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- // Copyright (c) 2012-2014 Jeremy Latt
- // Copyright (c) 2014-2015 Edmund Huber
- // Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
- // released under the MIT license
-
- package irc
-
- import (
- "errors"
- "fmt"
- "strconv"
- "time"
-
- "sync"
-
- "github.com/goshuirc/irc-go/ircmsg"
- "github.com/oragono/oragono/irc/caps"
- )
-
- var (
- ChannelAlreadyRegistered = errors.New("Channel is already registered")
- )
-
- // Channel represents a channel that clients can join.
- type Channel struct {
- flags ModeSet
- lists map[Mode]*UserMaskSet
- key string
- members MemberSet
- membersCache []*Client // allow iteration over channel members without holding the lock
- membersCacheMutex sync.Mutex // tier 2; see `regenerateMembersCache`
- name string
- nameCasefolded string
- server *Server
- createdTime time.Time
- registeredFounder string
- registeredTime time.Time
- stateMutex sync.RWMutex // tier 1
- topic string
- topicSetBy string
- topicSetTime time.Time
- userLimit uint64
- }
-
- // NewChannel creates a new channel from a `Server` and a `name`
- // string, which must be unique on the server.
- func NewChannel(s *Server, name string, addDefaultModes bool, regInfo *RegisteredChannel) *Channel {
- casefoldedName, err := CasefoldChannel(name)
- if err != nil {
- s.logger.Error("internal", fmt.Sprintf("Bad channel name %s: %v", name, err))
- return nil
- }
-
- channel := &Channel{
- createdTime: time.Now(), // may be overwritten by applyRegInfo
- flags: make(ModeSet),
- lists: map[Mode]*UserMaskSet{
- BanMask: NewUserMaskSet(),
- ExceptMask: NewUserMaskSet(),
- InviteMask: NewUserMaskSet(),
- },
- members: make(MemberSet),
- name: name,
- nameCasefolded: casefoldedName,
- server: s,
- }
-
- if addDefaultModes {
- for _, mode := range s.DefaultChannelModes() {
- channel.flags[mode] = true
- }
- }
-
- if regInfo != nil {
- channel.applyRegInfo(regInfo)
- }
-
- return channel
- }
-
- // read in channel state that was persisted in the DB
- func (channel *Channel) applyRegInfo(chanReg *RegisteredChannel) {
- channel.registeredFounder = chanReg.Founder
- channel.registeredTime = chanReg.RegisteredAt
- channel.topic = chanReg.Topic
- channel.topicSetBy = chanReg.TopicSetBy
- channel.topicSetTime = chanReg.TopicSetTime
- channel.name = chanReg.Name
- channel.createdTime = chanReg.RegisteredAt
- for _, mask := range chanReg.Banlist {
- channel.lists[BanMask].Add(mask)
- }
- for _, mask := range chanReg.Exceptlist {
- channel.lists[ExceptMask].Add(mask)
- }
- for _, mask := range chanReg.Invitelist {
- channel.lists[InviteMask].Add(mask)
- }
- }
-
- // obtain a consistent snapshot of the channel state that can be persisted to the DB
- func (channel *Channel) ExportRegistration(includeLists bool) (info RegisteredChannel) {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- info.Name = channel.name
- info.Topic = channel.topic
- info.TopicSetBy = channel.topicSetBy
- info.TopicSetTime = channel.topicSetTime
- info.Founder = channel.registeredFounder
- info.RegisteredAt = channel.registeredTime
-
- if includeLists {
- for mask := range channel.lists[BanMask].masks {
- info.Banlist = append(info.Banlist, mask)
- }
- for mask := range channel.lists[ExceptMask].masks {
- info.Exceptlist = append(info.Exceptlist, mask)
- }
- for mask := range channel.lists[InviteMask].masks {
- info.Invitelist = append(info.Invitelist, mask)
- }
- }
-
- return
- }
-
- // SetRegistered registers the channel, returning an error if it was already registered.
- func (channel *Channel) SetRegistered(founder string) error {
- channel.stateMutex.Lock()
- defer channel.stateMutex.Unlock()
-
- if channel.registeredFounder != "" {
- return ChannelAlreadyRegistered
- }
- channel.registeredFounder = founder
- channel.registeredTime = time.Now()
- return nil
- }
-
- // IsRegistered returns whether the channel is registered.
