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// Copyright (c) 2010 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_
#pragma once
#include <string>
#include "base/file_path.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/utility_process_host.h"
#include "chrome/common/web_resource/web_resource_unpacker.h"
class Profile;
namespace WebResourceServiceUtil {
// Certain promotions should only be shown to certain classes of users. This
// function will change to reflect each kind of promotion.
bool CanShowPromo(Profile* profile);
} // namespace WebResourceService
class WebResourceService
: public UtilityProcessHost::Client {
public:
explicit WebResourceService(Profile* profile);
// 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);
// Unpack the web resource as a set of tips. Expects json in the form of:
// {
// "lang": "en",
// "topic": {
// "topid_id": "24013",
// "topics": [
// ],
// "answers": [
// {
// "answer_id": "18625",
// "inproduct": "Text here will be shown as a tip",
// },
// ...
// ]
// }
// }
//
// Public for unit testing.
void UnpackTips(const DictionaryValue& parsed_json);
// Unpack the web resource as a custom promo signal. Expects a start and end
// signal, with the promo to be shown in the tooltip of the start signal
// field. Delivery will be in json in the form of:
// {
// "topic": {
// "answers": [
// {
// "answer_id": "1067976",
// "name": "promo_start",
// "question": "",
// "tooltip":
// "Click \u003ca href=http://www.google.com\u003ehere\u003c/a\u003e!",
// "inproduct": "10/8/09 12:00",
// "inproduct_target": null
// },
// {
// "answer_id": "1067976",
// "name": "promo_end",
// "question": "",
// "tooltip": "",
// "inproduct": "10/8/11 12:00",
// "inproduct_target": null
// },
// ...
// ]
// }
// }
//
// Public for unit testing.
void UnpackPromoSignal(const DictionaryValue& parsed_json);
// Unpack the web resource as a custom logo signal. Expects a start and end
// signal. Delivery will be in json in the form of:
// {
// "topic": {
// "answers": [
// {
// "answer_id": "107366",
// "name": "custom_logo_start",
// "question": "",
// "tooltip": "",
// "inproduct": "10/8/09 12:00",
// "inproduct_target": null
// },
// {
// "answer_id": "107366",
// "name": "custom_logo_end",
// "question": "",
// "tooltip": "",
// "inproduct": "10/8/09 12:00",
// "inproduct_target": null
// },
// ...
// ]
// }
// }
//
// Public for unit testing.
void UnpackLogoSignal(const DictionaryValue& parsed_json);
int cache_update_delay() const { return cache_update_delay_; }
static const char* kCurrentTipPrefName;
static const char* kTipCachePrefName;
// Default server of dynamically loaded NTP HTML elements (promotions, tips):
static const char* kDefaultWebResourceServer;
private:
class WebResourceFetcher;
friend class WebResourceFetcher;
class UnpackerClient;
~WebResourceService();
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 DictionaryValue& parsed_json);
// Notify listeners that the state of a web resource has changed.
void WebResourceStateChange();
// Schedule a notification that a web resource is either going to become
// available or be no longer valid.
void ScheduleNotification(double ms_start_time, double ms_end_time);
// We need to be able to load parsed resource data into preferences file,
// and get proper install directory.
PrefService* prefs_;
// Display and fetch of promo lines depends on data associated with a user's
// profile.
Profile* profile_;
scoped_ptr<WebResourceFetcher> web_resource_fetcher_;
ResourceDispatcherHost* resource_dispatcher_host_;
// Allows the creation of tasks to send a WEB_RESOURCE_STATE_CHANGED
// notification. This allows the WebResourceService to notify the New Tab
// Page immediately when a new web resource should be shown or removed.
ScopedRunnableMethodFactory<WebResourceService> service_factory_;
// 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_;
// Delay between calls to update the web resource cache. This delay may be
// different for different builds of Chrome.
int cache_update_delay_;
// True if a task has been set to update the cache when a new web resource
// becomes available.
bool web_resource_update_scheduled_;
DISALLOW_COPY_AND_ASSIGN(WebResourceService);
};
#endif // CHROME_BROWSER_WEB_RESOURCE_WEB_RESOURCE_SERVICE_H_
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