mirror of https://git.sr.ht/~ashkeel/strimertul
476 lines
16 KiB
Go
476 lines
16 KiB
Go
package twitch
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"math/rand"
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"sync"
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"text/template"
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"time"
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"github.com/Masterminds/sprig/v3"
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jsoniter "github.com/json-iterator/go"
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"github.com/nicklaw5/helix/v2"
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"github.com/strimertul/strimertul/modules/database"
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)
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const BotAlertsKey = "twitch/bot-modules/alerts/config"
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type eventSubNotification struct {
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Subscription helix.EventSubSubscription `json:"subscription"`
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Challenge string `json:"challenge"`
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Event json.RawMessage `json:"event"`
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}
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type BotAlertsConfig struct {
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Follow struct {
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Enabled bool `json:"enabled"`
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Messages []string `json:"messages"`
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} `json:"follow"`
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Subscription struct {
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Enabled bool `json:"enabled"`
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Messages []string `json:"messages"`
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Variations []struct {
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MinStreak *int `json:"min_streak,omitempty"`
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IsGifted *bool `json:"is_gifted,omitempty"`
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Messages []string `json:"messages"`
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} `json:"variations"`
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} `json:"subscription"`
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GiftSub struct {
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Enabled bool `json:"enabled"`
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Messages []string `json:"messages"`
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Variations []struct {
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MinCumulative *int `json:"min_cumulative,omitempty"`
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IsAnonymous *bool `json:"is_anonymous,omitempty"`
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Messages []string `json:"messages"`
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} `json:"variations"`
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} `json:"gift_sub"`
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Raid struct {
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Enabled bool `json:"enabled"`
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Messages []string `json:"messages"`
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Variations []struct {
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MinViewers *int `json:"min_viewers,omitempty"`
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Messages []string `json:"messages"`
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} `json:"variations"`
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} `json:"raid"`
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Cheer struct {
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Enabled bool `json:"enabled"`
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Messages []string `json:"messages"`
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Variations []struct {
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MinAmount *int `json:"min_amount,omitempty"`
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Messages []string `json:"messages"`
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} `json:"variations"`
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} `json:"cheer"`
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}
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type BotAlertsModule struct {
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Config BotAlertsConfig
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bot *Bot
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mu sync.Mutex
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templates map[string]*template.Template
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}
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func SetupAlerts(bot *Bot) *BotAlertsModule {
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mod := &BotAlertsModule{
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bot: bot,
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mu: sync.Mutex{},
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templates: make(map[string]*template.Template),
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}
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// Load config from database
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err := bot.api.db.GetJSON(BotAlertsKey, &mod.Config)
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if err != nil {
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bot.logger.WithError(err).Debug("config load error")
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mod.Config = BotAlertsConfig{}
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// Save empty config
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bot.api.db.PutJSON(BotAlertsKey, mod.Config)
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}
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mod.compileTemplates()
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go bot.api.db.Subscribe(context.Background(), func(changed []database.ModifiedKV) error {
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for _, kv := range changed {
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if kv.Key == BotAlertsKey {
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err := jsoniter.ConfigFastest.Unmarshal(kv.Data, &mod.Config)
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if err != nil {
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bot.logger.WithError(err).Debug("error reloading timer config")
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} else {
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bot.logger.Info("reloaded timer config")
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}
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mod.compileTemplates()
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}
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}
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return nil
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}, BotAlertsKey)
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// Subscriptions are handled with a slight delay as info come from different events and must be aggregated
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pendingSubs := make(map[string]subMixedEvent)
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pendingMux := sync.Mutex{}
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processPendingSub := func(user string) {
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pendingMux.Lock()
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defer pendingMux.Unlock()
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sub, ok := pendingSubs[user]
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defer delete(pendingSubs, user)
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if !ok {
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// Somehow it's gone? Return early
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return
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}
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// One last check in case config changed
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if !mod.Config.Subscription.Enabled {
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return
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}
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// Assign random message
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messageID := rand.Intn(len(mod.Config.Subscription.Messages))
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tpl, ok := mod.templates[fmt.Sprintf("sub-%d", messageID)]
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// If template is broken, write it as is (soft fail, plus we raise attention I guess?)
