feat: implement InjectGenerator

cherrypick_annotations/lib/cherrypick_annotations.dart

@@ -21,3 +21,4 @@ export 'src/named.dart';
 export 'src/params.dart';
 export 'src/inject.dart';
 export 'src/injectable.dart';
+export 'src/scope.dart';

cherrypick_annotations/lib/src/scope.dart

@@ -0,0 +1,18 @@
+//
+// Copyright 2021 Sergey Penkovsky (sergey.penkovsky@gmail.com)
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//      http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// ignore: camel_case_types
+final class scope {
+  final String? name;
+  const scope(this.name);
+}

cherrypick_generator/lib/inject_generator.dart

@@ -1,6 +1,6 @@
 import 'dart:async';
+import 'package:analyzer/dart/constant/value.dart';
 import 'package:build/build.dart';
-import 'package:collection/collection.dart';
 import 'package:source_gen/source_gen.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:cherrypick_annotations/cherrypick_annotations.dart' as ann;
@@ -11,8 +11,6 @@ class InjectGenerator extends GeneratorForAnnotation<ann.injectable> {
   @override
   FutureOr<String> generateForAnnotatedElement(
       Element element, ConstantReader annotation, BuildStep buildStep) {
-    // Only classes are supported for @module() annotation
-    // Обрабатываются только классы (другие элементы — ошибка)
     if (element is! ClassElement) {
       throw InvalidGenerationSourceError(
         '@injectable() can only be applied to classes.',
@@ -28,30 +26,36 @@ class InjectGenerator extends GeneratorForAnnotation<ann.injectable> {
         .any((m) =>
             m.computeConstantValue()?.type?.getDisplayString() == 'inject'));
 
-    // Генерируем инициализацию для каждого поля с аннотацией @inject()
     final buffer = StringBuffer();
     buffer.writeln('mixin $mixinName {');
     buffer.writeln('  void _inject($className instance) {');
 
     for (final field in injectedFields) {
-      // Получаем имя типа
-      final fieldType = field.type.getDisplayString();
-      // Ищем аннотацию @named
-      final namedAnnotation = field.metadata.firstWhereOrNull(
-        (m) => m.computeConstantValue()?.type?.getDisplayString() == 'named',
-      );
-      String namedParam = '';
-      if (namedAnnotation != null) {
-        final namedValue = namedAnnotation
-            .computeConstantValue()
-            ?.getField('value')
-            ?.toStringValue();
-        if (namedValue != null) {
-          namedParam = "(named: '$namedValue')";
+      String? scopeName;
+      String? namedValue;
+
+      for (final m in field.metadata) {
+        final DartObject? obj = m.computeConstantValue();
+        final type = obj?.type?.getDisplayString();
+        if (type == 'scope') {
+          scopeName = obj?.getField('name')?.toStringValue();
+        } else if (type == 'named') {
+          namedValue = obj?.getField('value')?.toStringValue();
         }
       }
-      buffer.writeln(
-          "    instance.${field.name} = CherryPick.openRootScope().resolve<$fieldType>$namedParam;");
+
+      final String fieldType = field.type.getDisplayString();
+
+      String accessor = (scopeName != null && scopeName.isNotEmpty)
+          ? "CherryPick.openScope(scopeName: '$scopeName').resolve"
+          : "CherryPick.openRootScope().resolve";
+
+      String generic = fieldType != 'dynamic' ? '<$fieldType>' : '';
+      String params = (namedValue != null && namedValue.isNotEmpty)
+          ? "(named: '$namedValue')"
+          : '()';
+
+      buffer.writeln("    instance.${field.name} = $accessor$generic$params;");
     }
 
     buffer.writeln('  }');

examples/postly/lib/app.dart

@@ -11,14 +11,22 @@ part 'app.inject.cherrypick.g.dart';
 
 @injectable()
 class MyApp extends StatelessWidget with _$MyApp {
-  final Scope scope;
   final _appRouter = AppRouter();
 
+  @scope('authZone')
+  @inject()
+  late final String text;
+
+  @scope('authZone')
+  @named('timeout')
+  @inject()
+  late final int timeout;
+
   @named('repo')
   @inject()
   late final PostRepository repository;
 
-  MyApp({super.key, required this.scope});
+  MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

examples/postly/lib/main.dart

@@ -4,8 +4,6 @@ import 'package:postly/app.dart';
 import 'di/app_module.dart';
 
 void main() {
-  final scope = CherryPick.openRootScope();
-  scope.installModules([$AppModule()]);
-
-  runApp(MyApp(scope: scope));
+  CherryPick.openRootScope().installModules([$AppModule()]);
+  runApp(MyApp());
 }