Created paring flow interface for controller side.

chromeos/pairing/controller_pairing_flow.h

Index: chromeos/pairing/controller_pairing_flow.h
diff --git a/chromeos/pairing/controller_pairing_flow.h b/chromeos/pairing/controller_pairing_flow.h
new file mode 100644
index 0000000000000000000000000000000000000000..ea25c0d826e5291b2996a3fcffb1c2c208c7409b
--- /dev/null
+++ b/chromeos/pairing/controller_pairing_flow.h
@@ -0,0 +1,109 @@
+// Copyright 2014 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 CHROMEOS_PAIRING_CONTROLLER_PAIRING_FLOW_H_
+#define CHROMEOS_PAIRING_CONTROLLER_PAIRING_FLOW_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+class UserContext;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace chromeos {
+
+class CHROMEOS_EXPORT ControllerPairingFlow {
+ public:
+  enum Stage {
+    STAGE_NONE,
+    STAGE_DEVICES_DISCOVERY,
+    STAGE_DEVICE_NOT_FOUND,
+    STAGE_ESTABLISHING_CONNECTION,
+    STAGE_ESTABLISHING_CONNECTION_ERROR,
+    STAGE_WAITING_FOR_CODE_CONFIRMATION,
+    STAGE_HOST_UPDATE_IN_PROGRESS,
+    STAGE_HOST_CONNECTION_LOST,
+    STAGE_WAITING_FOR_CREDENTIALS,
+    STAGE_HOST_ENROLLMENT_IN_PROGRESS,
+    STAGE_HOST_ENROLLMENT_ERROR,
+    STAGE_PAIRING_DONE,
+    STAGE_STARTING_SESSION,
+    STAGE_FINISHED
+  };
+
+  class Observer {
+   public:
+    Observer();
+    virtual ~Observer();
+
+    // Called when flow has moved on from one stage to another.
+    virtual void PairingStageChanged(Stage new_stage) = 0;
+
+    // Called when new device was discovered or existing device was lost.
+    // This notification is made only on |STAGE_SCANNING_FOR_DEVICES| stage.
+    virtual void DiscoveredDevicesListChanged() = 0;
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(Observer);
+  };
+
+  typedef std::string DeviceID;

[stevenjb, 2014/06/02 16:35:57]

I think that typdefing to a string adds more potential confusion than it
removes. It would however be reasonable to typedef std::vector<std::string> to
something like DeviceIdList.

[dzhioev (left Google), 2014/06/02 19:58:26]

Done.

+
+ public:

[stevenjb, 2014/06/02 16:35:57]

Remove duplicate 'public'

[dzhioev (left Google), 2014/06/02 19:58:26]

Done.

+  ControllerPairingFlow();
+  virtual ~ControllerPairingFlow();
+
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Returns current stage of flow.
+  virtual Stage GetCurrentStage() = 0;
+
+  // Starts pairing flow. Can be called only on |STAGE_NONE| stage.
+  virtual void StartFlow() = 0;
+
+  // Returns list of discovered devices. Can be called only on
+  // |STAGE_DEVICES_DISCOVERY| stage.
+  virtual std::vector<DeviceID> GetDiscoveredDevices() = 0;
+
+  // This method is called to start pairing with the device having |device_id|
+  // ID. Can be called only on |STAGE_DEVICES_DISCOVERY| stage.
+  virtual void ChooseDeviceForPairing(const DeviceID& device_id) = 0;
+
+  // Rescan for devices to pair with. Can be called only on
+  // |STAGE_DEVICE_NOT_FOUND| stage.
+  virtual void RepeatDiscovery() = 0;
+
+  // Returns pairing confirmation code.
+  // Could be called only on |STATE_WAITING_FOR_CODE_CONFIRMATION| stage.
+  virtual std::string GetConfirmationCode() = 0;
+
+  // Called to confirm or deny confirmation code. Can be called only on
+  // |STAGE_WAITING_FOR_CODE_CONFIRMATION| stage.
+  virtual void SetConfirmationCodeIsRight(bool right) = 0;

[stevenjb, 2014/06/02 16:35:57]

s/Right/Correct/

[dzhioev (left Google), 2014/06/02 19:58:26]

Done.

+
+  // Called when user successfully authenticated on GAIA page. Can be called
+  // only on |STAGE_WAITING_FOR_CREDENTIALS| stage.
+  virtual void OnAuthenticationDone(
+      const chromeos::UserContext& user_context,
+      content::BrowserContext* browser_context) = 0;
+
+  // Installs app and starts session.
+  // Can be called only on |STAGE_PAIRING_DONE| stage.
+  virtual void StartSession() = 0;

[stevenjb, 2014/06/02 16:35:57]

WS

[dzhioev (left Google), 2014/06/02 19:58:26]

Done.

+ private:
+  DISALLOW_COPY_AND_ASSIGN(ControllerPairingFlow);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_PAIRING_CONTROLLER_PAIRING_FLOW_H_