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if !ok {
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mod.bot.WriteMessage(mod.Config.Subscription.Messages[messageID])
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return
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}
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// Check for variations, either by streak or gifted
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if sub.IsGift {
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for variationIndex, variation := range mod.Config.Subscription.Variations {
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if variation.IsGifted != nil && *variation.IsGifted {
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// Make sure template is valid
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if temp, ok := mod.templates[fmt.Sprintf("sub-v%d-%d", variationIndex, messageID)]; ok {
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tpl = temp
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break
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}
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}
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}
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} else if sub.DurationMonths > 0 {
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minMonths := -1
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for variationIndex, variation := range mod.Config.Subscription.Variations {
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if variation.MinStreak != nil && sub.DurationMonths >= *variation.MinStreak && sub.DurationMonths >= minMonths {
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// Make sure template is valid
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if temp, ok := mod.templates[fmt.Sprintf("sub-v%d-%d", variationIndex, messageID)]; ok {
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tpl = temp
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minMonths = *variation.MinStreak
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}
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}
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}
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}
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writeTemplate(bot, tpl, sub)
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}
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addPendingSub := func(ev interface{}) {
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switch ev.(type) {
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case helix.EventSubChannelSubscribeEvent:
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sub := ev.(helix.EventSubChannelSubscribeEvent)
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pendingMux.Lock()
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defer pendingMux.Unlock()
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if ev, ok := pendingSubs[sub.UserID]; ok {
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// Already pending, add extra data
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ev.IsGift = sub.IsGift
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pendingSubs[sub.UserID] = ev
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return
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}
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pendingSubs[sub.UserID] = subMixedEvent{
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UserID: sub.UserID,
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UserLogin: sub.UserLogin,
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UserName: sub.UserName,
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BroadcasterUserID: sub.BroadcasterUserID,
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BroadcasterUserLogin: sub.BroadcasterUserLogin,
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BroadcasterUserName: sub.BroadcasterUserName,
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Tier: sub.Tier,
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IsGift: sub.IsGift,
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}
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go func() {
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// Wait a bit to make sure we aggregate all events
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time.Sleep(time.Second * 3)
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processPendingSub(sub.UserID)
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}()
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case helix.EventSubChannelSubscriptionMessageEvent:
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sub := ev.(helix.EventSubChannelSubscriptionMessageEvent)
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pendingMux.Lock()
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defer pendingMux.Unlock()
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if ev, ok := pendingSubs[sub.UserID]; ok {
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// Already pending, add extra data
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ev.StreakMonths = sub.StreakMonths
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ev.DurationMonths = sub.DurationMonths
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ev.CumulativeMonths = sub.CumulativeMonths
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ev.Message = sub.Message
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return
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}
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pendingSubs[sub.UserID] = subMixedEvent{
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UserID: sub.UserID,
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UserLogin: sub.UserLogin,
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UserName: sub.UserName,
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BroadcasterUserID: sub.BroadcasterUserID,
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BroadcasterUserLogin: sub.BroadcasterUserLogin,
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BroadcasterUserName: sub.BroadcasterUserName,
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Tier: sub.Tier,
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StreakMonths: sub.StreakMonths,
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DurationMonths: sub.DurationMonths,
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CumulativeMonths: sub.CumulativeMonths,
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Message: sub.Message,
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}
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go func() {
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// Wait a bit to make sure we aggregate all events
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time.Sleep(time.Second * 3)
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processPendingSub(sub.UserID)
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}()
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}
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}
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go bot.api.db.Subscribe(context.Background(), func(changed []database.ModifiedKV) error {
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for _, kv := range changed {
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if kv.Key == "stulbe/ev/webhook" {
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var ev eventSubNotification
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err := jsoniter.ConfigFastest.Unmarshal(kv.Data, &ev)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing webhook payload")
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continue
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}
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switch ev.Subscription.Type {
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case helix.EventSubTypeChannelFollow:
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// Only process if we care about follows
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if !mod.Config.Follow.Enabled {
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continue
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}
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// Parse as follow event
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var followEv helix.EventSubChannelFollowEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &followEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing follow event")
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continue
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}
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// Pick a random message
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messageID := rand.Intn(len(mod.Config.Follow.Messages))
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// Pick compiled template or fallback to plain text
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if tpl, ok := mod.templates[fmt.Sprintf("follow-%d", messageID)]; ok {
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writeTemplate(bot, tpl, &followEv)
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} else {
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bot.WriteMessage(mod.Config.Follow.Messages[messageID])
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}
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// Compile template and send
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case helix.EventSubTypeChannelRaid:
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// Only process if we care about raids
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if !mod.Config.Raid.Enabled {
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continue
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}
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// Parse as raid event
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var raidEv helix.EventSubChannelRaidEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &raidEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing raid event")
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continue
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}
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// Pick a random message from base set
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messageID := rand.Intn(len(mod.Config.Raid.Messages))
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tpl, ok := mod.templates[fmt.Sprintf("raid-%d", messageID)]
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if !ok {
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// Broken template!
