Add default query method to WebIntentsRegistry.

chrome/browser/intents/web_intents_registry.cc

 // Copyright (c) 2012 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 "base/callback.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/intents/default_web_intent_service.h"
 #include "chrome/browser/webdata/web_data_service.h"
 #include "net/base/mime_util.h"
 
 namespace {
 
 // Compares two mime types for equality. Supports wild cards in both
 // |type1| and |type2|. Wild cards are of the form '<type>/*' or '*'.
 bool MimeTypesAreEqual(const string16& type1, const string16& type2) {
   // We don't have a MIME matcher that allows patterns on both sides
   // Instead, we do two comparisons, treating each type in turn as a
@@ skipping 18 matching lines @@
   // The consumer for this particular query.
   Consumer* consumer_;
 
   // The particular action to filter for while searching through extensions.
   // If |action_| is empty, return all extension-provided services.
   string16 action_;
 
   // The MIME type that was requested for this service query.
   // Suppports wild cards.
   string16 type_;
+
+  // The url of the invoking page.
+  GURL url_;

[groby-ooo-7-16, 2012/02/22 01:40:18]

IWYU: #include "googleurl/src/gurl.h"

[Greg Billock, 2012/02/23 23:39:00]

Done.

 };
 
 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,
     ExtensionServiceInterface* extension_service) {
   wds_ = wds;
   extension_service_ = extension_service;
 }
 
 void WebIntentsRegistry::OnWebDataServiceRequestDone(
     WebDataService::Handle h,
     const WDTypedResult* result) {
   DCHECK(result);
+  if (result->GetType() == WEB_INTENTS_DEFAULTS_RESULT) {
+    OnWebDataServiceDefaultsRequestDone(h, result);
+    return;
+  }
   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);
 
   IntentServiceList matching_services = static_cast<
@@ skipping 22 matching lines @@
     if (MimeTypesAreEqual(iter->type, query->type_))
       ++iter;
     else
       iter = matching_services.erase(iter);
   }
 
   query->consumer_->OnIntentsQueryDone(query->query_id_, matching_services);
   delete query;
 }
 
+void WebIntentsRegistry::OnWebDataServiceDefaultsRequestDone(
+    WebDataService::Handle h,
+    const WDTypedResult* result) {
+  QueryMap::iterator it = queries_.find(h);
+  DCHECK(it != queries_.end());
+
+  IntentsQuery* query(it->second);
+  DCHECK(query);
+  queries_.erase(it);
+
+  std::vector<DefaultWebIntentService> services = static_cast<
+      const WDResult<std::vector<DefaultWebIntentService> >*>(result)->
+          GetValue();
+
+  DefaultWebIntentService default_service;
+  std::vector<DefaultWebIntentService>::iterator iter(services.begin());
+  for (; iter != services.end(); ++iter) {
+    if (!MimeTypesAreEqual(iter->type, query->type_)) {
+      continue;
+    }
+    if (!iter->url_pattern.MatchesURL(query->url_)) {
+      continue;
+    }
+
+    // Found a match. If it is better than default_service, use it.
+    // Currently the metric is that if the new value is user-set,
+    // prefer it. If the present value is suppressed, prefer it.
+    // If the new value has a more specific pattern, prefer it.
+    if (default_service.user_date <= 0 && iter->user_date >= 0)

[groby-ooo-7-16, 2012/02/22 01:40:18]

We should probably check if the default service is actually in a loaded
extension, if it's in an extension.

[Greg Billock, 2012/02/23 23:39:00]

Done.

+      default_service = *iter;
+    else if (default_service.suppression > 0 && iter->suppression <= 0)
+      default_service = *iter;
+    else if (default_service.url_pattern.match_all_urls() &&
+             !iter->url_pattern.match_all_urls())
+      default_service = *iter;
+    else if (iter->url_pattern < default_service.url_pattern)
+      default_service = *iter;
+  }
+
+  query->consumer_->OnIntentsDefaultsQueryDone(query->query_id_,
+                                               default_service);
+  delete query;
+}
+
 WebIntentsRegistry::QueryID WebIntentsRegistry::GetIntentServices(
     const string16& action, const string16& mimetype, Consumer* consumer) {
   DCHECK(consumer);
   DCHECK(wds_.get());
 
   IntentsQuery* query = new IntentsQuery;
   query->query_id_ = next_query_id_++;
   query->consumer_ = consumer;
   query->action_ = action;
   query->type_ = mimetype;
@@ skipping 39 matching lines @@
          i != list.end(); ++i) {
       if (*i == service_) {
         callback_.Run(true);
         return;
       }
     }
 
     callback_.Run(false);
   }
 
+  virtual void OnIntentsDefaultsQueryDone(
+      WebIntentsRegistry::QueryID query_id,
+      const DefaultWebIntentService& default_service) {}
+
  private:
   base::Callback<void(bool)> callback_;
   WebIntentServiceData service_;
 };
 
 WebIntentsRegistry::QueryID WebIntentsRegistry::IntentServiceExists(
     const WebIntentServiceData& service,
     const base::Callback<void(bool)>& callback) {
   IntentsQuery* query = new IntentsQuery;
   query->query_id_ = next_query_id_++;
   query->type_ = ASCIIToUTF16("*");
   query->consumer_ = new ServiceCheckConsumer(service, callback);
   query->pending_query_ = wds_->GetWebIntentServicesForURL(
       UTF8ToUTF16(service.service_url.spec()), this);
   queries_[query->pending_query_] = query;
 
   return query->query_id_;
 }
 
+void WebIntentsRegistry::RegisterDefaultIntentService(
+    const DefaultWebIntentService& default_service) {
+  DCHECK(wds_.get());
+  wds_->AddDefaultWebIntentService(default_service);
+}
+
+void WebIntentsRegistry::UnregisterDefaultIntentService(
+    const DefaultWebIntentService& default_service) {
+  DCHECK(wds_.get());
+  wds_->RemoveDefaultWebIntentService(default_service);
+}
+
+WebIntentsRegistry::QueryID WebIntentsRegistry::GetDefaultIntentService(
+    const string16& action,
+    const string16& type,
+    const GURL& invoking_url,
+    Consumer* consumer) {
+  IntentsQuery* query = new IntentsQuery;
+  query->query_id_ = next_query_id_++;

[groby-ooo-7-16, 2012/02/22 01:40:18]

Since we now have three places that build a query, all very similar - should we
have a CreateQuery call?

[Greg Billock, 2012/02/23 23:39:00]

Created some constructors. That condenses things a little, but perhaps at the
cost of transparency... Tell me what you think.

+  query->action_ = action;
+  query->type_ = type;
+  query->url_ = invoking_url;
+  query->consumer_ = consumer;
+  query->pending_query_ =
+      wds_->GetDefaultWebIntentServicesForAction(action, this);
+  queries_[query->pending_query_] = query;

[groby-ooo-7-16, 2012/02/22 01:40:18]

And similarly, a RegisterQuery() for the previous two lines?

[Greg Billock, 2012/02/23 23:39:00]

I don't think that'd buy that much. This looks clearer and about as compact.

+
+  return query->query_id_;
+}
+
 void WebIntentsRegistry::RegisterIntentService(
     const WebIntentServiceData& service) {
   DCHECK(wds_.get());
   wds_->AddWebIntentService(service);
 }
 
 void WebIntentsRegistry::UnregisterIntentService(
     const WebIntentServiceData& service) {
   DCHECK(wds_.get());
   wds_->RemoveWebIntentService(service);
 }