- func (channel *Channel) IsRegistered() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return channel.registeredFounder != ""
- }
-
- func (channel *Channel) regenerateMembersCache(noLocksNeeded bool) {
- // this is eventually consistent even without holding stateMutex.Lock()
- // throughout the update; all updates to `members` while holding Lock()
- // have a serial order, so the call to `regenerateMembersCache` that
- // happens-after the last one will see *all* the updates. then,
- // `membersCacheMutex` ensures that this final read is correctly paired
- // with the final write to `membersCache`.
- if !noLocksNeeded {
- channel.membersCacheMutex.Lock()
- defer channel.membersCacheMutex.Unlock()
- channel.stateMutex.RLock()
- }
-
- result := make([]*Client, len(channel.members))
- i := 0
- for client := range channel.members {
- result[i] = client
- i++
- }
- if !noLocksNeeded {
- channel.stateMutex.RUnlock()
- channel.stateMutex.Lock()
- }
- channel.membersCache = result
- if !noLocksNeeded {
- channel.stateMutex.Unlock()
- }
- }
-
- // Names sends the list of users joined to the channel to the given client.
- func (channel *Channel) Names(client *Client) {
- currentNicks := channel.nicks(client)
- // assemble and send replies
- maxNamLen := 480 - len(client.server.name) - len(client.nick)
- var buffer string
- for _, nick := range currentNicks {
- if buffer == "" {
- buffer += nick
- continue
- }
-
- if len(buffer)+1+len(nick) > maxNamLen {
- client.Send(nil, client.server.name, RPL_NAMREPLY, client.nick, "=", channel.name, buffer)
- buffer = nick
- continue
- }
-
- buffer += " "
- buffer += nick
- }
-
- client.Send(nil, client.server.name, RPL_NAMREPLY, client.nick, "=", channel.name, buffer)
- client.Send(nil, client.server.name, RPL_ENDOFNAMES, client.nick, channel.name, client.t("End of NAMES list"))
- }
-
- // ClientIsAtLeast returns whether the client has at least the given channel privilege.
- func (channel *Channel) ClientIsAtLeast(client *Client, permission Mode) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- // get voice, since it's not a part of ChannelPrivModes
- if channel.members.HasMode(client, permission) {
- return true
- }
-
- // check regular modes
- for _, mode := range ChannelPrivModes {
- if channel.members.HasMode(client, mode) {
- return true
- }
-
- if mode == permission {
- break
- }
- }
-
- return false
- }
-
- // Prefixes returns a list of prefixes for the given set of channel modes.
- func (modes ModeSet) Prefixes(isMultiPrefix bool) string {
- var prefixes string
-
- // add prefixes in order from highest to lowest privs
- for _, mode := range ChannelPrivModes {
- if modes[mode] {
- prefixes += ChannelModePrefixes[mode]
- }
- }
- if modes[Voice] {
- prefixes += ChannelModePrefixes[Voice]
- }
-
- if !isMultiPrefix && len(prefixes) > 1 {
- prefixes = string(prefixes[0])
- }
-
- return prefixes
- }
-
- func (channel *Channel) ClientPrefixes(client *Client, isMultiPrefix bool) string {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- modes, present := channel.members[client]
- if !present {
- return ""
- } else {
- return modes.Prefixes(isMultiPrefix)
- }
- }
-
- func (channel *Channel) ClientHasPrivsOver(client *Client, target *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- clientModes := channel.members[client]
- targetModes := channel.members[target]
- result := false
- for _, mode := range ChannelPrivModes {
- if clientModes[mode] {
- result = true
- // admins cannot kick other admins
- if mode == ChannelAdmin && targetModes[ChannelAdmin] {
- result = false
- }
- break
- } else if channel.members[target][mode] {
- break
- }
- }
- return result
- }
-
- func (channel *Channel) nicks(target *Client) []string {
- isMultiPrefix := (target != nil) && target.capabilities.Has(caps.MultiPrefix)
- isUserhostInNames := (target != nil) && target.capabilities.Has(caps.UserhostInNames)
-
- // slightly cumbersome: get the mutex and copy both the client pointers and
- // the mode prefixes
- channel.stateMutex.RLock()
- length := len(channel.members)
- clients := make([]*Client, length)
- result := make([]string, length)
- i := 0
- for client, modes := range channel.members {
- clients[i] = client
- result[i] = modes.Prefixes(isMultiPrefix)
- i++
- }
- channel.stateMutex.RUnlock()
-
- i = 0
- for i < length {
- if isUserhostInNames {
- result[i] += clients[i].NickMaskString()
- } else {
