// Copyright (c) 2011 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 NET_PROXY_PROXY_RESOLVER_JS_BINDINGS_H_
#define NET_PROXY_PROXY_RESOLVER_JS_BINDINGS_H_

#include <string>

#include "base/string16.h"
#include "net/base/net_export.h"

namespace net {

class HostResolver;
class NetLog;
class ProxyResolverErrorObserver;
struct ProxyResolverRequestContext;
class SyncHostResolver;

// Interface for the javascript bindings.
class NET_EXPORT_PRIVATE ProxyResolverJSBindings {
 public:
  ProxyResolverJSBindings() : current_request_context_(NULL) {}

  virtual ~ProxyResolverJSBindings() {}

  // Handler for "alert(message)"
  virtual void Alert(const string16& message) = 0;

  // Handler for "myIpAddress()". Returns true on success and fills
  // |*first_ip_address| with the result.
  virtual bool MyIpAddress(std::string* first_ip_address) = 0;

  // Handler for "myIpAddressEx()". Returns true on success and fills
  // |*ip_address_list| with the result.
  //
  // This is a Microsoft extension to PAC for IPv6, see:
  // http://blogs.msdn.com/b/wndp/archive/2006/07/13/ipv6-pac-extensions-v0-9.aspx

  virtual bool MyIpAddressEx(std::string* ip_address_list) = 0;

  // Handler for "dnsResolve(host)". Returns true on success and fills
  // |*first_ip_address| with the result.
  virtual bool DnsResolve(const std::string& host,
                          std::string* first_ip_address) = 0;

  // Handler for "dnsResolveEx(host)". Returns true on success and fills
  // |*ip_address_list| with the result.
  //
  // This is a Microsoft extension to PAC for IPv6, see:
  // http://blogs.msdn.com/b/wndp/archive/2006/07/13/ipv6-pac-extensions-v0-9.aspx
  virtual bool DnsResolveEx(const std::string& host,
                            std::string* ip_address_list) = 0;

  // Handler for when an error is encountered. |line_number| may be -1
  // if a line number is not applicable to this error.
  virtual void OnError(int line_number, const string16& error) = 0;

  // Called before the thread running the proxy resolver is stopped.
  virtual void Shutdown() = 0;

  // Creates a default javascript bindings implementation that will:
  //   - Send script error messages to both VLOG(1) and the NetLog.
  //   - Send script alert()s to both VLOG(1) and the NetLog.
  //   - Use the provided host resolver to service dnsResolve().
  //
  // Takes ownership of |host_resolver| and |error_observer| (the latter can
  // be NULL).
  static ProxyResolverJSBindings* CreateDefault(
      SyncHostResolver* host_resolver,
      NetLog* net_log,
      ProxyResolverErrorObserver* error_observer);

  // Sets details about the currently executing FindProxyForURL() request.
  void set_current_request_context(
      ProxyResolverRequestContext* current_request_context) {
    current_request_context_ = current_request_context;
  }

  // Retrieves details about the currently executing FindProxyForURL() request.
  ProxyResolverRequestContext* current_request_context() {
    return current_request_context_;
  }

 private:
  ProxyResolverRequestContext* current_request_context_;
};

}  // namespace net

#endif  // NET_PROXY_PROXY_RESOLVER_JS_BINDINGS_H_