Fix avoid-late if initialized

lib/lints/avoid_late_keyword/avoid_late_keyword_rule.dart

@@ -1,10 +1,11 @@
 import 'package:analyzer/error/listener.dart';
 import 'package:custom_lint_builder/custom_lint_builder.dart';
+import 'package:solid_lints/lints/avoid_late_keyword/models/avoid_late_keyword_parameters.dart';
 import 'package:solid_lints/models/rule_config.dart';
 import 'package:solid_lints/models/solid_lint_rule.dart';
 
 /// A `late` keyword rule which forbids using it to avoid runtime exceptions.
-class AvoidLateKeywordRule extends SolidLintRule {
+class AvoidLateKeywordRule extends SolidLintRule<AvoidLateKeywordParameters> {
   /// The [LintCode] of this lint rule that represents
   /// the error whether we use `late` keyword.
   static const lintName = 'avoid_late_keyword';
@@ -17,6 +18,7 @@ class AvoidLateKeywordRule extends SolidLintRule {
     final rule = RuleConfig(
       configs: configs,
       name: lintName,
+      paramsParser: AvoidLateKeywordParameters.fromJson,
       problemMessage: (_) => 'Avoid using the "late" keyword. '
           'It may result in runtime exceptions.',
     );
@@ -31,8 +33,14 @@ class AvoidLateKeywordRule extends SolidLintRule {
     CustomLintContext context,
   ) {
     context.registry.addVariableDeclaration((node) {
-      if (node.declaredElement?.isLate ?? false) {
+      final initializedDynamically = config.parameters.allowInitialized;
+      final isLateDeclaration = node.declaredElement?.isLate ?? false;
+      final hasInitializer = node.initializer != null;
+
+      if ((!initializedDynamically || !hasInitializer) && isLateDeclaration) {
         reporter.reportErrorForNode(code, node);
+      } else if (initializedDynamically && hasInitializer) {
+        return;
       }
     });
   }

lib/lints/avoid_late_keyword/models/avoid_late_keyword_parameters.dart

@@ -0,0 +1,20 @@
+/// A data model class that represents the "avoid late keyword" input
+/// parameters.
+class AvoidLateKeywordParameters {
+  /// Maximum number of parameters
+  final bool allowInitialized;
+
+  static const _defaultAllowInitialized = false;
+
+  /// Constructor for [AvoidLateKeywordParameters] model
+  const AvoidLateKeywordParameters({
+    required this.allowInitialized,
+  });
+
+  /// Method for creating from json data
+  factory AvoidLateKeywordParameters.fromJson(Map<String, Object?> json) =>
+      AvoidLateKeywordParameters(
+        allowInitialized: json['allow-initialized'] as bool? ??
+            _defaultAllowInitialized,
+      );
+}

lint_test/analysis_options.yaml

@@ -11,7 +11,8 @@ custom_lint:
     - function_lines_of_code:
       max_lines: 50
     - avoid_non_null_assertion
-    - avoid_late_keyword
+    - avoid_late_keyword:
+      allow-initialized: true
     - avoid_global_state
     - avoid_returning_widgets
     - avoid_unnecessary_setstate

lint_test/avoid_late_keyword_test.dart

@@ -5,14 +5,12 @@
 ///
 /// `avoid_late_keyword`
 class AvoidLateKeyword {
-  /// expect_lint: avoid_late_keyword
   late final field1 = 'string';
 
   /// expect_lint: avoid_late_keyword
   late String field2;
 
   void test() {
-    /// expect_lint: avoid_late_keyword
     late final field3 = 'string';
 
     /// expect_lint: avoid_late_keyword