Revert of Move the files related to Android<->Web credentials to a separate folder.

components/password_manager/core/browser/facet_manager.h

+// Copyright 2015 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_FACET_MANAGER_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_FACET_MANAGER_H_
+
+#include <set>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+#include "components/password_manager/core/browser/affiliation_service.h"
+#include "components/password_manager/core/browser/affiliation_utils.h"
+
+namespace base {
+class Clock;
+class TaskRunner;
+}  // namespace base
+
+namespace password_manager {
+
+class FacetManagerHost;
+
+// Encapsulates the state and logic required for handling affiliation requests
+// concerning a single facet. The AffiliationBackend owns one instance for each
+// facet that requires attention, and it itself implements the FacetManagerHost
+// interface to provide shared functionality needed by all FacetManagers.
+class FacetManager {
+ public:
+  using StrategyOnCacheMiss = AffiliationService::StrategyOnCacheMiss;
+
+  // Both the |backend| and |clock| must outlive this object.
+  FacetManager(const FacetURI& facet_uri,
+               FacetManagerHost* backend,
+               base::Clock* clock);
+  ~FacetManager();
+
+  // Facet-specific implementations for methods in AffiliationService of the
+  // same name. See documentation in affiliation_service.h for details:
+  void GetAffiliations(
+      StrategyOnCacheMiss cache_miss_strategy,
+      const AffiliationService::ResultCallback& callback,
+      const scoped_refptr<base::TaskRunner>& callback_task_runner);
+  void Prefetch(const base::Time& keep_fresh_until);
+  void CancelPrefetch(const base::Time& keep_fresh_until);
+
+  // Called when |affiliation| information regarding this facet has just been
+  // fetched from the Affiliation API.
+  void OnFetchSucceeded(const AffiliatedFacetsWithUpdateTime& affiliation);
+
+  // Called by the backend when the time specified in RequestNotificationAtTime
+  // has come to pass, so that |this| can perform delayed administrative tasks.
+  void NotifyAtRequestedTime();
+
+  // Returns whether this instance has becomes redundant, that is, it has no
+  // more meaningful state than a newly created instance would have.
+  bool CanBeDiscarded() const;
+
+  // Returns whether or not cached data for this facet can be discarded without
+  // harm when trimming the database.
+  bool CanCachedDataBeDiscarded() const;
+
+  // Returns whether or not affiliation information relating to this facet needs
+  // to be fetched right now.
+  bool DoesRequireFetch() const;
+
+  // The members below are made public for the sake of tests.
+
+  // Returns whether or not cached data for this facet is fresh (not stale).
+  bool IsCachedDataFresh() const;
+
+  // Returns whether or not cached data for this facet is near-stale or stale.
+  bool IsCachedDataNearStale() const;
+
+  // The duration after which cached affiliation data is considered near-stale.
+  static const int kCacheSoftExpiryInHours;
+
+  // The duration after which cached affiliation data is considered stale.
+  static const int kCacheHardExpiryInHours;
+
+ private:
+  struct RequestInfo;
+
+  // Returns the time when the cached data for this facet will become stale.
+  // The data is considered stale with the returned time value inclusive.
+  base::Time GetCacheHardExpiryTime() const;
+
+  // Returns the time when cached data for this facet becomes near-stale.
+  // The data is considered near-stale with the returned time value inclusive.
+  base::Time GetCacheSoftExpiryTime() const;
+
+  // Returns the maximum of |keep_fresh_thresholds_|, or the NULL time if the
+  // set is empty.
+  base::Time GetMaximumKeepFreshUntilThreshold() const;
+
+  // Returns the next time affiliation data for this facet needs to be fetched
+  // due to active prefetch requests, or base::Time::Max() if not at all.
+  base::Time GetNextRequiredFetchTimeDueToPrefetch() const;
+
+  // Posts the callback of the request described by |request_info| with success.
+  static void ServeRequestWithSuccess(const RequestInfo& request_info,
+                                      const AffiliatedFacets& affiliation);
+
+  // Posts the callback of the request described by |request_info| with failure.
+  static void ServeRequestWithFailure(const RequestInfo& request_info);
+
+  FacetURI facet_uri_;
+  FacetManagerHost* backend_;
+  base::Clock* clock_;
+
+  // The last time affiliation information was fetched for this facet, i.e. the
+  // freshness of the data in the cache. If there is no corresponding data in
+  // the database, this will contain the NULL time. Otherwise, the update time
+  // in the database should match this value; it is stored to reduce disk I/O.
+  base::Time last_update_time_;
+
+  // Contains information about the GetAffiliations() requests that are waiting
+  // for the result of looking up this facet.
+  std::vector<RequestInfo> pending_requests_;
+
+  // Keeps track of |keep_fresh_until| thresholds corresponding to Prefetch()
+  // requests for this facet. Affiliation information for this facet must be
+  // kept fresh by periodic refetches until at least the maximum time in this
+  // set (exclusive).
+  //
+  // This is not a single timestamp but rather a multiset so that cancellation
+  // of individual prefetches can be supported even if there are two requests
+  // with the same |keep_fresh_until| threshold.
+  std::multiset<base::Time> keep_fresh_until_thresholds_;
+
+  DISALLOW_COPY_AND_ASSIGN(FacetManager);
+};
+
+}  // namespace password_manager
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_FACET_MANAGER_H_