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api_route_event.go
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/
api_route_event.go
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package route
import (
"fmt"
"io/ioutil"
"net"
"net/http"
"time"
"github.com/IceWhaleTech/CasaOS-Common/utils"
"github.com/IceWhaleTech/CasaOS-Common/utils/logger"
"github.com/IceWhaleTech/CasaOS-MessageBus/codegen"
"github.com/IceWhaleTech/CasaOS-MessageBus/common"
"github.com/IceWhaleTech/CasaOS-MessageBus/model"
"github.com/IceWhaleTech/CasaOS-MessageBus/route/adapter/in"
"github.com/IceWhaleTech/CasaOS-MessageBus/route/adapter/out"
"github.com/gobwas/ws"
"github.com/gobwas/ws/wsutil"
"github.com/google/uuid"
"github.com/labstack/echo/v4"
"go.uber.org/zap"
)
func (r *APIRoute) GetEventTypes(ctx echo.Context) error {
eventTypes, err := r.services.EventTypeService.GetEventTypes()
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusInternalServerError, codegen.ResponseInternalServerError{Message: &message})
}
results := make([]codegen.EventType, 0)
for _, eventType := range eventTypes {
results = append(results, out.EventTypeAdapter(eventType))
}
return ctx.JSON(http.StatusOK, results)
}
func (r *APIRoute) RegisterEventTypes(ctx echo.Context) error {
var eventTypes []codegen.EventType
if err := ctx.Bind(&eventTypes); err != nil {
message := err.Error()
return ctx.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
for _, eventType := range eventTypes {
_, err := r.services.EventTypeService.RegisterEventType(in.EventTypeAdapter(eventType))
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
}
return ctx.JSON(http.StatusOK, codegen.ResponseOK{})
}
func (r *APIRoute) GetEventTypesBySourceID(ctx echo.Context, sourceID codegen.SourceID) error {
results, err := r.services.EventTypeService.GetEventTypesBySourceID(sourceID)
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
return ctx.JSON(http.StatusOK, results)
}
func (r *APIRoute) GetEventType(ctx echo.Context, sourceID codegen.SourceID, name codegen.EventName) error {
result, err := r.services.EventTypeService.GetEventType(sourceID, name)
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusNotFound, codegen.ResponseNotFound{Message: &message})
}
if result == nil {
return ctx.JSON(http.StatusNotFound, codegen.ResponseNotFound{Message: utils.Ptr("not found")})
}
return ctx.JSON(http.StatusOK, result)
}
func (r *APIRoute) PublishEvent(ctx echo.Context, sourceID codegen.SourceID, name codegen.EventName) error {
eventType, err := r.services.EventTypeService.GetEventType(sourceID, name)
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusNotFound, codegen.ResponseNotFound{Message: &message})
}
if eventType == nil {
return ctx.JSON(http.StatusNotFound, codegen.ResponseNotFound{Message: utils.Ptr("not found")})
}
var properties map[string]string
body, err := ioutil.ReadAll(ctx.Request().Body)
if err != nil {
message := err.Error()
return ctx.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
if err = json.Unmarshal(body, &properties); err != nil {
message := err.Error()
return ctx.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
uuidStr := uuid.New().String()
event := in.EventAdapter(codegen.Event{
SourceID: sourceID,
Name: name,
Properties: properties,
Timestamp: utils.Ptr(time.Now()),
Uuid: &uuidStr,
})
go r.services.SocketIOService.Publish(event)
go r.services.EventServiceWS.Publish(event)
return ctx.JSON(http.StatusOK, out.EventAdapter(event))
}
func (r *APIRoute) SubscribeEventWS(c echo.Context, sourceID codegen.SourceID, params codegen.SubscribeEventWSParams) error {
var eventNames []string
if params.Names != nil {
for _, eventName := range *params.Names {
eventType, err := r.services.EventTypeService.GetEventType(sourceID, eventName)
if err != nil {
message := err.Error()
return c.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
if eventType == nil {
return c.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: utils.Ptr(fmt.Sprintf("event type `%s` of source ID `%s` not found", eventName, sourceID))})
}
eventNames = append(eventNames, eventName)
}
} else {
eventTypes, err := r.services.EventTypeService.GetEventTypesBySourceID(sourceID)
if err != nil || len(eventTypes) == 0 {
if err != nil {
message := err.Error()
return c.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
message := "event types not found"
return c.JSON(http.StatusBadRequest, codegen.ResponseBadRequest{Message: &message})
}
for _, eventType := range eventTypes {
eventNames = append(eventNames, eventType.Name)
}
}
conn, _, _, err := ws.UpgradeHTTP(c.Request(), c.Response())
if err != nil {
message := err.Error()
return c.JSON(http.StatusInternalServerError, codegen.ResponseInternalServerError{Message: &message})
}
channel, err := r.services.EventServiceWS.Subscribe(sourceID, eventNames)
if err != nil {
conn.Close() // need to close connection here, instead of defer, because of the goroutine
message := err.Error()
return c.JSON(http.StatusInternalServerError, codegen.ResponseInternalServerError{Message: &message})
}
go func(conn net.Conn, channel chan model.Event, eventNames []string) {
defer conn.Close()
defer close(channel)
defer func(eventNames []string) {
for _, name := range eventNames {
if err := r.services.EventServiceWS.Unsubscribe(sourceID, name, channel); err != nil {
logger.Error("error when trying to unsubscribe an event type via websocket", zap.Error(err), zap.String("source_id", sourceID), zap.String("name", name))
}
}
}(eventNames)
logger.Info("a websocket connection has started for events", zap.String("remote_addr", conn.RemoteAddr().String()))
for {
event, ok := <-channel
if !ok {
logger.Info("websocket channel for events is closed")
return
}
if event.SourceID == common.MessageBusSourceID && event.Name == common.MessageBusHeartbeatName {
if err := wsutil.WriteServerMessage(conn, ws.OpPing, []byte{}); err != nil {
logger.Error("error when trying to send ping message via websocket", zap.Error(err))
return
}
continue
}
message, err := json.Marshal(out.EventAdapter(event))
if err != nil {
logger.Error("error when trying to marshal event for websocket", zap.Error(err))
continue
}
logger.Info("sending event via websocket", zap.String("remote_addr", conn.RemoteAddr().String()), zap.String("message", string(message)))
if err := wsutil.WriteServerText(conn, message); err != nil {
if _, ok := err.(*net.OpError); ok {
logger.Info("websocket connection ended", zap.String("error", err.Error()))
} else {
logger.Error("error when sending event via websocket", zap.String("error", err.Error()))
}
return
}
}
}(conn, channel, eventNames)
return nil
}