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// 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.
#include "chrome/browser/ui/webui/ntp/suggestions_page_handler.h"
#include <math.h>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/md5.h"
#include "base/metrics/histogram.h"
#include "base/strings/string16.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread.h"
#include "base/values.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/history/top_sites.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/webui/favicon_source.h"
#include "chrome/browser/ui/webui/ntp/ntp_stats.h"
#include "chrome/browser/ui/webui/ntp/suggestions_combiner.h"
#include "chrome/browser/ui/webui/ntp/suggestions_source_top_sites.h"
#include "chrome/browser/ui/webui/ntp/thumbnail_source.h"
#include "chrome/common/url_constants.h"
#include "components/history/core/browser/page_usage_data.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/url_data_source.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "ui/base/page_transition_types.h"
#include "url/gurl.h"
using base::UserMetricsAction;
SuggestionsHandler::SuggestionsHandler()
: got_first_suggestions_request_(false),
suggestions_viewed_(false),
user_action_logged_(false) {
}
SuggestionsHandler::~SuggestionsHandler() {
if (!user_action_logged_ && suggestions_viewed_) {
const GURL ntp_url = GURL(chrome::kChromeUINewTabURL);
int action_id = NTP_FOLLOW_ACTION_OTHER;
content::NavigationEntry* entry =
web_ui()->GetWebContents()->GetController().GetLastCommittedEntry();
if (entry && (entry->GetURL() != ntp_url)) {
action_id =
ui::PageTransitionStripQualifier(entry->GetTransitionType());
}
UMA_HISTOGRAM_ENUMERATION("NewTabPage.SuggestedSitesAction", action_id,
NUM_NTP_FOLLOW_ACTIONS);
}
}
void SuggestionsHandler::RegisterMessages() {
Profile* profile = Profile::FromWebUI(web_ui());
// Set up our sources for thumbnail and favicon data.
content::URLDataSource::Add(profile, new ThumbnailSource(profile, false));
content::URLDataSource::Add(
profile, new FaviconSource(profile, FaviconSource::FAVICON));
// TODO(georgey) change the source of the web-sites to provide our data.
// Initial commit uses top sites as a data source.
history::TopSites* top_sites = profile->GetTopSites();
if (top_sites) {
// TopSites updates itself after a delay. This is especially noticable when
// your profile is empty. Ask TopSites to update itself when we're about to
// show the new tab page.
top_sites->SyncWithHistory();
// Register for notification when TopSites changes so that we can update
// ourself.
registrar_.Add(this, chrome::NOTIFICATION_TOP_SITES_CHANGED,
content::Source<history::TopSites>(top_sites));
}
// Setup the suggestions sources.
SuggestionsCombiner* combiner = new SuggestionsCombiner(this, profile);
combiner->AddSource(new SuggestionsSourceTopSites());
suggestions_combiner_.reset(combiner);
// We pre-emptively make a fetch for suggestions so we have the results
// sooner.
suggestions_combiner_->FetchItems(profile);
web_ui()->RegisterMessageCallback("getSuggestions",
base::Bind(&SuggestionsHandler::HandleGetSuggestions,
base::Unretained(this)));
// Register ourselves for any suggestions item blacklisting.
web_ui()->RegisterMessageCallback("blacklistURLFromSuggestions",
base::Bind(&SuggestionsHandler::HandleBlacklistURL,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("removeURLsFromSuggestionsBlacklist",
base::Bind(&SuggestionsHandler::HandleRemoveURLsFromBlacklist,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("clearSuggestionsURLsBlacklist",
base::Bind(&SuggestionsHandler::HandleClearBlacklist,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("suggestedSitesAction",
base::Bind(&SuggestionsHandler::HandleSuggestedSitesAction,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("suggestedSitesSelected",
base::Bind(&SuggestionsHandler::HandleSuggestedSitesSelected,
base::Unretained(this)));
}
void SuggestionsHandler::HandleGetSuggestions(const base::ListValue* args) {
if (!got_first_suggestions_request_) {
// If it's the first request we get, return the prefetched data.
SendPagesValue();
got_first_suggestions_request_ = true;
} else {
suggestions_combiner_->FetchItems(Profile::FromWebUI(web_ui()));
}
}
void SuggestionsHandler::OnSuggestionsReady() {
// If we got the results as a result of a suggestions request initiated by the
// JavaScript then we send back the page values.
if (got_first_suggestions_request_)
SendPagesValue();
}
void SuggestionsHandler::SendPagesValue() {
if (suggestions_combiner_->GetPageValues()) {
// TODO(georgey) add actual blacklist.
bool has_blacklisted_urls = false;
base::FundamentalValue has_blacklisted_urls_value(has_blacklisted_urls);
web_ui()->CallJavascriptFunction("ntp.setSuggestionsPages",
*suggestions_combiner_->GetPageValues(),
has_blacklisted_urls_value);
}
}
void SuggestionsHandler::HandleBlacklistURL(const base::ListValue* args) {
std::string url = base::UTF16ToUTF8(ExtractStringValue(args));
BlacklistURL(GURL(url));
}
void SuggestionsHandler::HandleRemoveURLsFromBlacklist(
const base::ListValue* args) {
DCHECK_GT(args->GetSize(), 0U);
// TODO(georgey) remove URLs from blacklist.
}
void SuggestionsHandler::HandleClearBlacklist(const base::ListValue* args) {
// TODO(georgey) clear blacklist.
}
void SuggestionsHandler::HandleSuggestedSitesAction(
const base::ListValue* args) {
DCHECK(args);
double action_id;
if (!args->GetDouble(0, &action_id))
NOTREACHED();
UMA_HISTOGRAM_ENUMERATION("NewTabPage.SuggestedSitesAction",
static_cast<int>(action_id),
NUM_NTP_FOLLOW_ACTIONS);
suggestions_viewed_ = true;
user_action_logged_ = true;
}
void SuggestionsHandler::HandleSuggestedSitesSelected(
const base::ListValue* args) {
suggestions_viewed_ = true;
}
void SuggestionsHandler::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK_EQ(type, chrome::NOTIFICATION_TOP_SITES_CHANGED);
// Suggestions urls changed, query again.
suggestions_combiner_->FetchItems(Profile::FromWebUI(web_ui()));
}
void SuggestionsHandler::BlacklistURL(const GURL& url) {
// TODO(georgey) blacklist an URL.
}
std::string SuggestionsHandler::GetDictionaryKeyForURL(const std::string& url) {
return base::MD5String(url);
}
// static
void SuggestionsHandler::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
// TODO(georgey) add user preferences (such as own blacklist) as needed.
}
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