// 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/files/file_path.h"

class GURL;

namespace appcache {
class AppCacheService;
}

namespace fileapi {
class FileSystemContext;
}

namespace net {
class URLRequestContextGetter;
}

namespace quota {
class QuotaManager;
class SpecialStoragePolicy;
}

namespace webkit_database {
class DatabaseTracker;
}

namespace content {

class BrowserContext;
class IndexedDBContext;
class DOMStorageContext;

// 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 StoragePartition {
 public:
  virtual base::FilePath GetPath() = 0;
  virtual net::URLRequestContextGetter* GetURLRequestContext() = 0;
  virtual net::URLRequestContextGetter* GetMediaURLRequestContext() = 0;
  virtual quota::QuotaManager* GetQuotaManager() = 0;
  virtual appcache::AppCacheService* GetAppCacheService() = 0;
  virtual fileapi::FileSystemContext* GetFileSystemContext() = 0;
  virtual webkit_database::DatabaseTracker* GetDatabaseTracker() = 0;
  virtual DOMStorageContext* GetDOMStorageContext() = 0;
  virtual IndexedDBContext* GetIndexedDBContext() = 0;

  enum RemoveDataMask {
    REMOVE_DATA_MASK_APPCACHE = 1 << 0,
    REMOVE_DATA_MASK_COOKIES = 1 << 1,
    REMOVE_DATA_MASK_FILE_SYSTEMS = 1 << 2,
    REMOVE_DATA_MASK_INDEXEDDB = 1 << 3,
    REMOVE_DATA_MASK_LOCAL_STORAGE = 1 << 4,
    REMOVE_DATA_MASK_SHADER_CACHE = 1 << 5,
    REMOVE_DATA_MASK_WEBSQL = 1 << 6,
    REMOVE_DATA_MASK_WEBRTC_IDENTITY = 1 << 7,
    REMOVE_DATA_MASK_ALL = -1
  };

  enum QuotaManagedStorageMask {
    // Corresponds to quota::kStorageTypeTemporary.
    QUOTA_MANAGED_STORAGE_MASK_TEMPORARY = 1 << 0,

    // Corresponds to quota::kStorageTypePersistent.
    QUOTA_MANAGED_STORAGE_MASK_PERSISTENT = 1 << 1,

    // Corresponds to quota::kStorageTypeSyncable.
    QUOTA_MANAGED_STORAGE_MASK_SYNCABLE = 1 << 2,

    QUOTA_MANAGED_STORAGE_MASK_ALL = -1
  };

  // 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.
  //
  // 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) = 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&,
                              quota::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_