tdesktop/Telegram/SourceFiles/data/data_cloud_file.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "data/data_cloud_file.h"
#include "data/data_file_origin.h"
#include "data/data_session.h"
#include "storage/cache/storage_cache_database.h"
#include "storage/file_download.h"
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#include "ui/image/image.h"
#include "main/main_session.h"
namespace Data {
CloudFile::~CloudFile() {
// Destroy loader with still alive CloudFile with already zero '.loader'.
// Otherwise in ~FileLoader it tries to clear file.loader and crashes.
base::take(loader);
}
void CloudImageView::set(
not_null<Main::Session*> session,
QImage image) {
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_image.emplace(std::move(image));
session->notifyDownloaderTaskFinished();
}
CloudImage::CloudImage() = default;
CloudImage::CloudImage(
not_null<Main::Session*> session,
const ImageWithLocation &data) {
update(session, data);
}
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Image *CloudImageView::image() {
return _image ? &*_image : nullptr;
}
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void CloudImage::set(
not_null<Main::Session*> session,
const ImageWithLocation &data) {
const auto &was = _file.location.file().data;
const auto &now = data.location.file().data;
if (!data.location.valid()) {
_file.flags |= CloudFile::Flag::Cancelled;
_file.loader = nullptr;
_file.location = ImageLocation();
_file.byteSize = 0;
_file.flags = CloudFile::Flag();
_view = std::weak_ptr<CloudImageView>();
} else if (was != now
&& (!was.is<InMemoryLocation>() || now.is<InMemoryLocation>())) {
_file.location = ImageLocation();
_view = std::weak_ptr<CloudImageView>();
}
UpdateCloudFile(
_file,
data,
session->data().cache(),
kImageCacheTag,
[=](FileOrigin origin) { load(session, origin); },
[=](QImage preloaded) {
if (const auto view = activeView()) {
view->set(session, data.preloaded);
}
});
}
void CloudImage::update(
not_null<Main::Session*> session,
const ImageWithLocation &data) {
UpdateCloudFile(
_file,
data,
session->data().cache(),
kImageCacheTag,
[=](FileOrigin origin) { load(session, origin); },
[=](QImage preloaded) {
if (const auto view = activeView()) {
view->set(session, data.preloaded);
}
});
}
bool CloudImage::empty() const {
return !_file.location.valid();
}
bool CloudImage::loading() const {
return (_file.loader != nullptr);
}
bool CloudImage::failed() const {
return (_file.flags & CloudFile::Flag::Failed);
}
void CloudImage::load(not_null<Main::Session*> session, FileOrigin origin) {
const auto autoLoading = false;
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const auto finalCheck = [=] {
if (const auto active = activeView()) {
return !active->image();
}
return true;
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};
const auto done = [=](QImage result) {
if (const auto active = activeView()) {
active->set(session, std::move(result));
}
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};
LoadCloudFile(
session,
_file,
origin,
LoadFromCloudOrLocal,
autoLoading,
kImageCacheTag,
finalCheck,
done);
}
const ImageLocation &CloudImage::location() const {
return _file.location;
}
int CloudImage::byteSize() const {
return _file.byteSize;
}
std::shared_ptr<CloudImageView> CloudImage::createView() {
if (auto active = activeView()) {
return active;
}
auto view = std::make_shared<CloudImageView>();
_view = view;
return view;
}
std::shared_ptr<CloudImageView> CloudImage::activeView() {
return _view.lock();
}
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bool CloudImage::isCurrentView(
const std::shared_ptr<CloudImageView> &view) const {
if (!view) {
return empty();
}
return !view.owner_before(_view) && !_view.owner_before(view);
}
void UpdateCloudFile(
CloudFile &file,
const ImageWithLocation &data,
Storage::Cache::Database &cache,
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uint8 cacheTag,
Fn<void(FileOrigin)> restartLoader,
Fn<void(QImage)> usePreloaded) {
if (!data.location.valid()) {
return;
}
const auto update = !file.location.valid()
|| (data.location.file().cacheKey()
&& (!file.location.file().cacheKey()
|| (file.location.width() < data.location.width())
|| (file.location.height() < data.location.height())));
