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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 /// Generic utility functions. Stuff that should possibly be in core. | 5 /// Generic utility functions. Stuff that should possibly be in core. |
| 6 library utils; | 6 library utils; |
| 7 | 7 |
| 8 import 'dart:async'; | 8 import 'dart:async'; |
| 9 import 'dart:crypto'; | 9 import 'dart:crypto'; |
| 10 import 'dart:isolate'; | 10 import 'dart:isolate'; |
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| 330 | 330 |
| 331 /// Add all key/value pairs from [source] to [destination], overwriting any | 331 /// Add all key/value pairs from [source] to [destination], overwriting any |
| 332 /// pre-existing values. | 332 /// pre-existing values. |
| 333 void mapAddAll(Map destination, Map source) => | 333 void mapAddAll(Map destination, Map source) => |
| 334 source.forEach((key, value) => destination[key] = value); | 334 source.forEach((key, value) => destination[key] = value); |
| 335 | 335 |
| 336 /// Decodes a URL-encoded string. Unlike [decodeUriComponent], this includes | 336 /// Decodes a URL-encoded string. Unlike [decodeUriComponent], this includes |
| 337 /// replacing `+` with ` `. | 337 /// replacing `+` with ` `. |
| 338 String urlDecode(String encoded) => | 338 String urlDecode(String encoded) => |
| 339 decodeUriComponent(encoded.replaceAll("+", " ")); | 339 decodeUriComponent(encoded.replaceAll("+", " ")); |
| 340 | |
| 341 /// Takes a simple data structure (composed of [Map]s, [List]s, scalar objects, | |
| 342 /// and [Future]s) and recursively resolves all the [Future]s contained within. | |
| 343 /// Completes with the fully resolved structure. | |
| 344 Future awaitObject(object) { | |
| 345 // Unroll nested futures. | |
| 346 if (object is Future) return object.then(awaitObject); | |
| 347 if (object is Collection) { | |
| 348 return Future.wait(object.map(awaitObject).toList()); | |
| 349 } | |
| 350 if (object is! Map) return new Future.immediate(object); | |
| 351 | |
| 352 var pairs = <Future<Pair>>[]; | |
| 353 object.forEach((key, value) { | |
| 354 pairs.add(awaitObject(value) | |
| 355 .then((resolved) => new Pair(key, resolved))); | |
| 356 }); | |
| 357 return Future.wait(pairs).then((resolvedPairs) { | |
| 358 var map = {}; | |
| 359 for (var pair in resolvedPairs) { | |
| 360 map[pair.first] = pair.last; | |
| 361 } | |
| 362 return map; | |
| 363 }); | |
| 364 } | |
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