twitch-bot/pkg/twitch/eventsub.go
Knut Ahlers 031ad331e4
[eventsub] Fix: Do not retry subscription on collision
resolves #TWITCH-BOT-7

Signed-off-by: Knut Ahlers <knut@ahlers.me>
2024-03-22 21:29:07 +01:00

315 lines
13 KiB
Go

package twitch
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/mitchellh/hashstructure/v2"
"github.com/pkg/errors"
)
// Collection of known EventSub event-types
const (
EventSubEventTypeChannelAdBreakBegin = "channel.ad_break.begin"
EventSubEventTypeChannelFollow = "channel.follow"
EventSubEventTypeChannelPointCustomRewardRedemptionAdd = "channel.channel_points_custom_reward_redemption.add"
EventSubEventTypeChannelHypetrainBegin = "channel.hype_train.begin"
EventSubEventTypeChannelHypetrainProgress = "channel.hype_train.progress"
EventSubEventTypeChannelHypetrainEnd = "channel.hype_train.end"
EventSubEventTypeChannelRaid = "channel.raid"
EventSubEventTypeChannelShoutoutCreate = "channel.shoutout.create"
EventSubEventTypeChannelShoutoutReceive = "channel.shoutout.receive"
EventSubEventTypeChannelUpdate = "channel.update"
EventSubEventTypeChannelPollBegin = "channel.poll.begin"
EventSubEventTypeChannelPollEnd = "channel.poll.end"
EventSubEventTypeChannelPollProgress = "channel.poll.progress"
EventSubEventTypeStreamOffline = "stream.offline"
EventSubEventTypeStreamOnline = "stream.online"
EventSubEventTypeUserAuthorizationRevoke = "user.authorization.revoke"
)
// Collection of topic versions known to the API
const (
EventSubTopicVersion1 = "1"
EventSubTopicVersion2 = "2"
EventSubTopicVersionBeta = "beta"
)
type (
// EventSubCondition defines the condition the subscription should
// listen on - all fields are optional and those defined in the
// EventSub documentation for the given topic should be set
EventSubCondition struct {
BroadcasterUserID string `json:"broadcaster_user_id,omitempty"`
CampaignID string `json:"campaign_id,omitempty"`
CategoryID string `json:"category_id,omitempty"`
ClientID string `json:"client_id,omitempty"`
ExtensionClientID string `json:"extension_client_id,omitempty"`
FromBroadcasterUserID string `json:"from_broadcaster_user_id,omitempty"`
OrganizationID string `json:"organization_id,omitempty"`
RewardID string `json:"reward_id,omitempty"`
ToBroadcasterUserID string `json:"to_broadcaster_user_id,omitempty"`
UserID string `json:"user_id,omitempty"`
ModeratorUserID string `json:"moderator_user_id,omitempty"`
}
// EventSubEventAdBreakBegin contains the payload for an AdBreak event
EventSubEventAdBreakBegin struct {
Duration int64 `json:"duration_seconds"`
Timestamp time.Time `json:"timestamp"`
IsAutomatic bool `json:"is_automatic"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
RequesterUserID string `json:"requester_user_id"`
RequesterUserLogin string `json:"requester_user_login"`
RequesterUserName string `json:"requester_user_name"`
}
// EventSubEventChannelPointCustomRewardRedemptionAdd contains the
// payload for an channel-point redeem event
EventSubEventChannelPointCustomRewardRedemptionAdd struct {
ID string `json:"id"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
UserID string `json:"user_id"`
UserLogin string `json:"user_login"`
UserName string `json:"user_name"`
UserInput string `json:"user_input"`
Status string `json:"status"`
Reward struct {
ID string `json:"id"`
Title string `json:"title"`
Cost int64 `json:"cost"`
Prompt string `json:"prompt"`
} `json:"reward"`
RedeemedAt time.Time `json:"redeemed_at"`
}
// EventSubEventChannelUpdate contains the payload for a channel
// update event
EventSubEventChannelUpdate struct {
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
Title string `json:"title"`
Language string `json:"language"`
CategoryID string `json:"category_id"`
CategoryName string `json:"category_name"`
ContentClassificationLabels []string `json:"content_classification_labels"`
}
// EventSubEventFollow contains the payload for a follow event
EventSubEventFollow struct {
UserID string `json:"user_id"`
UserLogin string `json:"user_login"`
UserName string `json:"user_name"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
FollowedAt time.Time `json:"followed_at"`
}
// EventSubEventHypetrain contains the payload for all three (begin,
// progress and end) hypetrain events. Certain fields are not
// available at all event types
EventSubEventHypetrain struct {
ID string `json:"id"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
Level int64 `json:"level"`
Total int64 `json:"total"`
Progress int64 `json:"progress"` // Only Beginn, Progress
Goal int64 `json:"goal"` // Only Beginn, Progress
TopContributions []struct {
UserID string `json:"user_id"`
UserLogin string `json:"user_login"`
UserName string `json:"user_name"`
Type string `json:"type"`
Total int64 `json:"total"`
} `json:"top_contributions"`
LastContribution *struct { // Only Begin, Progress
UserID string `json:"user_id"`
UserLogin string `json:"user_login"`
UserName string `json:"user_name"`
Type string `json:"type"`
Total int64 `json:"total"`
} `json:"last_contribution,omitempty"`
StartedAt time.Time `json:"started_at"`
ExpiresAt *time.Time `json:"expires_at,omitempty"` // Only Begin, Progress
EndedAt *time.Time `json:"ended_at,omitempty"` // Only End
CooldownEndsAt *time.Time `json:"cooldown_ends_at,omitempty"` // Only End
}
// EventSubEventPoll contains the payload for a poll change event
