Added Roster IQs

Added an overly primitive "disconnect" for the client to use in the chat client example

stanza/iq_roster.go

@@ -0,0 +1,115 @@
+package stanza
+
+import (
+	"encoding/xml"
+)
+
+// ============================================================================
+// Roster
+
+const (
+	// NSRoster is the Roster IQ namespace
+	NSRoster = "jabber:iq:roster"
+	// SubscriptionNone indicates the user does not have a subscription to
+	// the contact's presence, and the contact does not have a subscription
+	// to the user's presence; this is the default value, so if the subscription
+	// attribute is not included then the state is to be understood as "none"
+	SubscriptionNone = "none"
+
+	// SubscriptionTo indicates the user has a subscription to the contact's
+	// presence, but the contact does not have a subscription to the user's presence.
+	SubscriptionTo = "to"
+
+	// SubscriptionFrom indicates the contact has a subscription to the user's
+	// presence, but the user does not have a subscription to the contact's presence
+	SubscriptionFrom = "from"
+
+	// SubscriptionBoth indicates the user and the contact have subscriptions to each
+	// other's presence (also called a "mutual subscription")
+	SubscriptionBoth = "both"
+)
+
+// ----------
+// Namespaces
+
+// Roster struct represents Roster IQs
+type Roster struct {
+	XMLName xml.Name `xml:"jabber:iq:roster query"`
+}
+
+// Namespace defines the namespace for the RosterIQ
+func (r *Roster) Namespace() string {
+	return r.XMLName.Space
+}
+
+// ---------------
+// Builder helpers
+
+// RosterIQ builds a default Roster payload
+func (iq *IQ) RosterIQ() *Roster {
+	r := Roster{
+		XMLName: xml.Name{
+			Space: NSRoster,
+			Local: "query",
+		},
+	}
+	iq.Payload = &r
+	return &r
+}
+
+// -----------
+// SubElements
+
+// RosterItems represents the list of items in a roster IQ
+type RosterItems struct {
+	XMLName xml.Name     `xml:"jabber:iq:roster query"`
+	Items   []RosterItem `xml:"item"`
+}
+
+// Namespace lets RosterItems implement the IQPayload interface
+func (r *RosterItems) Namespace() string {
+	return r.XMLName.Space
+}
+
+// RosterItem represents an item in the roster iq
+type RosterItem struct {
+	XMLName      xml.Name `xml:"jabber:iq:roster item"`
+	Jid          string   `xml:"jid,attr"`
+	Ask          string   `xml:"ask,attr,omitempty"`
+	Name         string   `xml:"name,attr,omitempty"`
+	Subscription string   `xml:"subscription,attr,omitempty"`
+	Groups       []string `xml:"group"`
+}
+
+// ---------------
+// Builder helpers
+
+// RosterItems builds a default RosterItems payload
+func (iq *IQ) RosterItems() *RosterItems {
+	ri := RosterItems{
+		XMLName: xml.Name{Space: "jabber:iq:roster", Local: "query"},
+	}
+	iq.Payload = &ri
+	return &ri
+}
+
+// AddItem builds an item and ads it to the roster IQ
+func (r *RosterItems) AddItem(jid, subscription, ask, name string, groups []string) *RosterItems {
+	item := RosterItem{
+		Jid:          jid,
+		Name:         name,
+		Groups:       groups,
+		Subscription: subscription,
+		Ask:          ask,
+	}
+	r.Items = append(r.Items, item)
+	return r
+}
+
+// ============================================================================
+// Registry init
+
+func init() {
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: NSRoster, Local: "query"}, Roster{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: NSRoster, Local: "query"}, RosterItems{})
+}