chore(cedar): Add protobuf types

Makefile

@@ -0,0 +1,9 @@
+.PHONY: protos clean
+
+protos:
+	buf lint
+	buf generate
+	cd packages/cedar; dart format .
+
+clean:
+	rm -rf packages/cedar/lib/src/proto

buf.gen.yaml

@@ -0,0 +1,21 @@
+version: v2
+managed:
+  enabled: true
+  override:
+    - file_option: go_package
+      value: github.com/celest-dev/corks/go/proto/dart;dartoptionspb
+      path: dart/dart_options.proto
+    - file_option: go_package_prefix
+      value: github.com/celest-dev/corks/go/proto
+  disable:
+    - path: google
+inputs:
+  - directory: proto
+  - directory: third_party
+    paths:
+      - third_party/dart/dart_options.proto
+plugins:
+  - remote: buf.build/protocolbuffers/dart:v21.1.2
+    include_imports: true
+    include_wkt: true
+    out: packages/cedar/lib/src/proto

buf.yaml

@@ -0,0 +1,13 @@
+version: v2
+modules:
+  - path: proto
+  - path: third_party
+breaking:
+  use:
+    - PACKAGE
+lint:
+  use:
+    - MINIMAL
+  ignore:
+    - third_party
+  disallow_comment_ignores: true

packages/cedar/analysis_options.yaml

@@ -1 +1,7 @@
 include: package:lints/recommended.yaml
+
+analyzer:
+  exclude:
+    - lib/src/proto/**/*.pb.dart
+    - lib/src/proto/**/*.pbenum.dart
+    - lib/src/proto/**/*.pbjson.dart

packages/cedar/lib/src/ast/annotation.dart

@@ -1,6 +1,8 @@
 import 'dart:collection';
 
 import 'package:cedar/ast.dart';
+import 'package:cedar/src/proto/cedar/v3/policy.pb.dart' as pb;
+import 'package:collection/collection.dart';
 
 final class Annotations with IterableMixin<Annotation> {
   Annotations(this.annotations);
@@ -9,6 +11,10 @@ final class Annotations with IterableMixin<Annotation> {
     return Annotations(json.cast());
   }
 
+  factory Annotations.fromProto(pb.Annotations annotations) {
+    return Annotations(annotations.annotations);
+  }
+
   final Map<String, String> annotations;
 
   operator [](String key) => annotations[key];
@@ -43,6 +49,19 @@ final class Annotations with IterableMixin<Annotation> {
   Iterator<Annotation> get iterator => iterable.iterator;
 
   Map<String, String> toJson() => annotations;
+
+  pb.Annotations toProto() {
+    return pb.Annotations(annotations: annotations);
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Annotations &&
+          const MapEquality().equals(annotations, other.annotations);
+
+  @override
+  int get hashCode => const MapEquality().hash(annotations);
 }
 
 Annotations annotation(String key, String value) {