src/components/pairing/fake_controller_pairing_controller.cc

   1 // Copyright 2014 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 "components/pairing/fake_controller_pairing_controller.h"
   6
   7 #include <map>
   8
   9 #include "base/bind.h"
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/rand_util.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/string_split.h"
  15 #include "base/strings/string_util.h"
  16
  17 namespace pairing_chromeos {
  18
  19 FakeControllerPairingController::FakeControllerPairingController(
  20     const std::string& config)
  21     : current_stage_(STAGE_NONE),
  22       should_fail_on_connecting_(false),
  23       connection_lost_begin_(STAGE_NONE),
  24       connection_lost_end_(STAGE_NONE),
  25       enrollment_should_fail_(false) {
  26   ApplyConfig(config);
  27   AddObserver(this);
  28 }
  29
  30 FakeControllerPairingController::~FakeControllerPairingController() {
  31   RemoveObserver(this);
  32 }
  33
  34 void FakeControllerPairingController::ApplyConfig(const std::string& config) {
  35   typedef std::vector<std::string> Tokens;
  36
  37   base::StringPairs kv_pairs;
  38   CHECK(base::SplitStringIntoKeyValuePairs(config, ':', ',', &kv_pairs))
  39       << "Wrong config format.";
  40   std::map<std::string, std::string> dict(kv_pairs.begin(), kv_pairs.end());
  41
  42   if (dict.count("async_duration")) {
  43     int ms = 0;
  44     CHECK(base::StringToInt(dict["async_duration"], &ms))
  45         << "Wrong 'async_duration' format.";
  46     async_duration_ = base::TimeDelta::FromMilliseconds(ms);
  47   } else {
  48     async_duration_ = base::TimeDelta::FromMilliseconds(3000);
  49   }
  50
  51   should_fail_on_connecting_ =
  52       dict.count("fail_connecting") && (dict["fail_connecting"] == "1");
  53
  54   enrollment_should_fail_ =
  55       dict.count("fail_enrollment") && (dict["fail_enrollment"] == "1");
  56
  57   if (dict.count("connection_lost")) {
  58     Tokens lost_begin_end;
  59     CHECK(Tokenize(dict["connection_lost"], "-", &lost_begin_end) == 2)
  60         << "Wrong 'connection_lost' format.";
  61     int begin = 0;
  62     int end = 0;
  63     CHECK(base::StringToInt(lost_begin_end[0], &begin) &&
  64           base::StringToInt(lost_begin_end[1], &end))
  65         << "Wrong 'connection_lost' format.";
  66     CHECK((begin == 0 && end == 0) ||
  67           (STAGE_WAITING_FOR_CODE_CONFIRMATION <= begin && begin <= end &&
  68            end <= STAGE_HOST_ENROLLMENT_ERROR))
  69         << "Wrong 'connection_lost' interval.";
  70     connection_lost_begin_ = static_cast<Stage>(begin);
  71     connection_lost_end_ = static_cast<Stage>(end);
  72   } else {
  73     connection_lost_begin_ = connection_lost_end_ = STAGE_NONE;
  74   }
  75
  76   if (!dict.count("discovery")) {
  77     dict["discovery"] =
  78         "F-Device_1~F-Device_5~F-Device_3~L-Device_3~L-Device_1~F-Device_1";
  79   }
  80   base::StringPairs events;
  81   CHECK(
  82       base::SplitStringIntoKeyValuePairs(dict["discovery"], '-', '~', &events))
  83       << "Wrong 'discovery' format.";
  84   DiscoveryScenario scenario;
  85   for (const auto& event : events) {
  86     const std::string& type = event.first;
  87     const std::string& device_id = event.second;
  88     CHECK(type == "F" || type == "L" || type == "N")
  89         << "Wrong discovery event type.";
  90     CHECK(!device_id.empty() || type == "N") << "Empty device ID.";
  91     scenario.push_back(DiscoveryEvent(
  92         type == "F" ? DEVICE_FOUND : type == "L" ? DEVICE_LOST : NOTHING_FOUND,
  93         device_id));
  94   }
  95   SetDiscoveryScenario(scenario);
  96
  97   preset_confirmation_code_ = dict["code"];
  98   CHECK(preset_confirmation_code_.empty() ||
  99         (preset_confirmation_code_.length() == 6 &&
 100          preset_confirmation_code_.find_first_not_of("0123456789") ==
 101              std::string::npos))
 102       << "Wrong 'code' format.";
 103 }
 104
 105 void FakeControllerPairingController::SetShouldFailOnConnecting() {
 106   should_fail_on_connecting_ = true;
 107 }
 108
 109 void FakeControllerPairingController::SetShouldLoseConnection(Stage stage_begin,
 110                                                               Stage stage_end) {
 111   connection_lost_begin_ = stage_begin;
 112   connection_lost_end_ = stage_end;
 113 }
 114
 115 void FakeControllerPairingController::SetEnrollmentShouldFail() {
 116   enrollment_should_fail_ = true;
 117 }
 118
 119 void FakeControllerPairingController::SetDiscoveryScenario(
 120     const DiscoveryScenario& discovery_scenario) {
 121   discovery_scenario_ = discovery_scenario;
 122   // Check that scenario is valid.
