Defined pairing flow interface for host side.

BUG=375191
TEST=none

Review URL: https://codereview.chromium.org/349153004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@279434 0039d316-1c4b-4281-b951-d872f2087c98

chromeos/chromeos.gyp

@@ -361,6 +361,8 @@
         'pairing/fake_controller_pairing_flow.h',
         'pairing/controller_pairing_flow.cc',
         'pairing/controller_pairing_flow.h',
+        'pairing/host_pairing_controller.cc',
+        'pairing/host_pairing_controller.h',
         'process_proxy/process_output_watcher.cc',
         'process_proxy/process_output_watcher.h',
         'process_proxy/process_proxy.cc',

chromeos/pairing/host_pairing_controller.cc

@@ -0,0 +1,16 @@
+// 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.
+
+#include "chromeos/pairing/host_pairing_controller.h"
+
+namespace chromeos {
+
+HostPairingController::HostPairingController() {}
+
+HostPairingController::~HostPairingController() {}
+
+HostPairingController::Observer::Observer() {}
+HostPairingController::Observer::~Observer() {}
+
+}  // namespace chromeos

chromeos/pairing/host_pairing_controller.h

@@ -0,0 +1,76 @@
+// 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_HOST_PAIRING_CONTROLLER_H_
+#define CHROMEOS_PAIRING_HOST_PAIRING_CONTROLLER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+
+class CHROMEOS_EXPORT HostPairingController {
+ public:
+  enum Stage {
+    STAGE_NONE,
+    STAGE_WAITING_FOR_CONTROLLER,
+    STAGE_WAITING_FOR_CODE_CONFIRMATION,
+    STAGE_UPDATING,
+    STAGE_WAITING_FOR_CONTROLLER_AFTER_UPDATE,
+    STAGE_WAITING_FOR_CREDENTIALS,
+    STAGE_ENROLLING,
+    STAGE_ENROLLMENT_ERROR,
+    STAGE_PAIRING_DONE,
+    STAGE_FINISHED
+  };
+
+  struct UpdateProgress {
+    // Number in [0, 1].
+    double progress;
+  };
+
+  class Observer {
+   public:
+    Observer();
+    virtual ~Observer();
+
+    // Called when pairing has moved on from one stage to another.
+    virtual void PairingStageChanged(Stage new_stage) = 0;
+
+    // Called periodically on |STAGE_UPDATING| stage. Current update progress
+    // is stored in |progress|.
+    virtual void UpdateAdvanced(const UpdateProgress& progress) = 0;
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(Observer);
+  };
+
+  HostPairingController();
+  virtual ~HostPairingController();
+
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Returns current stage of pairing process.
+  virtual Stage GetCurrentStage() = 0;
+
+  // Starts pairing process. Can be called only on |STAGE_NONE| stage.
+  virtual void StartPairing() = 0;
+
+  // Returns device name.
+  virtual std::string GetDeviceName() = 0;
+
+  // Returns 6-digit confirmation code. Can be called only on
+  // |STAGE_WAITING_FOR_CODE_CONFIRMATION| stage.
+  virtual std::string GetConfirmationCode() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HostPairingController);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_PAIRING_HOST_PAIRING_CONTROLLER_H_