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// Copyright 2016 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 "components/ntp_tiles/metrics.h"
#include <string>
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/sparse_histogram.h"
#include "base/strings/stringprintf.h"
#include "components/rappor/public/rappor_utils.h"
namespace ntp_tiles {
namespace metrics {
namespace {
// Maximum number of tiles to record in histograms.
const int kMaxNumTiles = 12;
// Identifiers for the various tile sources.
const char kHistogramClientName[] = "client";
const char kHistogramServerName[] = "server";
const char kHistogramPopularName[] = "popular";
const char kHistogramWhitelistName[] = "whitelist";
// Log an event for a given |histogram| at a given element |position|. This
// routine exists because regular histogram macros are cached thus can't be used
// if the name of the histogram will change at a given call site.
void LogHistogramEvent(const std::string& histogram,
int position,
int num_sites) {
base::HistogramBase* counter = base::LinearHistogram::FactoryGet(
histogram, 1, num_sites, num_sites + 1,
base::Histogram::kUmaTargetedHistogramFlag);
if (counter)
counter->Add(position);
}
std::string GetSourceHistogramName(NTPTileSource source) {
switch (source) {
case NTPTileSource::TOP_SITES:
return kHistogramClientName;
case NTPTileSource::POPULAR:
return kHistogramPopularName;
case NTPTileSource::WHITELIST:
return kHistogramWhitelistName;
case NTPTileSource::SUGGESTIONS_SERVICE:
return kHistogramServerName;
}
NOTREACHED();
return std::string();
}
} // namespace
void RecordPageImpression(const std::vector<TileImpression>& tiles,
rappor::RapporService* rappor_service) {
UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.NumberOfTiles", tiles.size());
int counts_per_type[NUM_RECORDED_TILE_TYPES] = {0};
bool have_tile_types = false;
for (int index = 0; index < static_cast<int>(tiles.size()); index++) {
NTPTileSource source = tiles[index].source;
MostVisitedTileType tile_type = tiles[index].type;
const GURL& url = tiles[index].url;
UMA_HISTOGRAM_ENUMERATION("NewTabPage.SuggestionsImpression", index,
kMaxNumTiles);
std::string source_name = GetSourceHistogramName(source);
std::string impression_histogram = base::StringPrintf(
"NewTabPage.SuggestionsImpression.%s", source_name.c_str());
LogHistogramEvent(impression_histogram, index, kMaxNumTiles);
if (tile_type >= NUM_RECORDED_TILE_TYPES) {
continue;
}
have_tile_types = true;
++counts_per_type[tile_type];
UMA_HISTOGRAM_ENUMERATION("NewTabPage.TileType", tile_type,
NUM_RECORDED_TILE_TYPES);
std::string tile_type_histogram =
base::StringPrintf("NewTabPage.TileType.%s", source_name.c_str());
LogHistogramEvent(tile_type_histogram, tile_type, NUM_RECORDED_TILE_TYPES);
switch (tile_type) {
case NONE:
break;
case ICON_COLOR:
rappor::SampleDomainAndRegistryFromGURL(
rappor_service, "NTP.SuggestionsImpressions.IconsColor", url);
break;
case ICON_DEFAULT:
rappor::SampleDomainAndRegistryFromGURL(
rappor_service, "NTP.SuggestionsImpressions.IconsGray", url);
break;
case ICON_REAL:
rappor::SampleDomainAndRegistryFromGURL(
rappor_service, "NTP.SuggestionsImpressions.IconsReal", url);
break;
case NUM_RECORDED_TILE_TYPES: // Fall through.
case THUMBNAIL: // Fall through.
case UNKNOWN_TILE_TYPE:
NOTREACHED();
}
}
if (have_tile_types) {
UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsReal",
counts_per_type[ICON_REAL]);
UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsColor",
counts_per_type[ICON_COLOR]);
UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsGray",
counts_per_type[ICON_DEFAULT]);
}
}
void RecordTileClick(int index,
NTPTileSource source,
MostVisitedTileType tile_type) {
UMA_HISTOGRAM_ENUMERATION("NewTabPage.MostVisited", index, kMaxNumTiles);
std::string histogram = base::StringPrintf(
"NewTabPage.MostVisited.%s", GetSourceHistogramName(source).c_str());
LogHistogramEvent(histogram, index, kMaxNumTiles);
if (tile_type < NUM_RECORDED_TILE_TYPES) {
UMA_HISTOGRAM_ENUMERATION("NewTabPage.TileTypeClicked", tile_type,
NUM_RECORDED_TILE_TYPES);
std::string histogram =
base::StringPrintf("NewTabPage.TileTypeClicked.%s",
GetSourceHistogramName(source).c_str());
LogHistogramEvent(histogram, tile_type, NUM_RECORDED_TILE_TYPES);
}
}
} // namespace metrics
} // namespace ntp_tiles
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