user_agent_matcher.h

// Copyright 2010 Google Inc. All Rights Reserved.

#ifndef PAGESPEED_KERNEL_HTTP_USER_AGENT_MATCHER_H_
#define PAGESPEED_KERNEL_HTTP_USER_AGENT_MATCHER_H_

#include <map>
#include <utility>

#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/fast_wildcard_group.h"
#include "pagespeed/kernel/base/scoped_ptr.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/util/re2.h"

using std::pair;
using std::make_pair;
using std::map;

namespace net_instaweb {

class RequestHeaders;

class UserAgentMatcher {
 public:
  static const char kTestUserAgentWebP[]; 
  static const char kTestUserAgentNoWebP[]; 

  enum DeviceType {
    kDesktop,
    kTablet,
    kMobile,
    kEndOfDeviceType
  };

  UserAgentMatcher();
  virtual ~UserAgentMatcher();

  bool IsIe(const StringPiece& user_agent) const;
  bool IsIe9(const StringPiece& user_agent) const;

  virtual bool SupportsImageInlining(const StringPiece& user_agent) const;
  bool SupportsLazyloadImages(StringPiece user_agent) const;

  virtual DeviceType GetDeviceTypeForUA(const StringPiece& user_agent) const;

  virtual DeviceType GetDeviceTypeForUAAndHeaders(
      const StringPiece& user_agent,
      const RequestHeaders* request_headers) const;

  static StringPiece DeviceTypeString(DeviceType device_type);

  static StringPiece DeviceTypeSuffix(DeviceType device_type);

  bool SupportsJsDefer(const StringPiece& user_agent, bool allow_mobile) const;

  bool LegacyWebp(const StringPiece& user_agent) const;

  bool SupportsWebpLosslessAlpha(const StringPiece& user_agent) const;

  bool SupportsWebpAnimated(const StringPiece& user_agent) const;

  bool SupportsDnsPrefetchUsingRelPrefetch(const StringPiece& user_agent) const;
  bool SupportsDnsPrefetch(const StringPiece& user_agent) const;

  virtual bool IsAndroidUserAgent(const StringPiece& user_agent) const;
  virtual bool IsiOSUserAgent(const StringPiece& user_agent) const;

  virtual bool GetChromeBuildNumber(const StringPiece& user_agent, int* major,
                                    int* minor, int* build, int* patch) const;

  bool UserAgentExceedsChromeAndroidBuildAndPatch(
      const StringPiece& user_agent, int required_build,
      int required_patch) const;

  bool UserAgentExceedsChromeiOSBuildAndPatch(
      const StringPiece& user_agent, int required_build,
      int required_patch) const;

  bool UserAgentExceedsChromeBuildAndPatch(
      const StringPiece& user_agent, int required_build,
      int required_patch) const;

  bool SupportsMobilization(StringPiece user_agent) const;

 private:
  FastWildcardGroup supports_image_inlining_;
  FastWildcardGroup supports_lazyload_images_;
  FastWildcardGroup defer_js_whitelist_;
  FastWildcardGroup defer_js_mobile_whitelist_;
  FastWildcardGroup legacy_webp_;
  FastWildcardGroup supports_webp_lossless_alpha_;
  FastWildcardGroup supports_webp_animated_;
  FastWildcardGroup supports_dns_prefetch_;
  FastWildcardGroup mobile_user_agents_;
  FastWildcardGroup tablet_user_agents_;
  FastWildcardGroup ie_user_agents_;
  FastWildcardGroup mobilization_user_agents_;

  const RE2 chrome_version_pattern_;
  scoped_ptr<RE2> known_devices_pattern_;
  mutable map <GoogleString, pair<int, int> > screen_dimensions_map_;

  
};

}  

#endif