friendica-addons/jappixmini/jappix/js/avatar.js

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2012-04-17 23:12:24 +00:00
/*
Jappix - An open social platform
These are the avatar JS scripts for Jappix
-------------------------------------------------
License: AGPL
Author: Vanaryon
Last revision: 01/03/11
*/
// Requests the avatar of a given user
var AVATAR_PENDING = [];
function getAvatar(xid, mode, enabled, photo) {
/* REF: http://xmpp.org/extensions/xep-0153.html */
// No need to get the avatar, another process is yet running
if(existArrayValue(AVATAR_PENDING, xid))
return false;
// Initialize: XML data is in one SQL entry, because some browser are sloooow with SQL requests
var xml = XMLFromString(getPersistent('avatar', xid));
var forced = false;
// Retrieving forced?
if($(xml).find('forced').text() == 'true')
forced = true;
// No avatar in presence
if(!photo && !forced && (enabled == 'true')) {
// Pending marker
AVATAR_PENDING.push(xid);
// Reset the avatar
resetAvatar(xid, hex_md5(xid));
logThis('No avatar for: ' + xid, 2);
}
// Try to catch the avatar
else {
// Define some stuffs
var type = $(xml).find('type').text();
var binval = $(xml).find('binval').text();
var checksum = $(xml).find('checksum').text();
var updated = false;
// Process the checksum of the avatar
if((checksum == photo) || (photo == 'forget') || forced)
updated = true;
// If the avatar is yet stored and a new retrieving is not needed
if((mode == 'cache') && type && binval && checksum && updated) {
// Pending marker
AVATAR_PENDING.push(xid);
// Display the cache avatar
displayAvatar(xid, hex_md5(xid), type, binval);
logThis('Read avatar from cache: ' + xid, 3);
}
// Else if the request has not yet been fired, we get it
else if((!updated || (mode == 'cache' && !updated) || (mode == 'force') || (photo = 'forget')) && (enabled != 'false')) {
// Pending marker
AVATAR_PENDING.push(xid);
// Get the latest avatar
var iq = new JSJaCIQ();
iq.setType('get');
iq.setTo(xid);
iq.appendNode('vCard', {'xmlns': NS_VCARD});
con.send(iq, handleAvatar);
logThis('Get avatar from server: ' + xid, 3);
}
}
return true;
}
// Handles the avatar
function handleAvatar(iq) {
// Extract the XML values
var handleXML = iq.getNode();
var handleFrom = fullXID(getStanzaFrom(iq));
// Is this me? Remove the resource!
if(bareXID(handleFrom) == getXID())
handleFrom = bareXID(handleFrom);
// Get some other values
var hash = hex_md5(handleFrom);
var find = $(handleXML).find('vCard');
var aChecksum = 'none';
var oChecksum = null;
// Read our own checksum
if(handleFrom == getXID()) {
oChecksum = getDB('checksum', 1);
// Avoid the "null" value
if(!oChecksum)
oChecksum = '';
}
// vCard not empty?
if(find.size()) {
// We get our profile details
if(handleFrom == getXID()) {
// Get the names
var names = generateBuddyName(iq);
// Write the values to the database
setDB('profile', 'name', names[0]);
setDB('profile', 'nick', names[1]);
}
// We get the avatar
var aType = find.find('TYPE:first').text();
var aBinval = find.find('BINVAL:first').text();
// No binval?
if(!aBinval) {
aType = 'none';
aBinval = 'none';
}
// Enough data
else {
// No type?
if(!aType)
aType = 'image/png';
// Process the checksum
else
aChecksum = hex_sha1(Base64.decode(aBinval));
}
// We display the user avatar
displayAvatar(handleFrom, hash, aType, aBinval);
// Store the avatar
setPersistent('avatar', handleFrom, '<avatar><type>' + aType + '</type><binval>' + aBinval + '</binval><checksum>' + aChecksum + '</checksum><forced>false</forced></avatar>');
logThis('Avatar retrieved from server: ' + handleFrom, 3);
}
// vCard is empty
else
resetAvatar(handleFrom);
// We got a new checksum for us?
if(((oChecksum != null) && (oChecksum != aChecksum)) || !FIRST_PRESENCE_SENT) {
// Define a proper checksum
var pChecksum = aChecksum;
if(pChecksum == 'none')
pChecksum = '';
// Update our temp. checksum
setDB('checksum', 1, pChecksum);
// Send the stanza
if(FIRST_PRESENCE_SENT)
presenceSend(pChecksum);
else
getStorage(NS_OPTIONS);
}
}
// Reset the avatar of an user
function resetAvatar(xid, hash) {
// Store the empty avatar
setPersistent('avatar', xid, '<avatar><type>none</type><binval>none</binval><checksum>none</checksum><forced>false</forced></avatar>');
// Display the empty avatar
displayAvatar(xid, hash, 'none', 'none');
}
// Displays the avatar of an user
function displayAvatar(xid, hash, type, binval) {
// Initialize the vars
var container = hash + ' .avatar-container';
var code = '<img class="avatar" src="';
// If the avatar exists
if((type != 'none') && (binval != 'none'))
code += 'data:' + type + ';base64,' + binval;
else
code += './img/others/default-avatar.png';
code += '" alt="" />';
// Replace with the new avatar (in the roster and in the chat)
$('.' + container).html(code);
// We can remove the pending marker
removeArrayValue(AVATAR_PENDING, xid);
}