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server.go
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server.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 (
"context"
"net/http"
"os"
"sync"
"github.com/gin-gonic/gin"
"go.uber.org/atomic"
"github.com/e154/smart-home/adaptors"
"github.com/e154/smart-home/common/apperr"
m "github.com/e154/smart-home/models"
"github.com/e154/smart-home/system/bus"
"github.com/e154/smart-home/system/scripts"
)
// Server ...
type Server struct {
engine *gin.Engine
isStarted *atomic.Bool
addressPort *string
server *http.Server
skillLock *sync.Mutex
skills map[string]*Skill
adaptors *adaptors.Adaptors
config Config
scriptService scripts.ScriptService
//gate *client.GateClient
eventBus bus.Bus
}
// NewServer ...
func NewServer(adaptors *adaptors.Adaptors,
config Config,
scriptService scripts.ScriptService,
//gateClient *gate_client.GateClient,
eventBus bus.Bus) *Server {
return &Server{
isStarted: atomic.NewBool(false),
adaptors: adaptors,
skillLock: &sync.Mutex{},
skills: make(map[string]*Skill),
config: config,
scriptService: scriptService,
//gate: gateClient,
eventBus: eventBus,
}
}
// Start ...
func (s *Server) Start() {
if !s.isStarted.CompareAndSwap(false, true) {
return
}
s.init()
logger := NewLogger()
gin.DisableConsoleColor()
gin.DefaultWriter = logger
gin.DefaultErrorWriter = logger
gin.SetMode(gin.ReleaseMode)
s.engine = gin.New()
s.engine.POST("/*any", s.Auth, s.handlerFunc)
s.server = &http.Server{
Addr: s.config.String(),
Handler: s.engine,
}
go func() {
if err := s.server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
log.Fatalf("listen: %s", err.Error())
}
}()
//todo fix
//s.gate.SetAlexaApiEngine(s.engine)
log.Infof("Serving server at %s", s.config.String())
}
func (s *Server) init() {
list, err := s.adaptors.AlexaSkill.ListEnabled(context.Background(), 999, 0)
if err != nil {
log.Error(err.Error())
return
}
for _, skill := range list {
s.AddSkill(skill)
}
}
// Stop ...
func (s *Server) Stop() {
if !s.isStarted.CompareAndSwap(true, false) {
return
}
//todo fix
//s.gate.SetAlexaApiEngine(nil)
if s.server != nil {
_ = s.server.Close()
}
}
func (s *Server) handlerFunc(ctx *gin.Context) {
log.Info("new request")
req := &Request{}
if err := ctx.ShouldBindJSON(req); err != nil {
log.Error(err.Error())
_ = ctx.AbortWithError(400, err)
return
}
resp := NewResponse()
switch req.GetRequestType() {
case "LaunchRequest":
s.OnLaunchHandler(ctx, req, resp)
case "IntentRequest":
s.OnIntentHandle(ctx, req, resp)
case "SessionEndedRequest":
s.OnSessionEndedHandler(ctx, req, resp)
case "AudioPlayer":
s.OnAudioPlayerHandler(ctx, req, resp)
default:
http.Error(ctx.Writer, "Invalid request.", http.StatusBadRequest)
}
ctx.Writer.Header().Set("Content-Type", "application/json;charset=UTF-8")
b, _ := resp.String()
_, _ = ctx.Writer.Write(b)
}
// OnLaunchHandler ...
func (s *Server) OnLaunchHandler(ctx *gin.Context, req *Request, resp *Response) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
if skill, ok := s.skills[req.Context.System.Application.ApplicationID]; ok {
skill.OnLaunch(ctx, req, resp)
}
}
// OnIntentHandle ...
func (s *Server) OnIntentHandle(ctx *gin.Context, req *Request, resp *Response) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
if skill, ok := s.skills[req.Context.System.Application.ApplicationID]; ok {
skill.OnIntent(ctx, req, resp)
}
}
// OnSessionEndedHandler ...
func (s *Server) OnSessionEndedHandler(ctx *gin.Context, req *Request, resp *Response) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
if skill, ok := s.skills[req.Context.System.Application.ApplicationID]; ok {
skill.OnSessionEnded(ctx, req, resp)
}
}
// OnAudioPlayerHandler ...
func (s *Server) OnAudioPlayerHandler(ctx *gin.Context, req *Request, resp *Response) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
for _, skill := range s.skills {
if skill.GetAppID() != req.Context.System.Application.ApplicationID {
continue
}
//todo check
//if skill.OnAudioPlayerState != nil {
// skill.OnAudioPlayerState(ctx, req, resp)
//}
}
}
// Auth ...
func (s Server) Auth(ctx *gin.Context) {
if os.Getenv("DEV") == "true" {
return
}
if !IsValidAlexaRequest(ctx.Writer, ctx.Request) {
_ = ctx.AbortWithError(401, apperr.ErrBadRequestParams)
return
}
}
// AddSkill ...
func (s *Server) AddSkill(skill *m.AlexaSkill) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
if _, ok := s.skills[skill.SkillId]; !ok {
s.skills[skill.SkillId] = NewSkill(skill, s.adaptors, s.scriptService, s.eventBus)
}
}
// UpdateSkill ...
func (s *Server) UpdateSkill(skill *m.AlexaSkill) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
s.skills[skill.SkillId] = NewSkill(skill, s.adaptors, s.scriptService, s.eventBus)
}
// DeleteSkill ...
func (s *Server) DeleteSkill(skill *m.AlexaSkill) {
s.skillLock.Lock()
defer s.skillLock.Unlock()
if _, ok := s.skills[skill.SkillId]; !ok {
delete(s.skills, skill.SkillId)
}
}