[iOS] Upstream //ios/chrome/browser/ui/commands changes

ios/chrome/browser/ui/commands/show_signin_command.h

+// 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 IOS_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_
+#define IOS_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_
+
+#import <Foundation/Foundation.h>
+
+#include "ios/chrome/browser/authentication/constants.h"
+#include "ios/chrome/browser/ui/commands/generic_chrome_command.h"
+
+typedef void (^ShowSigninCommandCompletionCallback)(BOOL succeeded,
+                                                    BOOL profileWasSwapped);
+
+enum AuthenticationOperation {
+  // Operation to cancel the current authentication operation and dismiss any
+  // UI presented by this operation.
+  AUTHENTICATION_OPERATION_DISMISS,
+
+  // Operation to start a re-authenticate operation. The user is presented with
+  // the SSOAuth re-authenticate web page.
+  AUTHENTICATION_OPERATION_REAUTHENTICATE,
+
+  // Operation to start a sign-in operation. The user is presented with the
+  // SSOAuth sign in page (SSOAuth account picker or SSOAuth sign-in web page).
+  AUTHENTICATION_OPERATION_SIGNIN,
+};
+
+// A command to perform a sign in operation.
+@interface ShowSigninCommand : GenericChromeCommand
+
+// Mark inherited initializer as unavailable to prevent calling it by mistake.
+- (instancetype)initWithTag:(NSInteger)tag NS_UNAVAILABLE;
+
+// Initializes a command to perform the specified operation with a
+// SigninInteractionController and invoke a possibly-nil callback when finished.
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                     signInSource:(SignInSource)signInSource
+                         callback:(ShowSigninCommandCompletionCallback)callback
+    NS_DESIGNATED_INITIALIZER;
+
+// Initializes a ShowSigninCommand with a nil callback.
+- (instancetype)initWithOperation:(AuthenticationOperation)operation
+                     signInSource:(SignInSource)signInSource;
+
+// The callback to be invoked after the operation is complete.
+@property(nonatomic, readonly) ShowSigninCommandCompletionCallback callback;
+
+// The operation to perform during the sign-in flow.
+@property(nonatomic, readonly) AuthenticationOperation operation;
+
+// The source of this authentication operation.
+@property(nonatomic, readonly) SignInSource signInSource;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_COMMANDS_SHOW_SIGNIN_COMMAND_H_