 123   std::set<std::string> devices;
 124   for (DiscoveryScenario::const_iterator event = discovery_scenario_.begin();
 125        event != discovery_scenario_.end();
 126        ++event) {
 127     switch (event->first) {
 128       case DEVICE_FOUND: {
 129         devices.insert(event->second);
 130         break;
 131       }
 132       case DEVICE_LOST: {
 133         CHECK(devices.count(event->second));
 134         devices.erase(event->second);
 135         break;
 136       }
 137       case NOTHING_FOUND: {
 138         CHECK(++event == discovery_scenario_.end());
 139         return;
 140       }
 141     }
 142   }
 143 }
 144
 145 void FakeControllerPairingController::AddObserver(Observer* observer) {
 146   observers_.AddObserver(observer);
 147 }
 148
 149 void FakeControllerPairingController::RemoveObserver(Observer* observer) {
 150   observers_.RemoveObserver(observer);
 151 }
 152
 153 ControllerPairingController::Stage
 154 FakeControllerPairingController::GetCurrentStage() {
 155   return current_stage_;
 156 }
 157
 158 void FakeControllerPairingController::StartPairing() {
 159   CHECK(current_stage_ == STAGE_NONE);
 160   ChangeStage(STAGE_DEVICES_DISCOVERY);
 161 }
 162
 163 ControllerPairingController::DeviceIdList
 164 FakeControllerPairingController::GetDiscoveredDevices() {
 165   CHECK(current_stage_ == STAGE_DEVICES_DISCOVERY);
 166   return DeviceIdList(discovered_devices_.begin(), discovered_devices_.end());
 167 }
 168
 169 void FakeControllerPairingController::ChooseDeviceForPairing(
 170     const std::string& device_id) {
 171   CHECK(current_stage_ == STAGE_DEVICES_DISCOVERY);
 172   CHECK(discovered_devices_.count(device_id));
 173   choosen_device_ = device_id;
 174   ChangeStage(STAGE_ESTABLISHING_CONNECTION);
 175 }
 176
 177 void FakeControllerPairingController::RepeatDiscovery() {
 178   CHECK(current_stage_ == STAGE_DEVICE_NOT_FOUND ||
 179         current_stage_ == STAGE_ESTABLISHING_CONNECTION_ERROR ||
 180         current_stage_ == STAGE_HOST_ENROLLMENT_ERROR);
 181   ChangeStage(STAGE_DEVICES_DISCOVERY);
 182 }
 183
 184 std::string FakeControllerPairingController::GetConfirmationCode() {
 185   CHECK(current_stage_ == STAGE_WAITING_FOR_CODE_CONFIRMATION);
 186   if (confirmation_code_.empty()) {
 187     if (preset_confirmation_code_.empty()) {
 188       for (int i = 0; i < 6; ++i)
 189         confirmation_code_.push_back(base::RandInt('0', '9'));
 190     } else {
 191       confirmation_code_ = preset_confirmation_code_;
 192     }
 193   }
 194   return confirmation_code_;
 195 }
 196
 197 void FakeControllerPairingController::SetConfirmationCodeIsCorrect(
 198     bool correct) {
 199   CHECK(current_stage_ == STAGE_WAITING_FOR_CODE_CONFIRMATION);
 200   if (correct)
 201     ChangeStage(STAGE_HOST_UPDATE_IN_PROGRESS);
 202   else
 203     ChangeStage(STAGE_DEVICES_DISCOVERY);
 204 }
 205
 206 void FakeControllerPairingController::SetHostConfiguration(
 207     bool accepted_eula,
 208     const std::string& lang,
 209     const std::string& timezone,
 210     bool send_reports,
 211     const std::string& keyboard_layout) {
 212 }
 213
 214 void FakeControllerPairingController::OnAuthenticationDone(
 215     const std::string& domain,
 216     const std::string& auth_token) {
 217   CHECK(current_stage_ == STAGE_WAITING_FOR_CREDENTIALS);
 218   ChangeStage(STAGE_HOST_ENROLLMENT_IN_PROGRESS);
 219 }
 220
 221 void FakeControllerPairingController::StartSession() {
 222   CHECK(current_stage_ == STAGE_HOST_ENROLLMENT_SUCCESS);
 223   ChangeStage(STAGE_FINISHED);
 224 }
 225
 226 void FakeControllerPairingController::ChangeStage(Stage new_stage) {
 227   if (current_stage_ == new_stage)
 228     return;
 229   current_stage_ = new_stage;
 230   FOR_EACH_OBSERVER(Observer, observers_, PairingStageChanged(new_stage));
 231 }
 232
