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roster.js
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roster.js
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/*
Copyright 2010, François de Metz <francois@2metz.fr>
*/
/**
* Roster Plugin
* Allow easily roster management
*
* Features
* * Get roster from server
* * handle presence
* * handle roster iq
* * subscribe/unsubscribe
* * authorize/unauthorize
* * roster versioning (xep 237)
*/
Strophe.addConnectionPlugin('roster',
{
/** Function: init
* Plugin init
*
* Parameters:
* (Strophe.Connection) conn - Strophe connection
*/
init: function(conn)
{
this._connection = conn;
this._callbacks = [];
this._callbacks_request = [];
/** Property: items
* Roster items
* [
* {
* name : "",
* jid : "",
* subscription : "",
* ask : "",
* groups : ["", ""],
* resources : {
* myresource : {
* show : "",
* status : "",
* priority : ""
* }
* }
* }
* ]
*/
items = [];
/** Property: ver
* current roster revision
* always null if server doesn't support xep 237
*/
ver = null;
// Override the connect and attach methods to always add presence and roster handlers.
// They are removed when the connection disconnects, so must be added on connection.
var oldCallback, roster = this, _connect = conn.connect, _attach = conn.attach;
var newCallback = function(status)
{
if (status == Strophe.Status.ATTACHED || status == Strophe.Status.CONNECTED)
{
try
{
// Presence subscription
conn.addHandler(roster._onReceivePresence.bind(roster), null, 'presence', null, null, null);
conn.addHandler(roster._onReceiveIQ.bind(roster), Strophe.NS.ROSTER, 'iq', "set", null, null);
}
catch (e)
{
Strophe.error(e);
}
}
if (typeof oldCallback === "function") {
oldCallback.apply(this, arguments);
}
};
conn.connect = function(jid, pass, callback, wait, hold, route)
{
oldCallback = callback;
if (typeof jid == "undefined")
jid = null;
if (typeof pass == "undefined")
pass = null;
callback = newCallback;
_connect.apply(conn, [jid, pass, callback, wait, hold, route]);
};
conn.attach = function(jid, sid, rid, callback, wait, hold, wind)
{
oldCallback = callback;
if (typeof jid == "undefined")
jid = null;
if (typeof sid == "undefined")
sid = null;
if (typeof rid == "undefined")
rid = null;
callback = newCallback;
_attach.apply(conn, [jid, sid, rid, callback, wait, hold, wind]);
};
Strophe.addNamespace('ROSTER_VER', 'urn:xmpp:features:rosterver');
Strophe.addNamespace('NICK', 'http://jabber.org/protocol/nick');
},
/** Function: supportVersioning
* return true if roster versioning is enabled on server
*/
supportVersioning: function()
{
return (this._connection.features && this._connection.features.getElementsByTagName('ver').length > 0);
},
/** Function: get
* Get Roster on server
*
* Parameters:
* (Function) userCallback - callback on roster result
* (String) ver - current rev of roster
* (only used if roster versioning is enabled)
* (Array) items - initial items of ver
* (only used if roster versioning is enabled)
* In browser context you can use sessionStorage
* to store your roster in json (JSON.stringify())
*/
get: function(userCallback, ver, items)
{
var attrs = {xmlns: Strophe.NS.ROSTER};
this.items = [];
if (this.supportVersioning())
{
// empty rev because i want an rev attribute in the result
attrs.ver = ver || '';
this.items = items || [];
}
var iq = $iq({type: 'get', 'id' : this._connection.getUniqueId('roster')}).c('query', attrs);
return this._connection.sendIQ(iq,
this._onReceiveRosterSuccess.bind(this, userCallback),
this._onReceiveRosterError.bind(this, userCallback));
},
/** Function: registerCallback
* register callback on roster (presence and iq)
*
* Parameters:
* (Function) call_back
*/
registerCallback: function(call_back)
