Analysis request `getReachableSources` (#24893).

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 
 import 'package:analysis_server/plugin/analysis/analysis_domain.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_hover.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analysis_server/src/domains/analysis/navigation.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart'
     show
         NavigationOperation,
         OccurrencesOperation,
         sendAnalysisNotificationNavigation;
 import 'package:analysis_server/src/protocol/protocol_internal.dart';
 import 'package:analysis_server/src/protocol_server.dart';
 import 'package:analysis_server/src/services/dependencies/library_dependencies.dart';
+import 'package:analysis_server/src/services/dependencies/reachable_source_collector.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' as engine;
 import 'package:analyzer/src/generated/java_engine.dart' show CaughtException;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/task/model.dart' show ResultDescriptor;
 
 /**
  * Instances of the class [AnalysisDomainHandler] implement a [RequestHandler]
@@ skipping 123 matching lines @@
           if (response != Response.DELAYED_RESPONSE) {
             server.sendResponse(response);
           }
           break;
       }
     });
     // delay response
     return Response.DELAYED_RESPONSE;
   }
 
+  /**
+   * Implement the `analysis.getReachableSources` request.
+   */
+  Response getReachableSources(Request request) {
+    AnalysisGetReachableSourcesParams params =
+        new AnalysisGetReachableSourcesParams.fromRequest(request);
+    ContextSourcePair pair = server.getContextSourcePair(params.file);
+    if (pair.context == null || pair.source == null) {
+      return new Response.getReachableSourcesInvalidFile(request);
+    }
+    Map<String, List<String>> sources = new ReachableSourceCollector(
+        pair.source, pair.context).collectSources();
+    return new AnalysisGetReachableSourcesResult(sources)
+        .toResponse(request.id);
+  }
+
   @override
   Response handleRequest(Request request) {
     try {
       String requestName = request.method;
       if (requestName == ANALYSIS_GET_ERRORS) {
         return getErrors(request);
       } else if (requestName == ANALYSIS_GET_HOVER) {
         return getHover(request);
       } else if (requestName == ANALYSIS_GET_LIBRARY_DEPENDENCIES) {
         return getLibraryDependencies(request);
       } else if (requestName == ANALYSIS_GET_NAVIGATION) {
         return getNavigation(request);
+      } else if (requestName == ANALYSIS_GET_REACHABLE_SOURCES) {
+        return getReachableSources(request);
       } else if (requestName == ANALYSIS_REANALYZE) {
         return reanalyze(request);
       } else if (requestName == ANALYSIS_SET_ANALYSIS_ROOTS) {
         return setAnalysisRoots(request);
       } else if (requestName == ANALYSIS_SET_GENERAL_SUBSCRIPTIONS) {
         return setGeneralSubscriptions(request);
       } else if (requestName == ANALYSIS_SET_PRIORITY_FILES) {
         return setPriorityFiles(request);
       } else if (requestName == ANALYSIS_SET_SUBSCRIPTIONS) {
         return setSubscriptions(request);
@@ skipping 178 matching lines @@
       context.onResultComputed(descriptor).listen((result) {
         StreamController<engine.ComputedResult> controller =
             controllers[result.descriptor];
         if (controller != null) {
           controller.add(result);
         }
       });
     }
   }
 }