Added Roster IQs

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

_examples/xmpp_chat_client/interface.go

@@ -15,6 +15,7 @@ const (
 	rawInputWindow     = "rw"  // Where raw stanzas are written
 	contactsListWindow = "cl"  // Where the contacts list is shown, and contacts are selectable
 	menuWindow         = "mw"  // Where the menu is shown
+	disconnectMsg      = "msg"
 
 	// Menu options
 	disconnect         = "Disconnect"
@@ -188,6 +189,12 @@ func setKeyBindings(g *gocui.Gui) {
 		log.Panicln(err)
 	}
 
+	// ==========================
+	// Disconnect message
+	if err := g.SetKeybinding(disconnectMsg, gocui.KeyEnter, gocui.ModNone, delMsg); err != nil {
+		log.Panicln(err)
+	}
+
 }
 
 // General
@@ -209,7 +216,20 @@ func getLine(g *gocui.Gui, v *gocui.View) error {
 			if len(cv.ViewBufferLines()) == 0 {
 				printContactsToWindow(g, viewState.contacts)
 			}
-		} else if l == disconnect || l == askServerForRoster {
+		} else if l == disconnect {
+			maxX, maxY := g.Size()
+			msg := "You disconnected from the server. Press enter to quit."
+			if v, err := g.SetView(disconnectMsg, maxX/2-30, maxY/2, maxX/2-29+len(msg), maxY/2+2, 0); err != nil {
+				if !gocui.IsUnknownView(err) {
+					return err
+				}
+				fmt.Fprintln(v, msg)
+				if _, err := g.SetCurrentView(disconnectMsg); err != nil {
+					return err
+				}
+			}
+			killChan <- disconnectErr
+		} else if l == askServerForRoster {
 			chlw, _ := g.View(chatLogWindow)
 			fmt.Fprintln(chlw, infoFormat+" Not yet implemented !")
 		} else if l == rawMode {
@@ -326,3 +346,11 @@ func cursorUp(g *gocui.Gui, v *gocui.View) error {
 	}
 	return nil
 }
+
+func delMsg(g *gocui.Gui, v *gocui.View) error {
+	if err := g.DeleteView(disconnectMsg); err != nil {
+		return err
+	}
+	errChan <- gocui.ErrQuit // Quit the program
+	return nil
+}

_examples/xmpp_chat_client/xmpp_chat_client.go

@@ -6,6 +6,7 @@ xmpp_chat_client is a demo client that connect on an XMPP server to chat with ot
 
 import (
 	"encoding/xml"
+	"errors"
 	"flag"
 	"fmt"
 	"github.com/awesome-gocui/gocui"
@@ -40,10 +41,11 @@ var (
 	CorrespChan = make(chan string, 1)
 	textChan    = make(chan string, 5)
 	rawTextChan = make(chan string, 5)
-	killChan    = make(chan struct{}, 1)
+	killChan    = make(chan error, 1)
 	errChan     = make(chan error)
 
 	logger        *log.Logger
+	disconnectErr = errors.New("disconnecting client")
 )
 
 type config struct {
@@ -160,7 +162,7 @@ func startClient(g *gocui.Gui, config *config) {
 
 	router.HandleFunc("message", handlerWithGui)
 	if client, err = xmpp.NewClient(clientCfg, router, errorHandler); err != nil {
-		panic(fmt.Sprintf("Could not create a new client ! %s", err))
+		log.Panicln(fmt.Sprintf("Could not create a new client ! %s", err))
 
 	}
 
@@ -196,7 +198,13 @@ func startMessaging(client xmpp.Sender, config *config) {
 	var correspondent string
 	for {
 		select {
-		case <-killChan:
+		case err := <-killChan:
+			if err == disconnectErr {
+				sc := client.(xmpp.StreamClient)
+				sc.Disconnect()
+			} else {
+				logger.Println(err)
+			}
 			return
 		case text = <-textChan:
 			reply := stanza.Message{Attrs: stanza.Attrs{To: correspondent, From: config.Client[clientJid], Type: stanza.MessageTypeChat}, Body: text}
@@ -265,8 +273,7 @@ func readConfig() *config {
 
 // If an error occurs, this is used to kill the client
 func errorHandler(err error) {
-	fmt.Printf("%v", err)
+	killChan <- err
-	killChan <- struct{}{}
 }
 
 // Read the client roster from the config. This does not check with the server that the roster is correct.

client.go

@@ -206,7 +206,12 @@ func (c *Client) Resume(state SMState) error {
 }
 
 func (c *Client) Disconnect() {
-	// TODO: Add a way to wait for stream close acknowledgement from the server for clean disconnect
+	// TODO : Wait for server response for clean disconnect
+	presence := stanza.NewPresence(stanza.Attrs{From: c.config.Jid})
+	presence.Type = stanza.PresenceTypeUnavailable
+	c.Send(presence)
+	c.SendRaw(stanza.StreamClose)
+
 	if c.transport != nil {
 		_ = c.transport.Close()
 	}

component.go

@@ -111,7 +111,6 @@ func (c *Component) Resume(sm SMState) error {
 		c.updateState(StatePermanentError)
 		return NewConnError(errors.New("expecting handshake result, got "+v.Name()), true)
 	}
-	return err
 }
 
 func (c *Component) Disconnect() {

stanza/iq_disco.go

@@ -8,6 +8,7 @@ import (
 // Disco Info
 
 const (
+	// NSDiscoInfo defines the namespace for disco IQ stanzas
 	NSDiscoInfo = "http://jabber.org/protocol/disco#info"
 )
 
@@ -21,6 +22,7 @@ type DiscoInfo struct {
 	Features []Feature  `xml:"feature"`
 }
 
