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// Copyright (c) 2009 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 CHROME_BROWSER_WEB_RESOURCE_WEB_RESOURCE_SERVICE_H_
#define CHROME_BROWSER_WEB_RESOURCE_WEB_RESOURCE_SERVICE_H_
#include <string>
#include "chrome/browser/utility_process_host.h"
#include "chrome/common/pref_service.h"
#include "chrome/common/web_resource/web_resource_unpacker.h"
class Profile;
class WebResourceService
: public UtilityProcessHost::Client {
public:
WebResourceService(Profile* profile,
MessageLoop* backend_loop);
~WebResourceService();
// Sleep until cache needs to be updated, but always for at least 5 seconds
// so we don't interfere with startup. Then begin updating resources.
void StartAfterDelay();
// We have successfully pulled data from a resource server; now launch
// the process that will parse the JSON, and then update the cache.
void UpdateResourceCache(const std::string& json_data);
// Right now, these values correspond to data pulled from the popgadget
// JSON feed. Once we have decided on the final format for the
// web resources servers, these will probably change.
static const wchar_t* kWebResourceTitle;
static const wchar_t* kWebResourceURL;
// Default server from which to gather resources.
// For now, hard-coded to test JSON data hosted on chromium.org.
// Starting 6/22, poptart server will be ready to host data.
// Future: more servers and different kinds of data will be served.
static const wchar_t* kDefaultResourceServer;
private:
class WebResourceFetcher;
friend class WebResourceFetcher;
class UnpackerClient;
void Init();
// Set in_fetch_ to false, clean up temp directories (in the future).
void EndFetch();
// Puts parsed json data in the right places, and writes to prefs file.
void OnWebResourceUnpacked(const ListValue& parsed_json);
// We need to be able to load parsed resource data into preferences file,
// and get proper install directory.
PrefService* prefs_;
FilePath web_resource_dir_;
// Server from which we are currently pulling web resource data.
std::wstring web_resource_server_;
// Whenever we update resource cache, schedule another task.
MessageLoop* backend_loop_;
WebResourceFetcher* web_resource_fetcher_;
ResourceDispatcherHost* resource_dispatcher_host_;
// Gets mutable dictionary attached to user's preferences, so that we
// can write resource data back to user's pref file.
DictionaryValue* web_resource_cache_;
// True if we are currently mid-fetch. If we are asked to start a fetch
// when we are still fetching resource data, schedule another one in
// kCacheUpdateDelay time, and silently exit.
bool in_fetch_;
// Maximum number of cached resources available.
static const int kMaxResourceCacheSize = 6;
// Delay on first fetch so we don't interfere with startup.
static const int kStartResourceFetchDelay = 5000;
// Delay between calls to update the cache (4 hours).
static const int kCacheUpdateDelay = 4 * 60 * 60 * 1000;
// Name of directory inside the profile where we will store resource-related
// data (for now, thumbnail images).
static const char* kResourceDirectoryName;
DISALLOW_COPY_AND_ASSIGN(WebResourceService);
};
#endif // CHROME_BROWSER_WEB_RESOURCE_WEB_RESOURCE_SERVICE_H_
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