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advanced_channel_groups.go
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/
advanced_channel_groups.go
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package main
import (
"fmt"
"log"
"strconv"
"time"
pubnub "github.com/pubnub/go"
)
var pn *pubnub.PubNub
func init() {
config := pubnub.NewConfig()
config.SubscribeKey = "sub-c-b9ab9508-43cf-11e8-9967-869954283fb4"
config.PublishKey = "pub-c-1bd448ed-05ba-4dbc-81a5-7d6ff5c6e2bb"
pn = pubnub.NewPubNub(config)
}
func main() {
data := map[string]string{}
data["author"] = "user-a"
data["status"] = "I am reading about Advanced Channel Groups!"
data["timestamp"] = strconv.Itoa(int(time.Now().Unix()))
publishRes, _, err := pn.Publish().
Message(data).
Channel("ch-user-a-status").
Execute()
if err != nil {
fmt.Println("error :", err)
}
fmt.Println(publishRes.Timestamp)
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-a-present"}).
ChannelGroup("cg-user-a-friends").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-a-present"}).
ChannelGroup("cg-user-a-status-feed").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
// ************************************
// * User A and User B become friends
// ************************************
// Add User B to User A's groups: Add ch-user-b-present to cg-user-a-friends
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-b-present"}).
ChannelGroup("cg-user-a-friends").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
// Add User B to User A's groups: ch-user-b-status to cg-user-a-status-feed
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-b-status"}).
ChannelGroup("cg-user-a-status-feed").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
// Add User A to User B's groups: Add ch-user-a-present to cg-user-b-friends
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-a-present"}).
ChannelGroup("cg-user-b-friends").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
// Add User B to User A's groups: ch-user-a-status to cg-user-b-status-feed
_, _, err = pn.AddChannelToChannelGroup().
Channels([]string{"ch-user-a-status"}).
ChannelGroup("cg-user-b-status-feed").
Execute()
if err != nil {
fmt.Println("Operation failed: ", err)
}
fmt.Println("Channel added to channel group")
// Get the List of Friends
listChannelsRes, _, err := pn.ListChannelsInChannelGroup().
ChannelGroup("cg-user-a-friends").
Execute()
if err != nil {
fmt.Println("Operation failed ", err)
}
fmt.Println("FRIEND LIST: ")
for k, v := range listChannelsRes.Channels {
fmt.Println("channel: ", k, v)
}
// Which Friends are online right now
hereNowRes, _, err := pn.HereNow().
ChannelGroups([]string{"cg-user-a-friends"}).
Execute()
if err != nil {
fmt.Println("Operation failed ", err)
}
fmt.Println("ONLINE NOW: ", hereNowRes.TotalOccupancy)
listener := pubnub.NewListener()
go func() {
for {
select {
case <-listener.Status:
case <-listener.Message:
case presence := <-listener.Presence:
log.Println("PRESENCE ", presence)
}
}
}()
// Watch Friends come online / go offline
pn.Subscribe().
Channels([]string{"cg-user-a-friends"}).
WithPresence(true).
Execute()
}