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trigger.go
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trigger.go
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// This file is part of the Smart Home
// Program complex distribution https://github.com/e154/smart-home
// Copyright (C) 2016-2023, Filippov Alex
//
// This library is free software: you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library. If not, see
// <https://www.gnu.org/licenses/>.
package alexa
import (
"fmt"
"sync"
"github.com/e154/smart-home/plugins/triggers"
"github.com/e154/smart-home/system/bus"
)
var _ triggers.ITrigger = (*Trigger)(nil)
const (
// TriggerName ...
TriggerName = "alexa"
// TriggerFunctionName ...
TriggerFunctionName = "automationTriggerAlexa"
)
// Trigger ...
type Trigger struct {
eventBus bus.Bus
msgQueue bus.Bus
functionName string
name string
}
// NewTrigger ...
func NewTrigger(eventBus bus.Bus) (tr triggers.ITrigger) {
return &Trigger{
eventBus: eventBus,
msgQueue: bus.NewBus(),
functionName: TriggerFunctionName,
name: TriggerName,
}
}
// Name ...
func (t Trigger) Name() string {
return t.name
}
// AsyncAttach ...
func (t Trigger) AsyncAttach(wg *sync.WaitGroup) {
if err := t.eventBus.Subscribe(TopicPluginAlexa, t.eventHandler); err != nil {
log.Error(err.Error())
}
wg.Done()
}
func (t *Trigger) eventHandler(topic string, msg interface{}) {
switch v := msg.(type) {
case EventAlexaAction:
t.msgQueue.Publish(fmt.Sprintf("skill_%d", v.SkillId), v)
}
}
// Subscribe ...
func (t Trigger) Subscribe(options triggers.Subscriber) error {
if options.Payload == nil {
return fmt.Errorf("trigger '%s' subscribe to empty topic", t.name)
}
topic := t.topic(options.Payload[TriggerOptionSkillId].Int64())
log.Infof("trigger '%s' subscribe topic '%s'", t.name, topic)
return t.msgQueue.Subscribe(topic, options.Handler)
}
// Unsubscribe ...
func (t Trigger) Unsubscribe(options triggers.Subscriber) error {
if options.Payload == nil {
return fmt.Errorf("trigger '%s' unsubscribe from empty topic", t.name)
}
topic := t.topic(options.Payload[TriggerOptionSkillId].Int64())
log.Infof("trigger '%s' unsubscribe topic '%s'", t.name, topic)
return t.msgQueue.Unsubscribe(topic, options.Handler)
}
// FunctionName ...
func (t Trigger) FunctionName() string {
return t.functionName
}
func (t Trigger) topic(n int64) string {
return fmt.Sprintf("skill_%d", n)
}
// CallManual ...
func (t Trigger) CallManual() {
log.Warn("method not implemented")
}