refactor: share collapse field validation lists (task 387)

1 files changed, 39 insertions, 0 deletions

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)
+}