Add Gitter support

vendor/github.com/mrexodia/wray/go_faye.go

@@ -0,0 +1,140 @@
+package wray
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+const (
+	UNCONNECTED  = 1
+	CONNECTING   = 2
+	CONNECTED    = 3
+	DISCONNECTED = 4
+
+	HANDSHAKE = "handshake"
+	RETRY     = "retry"
+	NONE      = "none"
+
+	CONNECTION_TIMEOUT = 60.0
+	DEFAULT_RETRY      = 5.0
+	MAX_REQUEST_SIZE   = 2048
+)
+
+var (
+	MANDATORY_CONNECTION_TYPES = []string{"long-polling"}
+	registeredTransports       = []Transport{}
+)
+
+type FayeClient struct {
+	state         int
+	url           string
+	subscriptions []Subscription
+	transport     Transport
+	clientId      string
+	schedular     Schedular
+}
+
+type Subscription struct {
+	channel  string
+	callback func(Message)
+}
+
+type SubscriptionPromise struct {
+	subscription Subscription
+}
+
+func NewFayeClient(url string) *FayeClient {
+	schedular := ChannelSchedular{}
+	client := &FayeClient{url: url, state: UNCONNECTED, schedular: schedular}
+	return client
+}
+
+func (self *FayeClient) handshake() {
+	t, err := SelectTransport(self, MANDATORY_CONNECTION_TYPES, []string{})
+	if err != nil {
+		panic("No usable transports available")
+	}
+	self.transport = t
+	self.transport.setUrl(self.url)
+	self.state = CONNECTING
+	handshakeParams := map[string]interface{}{"channel": "/meta/handshake",
+		"version":                  "1.0",
+		"supportedConnectionTypes": []string{"long-polling"}}
+	response, err := self.transport.send(handshakeParams)
+	if err != nil {
+		fmt.Println("Handshake failed. Retry in 10 seconds")
+		self.state = UNCONNECTED
+		self.schedular.wait(10*time.Second, func() {
+			fmt.Println("retying handshake")
+			self.handshake()
+		})
+		return
+	}
+	self.clientId = response.clientId
+	self.state = CONNECTED
+	self.transport, err = SelectTransport(self, response.supportedConnectionTypes, []string{})
+	if err != nil {
+		panic("Server does not support any available transports. Supported transports: " + strings.Join(response.supportedConnectionTypes, ","))
+	}
+}
+
+func (self *FayeClient) Subscribe(channel string, force bool, callback func(Message)) SubscriptionPromise {
+	if self.state == UNCONNECTED {
+		self.handshake()
+	}
+	subscriptionParams := map[string]interface{}{"channel": "/meta/subscribe", "clientId": self.clientId, "subscription": channel, "id": "1"}
+	subscription := Subscription{channel: channel, callback: callback}
+	//TODO: deal with subscription failures
+	self.transport.send(subscriptionParams)
+	self.subscriptions = append(self.subscriptions, subscription)
+	return SubscriptionPromise{subscription}
+}
+
+func (self *FayeClient) handleResponse(response Response) {
+	for _, message := range response.messages {
+		for _, subscription := range self.subscriptions {
+			matched, _ := filepath.Match(subscription.channel, message.Channel)
+			if matched {
+				go subscription.callback(message)
+			}
+		}
+	}
+}
+
+func (self *FayeClient) connect() {
+	connectParams := map[string]interface{}{"channel": "/meta/connect", "clientId": self.clientId, "connectionType": self.transport.connectionType()}
+	responseChannel := make(chan Response)
+	go func() {
+		response, _ := self.transport.send(connectParams)
+		responseChannel <- response
+	}()
+	self.listen(responseChannel)
+}
+
+func (self *FayeClient) listen(responseChannel chan Response) {
+	response := <-responseChannel
+	if response.successful == true {
+		go self.handleResponse(response)
+	} else {
+	}
+}
+
+func (self *FayeClient) Listen() {
+	for {
+		self.connect()
+	}
+}
+
+func (self *FayeClient) Publish(channel string, data map[string]interface{}) {
+	if self.state != CONNECTED {
+		self.handshake()
+	}
+	publishParams := map[string]interface{}{"channel": channel, "data": data, "clientId": self.clientId}
+	self.transport.send(publishParams)
+}
+
+func RegisterTransports(transports []Transport) {
+	registeredTransports = transports
+}