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// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program 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.
package notify
import (
"log"
"os"
"path/filepath"
"sync"
"time"
"github.com/godbus/dbus/v5"
)
// Name is the well-known bus name the daemon owns.
const Name = "org.freedesktop.Notifications"
const (
objPath = "/org/freedesktop/Notifications"
iface = "org.freedesktop.Notifications"
ctrlPath = "/xyz/danix/Notifyd"
ctrlIface = "xyz.danix.Notifyd"
)
// Service is the org.freedesktop.Notifications object.
type Service struct {
conn *dbus.Conn
store *Store
dir string
mu sync.Mutex
timers map[uint32]*time.Timer
}
func NewService(conn *dbus.Conn, dir string) *Service {
s := &Service{conn: conn, dir: dir, timers: map[uint32]*time.Timer{}}
s.store = NewStore(s.emitClosed, func(live, history []Popup) {
if err := Publish(s.dir, live, history); err != nil {
log.Printf("notifyd: publish: %v", err)
}
}, s.removeImage)
return s
}
// removeImage unlinks only what the daemon wrote, so a client's own image-path
// is never touched. A cleaned path must sit directly inside the image
// directory, which also refuses a `..` traversal to a sibling daemon file.
func (s *Service) removeImage(path string) {
if path == "" {
return
}
if filepath.Dir(filepath.Clean(path)) != ImagesDir(s.dir) {
return
}
os.Remove(path)
}
// Start exports the interfaces and empties the state. Nothing from a previous
// run is resurrected.
func (s *Service) Start() error {
if err := s.conn.Export(s, dbus.ObjectPath(objPath), iface); err != nil {
return err
}
if err := s.conn.Export(&control{s}, dbus.ObjectPath(ctrlPath), ctrlIface); err != nil {
return err
}
if err := os.RemoveAll(ImagesDir(s.dir)); err != nil {
log.Printf("notifyd: clear images: %v", err)
}
s.store.Reset()
return nil
}
func (s *Service) emitClosed(id, reason uint32) {
s.conn.Emit(dbus.ObjectPath(objPath), iface+".NotificationClosed", id, reason)
}
// GetCapabilities tells clients what the daemon understands. actions and
// body-markup are load-bearing: mail-notify sends actions and escapes its body
// because the running dunst advertises markup. body-images says the daemon
// decodes image-data and image-path, not just a static app icon.
func (s *Service) GetCapabilities() ([]string, *dbus.Error) {
return []string{"actions", "body-markup", "body-images", "icon-static", "persistence"}, nil
}
func (s *Service) GetServerInformation() (string, string, string, string, *dbus.Error) {
return "danix", "danix", "0.1", "1.2", nil
}
// Notify is the spec's entry point. The id is returned to the client; a
// replace reuses the id of what it replaced.
func (s *Service) Notify(appName string, replacesID uint32, appIcon, summary, body string, actions []string, hints map[string]dbus.Variant, expireTimeout int32) (uint32, *dbus.Error) {
u := UrgencyFromHints(hints)
tag := StackTagFromHints(hints)
now := time.Now().UnixMilli()
ms := EffectiveTimeoutMS(expireTimeout, u)
// Spec priority is image-data > image-path > the deprecated icon_data. A
// raw blob cannot be written until Add has assigned the id the filename is
// derived from, so any raw tier is held in pendingImage.
var pendingImage []byte
n := &Popup{
App: appName,
Summary: summary,
Body: body,
Urgency: u,
Icon: ResolveIcon(appIcon),
Actions: ParseActions(actions),
Created: now,
}
var raw *RawImage
if r, ok := ImageDataFromHints(hints); ok {
raw = r
} else if path, ok := ImagePathFromHints(hints); ok {
n.Image = ResolveIcon(path)
} else if r, ok := IconDataFromHints(hints); ok {
raw = r
}
if raw != nil {
if data, err := raw.PNG(); err == nil {
pendingImage = data
} else {
log.Printf("notifyd: encode image: %v", err)
}
}
if ms > 0 {
n.Expires = now + ms
}
id, _ := s.store.Add(n, tag, replacesID)
if pendingImage != nil {
if path, err := WriteImage(s.dir, id, pendingImage); err == nil {
s.store.SetImage(id, path)
} else {
log.Printf("notifyd: write image: %v", err)
}
}
s.arm(id, ms)
return id, nil
}
// CloseNotification is the spec's programmatic close, reason 3.
func (s *Service) CloseNotification(id uint32) *dbus.Error {
s.stopTimer(id)
s.store.Dismiss(id, 3)
return nil
}
func (s *Service) arm(id uint32, ms int64) {
s.mu.Lock()
defer s.mu.Unlock()
s.stopTimerLocked(id)
if ms <= 0 {
return
}
var t *time.Timer
t = time.AfterFunc(time.Duration(ms)*time.Millisecond, func() {
s.mu.Lock()
current := s.timers[id] == t
if current {
delete(s.timers, id)
}
s.mu.Unlock()
// Only the current timer may expire the id: a timer left over from a
// replaced notification must not close its successor.
if current {
s.store.Expire(id)
}
})
s.timers[id] = t
}
func (s *Service) stopTimer(id uint32) {
s.mu.Lock()
defer s.mu.Unlock()
s.stopTimerLocked(id)
}
func (s *Service) stopTimerLocked(id uint32) {
if t, ok := s.timers[id]; ok {
t.Stop()
delete(s.timers, id)
}
}
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