105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
// written by Daniel Oaks <daniel@danieloaks.net>
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// released under the ISC license
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package gircclient
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import (
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"sort"
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"strings"
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)
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// ClientCapabilities holds the capabilities that can and have been enabled on
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// a ServerConnection.
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type ClientCapabilities struct {
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Available map[string]*string
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Enabled map[string]bool
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Wanted []string
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}
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// NewClientCapabilities returns a newly-initialised ClientCapabilities.
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func NewClientCapabilities() ClientCapabilities {
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var cc ClientCapabilities
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cc.Available = make(map[string]*string, 0)
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cc.Enabled = make(map[string]bool, 0)
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cc.Wanted = make([]string, 0)
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return cc
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}
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// AddWantedCaps adds the given capabilities to our list of capabilities that
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// we want from the server.
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func (cc *ClientCapabilities) AddWantedCaps(caps ...string) {
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for _, name := range caps {
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// I'm not sure how fast this is, but speed isn't too much of a concern
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// here. Adding 'wanted capabilities' is something that generally only
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// happens at startup anyway.
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i := sort.Search(len(cc.Wanted), func(i int) bool { return cc.Wanted[i] >= name })
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if i >= len(cc.Wanted) || cc.Wanted[i] != name {
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cc.Wanted = append(cc.Wanted, name)
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sort.Strings(cc.Wanted)
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}
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}
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}
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// AddCaps adds capabilities from LS lists to our Available map.
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func (cc *ClientCapabilities) AddCaps(tags ...string) {
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var name string
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var value *string
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for _, tag := range tags {
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if len(tag) == 0 {
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continue
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}
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if strings.Contains(tag, "=") {
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vals := strings.SplitN(tag, "=", 2)
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name = vals[0]
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value = &vals[1]
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} else {
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name = tag
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value = nil
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}
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cc.Available[name] = value
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}
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}
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// EnableCaps enables the given capabilities.
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func (cc *ClientCapabilities) EnableCaps(caps ...string) {
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for _, name := range caps {
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if strings.HasPrefix(name, "-") {
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name = strings.TrimPrefix(name, "-")
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delete(cc.Enabled, name)
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} else {
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cc.Enabled[name] = true
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}
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}
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}
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// DelCaps removes the given capabilities.
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func (cc *ClientCapabilities) DelCaps(caps ...string) {
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for _, name := range caps {
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delete(cc.Available, name)
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delete(cc.Enabled, name)
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}
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}
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// ToRequestLine returns a line of capabilities to request, to be used in a
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// CAP REQ line.
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func (cc *ClientCapabilities) ToRequestLine() string {
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var caps []string
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caps = make([]string, 0)
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for _, name := range cc.Wanted {
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_, capIsAvailable := cc.Available[name]
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_, capIsEnabled := cc.Enabled[name]
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if capIsAvailable && !capIsEnabled {
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caps = append(caps, name)
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}
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}
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return strings.Join(caps, " ")
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}
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