{
this._callbacks.push(call_back);
},
registerRequestCallback: function (call_back)
{
this._callbacks_request.push(call_back);
},
/** Function: findItem
* Find item by JID
*
* Parameters:
* (String) jid
*/
findItem : function(jid)
{
for (var i = 0; i < this.items.length; i++)
{
if (this.items[i] && this.items[i].jid == jid)
{
return this.items[i];
}
}
return false;
},
/** Function: removeItem
* Remove item by JID
*
* Parameters:
* (String) jid
*/
removeItem : function(jid)
{
for (var i = 0; i < this.items.length; i++)
{
if (this.items[i] && this.items[i].jid == jid)
{
this.items.splice(i, 1);
return true;
}
}
return false;
},
/** Function: subscribe
* Subscribe presence
*
* Parameters:
* (String) jid
* (String) message (optional)
* (String) nick (optional)
*/
subscribe: function(jid, message, nick) {
var pres = $pres({to: jid, type: "subscribe"});
if (message && message !== "") {
pres.c("status").t(message).up();
}
if (nick && nick !== "") {
pres.c('nick', {'xmlns': Strophe.NS.NICK}).t(nick).up();
}
this._connection.send(pres);
},
/** Function: unsubscribe
* Unsubscribe presence
*
* Parameters:
* (String) jid
* (String) message
*/
unsubscribe: function(jid, message)
{
var pres = $pres({to: jid, type: "unsubscribe"});
if (message && message !== "")
pres.c("status").t(message);
this._connection.send(pres);
},
/** Function: authorize
* Authorize presence subscription
*
* Parameters:
* (String) jid
* (String) message
*/
authorize: function(jid, message)
{
var pres = $pres({to: jid, type: "subscribed"});
if (message && message !== "")
pres.c("status").t(message);
this._connection.send(pres);
},
/** Function: unauthorize
* Unauthorize presence subscription
*
* Parameters:
* (String) jid
* (String) message
*/
unauthorize: function(jid, message)
{
var pres = $pres({to: jid, type: "unsubscribed"});
if (message && message !== "")
pres.c("status").t(message);
this._connection.send(pres);
},
/** Function: add
* Add roster item
*
* Parameters:
* (String) jid - item jid
* (String) name - name
* (Array) groups
* (Function) call_back
*/
add: function(jid, name, groups, call_back)
{
var iq = $iq({type: 'set'}).c('query', {xmlns: Strophe.NS.ROSTER}).c('item', {jid: jid,
name: name});
for (var i = 0; i < groups.length; i++)
{
iq.c('group').t(groups[i]).up();
}
this._connection.sendIQ(iq, call_back, call_back);
},
/** Function: update
* Update roster item
*
* Parameters:
* (String) jid - item jid
* (String) name - name
* (Array) groups
* (Function) call_back
*/
update: function(jid, name, groups, call_back)
{
var item = this.findItem(jid);
if (!item)
{
throw "item not found";
}
var newName = name || item.name;
var newGroups = groups || item.groups;
var iq = $iq({type: 'set'}).c('query', {xmlns: Strophe.NS.ROSTER}).c('item', {jid: item.jid,
name: newName});
for (var i = 0; i < newGroups.length; i++)
{
iq.c('group').t(newGroups[i]).up();
}
return this._connection.sendIQ(iq, call_back, call_back);
},
/** Function: remove
* Remove roster item
*
* Parameters:
* (String) jid - item jid
* (Function) call_back
*/
remove: function(jid, call_back)
{
var item = this.findItem(jid);
if (!item)
{
throw "item not found";
}
var iq = $iq({type: 'set'}).c('query', {xmlns: Strophe.NS.ROSTER}).c('item', {jid: item.jid,
subscription: "remove"});
this._connection.sendIQ(iq, call_back, call_back);
},
/** PrivateFunction: _onReceiveRosterSuccess
*
*/
_onReceiveRosterSuccess: function(userCallback, stanza)
{
this._updateItems(stanza);
this._call_backs(this.items);
if (typeof userCallback === "function") {
userCallback(this.items);
}
},
/** PrivateFunction: _onReceiveRosterError
*
*/
_onReceiveRosterError: function(userCallback, stanza)
{
userCallback(this.items);
},
