57 lines
1.9 KiB
Dart
57 lines
1.9 KiB
Dart
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library angular2.src.transform.directive_linker.linker;
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import 'dart:async';
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import 'package:angular2/src/transform/common/logging.dart';
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import 'package:angular2/src/transform/common/names.dart';
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import 'package:angular2/src/transform/common/ngdata.dart';
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import 'package:barback/barback.dart';
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import 'package:code_transformers/assets.dart';
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import 'package:dart_style/dart_style.dart';
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import 'package:path/path.dart' as path;
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Future<String> linkNgDeps(Transform transform, String code, String path) async {
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var commentIdx = code.lastIndexOf('//');
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if (commentIdx < 0) return code;
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var ngData = new NgData.fromJson(code.substring(commentIdx + 2));
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StringBuffer importBuf =
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new StringBuffer(code.substring(0, ngData.importOffset));
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StringBuffer declarationBuf = new StringBuffer(
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code.substring(ngData.importOffset, ngData.registerOffset));
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String tail = code.substring(ngData.registerOffset, commentIdx);
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var ngDeps = await _processNgImports(transform, ngData.imports);
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for (var i = 0; i < ngDeps.length; ++i) {
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importBuf.write('import \'${ngDeps[i]}\' as i${i};');
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declarationBuf.write('i${i}.${SETUP_METHOD_NAME}(${REFLECTOR_VAR_NAME});');
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}
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return '${importBuf}${declarationBuf}${tail}';
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}
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String _toDepsUri(String importUri) =>
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'${path.withoutExtension(importUri)}${DEPS_EXTENSION}';
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bool _isNotDartImport(String importUri) {
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return !importUri.startsWith('dart:');
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}
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Future<List<String>> _processNgImports(
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Transform transform, List<String> imports) async {
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var retVal = <String>[];
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return Future
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.wait(imports.where(_isNotDartImport).map(_toDepsUri).map((ngDepsUri) {
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var importAsset = uriToAssetId(
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transform.primaryInput.id, ngDepsUri, logger, null /* span */);
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return transform.hasInput(importAsset).then((hasInput) {
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if (hasInput) {
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retVal.add(ngDepsUri);
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}
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});
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})).then((_) => retVal);
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}
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