https://bugs.kde.org/show_bug.cgi?id=517489
Bug ID: 517489
Summary: ** Expose a `ClearHistory()` DBus method in
`org.kde.NotificationManager`
Classification: Plasma
Product: plasmashell
Version First master
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: Notifications
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
Currently, there is no programmatic way to clear the notification history in
Plasma 6. The `org.freedesktop.Notifications` interface exposed by plasmashell
only provides `CloseNotification(uint id)`, which closes individual active
notifications but does not affect the history stored in memory by
`libnotificationmanager`.
This makes it impossible to automate history cleanup (e.g., via a systemd
timer, a script, or a third-party application) without restarting
`plasmashell`, which is disruptive.
**Suggested solution:**
Add a `ClearHistory()` method to the `org.kde.NotificationManager` DBus
interface, already present at `/org/freedesktop/Notifications`.
The implementation would live in `libnotificationmanager`, specifically:
- `server_p.cpp` — register the new DBus method
- `notificationsmodel.cpp` — implement the actual history clearing logic
Pseudocode of expected behavior:
```
// DBus interface: org.kde.NotificationManager
// Object path: /org/freedesktop/Notifications
method void ClearHistory()
notificationsModel.removeAll(where: isExpired OR isPersistent)
emit HistoryCleared()
```
Expected DBus call from userspace:
```bash
qdbus6 org.kde.plasmashell /org/freedesktop/Notifications \
org.kde.NotificationManager.ClearHistory
```
This would enable simple automation such as a systemd user timer:
```ini
# ~/.config/systemd/user/clear-notifications.service
[Service]
Type=oneshot
ExecStart=qdbus6 org.kde.plasmashell /org/freedesktop/Notifications \
org.kde.NotificationManager.ClearHistory
```
**Optionally**, a variant accepting a max-age argument would be even more
flexible:
```
method void ClearHistory(uint olderThanSeconds)
// removes only notifications older than the given threshold
```
**Steps to reproduce / verify the gap:**
1. Run: `qdbus6 org.kde.plasmashell /org/freedesktop/Notifications`
2. Observe that `org.kde.NotificationManager` only exposes `InvokeAction`,
`RegisterWatcher`, and `UnRegisterWatcher` — no method to clear or expire
history entries.
**Why this matters:**
Users may want to clear notification history periodically for privacy reasons,
to reduce clutter, or as part of automated workflows. The infrastructure is
already in place; this is a small and self-contained addition.
**Environment:**
- Plasma 6
- Arch Linux (fully updated)
- Wayland session
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