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#include "base/strings/stringprintf.h"
9
10namespace extensions {
11
12const char kIdSeparator = '.';
13
14// static
15scoped_ptr<SessionId> SessionId::Parse(const std::string& session_id) {
16  std::string session_tag;
17
18  // Populate session_tag if the |session_id| represents a foreign SessionId.
19  std::size_t separator = session_id.find(kIdSeparator);
20  if (separator != std::string::npos) {
21    session_tag = session_id.substr(0, separator);
22  }
23
24  // session_tag will be the empty string for local sessions that have only
25  // a unique integer as the identifier.
26  int id;
27  if (!base::StringToInt(
28      session_tag.empty() ? session_id : session_id.substr(separator + 1),
29      &id)) {
30    return scoped_ptr<SessionId>();
31  }
32  return make_scoped_ptr(new SessionId(session_tag, id));
33}
34
35SessionId::SessionId(const std::string& session_tag, int id)
36    : session_tag_(session_tag), id_(id) {
37}
38
39bool SessionId::IsForeign() const {
40  return !session_tag_.empty();
41}
42
43std::string SessionId::ToString() const {
44  return IsForeign() ?
45      (session_tag_ + kIdSeparator + base::StringPrintf("%d", id_))
46      : base::StringPrintf("%d", id_);
47}
48
49}  // namespace extensions
50