- result[i] += clients[i].Nick()
- }
- i++
- }
-
- return result
- }
-
- func (channel *Channel) hasClient(client *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- _, present := channel.members[client]
- return present
- }
-
- // <mode> <mode params>
- func (channel *Channel) modeStrings(client *Client) (result []string) {
- isMember := client.HasMode(Operator) || channel.hasClient(client)
- showKey := isMember && (channel.key != "")
- showUserLimit := channel.userLimit > 0
-
- modes := "+"
-
- // flags with args
- if showKey {
- modes += Key.String()
- }
- if showUserLimit {
- modes += UserLimit.String()
- }
-
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- // flags
- for mode := range channel.flags {
- modes += mode.String()
- }
-
- result = []string{modes}
-
- // args for flags with args: The order must match above to keep
- // positional arguments in place.
- if showKey {
- result = append(result, channel.key)
- }
- if showUserLimit {
- result = append(result, strconv.FormatUint(channel.userLimit, 10))
- }
-
- return
- }
-
- // IsFull returns true if this channel is at its' members limit.
- func (channel *Channel) IsFull() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return (channel.userLimit > 0) && (uint64(len(channel.members)) >= channel.userLimit)
- }
-
- // CheckKey returns true if the key is not set or matches the given key.
- func (channel *Channel) CheckKey(key string) bool {
- return (channel.key == "") || (channel.key == key)
- }
-
- func (channel *Channel) IsEmpty() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return len(channel.members) == 0
- }
-
- // Join joins the given client to this channel (if they can be joined).
- //TODO(dan): /SAJOIN and maybe a ForceJoin function?
- func (channel *Channel) Join(client *Client, key string) {
- if channel.hasClient(client) {
- // already joined, no message needs to be sent
- return
- }
-
- if channel.IsFull() {
- client.Send(nil, client.server.name, ERR_CHANNELISFULL, channel.name, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "l"))
- return
- }
-
- if !channel.CheckKey(key) {
- client.Send(nil, client.server.name, ERR_BADCHANNELKEY, channel.name, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "k"))
- return
- }
-
- isInvited := channel.lists[InviteMask].Match(client.nickMaskCasefolded)
- if channel.flags[InviteOnly] && !isInvited {
- client.Send(nil, client.server.name, ERR_INVITEONLYCHAN, channel.name, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "i"))
- return
- }
-
- if channel.lists[BanMask].Match(client.nickMaskCasefolded) &&
- !isInvited &&
- !channel.lists[ExceptMask].Match(client.nickMaskCasefolded) {
- client.Send(nil, client.server.name, ERR_BANNEDFROMCHAN, channel.name, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "b"))
- return
- }
-
- client.server.logger.Debug("join", fmt.Sprintf("%s joined channel %s", client.nick, channel.name))
-
- for _, member := range channel.Members() {
- if member.capabilities.Has(caps.ExtendedJoin) {
- member.Send(nil, client.nickMaskString, "JOIN", channel.name, client.account.Name, client.realname)
- } else {
- member.Send(nil, client.nickMaskString, "JOIN", channel.name)
- }
- }
-
- channel.stateMutex.Lock()
- channel.members.Add(client)
- firstJoin := len(channel.members) == 1
- channel.stateMutex.Unlock()
- channel.regenerateMembersCache(false)
-
- client.addChannel(channel)
-
- // give channel mode if necessary
- newChannel := firstJoin && !channel.IsRegistered()
- var givenMode *Mode
- if client.AccountName() == channel.registeredFounder {
- givenMode = &ChannelFounder
- } else if newChannel {
- givenMode = &ChannelOperator
- }
- if givenMode != nil {
- channel.stateMutex.Lock()
- channel.members[client][*givenMode] = true
- channel.stateMutex.Unlock()
- }
-
- if client.capabilities.Has(caps.ExtendedJoin) {
- client.Send(nil, client.nickMaskString, "JOIN", channel.name, client.account.Name, client.realname)
- } else {
- client.Send(nil, client.nickMaskString, "JOIN", channel.name)
- }
- // don't send topic when it's an entirely new channel
- if !newChannel {
- channel.SendTopic(client)
- }
- channel.Names(client)
- if givenMode != nil {
- for _, member := range channel.Members() {
- member.Send(nil, client.server.name, "MODE", channel.name, fmt.Sprintf("+%v", *givenMode), client.nick)
- }
- }
- }
-
- // Part parts the given client from this channel, with the given message.