if (!update) {
return;
}
auto cacheBytes = !data.bytes.isEmpty()
? data.bytes
: file.location.file().data.is<InMemoryLocation>()
? file.location.file().data.get_unchecked<InMemoryLocation>().bytes
: QByteArray();
if (!cacheBytes.isEmpty()) {
if (const auto cacheKey = data.location.file().cacheKey()) {
cache.putIfEmpty(
cacheKey,
Storage::Cache::Database::TaggedValue(
std::move(cacheBytes),
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cacheTag));
}
}
file.location = data.location;
file.byteSize = data.bytesCount;
if (!data.preloaded.isNull()) {
file.loader = nullptr;
if (usePreloaded) {
usePreloaded(data.preloaded);
}
} else if (file.loader) {
const auto origin = base::take(file.loader)->fileOrigin();
restartLoader(origin);
}
}
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void LoadCloudFile(
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not_null<Main::Session*> session,
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CloudFile &file,
FileOrigin origin,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag,
Fn<bool()> finalCheck,
Fn<void(CloudFile&)> done,
Fn<void(bool)> fail,
Fn<void()> progress) {
if (file.loader) {
if (fromCloud == LoadFromCloudOrLocal) {
file.loader->permitLoadFromCloud();
}
return;
} else if ((file.flags & CloudFile::Flag::Failed)
|| !file.location.valid()
|| (finalCheck && !finalCheck())) {
return;
}
file.flags &= ~CloudFile::Flag::Cancelled;
file.loader = CreateFileLoader(
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session,
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file.location.file(),
origin,
QString(),
file.byteSize,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag);
const auto finish = [done](CloudFile &file) {
if (!file.loader || file.loader->cancelled()) {
file.flags |= CloudFile::Flag::Cancelled;
} else {
done(file);
}
// NB! file.loader may be in ~FileLoader() already.
if (const auto loader = base::take(file.loader)) {
if ((file.flags & CloudFile::Flag::Cancelled)
&& !loader->cancelled()) {
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loader->cancel();
}
}
};
file.loader->updates(
) | rpl::start_with_next_error_done([=] {
if (const auto onstack = progress) {
onstack();
}
}, [=, &file](bool started) {
finish(file);
file.flags |= CloudFile::Flag::Failed;
if (const auto onstack = fail) {
onstack(started);
}
}, [=, &file] {
finish(file);
}, file.loader->lifetime());
file.loader->start();
}
void LoadCloudFile(
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not_null<Main::Session*> session,
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CloudFile &file,
FileOrigin origin,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag,
Fn<bool()> finalCheck,
Fn<void(QImage)> done,
Fn<void(bool)> fail,
Fn<void()> progress) {
const auto callback = [=](CloudFile &file) {
if (auto read = file.loader->imageData(); read.isNull()) {
file.flags |= CloudFile::Flag::Failed;
if (const auto onstack = fail) {
onstack(true);
}
} else if (const auto onstack = done) {
onstack(std::move(read));
}
};
LoadCloudFile(
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session,
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file,
origin,
fromCloud,
autoLoading,
cacheTag,
finalCheck,
callback,
std::move(fail),
std::move(progress));
}
void LoadCloudFile(
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not_null<Main::Session*> session,
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CloudFile &file,
FileOrigin origin,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag,
Fn<bool()> finalCheck,
Fn<void(QByteArray)> done,
Fn<void(bool)> fail,
Fn<void()> progress) {
const auto callback = [=](CloudFile &file) {
if (auto bytes = file.loader->bytes(); bytes.isEmpty()) {
file.flags |= CloudFile::Flag::Failed;
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if (const auto onstack = fail) {
onstack(true);
}
} else if (const auto onstack = done) {
onstack(std::move(bytes));
}
};
LoadCloudFile(
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session,
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file,
origin,
fromCloud,
autoLoading,
cacheTag,
finalCheck,
callback,
std::move(fail),
std::move(progress));
}
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} // namespace Data