Move remaining code to app module

There's still some stuff that could potentially go elsewhere but I think it's enough for now.

src/app/notificationsmanager.h

@@ -0,0 +1,89 @@
+// SPDX-FileCopyrightText: 2020 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QImage>
+#include <QJsonObject>
+#include <QMap>
+#include <QObject>
+#include <QPointer>
+#include <QQmlEngine>
+#include <QString>
+#include <Quotient/csapi/notifications.h>
+#include <Quotient/jobs/basejob.h>
+
+class NeoChatConnection;
+class KNotification;
+class NeoChatRoom;
+
+/**
+ * @class NotificationsManager
+ *
+ * This class is responsible for managing notifications.
+ *
+ * This includes sending native notifications on mobile or desktop if available as
+ * well as managing the push notification rules for the current active account.
+ *
+ * @note Matrix manages push notifications centrally for an account and these are
+ *       stored on the home server. This is to allow a users settings to move between clients.
+ *       See https://spec.matrix.org/v1.3/client-server-api/#push-rules for more
+ *       details.
+ */
+class NotificationsManager : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+
+public:
+    explicit NotificationsManager(QObject *parent = nullptr);
+
+    /**
+     * @brief Display a native notification for an invite.
+     */
+    void postInviteNotification(NeoChatRoom *room);
+
+    /**
+     * @brief Clear an existing invite notification for the given room.
+     *
+     * Nothing happens if the given room doesn't have an invite notification.
+     */
+    void clearInvitationNotification(const QString &roomId);
+
+    /**
+     * @brief Display a native notification for the given push notification.
+     */
+    void postPushNotification(const QByteArray &message);
+
+    /**
+     * @brief Handle the notifications for the given connection.
+     */
+    void handleNotifications(QPointer<NeoChatConnection> connection);
+
+private:
+    QHash<QString, qint64> m_initialTimestamp;
+    QHash<QString, QStringList> m_oldNotifications;
+
+    QStringList m_connActiveJob;
+    void startNotificationJob(QPointer<NeoChatConnection> connection);
+
+    QPixmap createNotificationImage(const QImage &icon, NeoChatRoom *room);
+    bool shouldPostNotification(QPointer<NeoChatConnection> connection, const QJsonValue &notification);
+    void postNotification(NeoChatRoom *room,
+                          const QString &sender,
+                          const QString &text,
+                          const QImage &icon,
+                          const QString &replyEventId,
+                          bool canReply,
+                          qint64 timestamp);
+
+    void doPostInviteNotification(QPointer<NeoChatRoom> room);
+
+    QHash<QString, std::pair<qint64, KNotification *>> m_notifications;
+    QHash<QString, QPointer<KNotification>> m_invitations;
+
+    bool permissionAsked = false;
+
+private Q_SLOTS:
+    void processNotificationJob(QPointer<NeoChatConnection> connection, Quotient::GetNotificationsJob *job, bool initialization);
+};