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/
visualizationCommunication.go
165 lines (140 loc) · 3.92 KB
/
visualizationCommunication.go
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package comm
import (
"context"
"encoding/json"
"log"
"github.com/alexandrainst/agentlogic"
"github.com/libp2p/go-libp2p-core/peer"
pubsub "github.com/libp2p/go-libp2p-pubsub"
"github.com/paulmach/orb"
)
type VisualizationChannel struct {
Messages chan *VisualizationMessage
ctx context.Context
ps *pubsub.PubSub
topic *pubsub.Topic
sub *pubsub.Subscription
roomType MessageType
path string
self peer.ID
}
type VisualizationMessage struct {
MsgType MessageType
ContentType MessageType
DiscoveryMessage agentlogic.Agent
StateMessage agentlogic.State
MissionMessage agentlogic.Mission
SenderId string
SenderType agentlogic.AgentType
MissionBound orb.Bound
}
const VisualizationMessageType = -13
const VisualizationAgentType = -133
const visPath = "D2D_visualization"
var ChannelVisualization = make(chan Message, BufferSize)
var visChannel *VisualizationChannel
func sendingVisualizaMessage(channel *VisualizationChannel) {
go func() {
for {
msg := <-ChannelVisualization
vm := VisualizationMessage{
MsgType: VisualizationMessageType,
// ContentType: assertedMessage.MessageMeta.MsgType,
// StateMessage: assertedMessage,
// SenderId: assertedMessage.MessageMeta.SenderId,
//SenderType: myType,
}
switch msg.(type) {
case *StateMessage:
assertedMessage := *msg.(*StateMessage)
vm.ContentType = StateMessageType
vm.SenderId = assertedMessage.MessageMeta.SenderId
vm.StateMessage = assertedMessage.Content
vm.SenderType = assertedMessage.MessageMeta.SenderType
case *MissionMessage:
assertedMessage := *msg.(*MissionMessage)
vm.ContentType = MissionMessageType
vm.SenderId = assertedMessage.MessageMeta.SenderId
vm.MissionMessage = assertedMessage.Content
vm.SenderType = assertedMessage.MessageMeta.SenderType
case *DiscoveryMessage:
assertedMessage := *msg.(*DiscoveryMessage)
vm.ContentType = DiscoveryMessageType
vm.SenderId = assertedMessage.MessageMeta.SenderId
vm.DiscoveryMessage = assertedMessage.Content
vm.SenderType = assertedMessage.MessageMeta.SenderType
default:
log.Println("unknown message")
continue
}
msgBytes, err := json.Marshal(vm)
if err != nil {
panic(err)
}
channel.topic.Publish(channel.ctx, msgBytes)
}
}()
}
func InitVisualizationMessages(subscribe bool) *VisualizationChannel {
log.Println("Start Visualization communication")
ctx := context.Background()
ch, err := joinVisualizationComm(ctx, ps, SelfId, visPath, VisualizationMessageType, subscribe)
if err != nil {
panic(err)
}
sendingVisualizaMessage(ch)
return ch
}
func joinVisualizationComm(ctx context.Context, ps *pubsub.PubSub, selfID peer.ID, path string, roomType MessageType, subscribePath bool) (*VisualizationChannel, error) {
topic, err := ps.Join(path)
if err != nil {
return nil, err
}
// and subscribe to it
sub, err := topic.Subscribe()
if err != nil {
return nil, err
}
ch := &VisualizationChannel{
ctx: ctx,
ps: ps,
topic: topic,
sub: sub,
self: selfID,
path: path,
roomType: roomType,
Messages: make(chan *VisualizationMessage, BufferSize),
}
visChannel = ch
// start reading messages from the subscription in a loop
log.Println("Channel with path " + path + " joined")
if subscribePath {
go ch.readLoop()
log.Println("read loop started")
}
return ch, nil
}
func (vc *VisualizationChannel) readLoop() {
for {
msg, err := vc.sub.Next(vc.ctx)
if err != nil {
close(vc.Messages)
return
}
// only forward messages delivered by others
if msg.ReceivedFrom == vc.self {
continue
}
vm := new(VisualizationMessage)
err = json.Unmarshal(msg.Data, vm)
if err != nil {
log.Println("eeerrrr!!!!")
log.Println(err)
//log.Println(msg.Data)
continue
}
//log.Println("messages received")
// send valid messages onto the Messages channel
vc.Messages <- vm
}
}