fix: remove duplicate classes from nested routers (#28)

Author: ferrarafer

lib/src/generators/router/generator/arguments_class/arguments_class_builder.dart

@@ -23,8 +23,9 @@ class ArgumentsClassBuilder {
         (b) => b
           ..name = argumentsBuilderHelper.argumentClassName
           ..fields.addAll(argumentsBuilderHelper.convertParametersToClassFields)
-          ..constructors
-              .add(argumentsBuilderHelper.argumentConstructer(emitter))
+          ..constructors.add(
+            argumentsBuilderHelper.argumentConstructer(emitter),
+          )
           ..methods.addAll([
             Method(
               (b) => b
@@ -40,7 +41,8 @@ class ArgumentsClassBuilder {
               fields: argumentsBuilderHelper.convertParametersToClassFields,
             ),
             _buildHashCode(
-                argumentsBuilderHelper.convertParametersToClassFields),
+              argumentsBuilderHelper.convertParametersToClassFields,
+            ),
           ]),
       );
     });
@@ -50,30 +52,38 @@ class ArgumentsClassBuilder {
 Method _buildHashCode(List<Field> fields) {
   final buffer = StringBuffer();
   buffer.writeln(
-      'return ${fields.map((f) => '${f.name}.hashCode').join(' ^ ')};');
+    'return ${fields.map((f) => '${f.name}.hashCode').join(' ^ ')};',
+  );
 
-  return Method((b) => b
-    ..name = 'hashCode'
-    ..returns = refer('int')
-    ..annotations.add(refer('override'))
-    ..type = MethodType.getter
-    ..body = Code(buffer.toString().trim()));
+  return Method(
+    (b) => b
+      ..name = 'hashCode'
+      ..returns = refer('int')
+      ..annotations.add(refer('override'))
+      ..type = MethodType.getter
+      ..body = Code(buffer.toString().trim()),
+  );
 }
 
-Method _buildEqualityOperator(
-    {required String className, required List<Field> fields}) {
+Method _buildEqualityOperator({
+  required String className,
+  required List<Field> fields,
+}) {
   final buffer = StringBuffer();
   buffer.writeln('if (identical(this, other)) return $literalTrue;');
   buffer.writeln(
-      'return ${fields.map((f) => 'other.${f.name} == ${f.name}').join(' && ')};');
+    'return ${fields.map((f) => 'other.${f.name} == ${f.name}').join(' && ')};',
+  );
 
-  return Method((b) => b
-    ..name = 'operator =='
-    ..returns = refer('bool')
-    ..annotations.add(refer('override'))
-    ..requiredParameters.add(Parameter((p) => p
-      ..covariant = true
-      ..name = 'other'
-      ..type = refer(className)))
-    ..body = Code(buffer.toString()));
+  return Method(
+    (b) => b
+      ..name = 'operator =='
+      ..returns = refer('bool')
+      ..annotations.add(refer('override'))
+      ..requiredParameters.add(Parameter((p) => p
+        ..covariant = true
+        ..name = 'other'
+        ..type = refer(className)))
+      ..body = Code(buffer.toString()),
+  );
 }

lib/src/generators/router/generator/router_generator.dart

@@ -3,8 +3,8 @@ import 'package:dart_style/dart_style.dart';
 import 'package:stacked_generator/src/generators/base_generator.dart';
 import 'package:stacked_generator/src/generators/extensions/routes_extension.dart';
 import 'package:stacked_generator/src/generators/router/generator/routes_class/routes_class_builder.dart';
+import 'package:stacked_generator/src/generators/router_common/models/router_config.dart';
 
-import '../../router_common/models/router_config.dart';
 import 'arguments_class/arguments_class_builder.dart';
 import 'navigate_extension_class/navigate_extension_class_builder.dart';
 import 'route_allocator.dart';
@@ -17,10 +17,13 @@ class RouterGenerator implements BaseGenerator {
 
   /// Where we store the result of [_generateClasses]
   List<Spec> classes = [];
+
   List<String> notAliasedImports = [];
+
   @override
   String generate() {
     if (_rootRouterConfig.routes.isEmpty) return '';
+
     final emitter = DartEmitter(
       allocator: RouteAllocator(),
       useNullSafetySyntax: true,
@@ -38,13 +41,25 @@ class RouterGenerator implements BaseGenerator {
       routes: _rootRouterConfig.routesIncludingTheirChildren,
     ).build(emitter);
 
+    /// Remove duplicate classes from nested routers
+    List<Class> parsedClasses = [];
+    for (var c in classes) {
+      if (c is! Class) continue;
+
+      if (parsedClasses.any((parsedClass) => parsedClass.name == c.name)) {
+        continue;
+      }
+
+      parsedClasses.add(c);
+    }
+
     final library = Library(
       (b) => b
         ..directives.add(
           // No need to alias this import that's why we're adding it
           Directive.import('package:flutter/material.dart'),
         )
-        ..body.addAll([...classes, navigationExtensionClassBuilder]),
+        ..body.addAll([...parsedClasses, navigationExtensionClassBuilder]),
     );
 
     return DartFormatter().format('${library.accept(emitter)}');
@@ -61,9 +76,9 @@ class RouterGenerator implements BaseGenerator {
     if (routerConfig.routes.isEmpty) return;
 
     final routesClassBuilder = RoutesClassBuilder(
-            routes: routerConfig.routes,
-            routesClassName: routerConfig.routesClassName)
-        .buildRoutesClass();
+      routes: routerConfig.routes,
+      routesClassName: routerConfig.routesClassName,
+    ).buildRoutesClass();
 
     final routerClassBuilder = RouterClassBuilder(
       routesClassName: routerConfig.routesClassName,