pkg/analyzer/lib/src/analysis_options/code_style_options.dart

// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analyzer/dart/analysis/analysis_options.dart';
import 'package:analyzer/dart/analysis/code_style_options.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:collection/collection.dart';

/// The concrete implementation of [CodeStyleOptions].
class CodeStyleOptionsImpl implements CodeStyleOptions {
  /// The analysis options that owns this instance.
  final AnalysisOptions options;

  @override
  final bool useFormatter;

  CodeStyleOptionsImpl(this.options, {required this.useFormatter});

  @override
  bool get addTrailingCommas =>
      options.isLintEnabled('require_trailing_commas');

  @override
  bool get makeLocalsFinal => _isLintEnabled('prefer_final_locals');

  @override
  String get preferredQuoteForStrings => _lintQuote() ?? "'";

  @override
  bool get sortConstructorsFirst => _isLintEnabled('sort_constructors_first');

  @override
  bool get useRelativeUris => _isLintEnabled('prefer_relative_imports');

  @override
  String preferredQuoteForUris(List<ImportDirective> directives) {
    var lintQuote = _lintQuote();
    if (lintQuote != null) {
      return lintQuote;
    }
    var uri = directives.firstOrNull?.uri;
    var doubleQuote = uri is SimpleStringLiteral &&
        uri.literal.value().toString().startsWith('"');
    return doubleQuote ? '"' : "'";
  }

  /// Return `true` if the lint with the given [name] is enabled.
  bool _isLintEnabled(String name) => options.isLintEnabled(name);

  /// Return the preferred lint quote, otherwise `null`.
  String? _lintQuote() => _isLintEnabled("prefer_single_quotes")
      ? "'"
      : _isLintEnabled("prefer_double_quotes")
          ? '"'
          : null;
}