pk: Tell our users when they're running an unsupported version of their Distro

BUG: 449259

discover/qml/DiscoverPage.qml

@@ -14,6 +14,11 @@ Kirigami.ScrollablePage
     Kirigami.Theme.colorSet: Kirigami.Theme.View
     Kirigami.Theme.inherit: false
 
+    header:  Kirigami.InlineMessage {
+        id: headerInlineMessage
+        visible: false
+    }
+
     readonly property var s1: Shortcut {
         sequence: StandardKey.MoveToNextPage
         enabled: root.isCurrentPage

discover/qml/DiscoverWindow.qml

@@ -160,6 +160,14 @@ Kirigami.ApplicationWindow
             showPassiveNotification(message)
             console.log("message:", message)
         }
+        function onInlineMessage (type, icon, message) {
+            leftPage.header.type = type
+            leftPage.header.icon.name = icon
+            leftPage.header.text = message
+            leftPage.header.visible = true
+
+            console.log("inline message:", message)
+        }
     }
 
     footer: Loader {

libdiscover/backends/PackageKitBackend/PackageKitBackend.cpp

@@ -12,6 +12,8 @@
 #include "PKTransaction.h"
 #include "PackageKitSourcesBackend.h"
 #include "PackageKitUpdater.h"
+#include <AppStreamQt/release.h>
+#include <AppStreamQt/utils.h>
 #include <appstream/AppStreamIntegration.h>
 #include <appstream/AppStreamUtils.h>
 #include <appstream/OdrsReviewsBackend.h>
@@ -225,6 +227,23 @@ void PackageKitBackend::reloadPackageList()
             Q_EMIT loadedAppStream();
         }
         acquireFetching(false);
+
+        const QList<AppStream::Component> distroComponents = m_appdata->componentsById(AppStream::Utils::currentDistroComponentId());
+        for (const AppStream::Component &dc : distroComponents) {
+            const auto releases = dc.releases();
+            for (auto r : releases) {
+                if (AppStream::Utils::vercmpSimple(r.version(), AppStreamIntegration::global()->osRelease()->version()) == 0) {
+                    if (r.timestampEol() < QDateTime::currentDateTime()) {
+                        const QString releaseDate = QLocale().toString(r.timestampEol());
+                        Q_EMIT inlineMessage(InlineMessageType::Warning,
+                                             QStringLiteral("dialog-warning"),
+                                             i18nc("%1 is the date as formatted by the locale",
+                                                   "Your operating system ended support on %1. Consider upgrading to a supported version.",
+                                                   releaseDate));
+                    }
+                }
+            }
+        }
     });
     fw->setFuture(QtConcurrent::run(&m_threadPool, &loadAppStream, m_appdata.get()));
 }

libdiscover/resources/AbstractResourcesBackend.h

@@ -58,6 +58,14 @@ private:
     QVariantList m_actions;
 };
 
+// Keep in sync with Kirigami's enums.h
+enum class InlineMessageType {
+    Information = 0,
+    Positive,
+    Warning,
+    Error,
+};
+
 /**
  * \class AbstractResourcesBackend  AbstractResourcesBackend.h "AbstractResourcesBackend.h"
  *
@@ -248,6 +256,7 @@ Q_SIGNALS:
     void resourceRemoved(AbstractResource *resource);
 
     void passiveMessage(const QString &message);
+    void inlineMessage(InlineMessageType type, const QString &iconName, const QString &message);
     void fetchingUpdatesProgressChanged();
 
 private:

libdiscover/resources/ResourcesModel.cpp

@@ -148,6 +148,7 @@ void ResourcesModel::addResourcesBackend(AbstractResourcesBackend *backend)
     });
     connect(backend, &AbstractResourcesBackend::resourceRemoved, this, &ResourcesModel::resourceRemoved);
     connect(backend, &AbstractResourcesBackend::passiveMessage, this, &ResourcesModel::passiveMessage);
+    connect(backend, &AbstractResourcesBackend::inlineMessage, this, &ResourcesModel::inlineMessage);
     connect(backend->backendUpdater(), &AbstractBackendUpdater::progressingChanged, this, &ResourcesModel::slotFetching);
     if (backend->reviewsBackend()) {
         connect(backend->reviewsBackend(), &AbstractReviewsBackend::error, this, &ResourcesModel::passiveMessage, Qt::UniqueConnection);

libdiscover/resources/ResourcesModel.h

@@ -134,6 +134,7 @@ Q_SIGNALS:
     void passiveMessage(const QString &message);
     void currentApplicationBackendChanged(AbstractResourcesBackend *currentApplicationBackend);
     void fetchingUpdatesProgressChanged(int fetchingUpdatesProgress);
+    void inlineMessage(InlineMessageType type, const QString &iconName, const QString &message);
 
 private Q_SLOTS:
     void callerFetchingChanged();