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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_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_
#define CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_
#pragma once
#include <vector>
#include "base/memory/linked_ptr.h"
#include "chrome/common/extensions/extension.h"
class FilePath;
class Version;
// This class is an abstract class for implementing external extensions
// providers.
class ExternalExtensionProviderInterface {
public:
// ExternalExtensionProvider uses this interface to communicate back to the
// caller what extensions are registered, and which |id|, |version| and |path|
// they have. See also VisitRegisteredExtension below. Ownership of |version|
// is not transferred to the visitor. Callers of the methods below must
// ensure that |id| is a valid extension id (use Extension::IdIsValid(id)).
class VisitorInterface {
public:
// Return true if the extension install will proceed. Install will not
// proceed if the extension is already installed from a higher priority
// location.
virtual bool OnExternalExtensionFileFound(
const std::string& id,
const Version* version,
const FilePath& path,
extensions::Extension::Location location,
int creation_flags,
bool mark_acknowledged) = 0;
// Return true if the extension install will proceed. Install might not
// proceed if the extension is already installed from a higher priority
// location.
virtual bool OnExternalExtensionUpdateUrlFound(
const std::string& id,
const GURL& update_url,
extensions::Extension::Location location) = 0;
// Called after all the external extensions have been reported
// through the above two methods. |provider| is a pointer to the
// provider that is now ready (typically this), and the
// implementation of OnExternalProviderReady() should be able to
// safely assert that provider->IsReady().
virtual void OnExternalProviderReady(
const ExternalExtensionProviderInterface* provider) = 0;
protected:
virtual ~VisitorInterface() {}
};
virtual ~ExternalExtensionProviderInterface() {}
// The visitor (ExtensionsService) calls this function before it goes away.
virtual void ServiceShutdown() = 0;
// Enumerate registered extensions, calling
// OnExternalExtension(File|UpdateUrl)Found on the |visitor| object for each
// registered extension found.
virtual void VisitRegisteredExtension() = 0;
// Test if this provider has an extension with id |id| registered.
virtual bool HasExtension(const std::string& id) const = 0;
// Gets details of an extension by its id. Output params will be set only
// if they are not NULL. If an output parameter is not specified by the
// provider type, it will not be changed.
// This function is no longer used outside unit tests.
virtual bool GetExtensionDetails(const std::string& id,
extensions::Extension::Location* location,
scoped_ptr<Version>* version) const = 0;
// Determines if this provider had loaded the list of external extensions
// from its source.
virtual bool IsReady() const = 0;
};
typedef std::vector<linked_ptr<ExternalExtensionProviderInterface> >
ProviderCollection;
#endif // CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_
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