fix notifications

internal/alerts/filter.go

@@ -38,6 +38,32 @@ func FilterActionable(spikes []features.Spike, keepMuted bool, muted map[triage.
 	return out
 }
 
+// DropMuted removes patterns whose issue the user ignored, recomputing each
+// spike's excess and dropping spikes left with nothing to report. A nil
+// muted keeps everything.
+func DropMuted(spikes []features.Spike, muted func(issueID string) bool) []features.Spike {
+	if muted == nil {
+		return spikes
+	}
+	var out []features.Spike
+	for _, sp := range spikes {
+		var kept []features.PatternDelta
+		sp.Excess = 0
+		for _, p := range sp.Patterns {
+			if id := p.Example.IssueFingerprint; id != "" && muted(id) {
+				continue
+			}
+			kept = append(kept, p)
+			sp.Excess += p.Excess
+		}
+		if len(kept) > 0 {
+			sp.Patterns = kept
+			out = append(out, sp)
+		}
+	}
+	return out
+}
+
 // Priority ranks how urgently a pattern needs a human. Client errors (4xx)
 // are the caller's problem more often than ours, so they rank below server
 // failures and count for less when deciding whether to page.