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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_RENDERER_EXTENSIONS_REQUEST_SENDER_H_
#define CHROME_RENDERER_EXTENSIONS_REQUEST_SENDER_H_
#include <string>
#include <map>
#include "base/memory/linked_ptr.h"
#include "v8/include/v8.h"
namespace base {
class ListValue;
}
namespace extensions {
class ChromeV8Context;
class Dispatcher;
struct PendingRequest;
// Responsible for sending requests for named extension API functions to the
// extension host and routing the responses back to the caller.
class RequestSender {
public:
explicit RequestSender(Dispatcher* dispatcher);
~RequestSender();
// Makes a call to the API function |name| that is to be handled by the
// extension host. The response to this request will be received in
// HandleResponse().
// TODO(koz): Remove |request_id| and generate that internally.
// There are multiple of these per render view though, so we'll
// need to vend the IDs centrally.
void StartRequest(ChromeV8Context* target_context,
const std::string& name,
int request_id,
bool has_callback,
bool for_io_thread,
base::ListValue* value_args);
// Handles responses from the extension host to calls made by StartRequest().
void HandleResponse(int request_id,
bool success,
const base::ListValue& response,
const std::string& error);
// Notifies this that a context is no longer valid.
// TODO(kalman): Do this in a generic/safe way.
void InvalidateContext(ChromeV8Context* context);
private:
typedef std::map<int, linked_ptr<PendingRequest> > PendingRequestMap;
void InsertRequest(int request_id, PendingRequest* pending_request);
linked_ptr<PendingRequest> RemoveRequest(int request_id);
Dispatcher* dispatcher_;
PendingRequestMap pending_requests_;
DISALLOW_COPY_AND_ASSIGN(RequestSender);
};
} // namespace extensions
#endif // CHROME_RENDERER_EXTENSIONS_REQUEST_SENDER_H_
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