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mod.bot.WriteMessage(mod.Config.Raid.Messages[messageID])
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continue
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}
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// If we have variations, loop through all the available variations and pick the one with the highest minimum viewers that are met
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if len(mod.Config.Raid.Variations) > 0 {
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minViewers := -1
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for variationIndex, variation := range mod.Config.Raid.Variations {
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if variation.MinViewers != nil && *variation.MinViewers > minViewers && raidEv.Viewers >= *variation.MinViewers {
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// Make sure the template is valid
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if varTemplate, ok := mod.templates[fmt.Sprintf("raid-v%d-%d", variationIndex, messageID)]; ok {
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tpl = varTemplate
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minViewers = *variation.MinViewers
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}
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}
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}
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}
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// Compile template and send
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writeTemplate(bot, tpl, &raidEv)
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case helix.EventSubTypeChannelCheer:
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// Only process if we care about bits
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if !mod.Config.Cheer.Enabled {
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continue
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}
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// Parse as cheer event
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var cheerEv helix.EventSubChannelCheerEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &cheerEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing cheer event")
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continue
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}
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// Pick a random message from base set
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messageID := rand.Intn(len(mod.Config.Cheer.Messages))
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tpl, ok := mod.templates[fmt.Sprintf("cheer-%d", messageID)]
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if !ok {
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// Broken template!
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mod.bot.WriteMessage(mod.Config.Raid.Messages[messageID])
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continue
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}
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// If we have variations, loop through all the available variations and pick the one with the highest minimum amount that is met
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if len(mod.Config.Cheer.Variations) > 0 {
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minAmount := -1
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for variationIndex, variation := range mod.Config.Cheer.Variations {
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if variation.MinAmount != nil && *variation.MinAmount > minAmount && cheerEv.Bits >= *variation.MinAmount {
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// Make sure the template is valid
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if varTemplate, ok := mod.templates[fmt.Sprintf("cheer-v%d-%d", variationIndex, messageID)]; ok {
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tpl = varTemplate
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minAmount = *variation.MinAmount
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}
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}
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}
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}
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// Compile template and send
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writeTemplate(bot, tpl, &cheerEv)
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case helix.EventSubTypeChannelSubscription:
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// Only process if we care about subscriptions
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if !mod.Config.Subscription.Enabled {
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continue
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}
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// Parse as subscription event
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var subEv helix.EventSubChannelSubscribeEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &subEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing sub event")
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continue
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}
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addPendingSub(subEv)
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case helix.EventSubTypeChannelSubscriptionMessage:
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// Only process if we care about subscriptions
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if !mod.Config.Subscription.Enabled {
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continue
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}
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// Parse as subscription event
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var subEv helix.EventSubChannelSubscriptionMessageEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &subEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing sub event")
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continue
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}
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addPendingSub(subEv)
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case helix.EventSubTypeChannelSubscriptionGift:
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// Only process if we care about gifted subs
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if !mod.Config.GiftSub.Enabled {
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continue
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}
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// Parse as gift event
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var giftEv helix.EventSubChannelSubscriptionGiftEvent
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err := jsoniter.ConfigFastest.Unmarshal(ev.Event, &giftEv)
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if err != nil {
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bot.logger.WithError(err).Debug("error parsing raid event")
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continue
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}
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// Pick a random message from base set
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messageID := rand.Intn(len(mod.Config.GiftSub.Messages))
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tpl, ok := mod.templates[fmt.Sprintf("gift-%d", messageID)]
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if !ok {
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// Broken template!
