Initial version of web intents registry

chrome/browser/intents/web_intents_registry.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/intents/web_intents_registry.h"
+#include "chrome/browser/webdata/web_data_service.h"
+
+// Internal object representing all data associated with a single query.
+struct WebIntentsRegistry::IntentsQuery {
+  // Unique query identifier.
+  QueryID query_id_;
+
+  // Underlying data query.
+  WebDataService::Handle pending_query_;
+
+  // the consumer for this particular query.
+  Consumer* consumer_;
+
+  // TODO(groby): Additional filter data will go here - filtering is handled
+  // per query.
+};
+
+WebIntentsRegistry::WebIntentsRegistry() : next_query_id_(0) {}
+
+WebIntentsRegistry::~WebIntentsRegistry() {
+  // Cancel all pending queries, since we can't handle them any more.
+  for (QueryMap::iterator it(queries.begin()); it != queries.end(); ++it) {
+    wds_->CancelRequest(it->first);
+    delete it->second;
+  }
+}
+
+void WebIntentsRegistry::Initialize(scoped_refptr<WebDataService> wds) {
+  wds_ = wds;
+}
+
+void WebIntentsRegistry::OnWebDataServiceRequestDone(
+    WebDataService::Handle h,
+    const WDTypedResult* result) {
+  DCHECK(result);
+  DCHECK(result->GetType() == WEB_INTENTS_RESULT);
+
+  QueryMap::iterator it = queries.find(h);
+  DCHECK(it != queries.end());
+
+  IntentsQuery* query(it->second);
+  DCHECK(query);
+  queries.erase(it);
+
+  // TODO(groby): Filtering goes here.
+  std::vector<WebIntentData> intents = static_cast<
+      const WDResult<std::vector<WebIntentData> >*>(result)->GetValue();
+
+  query->consumer_->OnIntentsQueryDone(query->query_id_, intents);
+}
+
+WebIntentsRegistry::QueryID WebIntentsRegistry::GetIntentProviders(
+    const string16& action,
+    Consumer* consumer) {
+  DCHECK(consumer);
+  DCHECK(wds_.get());
+
+  IntentsQuery* query = new IntentsQuery;
+  query->query_id_ = next_query_id_++;
+  query->consumer_ = consumer;
+  query->pending_query_ = wds_->GetWebIntents(action, this);
+  queries[query->pending_query_] = query;
+
+  return query->query_id_;
+}
+
+void WebIntentsRegistry::RegisterIntentProvider(const WebIntentData& intent) {
+  DCHECK(wds_.get());
+  wds_->AddWebIntent(intent);
+}
+
+void WebIntentsRegistry::UnregisterIntentProvider(const WebIntentData& intent) {
+  DCHECK(wds_.get());
+  wds_->RemoveWebIntent(intent);
+}