- func (channel *Channel) Part(client *Client, message string) {
- if !channel.hasClient(client) {
- client.Send(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
- return
- }
-
- for _, member := range channel.Members() {
- member.Send(nil, client.nickMaskString, "PART", channel.name, message)
- }
- channel.Quit(client)
-
- client.server.logger.Debug("part", fmt.Sprintf("%s left channel %s", client.nick, channel.name))
- }
-
- // SendTopic sends the channel topic to the given client.
- func (channel *Channel) SendTopic(client *Client) {
- if !channel.hasClient(client) {
- client.Send(nil, client.server.name, ERR_NOTONCHANNEL, client.nick, channel.name, client.t("You're not on that channel"))
- return
- }
-
- channel.stateMutex.RLock()
- name := channel.name
- topic := channel.topic
- topicSetBy := channel.topicSetBy
- topicSetTime := channel.topicSetTime
- channel.stateMutex.RUnlock()
-
- if topic == "" {
- client.Send(nil, client.server.name, RPL_NOTOPIC, client.nick, name, client.t("No topic is set"))
- return
- }
-
- client.Send(nil, client.server.name, RPL_TOPIC, client.nick, name, topic)
- client.Send(nil, client.server.name, RPL_TOPICTIME, client.nick, name, topicSetBy, strconv.FormatInt(topicSetTime.Unix(), 10))
- }
-
- // SetTopic sets the topic of this channel, if the client is allowed to do so.
- func (channel *Channel) SetTopic(client *Client, topic string) {
- if !(client.flags[Operator] || channel.hasClient(client)) {
- client.Send(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
- return
- }
-
- if channel.HasMode(OpOnlyTopic) && !channel.ClientIsAtLeast(client, ChannelOperator) {
- client.Send(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
- return
- }
-
- if len(topic) > client.server.limits.TopicLen {
- topic = topic[:client.server.limits.TopicLen]
- }
-
- channel.stateMutex.Lock()
- channel.topic = topic
- channel.topicSetBy = client.nickMaskString
- channel.topicSetTime = time.Now()
- channel.stateMutex.Unlock()
-
- for _, member := range channel.Members() {
- member.Send(nil, client.nickMaskString, "TOPIC", channel.name, topic)
- }
-
- go channel.server.channelRegistry.StoreChannel(channel, false)
- }
-
- // CanSpeak returns true if the client can speak on this channel.
- func (channel *Channel) CanSpeak(client *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- _, hasClient := channel.members[client]
- if channel.flags[NoOutside] && !hasClient {
- return false
- }
- if channel.flags[Moderated] && !channel.ClientIsAtLeast(client, Voice) {
- return false
- }
- if channel.flags[RegisteredOnly] && client.account == &NoAccount {
- return false
- }
- return true
- }
-
- // TagMsg sends a tag message to everyone in this channel who can accept them.
- func (channel *Channel) TagMsg(msgid string, minPrefix *Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client) {
- channel.sendMessage(msgid, "TAGMSG", []caps.Capability{caps.MessageTags}, minPrefix, clientOnlyTags, client, nil)
- }
-
- // sendMessage sends a given message to everyone on this channel.
