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// 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.
#ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__
#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__
#pragma once
#include "chrome/browser/extensions/api/declarative/rules_registry.h"
#include <map>
#include <set>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
namespace extensions {
// Wrapper class for RulesRegistry objects that takes care that all optional
// fields of rules are filled with valid values.
class InitializingRulesRegistry : public RulesRegistry {
public:
enum Defaults { DEFAULT_PRIORITY = 100 };
explicit InitializingRulesRegistry(scoped_refptr<RulesRegistry> delegate);
// Implementation for RulesRegistry:
virtual std::string AddRules(
const std::string& extension_id,
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) OVERRIDE;
virtual std::string RemoveRules(
const std::string& extension_id,
const std::vector<std::string>& rule_identifiers) OVERRIDE;
virtual std::string RemoveAllRules(
const std::string& extension_id) OVERRIDE;
virtual std::string GetRules(
const std::string& extension_id,
const std::vector<std::string>& rule_identifiers,
std::vector<linked_ptr<RulesRegistry::Rule> >* out) OVERRIDE;
virtual std::string GetAllRules(
const std::string& extension_id,
std::vector<linked_ptr<RulesRegistry::Rule> >* out) OVERRIDE;
virtual void OnExtensionUnloaded(const std::string& extension_id) OVERRIDE;
virtual content::BrowserThread::ID GetOwnerThread() const OVERRIDE;
private:
virtual ~InitializingRulesRegistry();
// Returns whether any existing rule is registered with identifier |rule_id|
// for extension |extension_id|.
bool IsUniqueId(const std::string& extension_id,
const std::string& rule_id) const;
// Creates an ID that is unique within the scope of|extension_id|.
std::string GenerateUniqueId(const std::string& extension_id);
// Verifies that all |rules| have unique IDs or initializes them with
// unique IDs if they don't have one. In case of duplicate IDs, this function
// returns a non-empty error message.
std::string CheckAndFillInOptionalRules(
const std::string& extension_id,
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules);
// Initializes the priority fields in case they have not been set.
void FillInOptionalPriorities(
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules);
// Removes all |identifiers| of |extension_id| from |used_rule_identifiers_|.
void RemoveUsedRuleIdentifiers(const std::string& extension_id,
const std::vector<std::string>& identifiers);
// Same as RemoveUsedRuleIdentifiers but operates on all rules of
// |extension_id|.
void RemoveAllUsedRuleIdentifiers(const std::string& extension_id);
scoped_refptr<RulesRegistry> delegate_;
typedef std::map<std::string, std::set<std::string> > RuleIdentifiersMap;
RuleIdentifiersMap used_rule_identifiers_;
int last_generated_rule_identifier_id_;
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__
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