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mod.bot.WriteMessage(mod.Config.GiftSub.Messages[messageID])
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continue
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}
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// If we have variations, loop through all the available variations and pick the one with the highest minimum cumulative total that are met
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if len(mod.Config.GiftSub.Variations) > 0 {
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if giftEv.IsAnonymous {
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for variationIndex, variation := range mod.Config.GiftSub.Variations {
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if variation.IsAnonymous != nil && *variation.IsAnonymous {
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// Make sure template is valid
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if temp, ok := mod.templates[fmt.Sprintf("gift-v%d-%d", variationIndex, messageID)]; ok {
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tpl = temp
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break
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}
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}
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}
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} else if giftEv.CumulativeTotal > 0 {
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minCumulative := -1
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for variationIndex, variation := range mod.Config.GiftSub.Variations {
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if variation.MinCumulative != nil && *variation.MinCumulative > minCumulative && giftEv.CumulativeTotal >= *variation.MinCumulative {
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// Make sure template is valid
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if temp, ok := mod.templates[fmt.Sprintf("gift-v%d-%d", variationIndex, messageID)]; ok {
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tpl = temp
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minCumulative = *variation.MinCumulative
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}
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}
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}
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}
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}
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// Compile template and send
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writeTemplate(bot, tpl, &giftEv)
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}
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}
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}
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return nil
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}, "stulbe/ev/webhook")
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bot.logger.Debug("loaded bot alerts")
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return mod
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}
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func (m *BotAlertsModule) compileTemplates() {
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m.templates = make(map[string]*template.Template)
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for index, msg := range m.Config.Follow.Messages {
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m.addTemplate(fmt.Sprintf("follow-%d", index), msg)
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}
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for index, msg := range m.Config.Subscription.Messages {
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m.addTemplate(fmt.Sprintf("sub-%d", index), msg)
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}
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for varIndex, variation := range m.Config.Subscription.Variations {
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for index, msg := range variation.Messages {
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m.addTemplate(fmt.Sprintf("sub-v%d-%d", varIndex, index), msg)
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}
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}
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for index, msg := range m.Config.Raid.Messages {
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m.addTemplate(fmt.Sprintf("raid-%d", index), msg)
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}
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for varIndex, variation := range m.Config.Raid.Variations {
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for index, msg := range variation.Messages {
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m.addTemplate(fmt.Sprintf("raid-v%d-%d", varIndex, index), msg)
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}
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}
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for index, msg := range m.Config.Cheer.Messages {
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m.addTemplate(fmt.Sprintf("cheer-%d", index), msg)
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}
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for varIndex, variation := range m.Config.Cheer.Variations {
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for index, msg := range variation.Messages {
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m.addTemplate(fmt.Sprintf("cheer-v%d-%d", varIndex, index), msg)
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}
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}
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for index, msg := range m.Config.GiftSub.Messages {
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m.addTemplate(fmt.Sprintf("gift-%d", index), msg)
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}
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for varIndex, variation := range m.Config.GiftSub.Variations {
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for index, msg := range variation.Messages {
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m.addTemplate(fmt.Sprintf("gift-v%d-%d", varIndex, index), msg)
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}
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}
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}
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func (m *BotAlertsModule) addTemplate(id string, msg string) {
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tpl, err := template.New("").Funcs(sprig.TxtFuncMap()).Parse(msg)
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if err != nil {
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m.bot.logger.WithError(err).Error("error compiling template")
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return
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}
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m.templates[id] = tpl
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}
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func writeTemplate(bot *Bot, tpl *template.Template, data interface{}) {
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var buf bytes.Buffer
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err := tpl.Execute(&buf, data)
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if err != nil {
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bot.logger.WithError(err).Error("error executing template for alert")
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return
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}
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bot.WriteMessage(buf.String())
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}
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type subMixedEvent struct {
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UserID string
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UserLogin string
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UserName string
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BroadcasterUserID string
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BroadcasterUserLogin string
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BroadcasterUserName string
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Tier string
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IsGift bool
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CumulativeMonths int
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StreakMonths int
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DurationMonths int
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Message helix.EventSubMessage
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}
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