dart/pkg/analysis_server/lib/src/services/correction/fix.dart

// Copyright (c) 2014, 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.

library services.correction.fix;

import 'package:analysis_server/src/protocol.dart' show SourceChange;
import 'package:analysis_server/src/services/correction/fix_internal.dart';
import 'package:analyzer/src/generated/ast.dart';
import 'package:analyzer/src/generated/error.dart';

/**
 * Computes [Fix]s for the given [AnalysisError].
 *
 * Returns the computed [Fix]s, not `null`.
 */
List<Fix> computeFixes(CompilationUnit unit, AnalysisError error) {
  var processor = new FixProcessor(unit, error);
  List<Fix> fixes = processor.compute();
  fixes.sort((Fix a, Fix b) {
    return a.kind.relevance - b.kind.relevance;
  });
  return fixes;
}

/**
 * A description of a single proposed fix for some problem.
 */
class Fix {
  final FixKind kind;
  final SourceChange change;

  Fix(this.kind, this.change);

  @override
  String toString() {
    return '[kind=$kind, change=$change]';
  }
}

/**
 * An enumeration of possible quick fix kinds.
 */
class FixKind {
  static const ADD_ASYNC =
      const FixKind('ADD_ASYNC', 50, "Add 'async' modifier");
  static const ADD_FIELD_FORMAL_PARAMETERS = const FixKind(
      'ADD_FIELD_FORMAL_PARAMETERS', 30, "Add final field formal parameters");
  static const ADD_PACKAGE_DEPENDENCY = const FixKind(
      'ADD_PACKAGE_DEPENDENCY', 50, "Add dependency on package '{0}'");
  static const ADD_SUPER_CONSTRUCTOR_INVOCATION = const FixKind(
      'ADD_SUPER_CONSTRUCTOR_INVOCATION', 50,
      "Add super constructor {0} invocation");
  static const CHANGE_TO = const FixKind('CHANGE_TO', 49, "Change to '{0}'");
  static const CHANGE_TO_STATIC_ACCESS = const FixKind(
      'CHANGE_TO_STATIC_ACCESS', 50, "Change access to static using '{0}'");
  static const CREATE_CLASS =
      const FixKind('CREATE_CLASS', 50, "Create class '{0}'");
  static const CREATE_CONSTRUCTOR =
      const FixKind('CREATE_CONSTRUCTOR', 50, "Create constructor '{0}'");
  static const CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS = const FixKind(
      'CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS', 50,
      "Create constructor for final fields");
  static const CREATE_CONSTRUCTOR_SUPER = const FixKind(
      'CREATE_CONSTRUCTOR_SUPER', 50, "Create constructor to call {0}");
  static const CREATE_FIELD =
      const FixKind('CREATE_FIELD', 51, "Create field '{0}'");
  static const CREATE_FILE =
      const FixKind('CREATE_FILE', 50, "Create file '{0}'");
  static const CREATE_FUNCTION =
      const FixKind('CREATE_FUNCTION', 51, "Create function '{0}'");
  static const CREATE_GETTER =
      const FixKind('CREATE_GETTER', 50, "Create getter '{0}'");
  static const CREATE_LOCAL_VARIABLE =
      const FixKind('CREATE_LOCAL_VARIABLE', 50, "Create local variable '{0}'");
  static const CREATE_METHOD =
      const FixKind('CREATE_METHOD', 50, "Create method '{0}'");
  static const CREATE_MISSING_OVERRIDES = const FixKind(
      'CREATE_MISSING_OVERRIDES', 50, "Create {0} missing override(s)");
  static const CREATE_NO_SUCH_METHOD = const FixKind(
      'CREATE_NO_SUCH_METHOD', 51, "Create 'noSuchMethod' method");
  static const IMPORT_LIBRARY_PREFIX = const FixKind('IMPORT_LIBRARY_PREFIX',
      51, "Use imported library '{0}' with prefix '{1}'");
  static const IMPORT_LIBRARY_PROJECT =
      const FixKind('IMPORT_LIBRARY_PROJECT', 49, "Import library '{0}'");
  static const IMPORT_LIBRARY_SDK =
      const FixKind('IMPORT_LIBRARY_SDK', 49, "Import library '{0}'");
  static const IMPORT_LIBRARY_SHOW =
      const FixKind('IMPORT_LIBRARY_SHOW', 49, "Update library '{0}' import");
  static const INSERT_SEMICOLON =
      const FixKind('INSERT_SEMICOLON', 50, "Insert ';'");
  static const MAKE_CLASS_ABSTRACT =
      const FixKind('MAKE_CLASS_ABSTRACT', 50, "Make class '{0}' abstract");
  static const REMOVE_PARAMETERS_IN_GETTER_DECLARATION = const FixKind(
      'REMOVE_PARAMETERS_IN_GETTER_DECLARATION', 50,
      "Remove parameters in getter declaration");
  static const REMOVE_PARENTHESIS_IN_GETTER_INVOCATION = const FixKind(
      'REMOVE_PARENTHESIS_IN_GETTER_INVOCATION', 50,
      "Remove parentheses in getter invocation");
  static const REMOVE_UNNECASSARY_CAST =
      const FixKind('REMOVE_UNNECASSARY_CAST', 50, "Remove unnecessary cast");
  static const REMOVE_UNUSED_CATCH_CLAUSE = const FixKind(
      'REMOVE_UNUSED_CATCH', 50, "Remove unused 'catch' clause");
  static const REMOVE_UNUSED_CATCH_STACK = const FixKind(
      'REMOVE_UNUSED_CATCH_STACK', 50, "Remove unused stack trace variable");
  static const REMOVE_UNUSED_IMPORT =
      const FixKind('REMOVE_UNUSED_IMPORT', 50, "Remove unused import");
  static const REPLACE_BOOLEAN_WITH_BOOL = const FixKind(
      'REPLACE_BOOLEAN_WITH_BOOL', 50, "Replace 'boolean' with 'bool'");
  static const REPLACE_IMPORT_URI =
      const FixKind('REPLACE_IMPORT_URI', 50, "Replace with '{0}'");
  static const REPLACE_VAR_WITH_DYNAMIC = const FixKind(
      'REPLACE_VAR_WITH_DYNAMIC', 50, "Replace 'var' with 'dynamic'");
  static const REPLACE_RETURN_TYPE_FUTURE = const FixKind(
      'REPLACE_RETURN_TYPE_FUTURE', 50,
      "Return 'Future' from 'async' function");
  static const USE_CONST = const FixKind('USE_CONST', 50, "Change to constant");
  static const USE_EFFECTIVE_INTEGER_DIVISION = const FixKind(
      'USE_EFFECTIVE_INTEGER_DIVISION', 50,
      "Use effective integer division ~/");
  static const USE_EQ_EQ_NULL =
      const FixKind('USE_EQ_EQ_NULL', 50, "Use == null instead of 'is Null'");
  static const USE_NOT_EQ_NULL =
      const FixKind('USE_NOT_EQ_NULL', 50, "Use != null instead of 'is! Null'");

  final name;
  final int relevance;
  final String message;

  const FixKind(this.name, this.relevance, this.message);

  @override
  String toString() => name;
}