text: // 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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_CONSUMER_H_
  #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_CONSUMER_H_
  
  #include <memory>
  #include <vector>
  
  #include "base/task/cancelable_task_tracker.h"
  
  namespace autofill {
  struct PasswordForm;
  }
  
  namespace password_manager {
  
  struct InteractionsStats;
  
  // Reads from the PasswordStore are done asynchronously on a separate
  // thread. PasswordStoreConsumer provides the virtual callback method, which is
  // guaranteed to be executed on this (the UI) thread. It also provides the
  // base::CancelableTaskTracker member, which cancels any outstanding
  // tasks upon destruction.
  class PasswordStoreConsumer {
   public:
    PasswordStoreConsumer();
  
    // Called when the GetLogins() request is finished, with the associated
    // |results|.
    virtual void OnGetPasswordStoreResults(
        std::vector<std::unique_ptr<autofill::PasswordForm>> results) = 0;
  
    // Called when the GetLogins() request is finished, with the associated site
    // statistics.
    virtual void OnGetSiteStatistics(std::vector<InteractionsStats> stats);
  
    // The base::CancelableTaskTracker can be used for cancelling the
    // tasks associated with the consumer.
    base::CancelableTaskTracker* cancelable_task_tracker() {
      return &cancelable_task_tracker_;
    }
  
    base::WeakPtr<PasswordStoreConsumer> GetWeakPtr() {
      return weak_ptr_factory_.GetWeakPtr();
    }
  
    void CancelAllRequests();
  
   protected:
    virtual ~PasswordStoreConsumer();
  
   private:
    base::CancelableTaskTracker cancelable_task_tracker_;
    base::WeakPtrFactory<PasswordStoreConsumer> weak_ptr_factory_;
  };
  
  }  // namespace password_manager
  
  #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_CONSUMER_H_
  