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package service
import (
"fmt"
"github.com/godbus/dbus/v5"
"github.com/muka/go-bluetooth/api"
"github.com/muka/go-bluetooth/bluez"
"github.com/muka/go-bluetooth/bluez/profile/gatt"
log "github.com/sirupsen/logrus"
)
type Service struct {
UUID string
app *App
path dbus.ObjectPath
Properties *gatt.GattService1Properties
chars map[dbus.ObjectPath]*Char
iprops *api.DBusProperties
}
func (s *Service) DBusProperties() *api.DBusProperties {
return s.iprops
}
func (s *Service) Path() dbus.ObjectPath {
return s.path
}
func (s *Service) Interface() string {
return gatt.GattService1Interface
}
func (s *Service) GetProperties() bluez.Properties {
chars := []dbus.ObjectPath{}
for cpath := range s.chars {
chars = append(chars, cpath)
}
s.Properties.Characteristics = chars
return s.Properties
}
func (s *Service) App() *App {
return s.app
}
func (s *Service) DBusObjectManager() *api.DBusObjectManager {
return s.App().DBusObjectManager()
}
func (s *Service) DBusConn() *dbus.Conn {
return s.App().DBusConn()
}
// Expose service to dbus
func (s *Service) Expose() error {
return api.ExposeDBusService(s)
}
// Remove service from dbus
func (s *Service) Remove() error {
return api.RemoveDBusService(s)
}
func (s *Service) GetChars() map[dbus.ObjectPath]*Char {
return s.chars
}
// NewChar Create a new characteristic
func (s *Service) NewChar(uuid string) (*Char, error) {
char := new(Char)
char.UUID = s.App().GenerateUUID(uuid)
char.path = dbus.ObjectPath(
fmt.Sprintf("%s/char%d", s.Path(), len(s.GetChars())),
)
char.app = s.App()
char.service = s
char.descr = make(map[dbus.ObjectPath]*Descr)
char.Properties = NewGattCharacteristic1Properties(char.UUID)
iprops, err := api.NewDBusProperties(s.App().DBusConn())
if err != nil {
return nil, err
}
char.iprops = iprops
return char, nil
}
func (s *Service) AddChar(char *Char) error {
s.chars[char.Path()] = char
err := api.ExposeDBusService(char)
if err != nil {
return err
}
err = s.DBusObjectManager().AddObject(char.Path(), map[string]bluez.Properties{
char.Interface(): char.GetProperties(),
})
if err != nil {
return err
}
// update OM service rapresentation also
err = s.DBusObjectManager().AddObject(s.Path(), map[string]bluez.Properties{
s.Interface(): s.GetProperties(),
})
if err != nil {
return err
}
log.Tracef("Added GATT Characteristic UUID=%s %s", char.UUID, char.Path())
err = s.App().ExportTree()
return err
}
// RemoveChar remove a characteristic from the service
func (s *Service) RemoveChar(char *Char) error {
// todo unregister properties
if _, ok := s.chars[char.Path()]; !ok {
return nil
}
for _, descr := range char.GetDescr() {
err := char.RemoveDescr(descr)
if err != nil {
return err
}
}
// remove the char from the three
err := s.DBusObjectManager().RemoveObject(s.Path())
if err != nil {
return err
}
// update OM service rapresentation also
err = s.DBusObjectManager().AddObject(s.Path(), map[string]bluez.Properties{
s.Interface(): s.GetProperties(),
})
if err != nil {
return err
}
// err = s.ExportTree()
// if err != nil {
// return err
// }
delete(s.chars, char.Path())
return nil
}
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