/** PrivateFunction: _onReceivePresence
* Handle presence
*/
_onReceivePresence : function(presence)
{
// TODO: from is optional
var jid = presence.getAttribute('from');
var from = Strophe.getBareJidFromJid(jid);
var item = this.findItem(from);
var type = presence.getAttribute('type');
// not in roster
if (!item)
{
// if 'friend request' presence
if (type === 'subscribe') {
this._call_backs_request(from);
}
return true;
}
if (type == 'unavailable')
{
delete item.resources[Strophe.getResourceFromJid(jid)];
}
else if (!type)
{
// TODO: add timestamp
item.resources[Strophe.getResourceFromJid(jid)] = {
show : (presence.getElementsByTagName('show').length !== 0) ? Strophe.getText(presence.getElementsByTagName('show')[0]) : "",
status : (presence.getElementsByTagName('status').length !== 0) ? Strophe.getText(presence.getElementsByTagName('status')[0]) : "",
priority : (presence.getElementsByTagName('priority').length !== 0) ? Strophe.getText(presence.getElementsByTagName('priority')[0]) : ""
};
}
else
{
// Stanza is not a presence notification. (It's probably a subscription type stanza.)
return true;
}
this._call_backs(this.items, item);
return true;
},
/** PrivateFunction: _call_backs_request
* call all the callbacks waiting for 'friend request' presences
*/
_call_backs_request : function(from)
{
for (var i = 0; i < this._callbacks_request.length; i++) // [].forEach my love ...
{
this._callbacks_request[i](from);
}
},
/** PrivateFunction: _call_backs
* first parameter is the full roster
* second is optional, newly added or updated item
* third is otional, in case of update, send the previous state of the
* update item
*/
_call_backs : function(items, item, previousItem)
{
for (var i = 0; i < this._callbacks.length; i++) // [].forEach my love ...
{
this._callbacks[i](items, item, previousItem);
}
},
/** PrivateFunction: _onReceiveIQ
* Handle roster push.
*/
_onReceiveIQ : function(iq)
{
var id = iq.getAttribute('id');
var from = iq.getAttribute('from');
// Receiving client MUST ignore stanza unless it has no from or from = user's JID.
if (from && from !== "" && from != this._connection.jid && from != Strophe.getBareJidFromJid(this._connection.jid))
return true;
var iqresult = $iq({type: 'result', id: id, from: this._connection.jid});
this._connection.send(iqresult);
this._updateItems(iq);
return true;
},
/** PrivateFunction: _updateItems
* Update items from iq
*/
_updateItems : function(iq)
{
var query = iq.getElementsByTagName('query');
if (query.length !== 0)
{
this.ver = query.item(0).getAttribute('ver');
var self = this;
Strophe.forEachChild(query.item(0), 'item',
function (item)
{
self._updateItem(item);
}
);
}
},
/** PrivateFunction: _updateItem
* Update internal representation of roster item
*/
_updateItem : function(itemTag)
{
var jid = itemTag.getAttribute("jid");
var name = itemTag.getAttribute("name");
var subscription = itemTag.getAttribute("subscription");
var ask = itemTag.getAttribute("ask");
var groups = [];
Strophe.forEachChild(itemTag, 'group',
function(group)
{
groups.push(Strophe.getText(group));
}
);
var item;
var previousItem;
if (subscription == "remove")
{
var hashBeenRemoved = this.removeItem(jid);
if (hashBeenRemoved) {
this._call_backs(
this.items,
{jid: jid, subscription: 'remove'}
);
}
return;
}
item = this.findItem(jid);
if (!item)
{
item = {
name : name,
jid : jid,
subscription : subscription,
ask : ask,
groups : groups,
resources : {}
};
this.items.push(item);
}
else
{
previousItem = {
name: item.name,
subscription: item.subscription,
ask: item.ask,
groups: item.groups
};
item.name = name;
item.subscription = subscription;
item.ask = ask;
item.groups = groups;
}
this._call_backs(this.items, item, previousItem);
}
});