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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/query_tiles/internal/trending_tile_handler.h"
#include "components/query_tiles/internal/stats.h"
#include "components/query_tiles/internal/tile_config.h"
#include "components/query_tiles/internal/tile_utils.h"
#include "components/query_tiles/switches.h"
namespace query_tiles {
TrendingTileHandler::TrendingTileHandler() = default;
TrendingTileHandler::~TrendingTileHandler() = default;
void TrendingTileHandler::Reset() {
tile_impressions_.clear();
}
std::vector<Tile> TrendingTileHandler::FilterExtraTrendingTiles(
const std::vector<std::unique_ptr<Tile>>& tiles) {
int trending_count = 0;
std::vector<Tile> result;
for (const auto& tile : tiles) {
if (IsTrendingTile(tile->id)) {
if (trending_count >= TileConfig::GetNumTrendingTilesToDisplay())
continue;
++trending_count;
RecordImpression(tile->id);
}
result.emplace_back(*tile);
}
return result;
}
void TrendingTileHandler::OnTileClicked(const std::string& tile_id) {
if (IsTrendingTile(tile_id))
stats::RecordTrendingTileEvent(stats::TrendingTileEvent::kClicked);
}
std::vector<std::string> TrendingTileHandler::GetTrendingTilesToRemove() {
std::vector<std::string> tile_ids;
ImpressionMap::iterator it = tile_impressions_.begin();
while (it != tile_impressions_.end()) {
if (it->second >= TileConfig::GetMaxTrendingTileImpressions()) {
tile_ids.emplace_back(it->first);
it = tile_impressions_.erase(it);
stats::RecordTrendingTileEvent(stats::TrendingTileEvent::kRemoved);
} else {
++it;
}
}
return tile_ids;
}
void TrendingTileHandler::RecordImpression(const std::string& tile_id) {
++tile_impressions_[tile_id];
stats::RecordTrendingTileEvent(stats::TrendingTileEvent::kShown);
}
} // namespace query_tiles
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