source: code/trunk/irc.go@ 20

package jounce

import (
        "fmt"
        "strings"
)

const (
        rpl_localusers   = "265"
        rpl_globalusers  = "266"
        rpl_topicwhotime = "333"
)

type modeSet string

func (ms modeSet) Has(c byte) bool {
        return strings.IndexByte(string(ms), c) >= 0
}

func (ms *modeSet) Add(c byte) {
        if !ms.Has(c) {
                *ms += modeSet(c)
        }
}

func (ms *modeSet) Del(c byte) {
        i := strings.IndexByte(string(*ms), c)
        if i >= 0 {
                *ms = (*ms)[:i] + (*ms)[i+1:]
        }
}

func (ms *modeSet) Apply(s string) error {
        var plusMinus byte
        for i := 0; i < len(s); i++ {
                switch c := s[i]; c {
                case '+', '-':
                        plusMinus = c
                default:
                        switch plusMinus {
                        case '+':
                                ms.Add(c)
                        case '-':
                                ms.Del(c)
                        default:
                                return fmt.Errorf("malformed modestring %q: missing plus/minus", s)
                        }
                }
        }
        return nil
}

type channelStatus byte

const (
        channelPublic  channelStatus = '='
        channelSecret  channelStatus = '@'
        channelPrivate channelStatus = '*'
)

func parseChannelStatus(s string) (channelStatus, error) {
        if len(s) > 1 {
                return 0, fmt.Errorf("invalid channel status %q: more than one character", s)
        }
        switch cs := channelStatus(s[0]); cs {
        case channelPublic, channelSecret, channelPrivate:
                return cs, nil
        default:
                return 0, fmt.Errorf("invalid channel status %q: unknown status", s)
        }
}

type membership byte

const (
        membershipFounder   membership = '~'
        membershipProtected membership = '&'
        membershipOperator  membership = '@'
        membershipHalfOp    membership = '%'
        membershipVoice     membership = '+'
)

const stdMembershipPrefixes = "~&@%+"

func parseMembershipPrefix(s string) (prefix membership, nick string) {
        // TODO: any prefix from PREFIX RPL_ISUPPORT
        if strings.IndexByte(stdMembershipPrefixes, s[0]) >= 0 {
                return membership(s[0]), s[1:]
        } else {
                return 0, s
        }
}