// Returns true if the given text represents a valid @username
func UsernameIsValid(username string) bool {
if username == "" {
return false
}
extracted := extract.ExtractMentionedScreenNames(username)
return len(extracted) == 1 && extracted[0].Text == username
}
func post(user *User, status string) error {
postId, err := redis.Int(conn.Do("INCR", "next_post_id"))
if err != nil {
return err
}
status = strings.Replace(status, "\n", " ", -1)
_, err = conn.Do("HMSET", fmt.Sprintf("post:%d", postId), "user_id", user.Id, "time", time.Now().Unix(), "body", status)
if err != nil {
return err
}
followers, err := redis.Strings(conn.Do("ZRANGE", "followers:"+user.Id, 0, -1))
if err != nil {
return err
}
recipients := mapset.NewSet()
for _, fId := range followers {
recipients.Add(fId)
}
entities := extract.ExtractMentionedScreenNames(status)
for _, e := range entities {
username, _ := e.ScreenName()
profile, err := profileByUsername(username)
if err == nil {
recipients.Add(profile.Id)
}
}
recipients.Add(user.Id)
for fId := range recipients.Iter() {
str, ok := fId.(string)
if ok {
conn.Do("LPUSH", "posts:"+str, postId)
}
}
_, err = conn.Do("LPUSH", "timeline", postId)
if err != nil {
return err
}
_, err = conn.Do("LTRIM", "timeline", 0, 1000)
if err != nil {
return err
}
return nil
}