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subscribe_request.go
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subscribe_request.go
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package pubnub
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"strconv"
"github.com/pubnub/go/utils"
)
const subscribePath = "/v2/subscribe/%s/%s/0"
type SubscribeResponse struct {
}
type subscribeOpts struct {
pubnub *PubNub
Channels []string
ChannelGroups []string
Heartbeat int
Region string
Timetoken int64
FilterExpression string
WithPresence bool
State map[string]interface{}
stringState string
ctx Context
}
type subscribeBuilder struct {
opts *subscribeOpts
operation *SubscribeOperation
}
func newSubscribeBuilder(pubnub *PubNub) *subscribeBuilder {
builder := subscribeBuilder{
opts: &subscribeOpts{
pubnub: pubnub,
},
operation: &SubscribeOperation{},
}
return &builder
}
func (b *subscribeBuilder) Channels(channels []string) *subscribeBuilder {
b.operation.Channels = channels
return b
}
func (b *subscribeBuilder) ChannelGroups(groups []string) *subscribeBuilder {
b.operation.ChannelGroups = groups
return b
}
func (b *subscribeBuilder) Timetoken(tt int64) *subscribeBuilder {
b.operation.Timetoken = tt
return b
}
func (b *subscribeBuilder) FilterExpression(expr string) *subscribeBuilder {
b.operation.FilterExpression = expr
return b
}
func (b *subscribeBuilder) WithPresence(pres bool) *subscribeBuilder {
b.operation.PresenceEnabled = pres
return b
}
func (b *subscribeBuilder) State(state map[string]interface{}) *subscribeBuilder {
b.operation.State = state
return b
}
func (b *subscribeBuilder) Execute() {
b.opts.pubnub.subscriptionManager.adaptSubscribe(b.operation)
}
func (o *subscribeOpts) config() Config {
return *o.pubnub.Config
}
func (o *subscribeOpts) client() *http.Client {
return o.pubnub.GetSubscribeClient()
}
func (o *subscribeOpts) context() Context {
return o.ctx
}
func (o *subscribeOpts) validate() error {
if o.config().PublishKey == "" {
return newValidationError(o, StrMissingPubKey)
}
if o.config().SubscribeKey == "" {
return newValidationError(o, StrMissingSubKey)
}
if len(o.Channels) == 0 && len(o.ChannelGroups) == 0 {
return newValidationError(o, StrMissingChannel)
}
if o.State != nil {
state, err := json.Marshal(o.State)
if err != nil {
return newValidationError(o, err.Error())
}
o.stringState = string(state)
}
return nil
}
func (o *subscribeOpts) buildPath() (string, error) {
channels := utils.JoinChannels(o.Channels)
return fmt.Sprintf(subscribePath,
o.pubnub.Config.SubscribeKey,
channels,
), nil
}
func (o *subscribeOpts) buildQuery() (*url.Values, error) {
q := defaultQuery(o.pubnub.Config.Uuid, o.pubnub.telemetryManager)
if len(o.ChannelGroups) > 0 {
channelGroup := utils.JoinChannels(o.ChannelGroups)
q.Set("channel-group", string(channelGroup))
}
if o.Timetoken != 0 {
q.Set("tt", strconv.FormatInt(o.Timetoken, 10))
}
if o.Region != "" {
q.Set("tr", o.Region)
}
if o.FilterExpression != "" {
q.Set("filter-expr", utils.UrlEncode(o.FilterExpression))
}
// hb timeout should be at least 4 seconds
if o.Heartbeat >= 4 {
q.Set("heartbeat", fmt.Sprintf("%d", o.Heartbeat))
}
if o.stringState != "" {
q.Set("state", o.stringState)
}
return q, nil
}
func (o *subscribeOpts) buildBody() ([]byte, error) {
return []byte{}, nil
}
func (o *subscribeOpts) httpMethod() string {
return "GET"
}
func (o *subscribeOpts) isAuthRequired() bool {
return true
}
func (o *subscribeOpts) requestTimeout() int {
return o.pubnub.Config.SubscribeRequestTimeout
}
func (o *subscribeOpts) connectTimeout() int {
return o.pubnub.Config.ConnectTimeout
}
func (o *subscribeOpts) operationType() OperationType {
return PNSubscribeOperation
}
func (o *subscribeOpts) telemetryManager() *TelemetryManager {
return o.pubnub.telemetryManager
}