- func (channel *Channel) sendMessage(msgid, cmd string, requiredCaps []caps.Capability, minPrefix *Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message *string) {
- if !channel.CanSpeak(client) {
- client.Send(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
-
- // for STATUSMSG
- var minPrefixMode Mode
- if minPrefix != nil {
- minPrefixMode = *minPrefix
- }
- for _, member := range channel.Members() {
- if minPrefix != nil && !channel.ClientIsAtLeast(member, minPrefixMode) {
- // STATUSMSG
- continue
- }
- if member == client && !client.capabilities.Has(caps.EchoMessage) {
- continue
- }
-
- canReceive := true
- for _, capName := range requiredCaps {
- if !member.capabilities.Has(capName) {
- canReceive = false
- }
- }
- if !canReceive {
- continue
- }
-
- var messageTagsToUse *map[string]ircmsg.TagValue
- if member.capabilities.Has(caps.MessageTags) {
- messageTagsToUse = clientOnlyTags
- }
-
- if message == nil {
- member.SendFromClient(msgid, client, messageTagsToUse, cmd, channel.name)
- } else {
- member.SendFromClient(msgid, client, messageTagsToUse, cmd, channel.name, *message)
- }
- }
- }
-
- // SplitPrivMsg sends a private message to everyone in this channel.
- func (channel *Channel) SplitPrivMsg(msgid string, minPrefix *Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message SplitMessage) {
- channel.sendSplitMessage(msgid, "PRIVMSG", minPrefix, clientOnlyTags, client, &message)
- }
-
- // SplitNotice sends a private message to everyone in this channel.
- func (channel *Channel) SplitNotice(msgid string, minPrefix *Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message SplitMessage) {
- channel.sendSplitMessage(msgid, "NOTICE", minPrefix, clientOnlyTags, client, &message)
- }
-
- func (channel *Channel) sendSplitMessage(msgid, cmd string, minPrefix *Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message *SplitMessage) {
- if !channel.CanSpeak(client) {
- client.Send(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
-
- // for STATUSMSG
- var minPrefixMode Mode
- if minPrefix != nil {
- minPrefixMode = *minPrefix
- }
- for _, member := range channel.Members() {
- if minPrefix != nil && !channel.ClientIsAtLeast(member, minPrefixMode) {
- // STATUSMSG
- continue
- }
- if member == client && !client.capabilities.Has(caps.EchoMessage) {
- continue
- }
- var tagsToUse *map[string]ircmsg.TagValue
- if member.capabilities.Has(caps.MessageTags) {
- tagsToUse = clientOnlyTags
- }
-
- if message == nil {
- member.SendFromClient(msgid, client, tagsToUse, cmd, channel.name)
- } else {
- member.SendSplitMsgFromClient(msgid, client, tagsToUse, cmd, channel.name, *message)
- }
- }
- }
-
- func (channel *Channel) applyModeMemberNoMutex(client *Client, mode Mode,
- op ModeOp, nick string) *ModeChange {
- if nick == "" {
- //TODO(dan): shouldn't this be handled before it reaches this function?
- client.Send(nil, client.server.name, ERR_NEEDMOREPARAMS, "MODE", client.t("Not enough parameters"))
- return nil
- }
-
- casefoldedName, err := CasefoldName(nick)
- target := channel.server.clients.Get(casefoldedName)
- if err != nil || target == nil {
- client.Send(nil, client.server.name, ERR_NOSUCHNICK, client.nick, nick, client.t("No such nick"))
- return nil
- }
-
- channel.stateMutex.Lock()
- modeset, exists := channel.members[target]
- var already bool
- if exists {
- enable := op == Add
- already = modeset[mode] == enable
- modeset[mode] = enable
- }
- channel.stateMutex.Unlock()
-
- if !exists {
- client.Send(nil, client.server.name, ERR_USERNOTINCHANNEL, client.nick, channel.name, client.t("They aren't on that channel"))
- return nil
- } else if already {
- return nil
- } else {
- return &ModeChange{
- op: op,
- mode: mode,
- arg: nick,
- }
- }
- }
-
- // ShowMaskList shows the given list to the client.