+// Namespace lets DiscoInfo implement the IQPayload interface
 func (d *DiscoInfo) Namespace() string {
 	return d.XMLName.Space
 }
@@ -112,7 +114,7 @@ func (d *DiscoItems) Namespace() string {
 // DiscoItems builds a default DiscoItems payload
 func (iq *IQ) DiscoItems() *DiscoItems {
 	d := DiscoItems{
-		XMLName: xml.Name{Space: "http://jabber.org/protocol/disco#items", Local: "query"},
+		XMLName: xml.Name{Space: NSDiscoItems, Local: "query"},
 	}
 	iq.Payload = &d
 	return &d

stanza/iq_disco_test.go

@@ -50,7 +50,7 @@ func TestDiscoInfo_Builder(t *testing.T) {
 // Implements XEP-0030 example 17
 // https://xmpp.org/extensions/xep-0030.html#example-17
 func TestDiscoItems_Builder(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: "result", From: "catalog.shakespeare.lit",
+	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: "catalog.shakespeare.lit",
 		To: "romeo@montague.net/orchard", Id: "items-2"})
 	iq.DiscoItems().
 		AddItem("catalog.shakespeare.lit", "books", "Books by and about Shakespeare").

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{})
+}

stanza/iq_roster_test.go

@@ -0,0 +1,109 @@
+package stanza
+
+import (
+	"encoding/xml"
+	"reflect"
+	"testing"
+)
+
+func TestRosterBuilder(t *testing.T) {
+	iq := NewIQ(Attrs{Type: IQTypeResult, From: "romeo@montague.net/orchard"})
+	var noGroup []string
+
+	iq.RosterItems().AddItem("xl8ceawrfu8zdneomw1h6h28d@crypho.com",
+		SubscriptionBoth,
+		"",
+		"xl8ceaw",
+		[]string{"0flucpm8i2jtrjhxw01uf1nd2",
+			"bm2bajg9ex4e1swiuju9i9nu5",
+			"rvjpanomi4ejpx42fpmffoac0"}).
+		AddItem("9aynsym60zbu78jbdvpho7s68@crypho.com",
+			SubscriptionBoth,
+			"",
+			"9aynsym60",
+			[]string{"mzaoy73i6ra5k502182zi1t97"}).
+		AddItem("admin@crypho.com",
+			SubscriptionBoth,
+			"",
+			"admin",
+			noGroup)
+
+	parsedIQ, err := checkMarshalling(t, iq)
+	if err != nil {
+		return
+	}
+
+	// Check result
+	pp, ok := parsedIQ.Payload.(*RosterItems)
+	if !ok {
+		t.Errorf("Parsed stanza does not contain correct IQ payload")
+	}
+
+	// Check items
+	items := []RosterItem{
+		{
+			XMLName:      xml.Name{},
+			Name:         "xl8ceaw",
+			Ask:          "",
+			Jid:          "xl8ceawrfu8zdneomw1h6h28d@crypho.com",
+			Subscription: SubscriptionBoth,
+			Groups: []string{"0flucpm8i2jtrjhxw01uf1nd2",
+				"bm2bajg9ex4e1swiuju9i9nu5",
+				"rvjpanomi4ejpx42fpmffoac0"},
+		},
+		{
+			XMLName:      xml.Name{},
+			Name:         "9aynsym60",
+			Ask:          "",
+			Jid:          "9aynsym60zbu78jbdvpho7s68@crypho.com",
+			Subscription: SubscriptionBoth,
+			Groups:       []string{"mzaoy73i6ra5k502182zi1t97"},
+		},
+		{
+			XMLName:      xml.Name{},
+			Name:         "admin",
+			Ask:          "",
+			Jid:          "admin@crypho.com",
+			Subscription: SubscriptionBoth,
+			Groups:       noGroup,
+		},
+	}
+	if len(pp.Items) != len(items) {
+		t.Errorf("Items length mismatch: %#v", pp.Items)
+	} else {
+		for i, item := range pp.Items {
+			if item.Jid != items[i].Jid {
+				t.Errorf("JID Mismatch (expected: %s): %s", items[i].Jid, item.Jid)
+			}
+			if !reflect.DeepEqual(item.Groups, items[i].Groups) {
+				t.Errorf("Node Mismatch (expected: %s): %s", items[i].Jid, item.Jid)
+			}
+			if item.Name != items[i].Name {
+				t.Errorf("Name Mismatch (expected: %s): %s", items[i].Jid, item.Jid)
+			}
+			if item.Ask != items[i].Ask {
+				t.Errorf("Name Mismatch (expected: %s): %s", items[i].Jid, item.Jid)
+			}
+			if item.Subscription != items[i].Subscription {
+				t.Errorf("Name Mismatch (expected: %s): %s", items[i].Jid, item.Jid)
+			}
+		}
+	}
+}
+
+func checkMarshalling(t *testing.T, iq IQ) (*IQ, error) {
+	// Marshall
+	data, err := xml.Marshal(iq)
+	if err != nil {
+		t.Errorf("cannot marshal iq: %s\n%#v", err, iq)
+		return nil, err
+	}
+
+	// Unmarshall
+	var parsedIQ IQ
+	err = xml.Unmarshal(data, &parsedIQ)
+	if err != nil {
+		t.Errorf("Unmarshal returned error: %s\n%s", err, data)
+	}
+	return &parsedIQ, err
+}

stanza/stream.go

@@ -12,3 +12,5 @@ type Stream struct {
 	Id      string   `xml:"id,attr"`
 	Version string   `xml:"version,attr"`
 }
+
+const StreamClose = "</stream:stream>"