feat(aa): add the hat struct.

pkg/aa/blocks.go

@@ -0,0 +1,39 @@
+// apparmor.d - Full set of apparmor profiles
+// Copyright (C) 2021-2024 Alexandre Pujol <alexandre@pujol.io>
+// SPDX-License-Identifier: GPL-2.0-only
+
+package aa
+
+const (
+	tokHAT   = "hat"
+	tokCARET = "^"
+)
+
+// Hat represents a single AppArmor hat.
+type Hat struct {
+	RuleBase
+	Name  string
+	Rules Rules
+}
+
+func (p *Hat) Less(other any) bool {
+	o, _ := other.(*Hat)
+	return p.Name < o.Name
+}
+
+func (p *Hat) Equals(other any) bool {
+	o, _ := other.(*Profile)
+	return p.Name == o.Name
+}
+
+func (p *Hat) String() string {
+	return renderTemplate(p.Kind(), p)
+}
+
+func (p *Hat) Constraint() constraint {
+	return blockKind
+}
+
+func (p *Hat) Kind() string {
+	return tokHAT
+}