func prepareAttrValues(topic *string, startTime *string, endTime *string) *map[string]*dynamodb.AttributeValue {
if !midutil.IsNullOrEmpty(topic) && !midutil.IsNullOrEmpty(startTime) && !midutil.IsNullOrEmpty(endTime) {
return &map[string]*dynamodb.AttributeValue{
":v_topic": &dynamodb.AttributeValue{ // Required
S: topic,
},
":v_startTime": &dynamodb.AttributeValue{ // Required
N: startTime,
},
":v_endTime": &dynamodb.AttributeValue{ // Required
N: endTime,
},
}
}
if !midutil.IsNullOrEmpty(topic) {
log.Info("startTime is nill*****")
return &map[string]*dynamodb.AttributeValue{
":v_topic": &dynamodb.AttributeValue{ // Required
S: topic,
},
}
}
return &map[string]*dynamodb.AttributeValue{}
}
func prepareKeyCondition(topic *string, startTime *string, endTime *string) *string {
if !midutil.IsNullOrEmpty(topic) && !midutil.IsNullOrEmpty(startTime) && !midutil.IsNullOrEmpty(endTime) {
return aws.String("topic = :v_topic AND #ts BETWEEN :v_startTime AND :v_endTime")
}
if !midutil.IsNullOrEmpty(topic) {
return aws.String("topic = :v_topic")
}
return nil
}
// topics
func GetTopics(rw http.ResponseWriter, req *http.Request) {
token := req.FormValue("token")
callback := req.FormValue("callback")
output, err := SvcSns.ListTopics(&sns.ListTopicsInput{NextToken: aws.String(token)})
if err != nil {
midutil.LogAWSRequestErr(rw, req, err)
return
}
if !midutil.IsNullOrEmpty(&callback) {
Render.JSONP(rw, http.StatusOK, callback, output)
} else {
Render.JSON(rw, http.StatusOK, output)
}
}
// by time range: play/{topic}?start=12345&end=67890
func Playback(rw http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
callback := req.FormValue("callback")
// query db for playback list
topic := vars["topic"]
startTime := req.FormValue("start")
endTime := req.FormValue("end")
var queryInput *dynamodb.QueryInput
lastKey := map[string]*dynamodb.AttributeValue{}
lastKey = nil
for {
log.Println("topic:", topic)
log.Println("startTime:", startTime)
log.Println("endTime:", endTime)
queryInput = prepareQuery(&topic, &startTime, &endTime, &lastKey)
resp, err := SvcDynamo.Query(queryInput)
if err != nil {
midutil.LogAWSRequestErr(rw, req, err)
return
}
processResponse(resp)
lastKey = resp.LastEvaluatedKey
if lastKey == nil {
if !midutil.IsNullOrEmpty(&callback) {
Render.JSONP(rw, http.StatusOK, callback, resp)
} else {
Render.JSON(rw, http.StatusOK, resp)
}
break
} else {
log.Info("***Paging", lastKey)
}
}
log.Println("playback suceeded!")
}
// by time range: notifications/{topic}?start=12345&end=67890
func GetNotifications(rw http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
callback := req.FormValue("callback")
// query db for playback list
topic := vars["topic"]
startTime := req.FormValue("start")
endTime := req.FormValue("end")
var queryInput *dynamodb.QueryInput
lastKey := map[string]*dynamodb.AttributeValue{}
lastKey = nil
queryInput = prepareQuery(&topic, &startTime, &endTime, &lastKey)
resp, err := SvcDynamo.Query(queryInput)
if err != nil {
midutil.LogAWSRequestErr(rw, req, err)
return
}
if lastKey == nil {
log.Println("lastKey is nil")
} else {
log.Println("lastKey is NOT nil")
}
// convertNotification(resp)
if !midutil.IsNullOrEmpty(&callback) {
Render.JSONP(rw, http.StatusOK, callback, resp)
} else {
Render.JSON(rw, http.StatusOK, resp)
}
}