int isUserOnChan(struct UserNode *user, struct ChanNode *chan);
struct ChanUser* getChanUser(struct UserNode *user, struct ChanNode *chan);
struct ChanUser* getChannelUsers(struct ChanNode *chan, struct ChanUser *last);
int isUserOnChan(struct UserNode *user, struct ChanNode *chan);
struct ChanUser* getChanUser(struct UserNode *user, struct ChanNode *chan);
struct ChanUser* getChannelUsers(struct ChanNode *chan, struct ChanUser *last);