95 lines
2.0 KiB
Go
95 lines
2.0 KiB
Go
package arlo
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import (
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"bytes"
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"encoding/json"
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"net/http"
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"sync"
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"github.com/pkg/errors"
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"github.com/r3labs/sse"
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)
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var (
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FAILED_TO_PUBLISH = errors.New("failed to publish")
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FAILED_TO_DECODE_JSON = errors.New("failed to decode json")
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FAILED_TO_SUBSCRIBE = errors.New("failed to subscribe to seeclient")
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)
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type EventStream struct {
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SSEClient *sse.Client
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Subscriptions map[string]chan *EventStreamResponse
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Events chan *sse.Event
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Error chan error
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Close chan interface{}
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Connected bool
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Verbose bool
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sync.Mutex
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}
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func NewEventStream(url string, client *http.Client) *EventStream {
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SSEClient := sse.NewClient(url)
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SSEClient.Connection = client
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return &EventStream{
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SSEClient: SSEClient,
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Events: make(chan *sse.Event),
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Subscriptions: make(map[string]chan *EventStreamResponse),
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Error: make(chan error),
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Close: make(chan interface{}),
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}
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}
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func (e *EventStream) Listen() (connected chan bool) {
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connected = make(chan bool)
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go func() {
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err := e.SSEClient.SubscribeChanRaw(e.Events)
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if err != nil {
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e.Error <- FAILED_TO_SUBSCRIBE
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}
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for {
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select {
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case event := <-e.Events:
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/*
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fmt.Println("Got event message.")
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fmt.Printf("EVENT: %s\n", event.Event)
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fmt.Printf("DATA: %s\n", event.Data)
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*/
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if event.Data != nil {
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notifyResponse := &EventStreamResponse{}
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b := bytes.NewBuffer(event.Data)
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err := json.NewDecoder(b).Decode(notifyResponse)
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if err != nil {
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e.Error <- FAILED_TO_DECODE_JSON
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break
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}
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if notifyResponse.Status == "connected" {
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connected <- true
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} else if notifyResponse.Status == "disconnected" {
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connected <- false
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} else {
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if subscriber, ok := e.Subscriptions[notifyResponse.TransId]; ok {
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e.Lock()
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subscriber <- notifyResponse
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e.Unlock()
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}
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}
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}
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case <-e.Close:
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connected <- false
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return
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}
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}
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}()
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return connected
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}
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