/
listener.go
101 lines (93 loc) · 2.21 KB
/
listener.go
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package channel
import (
"context"
"encoding/json"
"log"
)
func (c *ChatChannel) startListeners(ctx context.Context) {
log.Println("---> listener started")
go c.listenToPubSub(ctx)
go c.listenToPeers(ctx)
}
func (c *ChatChannel) listenToPubSub(ctx context.Context) {
for {
// listen
next, err := c.sub.Next(ctx)
if err != nil {
if err.Error() == "subscription cancelled by calling sub.Cancel()" || err.Error() == "context canceled" {
log.Printf("exit listenToPubSub")
return
}
log.Printf("error: %v at listenToPubSub, Next(ctx)", err)
continue
}
if next.GetFrom().Pretty() == c.userID {
continue
}
// unmarshall
var msg pubsubRawMessage
json.Unmarshal(next.GetData(), &msg)
if err != nil {
log.Printf("error: %v at listenToPubSub, Unmarshal(next.GetData(), &msg)", err)
continue
}
// if c.peerIDToMsgList[c.userID].PeerName == "tester0" {
// log.Println(next.GetFrom().Pretty())
// log.Println(msg.MsgType)
// }
select {
case c.pubsubQueue <- pubsubMessage{
MsgType: msg.MsgType,
Sender: next.GetFrom().Pretty(),
Data: msg.Data,
}:
case <-ctx.Done():
log.Printf("exit listenToPubSub")
return
}
}
}
func (c *ChatChannel) listenToPeers(ctx context.Context) {
for {
select {
case msg := <-c.pubsubQueue:
switch msg.MsgType {
case chatMESSAGE:
var data chatMessage
err := json.Unmarshal(msg.Data, &data)
if err != nil {
log.Printf("error: %v at listenToPeers(), message", err)
break
}
data.AuthorID = msg.Sender
c.chatQueue <- data
break
case syncMESSAGE:
var data syncMessage
err := json.Unmarshal(msg.Data, &data)
if err != nil {
log.Printf("error: %v at listenToPeers(), syncMessages", err)
break
}
data.SenderID = msg.Sender
c.syncMsgQueue <- data
break
case stateMESSAGE:
var data syncState
err := json.Unmarshal(msg.Data, &data)
if err != nil {
log.Printf("error: %v at listenToPeers(), state", err)
break
}
data.SenderID = msg.Sender
c.stateQueue <- data
break
default:
log.Printf("message type %s is not supported", msg.MsgType)
}
case <-ctx.Done():
log.Printf("exit listenToPeers")
return
}
}
}