// (not all fields are present in all poll events, see docs!)
EventSubEventPoll struct {
ID string `json:"id"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
Title string `json:"title"`
Choices []struct {
ID string `json:"id"`
Title string `json:"title"`
ChannelPointsVotes int `json:"channel_points_votes"`
Votes int `json:"votes"`
} `json:"choices"`
ChannelPointsVoting struct {
IsEnabled bool `json:"is_enabled"`
AmountPerVote int `json:"amount_per_vote"`
} `json:"channel_points_voting"`
StartedAt time.Time `json:"started_at"` // begin, progress, end
EndsAt time.Time `json:"ends_at,omitempty"` // begin, progress
Status string `json:"status,omitempty"` // end -- enum(completed, archived, terminated)
EndedAt time.Time `json:"ended_at,omitempty"` // end
}
// EventSubEventRaid contains the payload for a raid event
EventSubEventRaid struct {
FromBroadcasterUserID string `json:"from_broadcaster_user_id"`
FromBroadcasterUserLogin string `json:"from_broadcaster_user_login"`
FromBroadcasterUserName string `json:"from_broadcaster_user_name"`
ToBroadcasterUserID string `json:"to_broadcaster_user_id"`
ToBroadcasterUserLogin string `json:"to_broadcaster_user_login"`
ToBroadcasterUserName string `json:"to_broadcaster_user_name"`
Viewers int64 `json:"viewers"`
}
// EventSubEventShoutoutCreated contains the payload for a shoutout
// created event
EventSubEventShoutoutCreated struct {
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
ModeratorUserID string `json:"moderator_user_id"`
ModeratorUserLogin string `json:"moderator_user_login"`
ModeratorUserName string `json:"moderator_user_name"`
ToBroadcasterUserID string `json:"to_broadcaster_user_id"`
ToBroadcasterUserLogin string `json:"to_broadcaster_user_login"`
ToBroadcasterUserName string `json:"to_broadcaster_user_name"`
ViewerCount int64 `json:"viewer_count"`
StartedAt time.Time `json:"started_at"`
CooldownEndsAt time.Time `json:"cooldown_ends_at"`
TargetCooldownEndsAt time.Time `json:"target_cooldown_ends_at"`
}
// EventSubEventShoutoutReceived contains the payload for a shoutout
// received event
EventSubEventShoutoutReceived struct {
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
FromBroadcasterUserID string `json:"from_broadcaster_user_id"`
FromBroadcasterUserLogin string `json:"from_broadcaster_user_login"`
FromBroadcasterUserName string `json:"from_broadcaster_user_name"`
ViewerCount int64 `json:"viewer_count"`
StartedAt time.Time `json:"started_at"`
}
// EventSubEventStreamOffline contains the payload for a stream
// offline event
EventSubEventStreamOffline struct {
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
}
// EventSubEventStreamOnline contains the payload for a stream
// online event
EventSubEventStreamOnline struct {
ID string `json:"id"`
BroadcasterUserID string `json:"broadcaster_user_id"`
BroadcasterUserLogin string `json:"broadcaster_user_login"`
BroadcasterUserName string `json:"broadcaster_user_name"`
Type string `json:"type"`
StartedAt time.Time `json:"started_at"`
}
// EventSubEventUserAuthorizationRevoke contains the payload for an
// authorization revoke event
EventSubEventUserAuthorizationRevoke struct {
ClientID string `json:"client_id"`
UserID string `json:"user_id"`
UserLogin string `json:"user_login"`
UserName string `json:"user_name"`
}
eventSubSubscription struct {
ID string `json:"id,omitempty"` // READONLY
Status string `json:"status,omitempty"` // READONLY
Type string `json:"type"`
Version string `json:"version"`
Cost int64 `json:"cost,omitempty"` // READONLY
Condition EventSubCondition `json:"condition"`
Transport eventSubTransport `json:"transport"`
CreatedAt time.Time `json:"created_at,omitempty"` // READONLY
}
eventSubTransport struct {
Method string `json:"method"`
Callback string `json:"callback"`
Secret string `json:"secret"`
SessionID string `json:"session_id"`
}
)
// Hash generates a hashstructure hash for the condition for comparison
func (e EventSubCondition) Hash() (string, error) {
h, err := hashstructure.Hash(e, hashstructure.FormatV2, &hashstructure.HashOptions{TagName: "json"})
if err != nil {
return "", errors.Wrap(err, "hashing struct")
}
return fmt.Sprintf("%x", h), nil
}
func (c *Client) createEventSubSubscriptionWebsocket(ctx context.Context, sub eventSubSubscription) (*eventSubSubscription, error) {
return c.createEventSubSubscription(ctx, AuthTypeBearerToken, sub)
}
func (c *Client) createEventSubSubscription(ctx context.Context, auth AuthType, sub eventSubSubscription) (*eventSubSubscription, error) {
var (
buf = new(bytes.Buffer)
resp struct {
Total int64 `json:"total"`
Data []eventSubSubscription `json:"data"`
Pagination struct {
Cursor string `json:"cursor"`
} `json:"pagination"`
}
)
if err := json.NewEncoder(buf).Encode(sub); err != nil {
return nil, errors.Wrap(err, "assemble subscribe payload")
}
if err := c.Request(ctx, ClientRequestOpts{
AuthType: auth,
Body: buf,
Method: http.MethodPost,
OKStatus: http.StatusAccepted,
Out: &resp,
URL: "https://api.twitch.tv/helix/eventsub/subscriptions",
ValidateFunc: func(opts ClientRequestOpts, resp *http.Response) error {
if resp.StatusCode == http.StatusConflict {
// This is fine: We needed that subscription, it exists
return nil
}
// Fallback to default handling
return ValidateStatus(opts, resp)
},
}); err != nil {
return nil, errors.Wrap(err, "executing request")
}
return &resp.Data[0], nil
}