 233 void FakeControllerPairingController::ChangeStageLater(Stage new_stage) {
 234   base::MessageLoop::current()->PostDelayedTask(
 235       FROM_HERE,
 236       base::Bind(&FakeControllerPairingController::ChangeStage,
 237                  base::Unretained(this),
 238                  new_stage),
 239       async_duration_);
 240 }
 241
 242 void FakeControllerPairingController::ExecuteDiscoveryEvent(
 243     size_t event_position) {
 244   if (current_stage_ != STAGE_DEVICES_DISCOVERY)
 245     return;
 246   CHECK(event_position < discovery_scenario_.size());
 247   const DiscoveryEvent& event = discovery_scenario_[event_position];
 248   switch (event.first) {
 249     case DEVICE_FOUND: {
 250       DeviceFound(event.second);
 251       break;
 252     }
 253     case DEVICE_LOST: {
 254       DeviceLost(event.second);
 255       break;
 256     }
 257     case NOTHING_FOUND: {
 258       ChangeStage(STAGE_DEVICE_NOT_FOUND);
 259       break;
 260     }
 261   }
 262   if (++event_position == discovery_scenario_.size()) {
 263     return;
 264   }
 265   base::MessageLoop::current()->PostDelayedTask(
 266       FROM_HERE,
 267       base::Bind(&FakeControllerPairingController::ExecuteDiscoveryEvent,
 268                  base::Unretained(this),
 269                  event_position),
 270       async_duration_);
 271 }
 272
 273 void FakeControllerPairingController::DeviceFound(
 274     const std::string& device_id) {
 275   CHECK(current_stage_ == STAGE_DEVICES_DISCOVERY);
 276   discovered_devices_.insert(device_id);
 277   FOR_EACH_OBSERVER(Observer, observers_, DiscoveredDevicesListChanged());
 278 }
 279
 280 void FakeControllerPairingController::DeviceLost(const std::string& device_id) {
 281   CHECK(current_stage_ == STAGE_DEVICES_DISCOVERY);
 282   discovered_devices_.erase(device_id);
 283   FOR_EACH_OBSERVER(Observer, observers_, DiscoveredDevicesListChanged());
 284 }
 285
 286 void FakeControllerPairingController::PairingStageChanged(Stage new_stage) {
 287   Stage next_stage = STAGE_NONE;
 288   switch (new_stage) {
 289     case STAGE_DEVICES_DISCOVERY: {
 290       discovered_devices_.clear();
 291       base::MessageLoop::current()->PostDelayedTask(
 292           FROM_HERE,
 293           base::Bind(&FakeControllerPairingController::ExecuteDiscoveryEvent,
 294                      base::Unretained(this),
 295                      0),
 296           async_duration_);
 297       break;
 298     }
 299     case STAGE_ESTABLISHING_CONNECTION: {
 300       if (should_fail_on_connecting_) {
 301         next_stage = STAGE_ESTABLISHING_CONNECTION_ERROR;
 302         should_fail_on_connecting_ = false;
 303       } else {
 304         confirmation_code_.clear();
 305         next_stage = STAGE_WAITING_FOR_CODE_CONFIRMATION;
 306       }
 307       break;
 308     }
 309     case STAGE_HOST_UPDATE_IN_PROGRESS: {
 310       next_stage = STAGE_WAITING_FOR_CREDENTIALS;
 311       break;
 312     }
 313     case STAGE_HOST_ENROLLMENT_IN_PROGRESS: {
 314       if (enrollment_should_fail_) {
 315         enrollment_should_fail_ = false;
 316         next_stage = STAGE_HOST_ENROLLMENT_ERROR;
 317       } else {
 318         next_stage = STAGE_HOST_ENROLLMENT_SUCCESS;
 319       }
 320       break;
 321     }
 322     case STAGE_HOST_CONNECTION_LOST: {
 323       next_stage = connection_lost_end_;
 324       connection_lost_end_ = STAGE_NONE;
 325       break;
 326     }
 327     default:
 328       break;
 329   }
 330   if (new_stage == connection_lost_begin_) {
 331     connection_lost_begin_ = STAGE_NONE;
 332     next_stage = STAGE_HOST_CONNECTION_LOST;
 333   }
 334   if (next_stage != STAGE_NONE)
 335     ChangeStageLater(next_stage);
 336 }
 337
 338 void FakeControllerPairingController::DiscoveredDevicesListChanged() {
 339 }
 340
 341 }  // namespace pairing_chromeos