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diff --git a/src/module/integrated/version_checking_module/VersionCheckTask.cpp b/src/module/integrated/version_checking_module/VersionCheckTask.cpp
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+++ b/src/module/integrated/version_checking_module/VersionCheckTask.cpp
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+/**
+ * Copyright (C) 2021 Saturneric <[email protected]>
+ *
+ * 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 <[email protected]> starting on May 12, 2021.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
+
+#include "VersionCheckTask.h"
+
+#include <QMetaType>
+#include <QtNetwork>
+
+#include "GpgFrontendBuildInfo.h"
+
+namespace GpgFrontend::Module::Integrated::VersionCheckingModule {
+
+VersionCheckTask::VersionCheckTask()
+    : Task("version_check_task"),
+      network_manager_(new QNetworkAccessManager(this)),
+      current_version_(QString("v") + VERSION_MAJOR + "." + VERSION_MINOR +
+                       "." + VERSION_PATCH) {
+  HoldOnLifeCycle(true);
+  qRegisterMetaType<SoftwareVersion>("SoftwareVersion");
+  version_.current_version = current_version_;
+}
+
+auto VersionCheckTask::Run() -> int {
+  MODULE_LOG_DEBUG("current project version: {}", current_version_);
+  QString latest_version_url =
+      "https://api.github.com/repos/saturneric/gpgfrontend/releases/latest";
+
+  QNetworkRequest latest_request;
+  latest_request.setUrl(QUrl(latest_version_url));
+  latest_reply_ = network_manager_->get(latest_request);
+  connect(latest_reply_, &QNetworkReply::finished, this,
+          &VersionCheckTask::slot_parse_latest_version_info);
+  return 0;
+}
+
+void VersionCheckTask::slot_parse_latest_version_info() {
+  version_.current_version = current_version_;
+
+  if (latest_reply_ == nullptr ||
+      latest_reply_->error() != QNetworkReply::NoError) {
+    MODULE_LOG_ERROR("latest version request error");
+    version_.latest_version = current_version_;
+  } else {
+    latest_reply_bytes_ = latest_reply_->readAll();
+    auto latest_reply_json = QJsonDocument::fromJson(latest_reply_bytes_);
+
+    QString latest_version = latest_reply_json["tag_name"].toString();
+    MODULE_LOG_INFO("latest version from Github: {}", latest_version);
+
+    QRegularExpression re(R"(^[vV](\d+\.)?(\d+\.)?(\*|\d+))");
+    auto version_match = re.match(latest_version);
+    if (version_match.hasMatch()) {
+      latest_version = version_match.captured(0);
+      MODULE_LOG_DEBUG("latest version matched: {}", latest_version);
+    } else {
+      latest_version = current_version_;
+      MODULE_LOG_WARN("latest version unknown");
+    }
+
+    bool prerelease = latest_reply_json["prerelease"].toBool();
+    bool draft = latest_reply_json["draft"].toBool();
+    auto publish_date = latest_reply_json["published_at"].toString();
+    auto release_note = latest_reply_json["body"].toString();
+    version_.latest_version = latest_version;
+    version_.latest_prerelease_version_from_remote = prerelease;
+    version_.latest_draft_from_remote = draft;
+    version_.publish_date = publish_date;
+    version_.release_note = release_note;
+  }
+
+  if (latest_reply_ != nullptr) {
+    latest_reply_->deleteLater();
+  }
+
+  try {
+    QString current_version_url =
+        "https://api.github.com/repos/saturneric/gpgfrontend/releases/tags/" +
+        current_version_;
+    MODULE_LOG_DEBUG("current version info query url: {}", current_version_url);
+
+    QNetworkRequest current_request;
+    current_request.setUrl(QUrl(current_version_url));
+    current_reply_ = network_manager_->get(current_request);
+
+    connect(current_reply_, &QNetworkReply::finished, this,
+            &VersionCheckTask::slot_parse_current_version_info);
+  } catch (...) {
+    MODULE_LOG_ERROR("current version request create error");
+    emit SignalTaskShouldEnd(-1);
+  }
+}
+
+void VersionCheckTask::slot_parse_current_version_info() {
+  if (current_reply_ == nullptr ||
+      current_reply_->error() != QNetworkReply::NoError) {
+    if (current_reply_ != nullptr) {
+      MODULE_LOG_ERROR("current version request network error: {}",
+                       current_reply_->errorString().toStdString());
+    } else {
+      MODULE_LOG_ERROR(
+          "current version request network error, null reply object");
+    }
+
+    version_.current_version_publish_in_remote = false;
+
+    // loading done
+    version_.loading_done = true;
+  } else {
+    version_.current_version_publish_in_remote = true;
+    current_reply_bytes_ = current_reply_->readAll();
+    auto current_reply_json = QJsonDocument::fromJson(current_reply_bytes_);
+
+    if (current_reply_json.isObject()) {
+      bool current_prerelease = current_reply_json["prerelease"].toBool();
+      bool current_draft = current_reply_json["draft"].toBool();
+      version_.latest_prerelease_version_from_remote = current_prerelease;
+      version_.latest_draft_from_remote = current_draft;
+      // loading done
+      version_.loading_done = true;
+    } else {
+      MODULE_LOG_WARN("cannot parse data got from github");
+    }
+  }
+
+  MODULE_LOG_DEBUG("current version parse done: {}",
+                   version_.current_version_publish_in_remote);
+
+  if (current_reply_ != nullptr) current_reply_->deleteLater();
+  emit SignalUpgradeVersion(version_);
+  emit SignalTaskShouldEnd(0);
+}
+
+}  // namespace GpgFrontend::Module::Integrated::VersionCheckingModule