// Copyright (c) 2013, 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 'dart:convert';

import '../command.dart';
import '../log.dart' as log;
import '../source/cached.dart';

/// Handles the `cache list` pub command.
class CacheListCommand extends PubCommand {
  @override
  String get name => 'list';
  @override
  String get description => 'List packages in the system cache.';
  @override
  bool get hidden => true;
  @override
  bool get takesArguments => false;

  @override
  Future<void> runProtected() async {
    // TODO(keertip): Add flag to list packages from non default sources.
    var packagesObj = <String, Map>{};

    var source = cache.defaultSource as CachedSource;
    for (var package in source.getCachedPackages()) {
      var packageInfo = packagesObj.putIfAbsent(package.name, () => {});
      packageInfo[package.version.toString()] = {'location': package.dir};
    }

    // TODO(keertip): Add support for non-JSON format and check for --format
    // flag.
    log.message(jsonEncode({'packages': packagesObj}));
  }
}