chrome/browser/extensions/api/sessions/session_id.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/extensions/api/sessions/session_id.h"
   6
   7 #include "base/strings/string_number_conversions.h"
   8
   9 namespace extensions {
  10
  11 const char kIdSeparator = '.';
  12
  13 // static
  14 scoped_ptr<SessionId> SessionId::Parse(const std::string& session_id) {
  15   std::string session_tag;
  16
  17   // Populate session_tag if the |session_id| represents a foreign SessionId.
  18   std::size_t separator = session_id.find(kIdSeparator);
  19   if (separator != std::string::npos) {
  20     session_tag = session_id.substr(0, separator);
  21   }
  22
  23   // session_tag will be the empty string for local sessions that have only
  24   // a unique integer as the identifier.
  25   int id;
  26   if (!base::StringToInt(
  27       session_tag.empty() ? session_id : session_id.substr(separator + 1),
  28       &id)) {
  29     return scoped_ptr<SessionId>();
  30   }
  31   return make_scoped_ptr(new SessionId(session_tag, id));
  32 }
  33
  34 SessionId::SessionId(const std::string& session_tag, int id)
  35     : session_tag_(session_tag), id_(id) {
  36 }
  37
  38 bool SessionId::IsForeign() const {
  39   return !session_tag_.empty();
  40 }
  41
  42 std::string SessionId::ToString() const {
  43   return IsForeign() ?
  44       (session_tag_ + kIdSeparator + base::IntToString(id_))
  45       : base::IntToString(id_);
  46 }
  47
  48 }  // namespace extensions