text: // 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 "extensions/common/event_matcher.h"
  
  #include "extensions/common/event_filtering_info.h"
  
  namespace {
  const char kUrlFiltersKey[] = "url";
  }
  
  namespace extensions {
  
  EventMatcher::EventMatcher(scoped_ptr<base::DictionaryValue> filter)
      : filter_(filter.Pass()) {
  }
  
  EventMatcher::~EventMatcher() {
  }
  
  bool EventMatcher::MatchNonURLCriteria(
      const EventFilteringInfo& event_info) const {
    if (!event_info.has_instance_id())
      return true;
    return event_info.instance_id() == GetInstanceID();
  }
  
  int EventMatcher::GetURLFilterCount() const {
    base::ListValue* url_filters = NULL;
    if (filter_->GetList(kUrlFiltersKey, &url_filters))
      return url_filters->GetSize();
    return 0;
  }
  
  bool EventMatcher::GetURLFilter(int i, base::DictionaryValue** url_filter_out) {
    base::ListValue* url_filters = NULL;
    if (filter_->GetList(kUrlFiltersKey, &url_filters)) {
      return url_filters->GetDictionary(i, url_filter_out);
    }
    return false;
  }
  
  int EventMatcher::HasURLFilters() const {
    return GetURLFilterCount() != 0;
  }
  
  int EventMatcher::GetInstanceID() const {
    int instance_id = 0;
    filter_->GetInteger("instanceId", &instance_id);
    return instance_id;
  }
  
  }  // namespace extensions
  