mirror of https://github.com/ergochat/ergo.git
75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
// Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
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// released under the MIT license
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package irc
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import "fmt"
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// ISupportList holds a list of ISUPPORT tokens
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type ISupportList struct {
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Tokens map[string]*string
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CachedReply [][]string
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}
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// NewISupportList returns a new ISupportList
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func NewISupportList() *ISupportList {
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var il ISupportList
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il.Tokens = make(map[string]*string)
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il.CachedReply = make([][]string, 0)
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return &il
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}
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// Add adds an RPL_ISUPPORT token to our internal list
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func (il *ISupportList) Add(name string, value string) {
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il.Tokens[name] = &value
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}
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// AddNoValue adds an RPL_ISUPPORT token that does not have a value
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func (il *ISupportList) AddNoValue(name string) {
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il.Tokens[name] = nil
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}
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// RegenerateCachedReply regenerates the cached RPL_ISUPPORT reply
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func (il *ISupportList) RegenerateCachedReply() {
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il.CachedReply = make([][]string, 0)
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maxlen := 400 // Max length of a single ISUPPORT token line
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var length int // Length of the current cache
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var cache []string // Token list cache
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for name, value := range il.Tokens {
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var token string
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if value == nil {
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token = name
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} else {
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token = fmt.Sprintf("%s=%s", name, *value)
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}
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if len(token)+length <= maxlen {
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// account for the space separating tokens
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if len(cache) > 0 {
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length++
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}
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cache = append(cache, token)
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length += len(token)
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}
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if len(cache) == 13 || len(token)+length >= maxlen {
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cache = append(cache, "are supported by this server")
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il.CachedReply = append(il.CachedReply, cache)
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cache = make([]string, 0)
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length = 0
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}
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}
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if len(cache) > 0 {
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cache = append(cache, "are supported by this server")
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il.CachedReply = append(il.CachedReply, cache)
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}
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}
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func (client *Client) RplISupport() {
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for _, tokenline := range client.server.isupport.CachedReply {
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client.Send(nil, client.server.nameString, RPL_ISUPPORT, tokenline...)
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}
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}
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