1 // Copyright (c) 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/signedin_devices/id_mapping_helper.h" 6 7 #include "base/rand_util.h" 8 #include "base/strings/string_number_conversions.h" 9 #include "base/values.h" 10 11 #include "chrome/browser/sync/glue/device_info.h" 12 13 using base::DictionaryValue; 14 using base::Value; 15 using browser_sync::DeviceInfo; 16 17 namespace extensions { 18 19 std::string GetPublicIdFromGUID( 20 const base::DictionaryValue& id_mapping, 21 const std::string& guid) { 22 for (DictionaryValue::Iterator it(id_mapping); 23 !it.IsAtEnd(); 24 it.Advance()) { 25 const Value& value = it.value(); 26 std::string guid_in_value; 27 if (!value.GetAsString(&guid_in_value)) { 28 LOG(ERROR) << "Badly formatted dictionary"; 29 continue; 30 } 31 if (guid_in_value == guid) { 32 return it.key(); 33 } 34 } 35 36 return std::string(); 37 } 38 39 std::string GetGUIDFromPublicId( 40 const base::DictionaryValue& id_mapping, 41 const std::string& id) { 42 std::string guid; 43 id_mapping.GetString(id, &guid); 44 return guid; 45 } 46 47 // Finds out a random unused id. First finds a random id. 48 // If the id is in use, increments the id until it finds an unused id. 49 std::string GetRandomId( 50 const DictionaryValue& mapping, 51 int device_count) { 52 // Set the max value for rand to be twice the device count. 53 int max = device_count * 2; 54 int rand_value = base::RandInt(0, max); 55 std::string string_value; 56 const Value *out_value; 57 58 do { 59 string_value = base::IntToString(rand_value); 60 rand_value++; 61 } while (mapping.Get(string_value, &out_value)); 62 63 return string_value; 64 } 65 66 void CreateMappingForUnmappedDevices( 67 std::vector<browser_sync::DeviceInfo*>* device_info, 68 base::DictionaryValue* value) { 69 for (unsigned int i = 0; i < device_info->size(); ++i) { 70 DeviceInfo* device = (*device_info)[i]; 71 std::string local_id = GetPublicIdFromGUID(*value, 72 device->guid()); 73 74 // If the device does not have a local id, set one. 75 if (local_id.empty()) { 76 local_id = GetRandomId(*value, device_info->size()); 77 value->SetString(local_id, device->guid()); 78 } 79 device->set_public_id(local_id); 80 } 81 } 82 83 } // namespace extensions 84
