// Fetch an event of watching list, if there's no event available the function would blocked
func (man *Watchman) PullEvent() (router.Message, error) {
raw, err := man.client.Read()
if err != nil {
return router.Message{}, err
}
m, err := router.ParseMessage(raw)
if err != nil {
return router.Message{}, err
}
fn := ""
for name, _ := range man.paths {
if inWatch(m.FileName, name) {
fn = name
break
}
}
if _, ok := man.paths[fn]; ok && m.Event == 0x0 {
return m, errors.New("SYSTEM")
}
if m.Event == 0x0 || fn == "" || man.paths[fn]&m.Event == 0 {
return m, errors.New("You dont' need it.")
}
m.Event = m.Event & man.paths[fn]
return m, nil
}
// The request message must like:
//{
// "Event":0,
// "FileName":"+/path/to/file", or "FileName":"-/path/to/file" // +/- means add or remove watch
// ....
//}
func (em *Distributer) PullRequest() (map[string]string, error) {
str, err := em.Read()
if err != nil {
logging.Debug("Pull request:", err)
return nil, err
}
m, err := router.ParseMessage(str)
if err != nil {
logging.Debug("Pull request:", err)
return nil, err
}
if m.Event != 0 {
return nil, errors.New("Invalid request")
}
msg := make(map[string]string)
if strings.HasPrefix(m.FileName, "+") {
msg["ACTION"] = "ADD"
msg["PATH"] = strings.TrimLeft(m.FileName, "+")
return msg, nil
} else if strings.HasPrefix(m.FileName, "-") {
msg["ACTION"] = "REMOVE"
msg["PATH"] = strings.TrimLeft(m.FileName, "-")
return msg, nil
}
return nil, errors.New("Shouldn't come here")
}