updated UI, default profile name, check for existing supervised user before create

chrome/browser/ui/webui/signin/signin_supervised_user_import_handler.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 CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_SUPERVISED_USER_IMPORT_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_SUPERVISED_USER_IMPORT_HANDLER_H_
+
+#include <string>
+
+#include "base/callback_list.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/scoped_observer.h"
+#include "base/strings/string16.h"
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+namespace base {
+class DictionaryValue;
+class ListValue;
+}
+
+// Handler for the 'import existing supervised user' dialog.
+class SigninSupervisedUserImportHandler : public content::WebUIMessageHandler {
+ public:
+  SigninSupervisedUserImportHandler();
+  ~SigninSupervisedUserImportHandler() override;
+
+  // WebUIMessageHandler implementation.
+  void RegisterMessages() override;
+
+ private:
+  // Assigns a new |webui_callback_id_|. Ensures that previous in-flight request
+  // has been fulfilled.
+  void AssignWebUICallbackId(const base::ListValue* args);
+
+  // Callback for the "getExistingSupervisedUsers" message.
+  // Checks the sign-in status of the custodian and accordingly
+  // sends an update to the WebUI.
+  void GetExistingSupervisedUsers(const base::ListValue* args);
+
+  void LoadCustodianProfileCallback(Profile* custodian_profile,
+                                     Profile::CreateStatus status);
+
+  // Reject the WebUI callback with an error message.
+  void RejectCallback(const base::string16& error);
+
+  base::string16 GetLocalErorrMessage() const;
+
+  base::string16 GetAuthErorrMessage() const;
+
+  // Sends an array of supervised users to WebUI. Each entry is of the form:
+  //   supervisedProfile = {
+  //     id: "Supervised User ID",
+  //     name: "Supervised User Name",
+  //     iconURL: "chrome://path/to/icon/image",
+  //     onCurrentDevice: true or false,
+  //   }
+  // The array holds all existing supervised users attached to the
+  // custodian's profile which initiated the request.
+  void SendExistingSupervisedUsers(Profile* profile,
+                                   const base::DictionaryValue* dict);
+
+  bool IsAccountConnected(Profile* profile) const;
+  bool HasAuthError(Profile* profile) const;
+
+  // The WebUI callback ID of the last in-flight async request. There is always
+  // only one in-flight such request.
+  std::string webui_callback_id_;
+
+  base::WeakPtrFactory<SigninSupervisedUserImportHandler> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(SigninSupervisedUserImportHandler);
+};
+
+#endif // CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_SUPERVISED_USER_IMPORT_HANDLER_H_