func (l *List) PlayDescriptor(ld generator.VideoDescriptor) error {
params := ld.Params
listId := params["list_id"]
startString := params["start_at"]
start, _ := strconv.Atoi(startString)
list := datastore.List{Id: listId}
programIds, err := list.Get()
if err != nil {
return err
}
segmentsToHold := start
for i := 0; i < len(programIds); i++ {
if updatedIds, err := list.Get(); err == nil {
programIds = updatedIds
}
if hasIndex := (len(programIds) > i); !hasIndex {
return nil
}
program, err := datastore.GetProgram(programIds[i])
if err != nil {
continue
}
childPipeline := generator.RunProgram(program)
mediaChannel := childPipeline.MediaChannel()
childPipeline.Close()
for moreComing := true; moreComing; {
select {
case descriptor, more := <-mediaChannel:
if more {
if segmentsToHold > 0 {
segmentsToHold--
} else {
l.Output <- descriptor
}
} else {
moreComing = false
}
case <-l.CancelChan:
return errors.New("cancelled")
}
}
if updatedIds, err := list.Get(); err == nil {
programIds = updatedIds
}
}
return nil
}
func (lac ListAPIController) ServeHTTP(w http.ResponseWriter, r *http.Request) {
l := datastore.List{Id: r.URL.Path}
if r.Method == "POST" {
bytes, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, "Error reading request body", 500)
return
}
var newList []string
if err := json.Unmarshal(bytes, &newList); err != nil {
http.Error(w, "Error parsing request body JSON", 400)
log.Println(string(bytes))
return
}
if err := l.Set(newList); err != nil {
http.Error(w, "Error saving list", 500)
return
}
}
items, err := l.Get()
if err != nil {
http.Error(w, "Error getting list", 500)
return
}
bytes, err := json.Marshal(items)
if err != nil {
http.Error(w, "Error rendering list", 500)
return
}
w.Header().Add("Content-Type", "application/json")
fmt.Fprintln(w, string(bytes))
}