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/**
* Copyright (C) 2021-2024 Saturneric <eric@bktus.com>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <eric@bktus.com> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include "UpdateChecker.h"
#include <GFSDKApp.h>
#include <QJsonDocument>
#include <QJsonObject>
#include <QPointer>
#include "ReleaseCheck.h"
namespace {
constexpr int kStorageSchema = 2;
} // namespace
UpdateChecker::UpdateChecker(Build build, Fetcher fetch, Store store,
Clock clock, QObject* parent)
: QObject(parent),
build_(std::move(build)),
fetch_(std::move(fetch)),
store_(std::move(store)),
clock_(clock ? std::move(clock)
: [] { return QDateTime::currentDateTime(); }) {
if (store_.load) state_ = FromStorage(store_.load(), build_);
}
auto UpdateChecker::State() const -> const UpdateSnapshot& { return state_; }
auto UpdateChecker::IsFresh() const -> bool {
const auto& good = state_.last_good;
return good && IsAuthoritative(*good) &&
good->SameBuild(build_.version, build_.commit) &&
good->checked_at.secsTo(clock_()) < kFreshSeconds;
}
void UpdateChecker::Acknowledge() {
if (AttentionFor(state_) == UpdateAttention::kNone) return;
state_.last_seen_update_version = state_.last_good->list.latest.version;
if (store_.save) store_.save(ToStorage(state_));
emit Changed();
}
void UpdateChecker::Start(CheckMode mode) {
if (state_.checking) return;
if (mode == CheckMode::kIfStale && IsFresh()) return;
fresh_ = SoftwareVersion{};
fresh_.current_version = build_.version;
fresh_.local_commit_hash = build_.commit;
const bool ask_commit = !build_.commit.trimmed().isEmpty();
// Counted before anything is sent: a fetcher may answer synchronously.
pending_ = ask_commit ? 3 : 2;
state_.checking = true;
emit Changed();
const QString base = QString::fromLatin1(kRepoApi);
// Replies can outlive the checker: the module deletes it on deactivation.
QPointer<UpdateChecker> self(this);
// The list, not /releases/latest: with parallel stable and mainline tracks
// the newest release in the running build's own series is wanted, which a
// single global "latest" cannot express.
fetch_(QUrl(base + "/releases?per_page=100"), [self](int status,
const QByteArray& body) {
if (self.isNull()) return;
self->fresh_.list = ParseReleaseList(status, body, self->build_.version);
self->finish();
});
fetch_(QUrl(base + "/releases/tags/" + build_.version),
[self](int status, const QByteArray& body) {
if (self.isNull()) return;
self->fresh_.tag_fact = ParseTagLookup(status, body);
self->finish();
});
if (ask_commit) {
fetch_(QUrl(base + "/commits/" + build_.commit.trimmed()),
[self](int status, const QByteArray& body) {
if (self.isNull()) return;
self->fresh_.commit_fact =
ParseCommitLookup(status, body, self->build_.commit);
self->finish();
});
}
}
void UpdateChecker::finish() {
if (--pending_ > 0) return;
const auto now = clock_();
fresh_.checked_at = now;
fresh_.complete = IsComplete(fresh_);
state_.checking = false;
state_.last_attempt = now;
state_.last_attempt_failed = !IsUsable(fresh_);
state_.last_good = Merge(state_.last_good, fresh_);
if (store_.save) store_.save(ToStorage(state_));
emit Changed();
}
auto UpdateChecker::ToStorage(const UpdateSnapshot& s) -> QByteArray {
QJsonObject obj;
obj["schema"] = kStorageSchema;
if (s.last_good) obj["last_good"] = s.last_good->ToJson();
if (s.last_attempt.isValid()) {
obj["last_attempt"] = s.last_attempt.toSecsSinceEpoch();
}
obj["last_attempt_failed"] = s.last_attempt_failed;
if (!s.last_seen_update_version.isEmpty()) {
obj["last_seen_update_version"] = s.last_seen_update_version;
}
return QJsonDocument(obj).toJson(QJsonDocument::Compact);
}
auto UpdateChecker::FromStorage(const QByteArray& data, const Build& build)
-> UpdateSnapshot {
UpdateSnapshot s;
const auto doc = QJsonDocument::fromJson(data);
if (!doc.isObject()) return s;
const auto obj = doc.object();
if (obj.value("schema").toInt() != kStorageSchema) return s;
// Which update the user has seen is not a fact about this build: an
// upgrade, or a rebuild, must not advertise it again.
s.last_seen_update_version = obj.value("last_seen_update_version").toString();
auto good = SoftwareVersion::FromJson(obj.value("last_good").toObject());
// What was learned about another build says nothing about this one, and
// neither does how asking about it went.
if (!good || !good->SameBuild(build.version, build.commit)) return s;
s.last_good = std::move(good);
if (obj.value("last_attempt").isDouble()) {
s.last_attempt =
QDateTime::fromSecsSinceEpoch(obj.value("last_attempt").toInteger());
}
s.last_attempt_failed = obj.value("last_attempt_failed").toBool();
return s;
}
auto AttentionFor(const UpdateSnapshot& s) -> UpdateAttention {
if (!s.last_good || Decide(*s.last_good) != Verdict::kUpdateAvailable) {
return UpdateAttention::kNone;
}
const auto& latest = s.last_good->list.latest.version;
const auto& seen = s.last_seen_update_version;
if (!seen.isEmpty() &&
GFCompareSoftwareVersion(latest.toUtf8().constData(),
seen.toUtf8().constData()) <= 0) {
return UpdateAttention::kNone;
}
return UpdateAttention::kUpdateAvailable;
}
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