// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_COMMON_PERMISSIONS_SOCKET_PERMISSION_ENTRY_H_
#define EXTENSIONS_COMMON_PERMISSIONS_SOCKET_PERMISSION_ENTRY_H_

#include <string>
#include <tuple>
#include <vector>

#include "content/public/common/socket_permission_request.h"
#include "ipc/param_traits.h"

namespace extensions {

// Internal representation of a socket permission for a specific operation, such
// as UDP "bind", host 127.0.0.1, port *.
class SocketPermissionEntry {
 public:
  enum HostType { ANY_HOST, HOSTS_IN_DOMAINS, SPECIFIC_HOSTS, };

  SocketPermissionEntry();
  ~SocketPermissionEntry();

  friend auto operator<=>(const SocketPermissionEntry& a,
                          const SocketPermissionEntry& b) {
    return std::tie(a.pattern_.type, a.pattern_.host, a.match_subdomains_,
                    a.pattern_.port) <=>
           std::tie(b.pattern_.type, b.pattern_.host, b.match_subdomains_,
                    b.pattern_.port);
  }

  friend bool operator==(const SocketPermissionEntry& a,
                         const SocketPermissionEntry& b) {
    return std::tie(a.pattern_.type, a.pattern_.host, a.match_subdomains_,
                    a.pattern_.port) ==
           std::tie(b.pattern_.type, b.pattern_.host, b.match_subdomains_,
                    b.pattern_.port);
  }

  bool Check(const content::SocketPermissionRequest& request) const;

  // Parse a host:port pattern for a given operation type.
  //   <pattern> := '' |
  //                <host> |
  //                ':' <port> |
  //                <host> ':' <port> |
  //
  //   <host> := '*' |
  //             '*.' <anychar except '/' and '*'>+ |
  //             <anychar except '/' and '*'>+
  //
  //   <port> := '*' |
  //             <port number between 0 and 65535>)
  static bool ParseHostPattern(
      content::SocketPermissionRequest::OperationType type,
      const std::string& pattern,
      SocketPermissionEntry* entry);

  static bool ParseHostPattern(
      content::SocketPermissionRequest::OperationType type,
      const std::vector<std::string>& pattern_tokens,
      SocketPermissionEntry* entry);

  // Returns true if the permission type can be bound to a host or port.
  bool IsAddressBoundType() const;

  std::string GetHostPatternAsString() const;
  HostType GetHostType() const;

  const content::SocketPermissionRequest& pattern() const { return pattern_; }
  bool match_subdomains() const { return match_subdomains_; }

 private:
  // Friend so ParamTraits can serialize us.
  friend struct IPC::ParamTraits<SocketPermissionEntry>;

  // The permission type, host and port.
  content::SocketPermissionRequest pattern_;

  // True if there was a wildcard in the host name.
  bool match_subdomains_;
};

}  // namespace extensions

#endif  // EXTENSIONS_COMMON_PERMISSIONS_SOCKET_PERMISSION_ENTRY_H_