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net/nqe/network_id.h

 // Copyright 2016 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_NQE_NETWORK_ID_H_
 #define NET_NQE_NETWORK_ID_H_
 
 #include <string>
 #include <tuple>
 
+#include "base/strings/string_number_conversions.h"
 #include "net/base/net_export.h"
 #include "net/base/network_change_notifier.h"
 
 namespace {
+
 const char kValueSeparator[] = ",";
+
+// Parses |connection_type_string| as a NetworkChangeNotifier::ConnectionType.
+// |connection_type_string| must contain the
+// NetworkChangeNotifier::ConnectionType enum as an interger.
+net::NetworkChangeNotifier::ConnectionType ConvertStringToConnectionType(
+    const std::string& connection_type_string) {
+  int connection_type_int =
+      static_cast<int>(net::NetworkChangeNotifier::CONNECTION_UNKNOWN);
+  bool connection_type_available =
+      base::StringToInt(connection_type_string, &connection_type_int);
+
+  if (!connection_type_available || connection_type_int < 0 ||
+      connection_type_int >=
+          static_cast<int>(net::NetworkChangeNotifier::CONNECTION_LAST)) {
+    DCHECK(false);
+    return net::NetworkChangeNotifier::CONNECTION_UNKNOWN;
+  }
+  return static_cast<net::NetworkChangeNotifier::ConnectionType>(
+      connection_type_int);
 }
 
+}  // namespace
+
 namespace net {
 namespace nqe {
 namespace internal {
 
 // NetworkID is used to uniquely identify a network.
 // For the purpose of network quality estimation and caching, a network is
 // uniquely identified by a combination of |type| and
 // |id|. This approach is unable to distinguish networks with
 // same name (e.g., different Wi-Fi networks with same SSID).
 // This is a protected member to expose it to tests.
 struct NET_EXPORT_PRIVATE NetworkID {
+  static NetworkID FromString(const std::string& network_id) {
+    size_t separator_index = network_id.find(kValueSeparator);
+    DCHECK_NE(std::string::npos, separator_index);
+    if (separator_index == std::string::npos) {
+      return NetworkID(NetworkChangeNotifier::CONNECTION_UNKNOWN,
+                       std::string());
+    }
+
+    return NetworkID(
+        ConvertStringToConnectionType(network_id.substr(separator_index + 1)),
+        network_id.substr(0, separator_index));
+  }
   NetworkID(NetworkChangeNotifier::ConnectionType type, const std::string& id)
       : type(type), id(id) {}
   NetworkID(const NetworkID& other) : type(other.type), id(other.id) {}
   ~NetworkID() {}
 
+  bool operator==(const NetworkID& other) const {
+    return type == other.type && id == other.id;
+  }
+
+  bool operator!=(const NetworkID& other) const { return !operator==(other); }
+
   NetworkID& operator=(const NetworkID& other) {
     type = other.type;
     id = other.id;
     return *this;
   }
 
   // Overloaded to support ordered collections.
   bool operator<(const NetworkID& other) const {
     return std::tie(type, id) < std::tie(other.type, other.id);
   }
 
   std::string ToString() const {
-    return id + kValueSeparator +
-           NetworkChangeNotifier::ConnectionTypeToString(type);
+    return id + kValueSeparator + base::IntToString(static_cast<int>(type));
   }
 
   // Connection type of the network.
   NetworkChangeNotifier::ConnectionType type;
 
   // Name of this network. This is set to:
   // - Wi-Fi SSID if the device is connected to a Wi-Fi access point and the
   //   SSID name is available, or
   // - MCC/MNC code of the cellular carrier if the device is connected to a
   //   cellular network, or
   // - "Ethernet" in case the device is connected to ethernet.
   // - An empty string in all other cases or if the network name is not
   //   exposed by platform APIs.
   std::string id;
 };
 
 }  // namespace internal
 }  // namespace nqe
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_