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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/ambient/model/ambient_backend_model.h"
#include <algorithm>
#include <random>
#include <utility>
#include <vector>
#include "ash/ambient/metrics/ambient_metrics.h"
#include "ash/ambient/model/ambient_backend_model_observer.h"
#include "ash/ambient/model/ambient_photo_config.h"
#include "ash/public/cpp/ambient/ambient_ui_model.h"
#include "ash/webui/personalization_app/mojom/personalization_app.mojom-shared.h"
#include "base/check.h"
#include "base/containers/flat_map.h"
#include "base/logging.h"
#include "base/time/time.h"
namespace ash {
namespace {
// Note this does not start until the minimum number of topics required in the
// AmbientPhotoConfig is reached.
constexpr base::TimeDelta kImagesReadyTimeout = base::Seconds(10);
} // namespace
// PhotoWithDetails------------------------------------------------------------
PhotoWithDetails::PhotoWithDetails() = default;
PhotoWithDetails::PhotoWithDetails(const PhotoWithDetails&) = default;
PhotoWithDetails& PhotoWithDetails::operator=(const PhotoWithDetails&) =
default;
PhotoWithDetails::PhotoWithDetails(PhotoWithDetails&&) = default;
PhotoWithDetails& PhotoWithDetails::operator=(PhotoWithDetails&&) = default;
PhotoWithDetails::~PhotoWithDetails() = default;
void PhotoWithDetails::Clear() {
photo = gfx::ImageSkia();
details = std::string();
related_photo = gfx::ImageSkia();
related_details = std::string();
is_portrait = false;
}
bool PhotoWithDetails::IsNull() const {
return photo.isNull();
}
// AmbientBackendModel---------------------------------------------------------
AmbientBackendModel::AmbientBackendModel(AmbientPhotoConfig photo_config) {
SetPhotoConfig(std::move(photo_config));
}
AmbientBackendModel::~AmbientBackendModel() = default;
void AmbientBackendModel::AddObserver(AmbientBackendModelObserver* observer) {
observers_.AddObserver(observer);
}
void AmbientBackendModel::RemoveObserver(
AmbientBackendModelObserver* observer) {
observers_.RemoveObserver(observer);
}
bool AmbientBackendModel::ImagesReady() const {
DCHECK_LE(all_decoded_topics_.size(),
photo_config_.GetNumDecodedTopicsToBuffer());
return all_decoded_topics_.size() ==
photo_config_.GetNumDecodedTopicsToBuffer() ||
images_ready_timed_out_;
}
void AmbientBackendModel::OnImagesReadyTimeoutFired() {
if (ImagesReady())
return;
DCHECK_GE(all_decoded_topics_.size(),
photo_config_.min_total_topics_required);
// TODO(esum): Add metrics for how often this case happens.
LOG(WARNING) << "Timed out trying to prepare "
<< photo_config_.GetNumDecodedTopicsToBuffer()
<< " topics. Starting UI with " << all_decoded_topics_.size();
images_ready_timed_out_ = true;
NotifyImagesReady();
}
void AmbientBackendModel::AddNextImage(
const PhotoWithDetails& photo_with_details) {
DCHECK(!photo_with_details.IsNull());
DCHECK(!photo_config_.IsEmpty())
<< "Photos should not be getting added to the model";
ResetImageFailures();
bool old_images_ready = ImagesReady();
all_decoded_topics_.push_back(photo_with_details);
while (all_decoded_topics_.size() >
photo_config_.GetNumDecodedTopicsToBuffer()) {
DCHECK(!all_decoded_topics_.empty());
all_decoded_topics_.pop_front();
}
NotifyImageAdded();
// Observers expect |OnImagesReady| after |OnImageAdded|.
bool new_images_ready = ImagesReady();
if (!old_images_ready && new_images_ready) {
NotifyImagesReady();
if (photo_with_details.topic_type == ::ambient::TopicType::kPersonal) {
ambient::RecordAmbientModeTopicSource(
personalization_app::mojom::TopicSource::kGooglePhotos);
} else {
ambient::RecordAmbientModeTopicSource(
personalization_app::mojom::TopicSource::kArtGallery);
}
} else if (!new_images_ready &&
all_decoded_topics_.size() >=
photo_config_.min_total_topics_required &&
!images_ready_timeout_timer_.IsRunning()) {
images_ready_timeout_timer_.Start(
FROM_HERE, kImagesReadyTimeout, this,
&AmbientBackendModel::OnImagesReadyTimeoutFired);
}
}
bool AmbientBackendModel::IsHashDuplicate(const std::string& hash) const {
// Make sure that a photo does not appear twice in a row.
return all_decoded_topics_.empty() ? false
: all_decoded_topics_.back().hash == hash;
}
void AmbientBackendModel::AddImageFailure() {
failures_++;
if (ImageLoadingFailed()) {
DVLOG(3) << "image loading failed";
for (auto& observer : observers_)
observer.OnImagesFailed();
}
}
void AmbientBackendModel::ResetImageFailures() {
failures_ = 0;
}
bool AmbientBackendModel::ImageLoadingFailed() {
return !ImagesReady() && failures_ >= kMaxConsecutiveReadPhotoFailures;
}
base::TimeDelta AmbientBackendModel::GetPhotoRefreshInterval() const {
if (!ImagesReady())
return base::TimeDelta();
return AmbientUiModel::Get()->photo_refresh_interval();
}
void AmbientBackendModel::SetPhotoConfig(AmbientPhotoConfig photo_config) {
photo_config_ = std::move(photo_config);
DCHECK_LE(photo_config_.min_total_topics_required,
photo_config_.GetNumDecodedTopicsToBuffer());
Clear();
}
void AmbientBackendModel::Clear() {
all_decoded_topics_.clear();
images_ready_timeout_timer_.Stop();
images_ready_timed_out_ = false;
}
void AmbientBackendModel::GetCurrentAndNextImages(
PhotoWithDetails* current_image_out,
PhotoWithDetails* next_image_out) const {
auto fill_image_out = [&](size_t idx, PhotoWithDetails* image_out) {
if (!image_out)
return;
image_out->Clear();
if (idx < all_decoded_topics_.size()) {
*image_out = all_decoded_topics_[idx];
}
};
fill_image_out(/*idx=*/0, current_image_out);
fill_image_out(/*idx=*/1, next_image_out);
}
void AmbientBackendModel::NotifyImageAdded() {
for (auto& observer : observers_)
observer.OnImageAdded();
}
void AmbientBackendModel::NotifyImagesReady() {
for (auto& observer : observers_)
observer.OnImagesReady();
}
} // namespace ash
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