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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.
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/dom_ui/tips_handler.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/web_resource/web_resource_service.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/web_resource/web_resource_unpacker.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/gurl.h"
namespace {
// TODO(mrc): l10n
// This title should only appear the very first time Chrome is run with
// web resources enabled; otherwise the cache should be populated.
static const wchar_t* kTipsTitleAtStartup =
L"Tips and recommendations to help you discover interesting websites.";
}
TipsHandler::TipsHandler(DOMUI* dom_ui)
: DOMMessageHandler(dom_ui),
dom_ui_(dom_ui) {
dom_ui->RegisterMessageCallback("getTips",
NewCallback(this, &TipsHandler::HandleGetTips));
tips_cache_ = dom_ui_->GetProfile()->GetPrefs()->
GetDictionary(prefs::kNTPTipsCache);
}
void TipsHandler::HandleGetTips(const Value* content) {
// List containing the tips to be displayed.
ListValue list_value;
// Holds the web resource data found in the preferences cache.
DictionaryValue* wr_dict;
// These values hold the data for each web resource item. As the web
// resource server solidifies, these may change.
std::wstring title;
std::wstring thumb;
std::wstring source;
std::wstring snipp;
std::wstring url;
// This should only be true on the very first Chrome run; otherwise,
// the cache should be populated.
if (tips_cache_ == NULL || tips_cache_->GetSize() < 1) {
title = kTipsTitleAtStartup;
DictionaryValue* tip_dict = new DictionaryValue();
tip_dict->SetString(WebResourceService::kWebResourceTitle, title);
tip_dict->SetString(WebResourceService::kWebResourceURL, L"");
list_value.Append(tip_dict);
} else {
int tip_counter = 0;
while (tips_cache_->GetDictionary(IntToWString(tip_counter++), &wr_dict)) {
DictionaryValue* tip_dict = new DictionaryValue();
if (wr_dict &&
wr_dict->GetSize() > 0 &&
wr_dict->GetString(WebResourceService::kWebResourceTitle, &title) &&
wr_dict->GetString(WebResourceService::kWebResourceURL, &url) &&
IsValidURL(url)) {
tip_dict->SetString(WebResourceService::kWebResourceTitle, title);
tip_dict->SetString(WebResourceService::kWebResourceURL, url);
list_value.Append(tip_dict);
}
}
}
// Send list of web resource items back out to the DOM.
dom_ui_->CallJavascriptFunction(L"tips", list_value);
}
// static
void TipsHandler::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterDictionaryPref(prefs::kNTPTipsCache);
prefs->RegisterStringPref(prefs::kNTPTipsServer,
WebResourceService::kDefaultResourceServer);
}
bool TipsHandler::IsValidURL(const std::wstring& url_string) {
GURL url(WideToUTF8(url_string));
return !url.is_empty() && (url.SchemeIs(chrome::kHttpScheme) ||
url.SchemeIs(chrome::kHttpsScheme));
}
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