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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_COMMON_EXTENSIONS_API_EXTENSION_API_H_
#define CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_
#pragma once
#include <map>
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/singleton.h"
#include "base/values.h"
#include "chrome/common/extensions/feature.h"
#include "chrome/common/extensions/url_pattern_set.h"
namespace base {
class DictionaryValue;
class ListValue;
class Value;
}
class GURL;
class Extension;
class ExtensionPermissionSet;
namespace extensions {
// C++ Wrapper for the JSON API definitions in chrome/common/extensions/api/.
class ExtensionAPI {
public:
// Returns the single instance of this class.
static ExtensionAPI* GetInstance();
// Returns true if |name| is a privileged API path. Privileged paths can only
// be called from extension code which is running in its own designated
// extension process. They cannot be called from extension code running in
// content scripts, or other low-privileged contexts.
bool IsPrivileged(const std::string& name) const;
// Gets the schema for the extension API with namespace |api_name|.
// Ownership remains with this object.
const base::DictionaryValue* GetSchema(const std::string& api_name) const;
// Gets the APIs available to |context| given an |extension| and |url|. The
// extension or URL may not be relevant to all contexts, and may be left
// NULL/empty.
scoped_ptr<std::set<std::string> > GetAPIsForContext(
Feature::Context context,
const Extension* extension,
const GURL& url) const;
private:
friend struct DefaultSingletonTraits<ExtensionAPI>;
ExtensionAPI();
~ExtensionAPI();
// Loads a schema from a resource.
void LoadSchemaFromResource(int resource_id);
// Find an item in |list| with the specified property name and value, or NULL
// if no such item exists.
base::DictionaryValue* FindListItem(const base::ListValue* list,
const std::string& property_name,
const std::string& property_value) const;
// Returns true if the function or event under |namespace_node| with
// the specified |child_name| is privileged, or false otherwise. If the name
// is not found, defaults to privileged.
bool IsChildNamePrivileged(const base::DictionaryValue* namespace_node,
const std::string& child_kind,
const std::string& child_name) const;
// Adds all APIs to |out| that |extension| has any permission (required or
// optional) to use.
void GetAllowedAPIs(
const Extension* extension, std::set<std::string>* out) const;
// Adds dependent schemas to |out| as determined by the "dependencies"
// property.
void ResolveDependencies(std::set<std::string>* out) const;
// Adds any APIs listed in "dependencies" found in the schema for |api_name|
// but not in |excluding| to |out|.
void GetMissingDependencies(
const std::string& api_name,
const std::set<std::string>& excluding,
std::set<std::string>* out) const;
// Removes all APIs from |apis| which are *entirely* privileged. This won't
// include APIs such as "storage" which is entirely unprivileged, nor
// "extension" which has unprivileged components.
void RemovePrivilegedAPIs(std::set<std::string>* apis) const;
// Adds an APIs that match |url| to |out|.
void GetAPIsMatchingURL(const GURL& url, std::set<std::string>* out) const;
static ExtensionAPI* instance_;
// Schemas for each namespace.
typedef std::map<std::string, linked_ptr<const DictionaryValue> > SchemaMap;
SchemaMap schemas_;
// APIs that are entirely unprivileged.
std::set<std::string> completely_unprivileged_apis_;
// APIs that are not entirely unprivileged, but have unprivileged components.
std::set<std::string> partially_unprivileged_apis_;
// APIs that have URL matching permissions.
std::map<std::string, URLPatternSet> url_matching_apis_;
DISALLOW_COPY_AND_ASSIGN(ExtensionAPI);
};
} // extensions
#endif // CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_
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