// Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_STORAGE_PARTITION_H_
#define CONTENT_PUBLIC_BROWSER_STORAGE_PARTITION_H_

#include <string>

#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/files/file_path.h"
#include "base/time/time.h"
#include "content/common/content_export.h"

class GURL;

namespace base {
class Time;
}

namespace storage {
class FileSystemContext;
}

namespace net {
class URLRequestContextGetter;
}

namespace storage {
class QuotaManager;
class SpecialStoragePolicy;
}

namespace storage {
class DatabaseTracker;
}

namespace content {

class AppCacheService;
class BrowserContext;
class IndexedDBContext;
class DOMStorageContext;
class ServiceWorkerContext;

// Defines what persistent state a child process can access.
//
// The StoragePartition defines the view each child process has of the
// persistent state inside the BrowserContext. This is used to implement
// isolated storage where a renderer with isolated storage cannot see
// the cookies, localStorage, etc., that normal web renderers have access to.
class CONTENT_EXPORT StoragePartition {
 public:
  virtual base::FilePath GetPath() = 0;
  virtual net::URLRequestContextGetter* GetURLRequestContext() = 0;
  virtual net::URLRequestContextGetter* GetMediaURLRequestContext() = 0;
  virtual storage::QuotaManager* GetQuotaManager() = 0;
  virtual AppCacheService* GetAppCacheService() = 0;
  virtual storage::FileSystemContext* GetFileSystemContext() = 0;
  virtual storage::DatabaseTracker* GetDatabaseTracker() = 0;
  virtual DOMStorageContext* GetDOMStorageContext() = 0;
  virtual IndexedDBContext* GetIndexedDBContext() = 0;
  virtual ServiceWorkerContext* GetServiceWorkerContext() = 0;

  static const uint32 REMOVE_DATA_MASK_APPCACHE        = 1 << 0;
  static const uint32 REMOVE_DATA_MASK_COOKIES         = 1 << 1;
  static const uint32 REMOVE_DATA_MASK_FILE_SYSTEMS    = 1 << 2;
  static const uint32 REMOVE_DATA_MASK_INDEXEDDB       = 1 << 3;
  static const uint32 REMOVE_DATA_MASK_LOCAL_STORAGE   = 1 << 4;
  static const uint32 REMOVE_DATA_MASK_SHADER_CACHE    = 1 << 5;
  static const uint32 REMOVE_DATA_MASK_WEBSQL          = 1 << 6;
  static const uint32 REMOVE_DATA_MASK_WEBRTC_IDENTITY = 1 << 7;
  static const uint32 REMOVE_DATA_MASK_SERVICE_WORKERS = 1 << 8;
  static const uint32 REMOVE_DATA_MASK_ALL             = 0xFFFFFFFF;

  // Corresponds to storage::kStorageTypeTemporary.
  static const uint32 QUOTA_MANAGED_STORAGE_MASK_TEMPORARY  = 1 << 0;
  // Corresponds to storage::kStorageTypePersistent.
  static const uint32 QUOTA_MANAGED_STORAGE_MASK_PERSISTENT = 1 << 1;
  // Corresponds to storage::kStorageTypeSyncable.
  static const uint32 QUOTA_MANAGED_STORAGE_MASK_SYNCABLE   = 1 << 2;
  static const uint32 QUOTA_MANAGED_STORAGE_MASK_ALL        = 0xFFFFFFFF;

  // Starts an asynchronous task that does a best-effort clear the data
  // corresponding to the given |remove_mask| and |quota_storage_remove_mask|
  // inside this StoragePartition for the given |storage_origin|.
  // Note session dom storage is not cleared even if you specify
  // REMOVE_DATA_MASK_LOCAL_STORAGE.
  // |callback| is called when data deletion is done or at least the deletion is
  // scheduled.
  //
  // TODO(ajwong): Right now, the embedder may have some
  // URLRequestContextGetter objects that the StoragePartition does not know
  // about.  This will no longer be the case when we resolve
  // http://crbug.com/159193. Remove |request_context_getter| when that bug
  // is fixed.
  virtual void ClearDataForOrigin(uint32 remove_mask,
                                  uint32 quota_storage_remove_mask,
                                  const GURL& storage_origin,
                                  net::URLRequestContextGetter* rq_context,
                                  const base::Closure& callback) = 0;

  // A callback type to check if a given origin matches a storage policy.
  // Can be passed empty/null where used, which means the origin will always
  // match.
  typedef base::Callback<bool(const GURL&, storage::SpecialStoragePolicy*)>
      OriginMatcherFunction;

  // Similar to ClearDataForOrigin().
  // Deletes all data out fo the StoragePartition if |storage_origin| is NULL.
  // |origin_matcher| is present if special storage policy is to be handled,
  // otherwise the callback can be null (base::Callback::is_null() == true).
  // |callback| is called when data deletion is done or at least the deletion is
  // scheduled.
  virtual void ClearData(uint32 remove_mask,
                         uint32 quota_storage_remove_mask,
                         const GURL& storage_origin,
                         const OriginMatcherFunction& origin_matcher,
                         const base::Time begin,
                         const base::Time end,
                         const base::Closure& callback) = 0;

 protected:
  virtual ~StoragePartition() {}
};

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_STORAGE_PARTITION_H_