- func (channel *Channel) ShowMaskList(client *Client, mode Mode) {
- // choose appropriate modes
- var rpllist, rplendoflist string
- if mode == BanMask {
- rpllist = RPL_BANLIST
- rplendoflist = RPL_ENDOFBANLIST
- } else if mode == ExceptMask {
- rpllist = RPL_EXCEPTLIST
- rplendoflist = RPL_ENDOFEXCEPTLIST
- } else if mode == InviteMask {
- rpllist = RPL_INVITELIST
- rplendoflist = RPL_ENDOFINVITELIST
- }
-
- nick := client.Nick()
- channel.stateMutex.RLock()
- // XXX don't acquire any new locks in this section, besides Socket.Write
- for mask := range channel.lists[mode].masks {
- client.Send(nil, client.server.name, rpllist, nick, channel.name, mask)
- }
- channel.stateMutex.RUnlock()
-
- client.Send(nil, client.server.name, rplendoflist, nick, channel.name, client.t("End of list"))
- }
-
- func (channel *Channel) applyModeMask(client *Client, mode Mode, op ModeOp, mask string) bool {
- list := channel.lists[mode]
- if list == nil {
- // This should never happen, but better safe than panicky.
- return false
- }
-
- if (op == List) || (mask == "") {
- channel.ShowMaskList(client, mode)
- return false
- }
-
- if !channel.ClientIsAtLeast(client, ChannelOperator) {
- client.Send(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
- return false
- }
-
- if op == Add {
- return list.Add(mask)
- }
-
- if op == Remove {
- return list.Remove(mask)
- }
-
- return false
- }
-
- // Quit removes the given client from the channel
- func (channel *Channel) Quit(client *Client) {
- channel.stateMutex.Lock()
- channel.members.Remove(client)
- channel.stateMutex.Unlock()
- channel.regenerateMembersCache(false)
-
- client.removeChannel(channel)
- }
-
- func (channel *Channel) Kick(client *Client, target *Client, comment string) {
- if !(client.flags[Operator] || channel.hasClient(client)) {
- client.Send(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
- return
- }
- if !channel.ClientIsAtLeast(client, ChannelOperator) {
- client.Send(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
- if !channel.hasClient(target) {
- client.Send(nil, client.server.name, ERR_USERNOTINCHANNEL, client.nick, channel.name, client.t("They aren't on that channel"))
- return
- }
- if !channel.ClientHasPrivsOver(client, target) {
- client.Send(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
- return
- }
-
- kicklimit := client.server.Limits().KickLen
- if len(comment) > kicklimit {
- comment = comment[:kicklimit]
- }
-
- clientMask := client.NickMaskString()
- targetNick := target.Nick()
- for _, member := range channel.Members() {
- member.Send(nil, clientMask, "KICK", channel.name, targetNick, comment)
- }
-
- channel.Quit(target)
- }
-
- // Invite invites the given client to the channel, if the inviter can do so.
- func (channel *Channel) Invite(invitee *Client, inviter *Client) {
- if channel.flags[InviteOnly] && !channel.ClientIsAtLeast(inviter, ChannelOperator) {
- inviter.Send(nil, inviter.server.name, ERR_CHANOPRIVSNEEDED, channel.name, inviter.t("You're not a channel operator"))
- return
- }
-
- if !channel.hasClient(inviter) {
- inviter.Send(nil, inviter.server.name, ERR_NOTONCHANNEL, channel.name, inviter.t("You're not on that channel"))
- return
- }
-
- //TODO(dan): handle this more nicely, keep a list of last X invited channels on invitee rather than explicitly modifying the invite list?
- if channel.flags[InviteOnly] {
- nmc := invitee.NickCasefolded()
- channel.stateMutex.Lock()
- channel.lists[InviteMask].Add(nmc)
- channel.stateMutex.Unlock()
- }
-
- for _, member := range channel.Members() {
- if member.capabilities.Has(caps.InviteNotify) && member != inviter && member != invitee && channel.ClientIsAtLeast(member, Halfop) {
- member.Send(nil, inviter.NickMaskString(), "INVITE", invitee.Nick(), channel.name)
- }
- }
-
- //TODO(dan): should inviter.server.name here be inviter.nickMaskString ?
- inviter.Send(nil, inviter.server.name, RPL_INVITING, invitee.nick, channel.name)
- invitee.Send(nil, inviter.nickMaskString, "INVITE", invitee.nick, channel.name)
- if invitee.flags[Away] {
- inviter.Send(nil, inviter.server.name, RPL_AWAY, invitee.nick, invitee.awayMessage)
- }
- }
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