feat(dart/transform): Record Type interfaces

To support interface-based lifecycle methods (angular#2220), we need to be able
to query for the `interface`s a class supports. Record implemented
interfaces to allow mirror-less querying at runtime.

Closes angular#2204

Author: Tim Blasi

modules/angular2/src/transform/common/directive_metadata_reader.dart

@@ -66,8 +66,7 @@ class _DirectiveMetadataVisitor extends Object
         callOnChange: false,
         callOnCheck: false,
         callOnInit: false,
-        callOnAllChangesDone: false
-    );
+        callOnAllChangesDone: false);
   }
 
   @override

modules/angular2/src/transform/directive_processor/rewriter.dart

@@ -192,6 +192,15 @@ class CreateNgDepsVisitor extends Object with SimpleAstVisitor<Object> {
     }
     writer.print(''', 'annotations': ''');
     node.accept(_metaVisitor);
+    if (node.implementsClause != null &&
+        node.implementsClause.interfaces != null &&
+        node.implementsClause.interfaces.isNotEmpty) {
+      writer.print(''', 'interfaces': const [''');
+      node.implementsClause.interfaces.forEach((interface) {
+        writer.print('${interface.name}');
+      });
+      writer.print(']');
+    }
     writer.print('})');
     return null;
   }

modules/angular2/test/transform/directive_metadata_extractor/directive_metadata_files/lifecycle.ng_deps.dart

@@ -2,7 +2,17 @@ library examples.hello_world.index_common_dart.ng_deps.dart;
 
 import 'hello.dart';
 import 'package:angular2/angular2.dart'
-    show bootstrap, Component, Directive, View, NgElement, onChange, onDestroy, onInit, onCheck, onAllChangesDone;
+    show
+        bootstrap,
+        Component,
+        Directive,
+        View,
+        NgElement,
+        onChange,
+        onDestroy,
+        onInit,
+        onCheck,
+        onAllChangesDone;
 
 var _visited = false;
 void initReflector(reflector) {
@@ -13,7 +23,8 @@ void initReflector(reflector) {
       'factory': () => new HelloCmp(),
       'parameters': const [const []],
       'annotations': const [
-        const Component(lifecycle: [onChange, onDestroy, onInit, onCheck, onAllChangesDone])
+        const Component(
+            lifecycle: [onChange, onDestroy, onInit, onCheck, onAllChangesDone])
       ]
     });
 }

modules/angular2/test/transform/directive_processor/all_tests.dart

@@ -42,6 +42,15 @@ void allTests() {
 
   _testNgDeps('should inline `templateUrl`s expressed as adjacent strings.',
       'split_url_expression_files/hello.dart');
+
+  _testNgDeps('should report implemented types as `interfaces`.',
+      'interfaces_files/soup.dart');
+
+  _testNgDeps('should not include transitively implemented types.',
+      'interface_chain_files/soup.dart');
+
+  _testNgDeps('should not include superclasses in `interfaces`.',
+      'superclass_files/soup.dart');
 }
 
 void _testNgDeps(String name, String inputPath,

modules/angular2/test/transform/directive_processor/interface_chain_files/expected/soup.ng_deps.dart

@@ -0,0 +1,17 @@
+library dinner.soup.ng_deps.dart;
+
+import 'soup.dart';
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+var _visited = false;
+void initReflector(reflector) {
+  if (_visited) return;
+  _visited = true;
+  reflector
+    ..registerType(ChangingSoupComponent, {
+      'factory': () => new ChangingSoupComponent(),
+      'parameters': const [],
+      'annotations': const [const Component(selector: '[soup]')],
+      'interfaces': const [PrimaryInterface]
+    });
+}

modules/angular2/test/transform/directive_processor/interface_chain_files/soup.dart

@@ -0,0 +1,12 @@
+library dinner.soup;
+
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+@Component(selector: '[soup]')
+class ChangingSoupComponent implements PrimaryInterface {}
+
+class TernaryInterface {}
+
+class SecondaryInterface implements TernaryInterface {}
+
+class PrimaryInterface implements SecondaryInterface {}

modules/angular2/test/transform/directive_processor/interfaces_files/expected/soup.ng_deps.dart

@@ -0,0 +1,17 @@
+library dinner.soup.ng_deps.dart;
+
+import 'soup.dart';
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+var _visited = false;
+void initReflector(reflector) {
+  if (_visited) return;
+  _visited = true;
+  reflector
+    ..registerType(ChangingSoupComponent, {
+      'factory': () => new ChangingSoupComponent(),
+      'parameters': const [],
+      'annotations': const [const Component(selector: '[soup]')],
+      'interfaces': const [OnChange]
+    });
+}

modules/angular2/test/transform/directive_processor/interfaces_files/soup.dart

@@ -0,0 +1,6 @@
+library dinner.soup;
+
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+@Component(selector: '[soup]')
+class ChangingSoupComponent implements OnChange {}

modules/angular2/test/transform/directive_processor/superclass_files/expected/soup.ng_deps.dart

@@ -0,0 +1,16 @@
+library dinner.soup.ng_deps.dart;
+
+import 'soup.dart';
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+var _visited = false;
+void initReflector(reflector) {
+  if (_visited) return;
+  _visited = true;
+  reflector
+    ..registerType(ChangingSoupComponent, {
+      'factory': () => new ChangingSoupComponent(),
+      'parameters': const [],
+      'annotations': const [const Component(selector: '[soup]')]
+    });
+}

modules/angular2/test/transform/directive_processor/superclass_files/soup.dart

@@ -0,0 +1,10 @@
+library dinner.soup;
+
+import 'package:angular2/src/core/annotations_impl/annotations.dart';
+
+@Component(selector: '[soup]')
+class ChangingSoupComponent extends Super {}
+
+class Iface {}
+
+class Super implements Iface {}