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automod: mentions spike rule (#482)
Introduce a simple new rule for detecting and flagging spikes of
mentions within a period.
+39
+1
automod/rules/all.go
+1
automod/rules/all.go
+38
automod/rules/mentions.go
+38
automod/rules/mentions.go
···
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package rules
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import (
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appbsky "github.com/bluesky-social/indigo/api/bsky"
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"github.com/bluesky-social/indigo/automod"
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)
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var _ automod.PostRuleFunc = DistinctMentionsRule
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var mentionHourlyThreshold = 20
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// DistinctMentionsRule looks for accounts which mention an unusually large number of distinct accounts per period.
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func DistinctMentionsRule(evt *automod.RecordEvent, post *appbsky.FeedPost) error {
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did := evt.Account.Identity.DID.String()
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// Increment counters for all new mentions in this post.
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var newMentions bool
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for _, facet := range post.Facets {
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for _, feature := range facet.Features {
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mention := feature.RichtextFacet_Mention
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if mention == nil {
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continue
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}
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evt.IncrementDistinct("mentions", did, mention.Did)
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newMentions = true
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}
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}
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// If there were any new mentions, check if it's gotten spammy.
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if !newMentions {
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return nil
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}
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if mentionHourlyThreshold <= evt.GetCountDistinct("mentions", did, automod.PeriodHour) {
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evt.AddAccountFlag("high-distinct-mentions")
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}
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return nil
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}