149 lines
3.1 KiB
Go
149 lines
3.1 KiB
Go
package xmpp
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import (
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"encoding/xml"
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"strconv"
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"time"
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)
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// ============================================================================
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// MUC Presence extension
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// MucPresence implements XEP-0045: Multi-User Chat - 19.1
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type MucPresence struct {
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PresExtension
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XMLName xml.Name `xml:"http://jabber.org/protocol/muc x"`
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Password string `xml:"password,omitempty"`
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History History `xml:"history,omitempty"`
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}
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const timeLayout = "2006-01-02T15:04:05Z"
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// History implements XEP-0045: Multi-User Chat - 19.1
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type History struct {
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XMLName xml.Name
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MaxChars NullableInt `xml:"maxchars,attr,omitempty"`
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MaxStanzas NullableInt `xml:"maxstanzas,attr,omitempty"`
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Seconds NullableInt `xml:"seconds,attr,omitempty"`
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Since time.Time `xml:"since,attr,omitempty"`
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}
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type NullableInt struct {
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Value int
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isSet bool
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}
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func NewNullableInt(val int) NullableInt {
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return NullableInt{val, true}
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}
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func (n NullableInt) Get() (v int, ok bool) {
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return n.Value, n.isSet
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}
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// UnmarshalXML implements custom parsing for history element
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func (h *History) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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h.XMLName = start.Name
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// Extract attributes
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for _, attr := range start.Attr {
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switch attr.Name.Local {
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case "maxchars":
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v, err := strconv.Atoi(attr.Value)
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if err != nil {
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return err
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}
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h.MaxChars = NewNullableInt(v)
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case "maxstanzas":
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v, err := strconv.Atoi(attr.Value)
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if err != nil {
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return err
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}
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h.MaxStanzas = NewNullableInt(v)
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case "seconds":
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v, err := strconv.Atoi(attr.Value)
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if err != nil {
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return err
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}
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h.Seconds = NewNullableInt(v)
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case "since":
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t, err := time.Parse(timeLayout, attr.Value)
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if err != nil {
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return err
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}
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h.Since = t
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}
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}
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// Consume remaining data until element end
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for {
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t, err := d.Token()
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if err != nil {
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return err
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}
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switch tt := t.(type) {
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case xml.EndElement:
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if tt == start.End() {
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return nil
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}
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}
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}
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}
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func (h History) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error) {
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mc, isMcSet := h.MaxChars.Get()
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ms, isMsSet := h.MaxStanzas.Get()
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s, isSSet := h.Seconds.Get()
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// We do not have any value, ignore history element
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if h.Since.IsZero() && !isMcSet && !isMsSet && !isSSet {
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return nil
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}
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// Encode start element and attributes
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start.Name = xml.Name{Local: "history"}
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if isMcSet {
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attr := xml.Attr{
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Name: xml.Name{Local: "maxchars"},
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Value: strconv.Itoa(mc),
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}
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start.Attr = append(start.Attr, attr)
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}
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if isMsSet {
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attr := xml.Attr{
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Name: xml.Name{Local: "maxstanzas"},
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Value: strconv.Itoa(ms),
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}
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start.Attr = append(start.Attr, attr)
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}
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if isSSet {
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attr := xml.Attr{
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Name: xml.Name{Local: "seconds"},
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Value: strconv.Itoa(s),
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}
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start.Attr = append(start.Attr, attr)
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}
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if !h.Since.IsZero() {
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attr := xml.Attr{
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Name: xml.Name{Local: "since"},
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Value: h.Since.Format(timeLayout),
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}
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start.Attr = append(start.Attr, attr)
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}
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if err := e.EncodeToken(start); err != nil {
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return err
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}
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return e.EncodeToken(xml.EndElement{Name: start.Name})
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}
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func init() {
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TypeRegistry.MapExtension(PKTPresence, xml.Name{"http://jabber.org/protocol/muc", "x"}, MucPresence{})
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}
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