From cc4edee087143d656fc74067297f3f540b61362e Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Fri, 6 Mar 2026 16:04:43 +0200
Subject: refactor: share collapse field validation lists (task 387)

---
 internal/collapse/fields.go | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 internal/collapse/fields.go

(limited to 'internal/collapse')

diff --git a/internal/collapse/fields.go b/internal/collapse/fields.go
new file mode 100644
index 0000000..b87fe11
--- /dev/null
+++ b/internal/collapse/fields.go
@@ -0,0 +1,39 @@
+package collapse
+
+import "slices"
+
+var validFields = []string{
+	"path",
+	"comm",
+	"tracepoint",
+	"pid",
+	"tid",
+	"flags",
+}
+
+var validCountFields = []string{
+	"count",
+	"duration",
+	"durationToPrev",
+	"bytes",
+}
+
+// ValidFields returns a copy of supported collapse fields.
+func ValidFields() []string {
+	return slices.Clone(validFields)
+}
+
+// ValidCountFields returns a copy of supported collapse count fields.
+func ValidCountFields() []string {
+	return slices.Clone(validCountFields)
+}
+
+// IsValidField reports whether a collapse field is supported.
+func IsValidField(field string) bool {
+	return slices.Contains(validFields, field)
+}
+
+// IsValidCountField reports whether a collapse count field is supported.
+func IsValidCountField(field string) bool {
+	return slices.Contains(validCountFields, field)
+}
-- 
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