*Client
streams map[<-chan *LocatedMessage]*Client
listening map[*Client]<-chan *LocatedMessage
}
type FederatedEvent struct {
Client *Client
Event *LocatedMessage
}
func NewFederatedClient(homeserver, token string, userID uint64) (*FederatedClient, error) {
url, err := url.Parse(homeserver)
if err != nil {
return nil, err
}
it := "wss"
if url.Scheme == "http" {
it = "ws"
}
self := &FederatedClient{}
self.homeserver = homeserver
self.Client.homeserver = homeserver
self.init(homeserver, it, url.Host)
self.authed(token, userID)
self.subclients = make(map[string]*Client)
self.streams = make(map[<-chan *LocatedMessage]*Client)
self.listening = make(map[*Client]<-chan *LocatedMessage)
err = self.StreamEvents()
if err != nil {
return nil, fmt.Errorf("NewFederatedClient: own streamevents failed: %w", err)
}
return self, nil
}
func (f *FederatedClient) clientFor(homeserver string) (*Client, error) {
if f.homeserver == homeserver || strings.Split(homeserver, ":")[0] == "localhost" || homeserver == "" {
return &f.Client, nil
}
if val, ok := f.subclients[homeserver]; ok {
return val, nil
}
session, err := f.AuthKit.Federate(&authv1.FederateRequest{
ServerId: homeserver,
})
if err != nil {
return nil, fmt.Errorf("ClientFor: homeserver federation step failed: %w", err)
}
url, err := url.Parse(homeserver)
if err != nil {
return nil, err
}
scheme := "wss"
if url.Scheme == "http" {
scheme = "ws"
}
c := new(Client)
c.init(homeserver, scheme, url.Host)
data, err := c.AuthKit.LoginFederated(&authv1.LoginFederatedRequest{
AuthToken: session.Token,
ServerId: f.homeserver,
})
if err != nil {
return nil, fmt.Errorf("ClientFor: failed to log into foreignserver: %w", err)
}
c.authed(data.Session.SessionToken, data.Session.UserId)
err = c.StreamEvents()
if err != nil {
return nil, fmt.Errorf("ClientFor: failed to stream events for foreign server: %w", err)
}
f.subclients[homeserver] = c
return c, nil
}
func (f *FederatedClient) Start() (<-chan FederatedEvent, error) {
list, err := f.ChatKit.GetGuildList(&chatv1.GetGuildListRequest{})
if err != nil {
return nil, fmt.Errorf("Start: failed to get guild list on homeserver: %w", err)
}
cases := []reflect.SelectCase{}
for _, g := range list.Guilds {
client, err := f.clientFor(g.ServerId)
if err != nil {
return nil, fmt.Errorf("Start: failed to get client for guild %s/%d: %w", g.ServerId, g.GuildId, err)
}
stream, ok := f.listening[client]
if !ok {
stream = client.EventsStream()
cases = append(cases, reflect.SelectCase{
Dir: reflect.SelectRecv,
Chan: reflect.ValueOf(stream),
})
client.ErrorHandler = func(e error) {
if e == ErrEndOfStream {
err := client.StreamEvents()
if err != nil {
panic(fmt.Errorf("client.ErrorHandler: could not restart stream: %w", err))
}
cp := client.subscribedGuilds
client.subscribedGuilds = make([]uint64, 0)
for _, gg := range cp {
client.SubscribeToGuild(gg)
}
} else {
panic(err)
}
}
f.listening[client] = stream
f.streams[stream] = client
}
client.SubscribeToGuild(g.GuildId)
}
channel := make(chan FederatedEvent)
go func() {
for {
i, v, ok := reflect.Select(cases)
if !ok {
cases = append(cases[:i], cases[i+1:]...)
}
val := v.Interface().(*LocatedMessage)
channel <- FederatedEvent{
Event: val,
Client: f.streams[cases[i].Chan.Interface().(<-chan *LocatedMessage)],
}
}
}()
return channel, nil
}
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