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elgg.provide('elgg.userpicker');
/**
* Userpicker initialization
*
* The userpicker is an autocomplete library for selecting multiple users or
* friends. It works in concert with the view input/userpicker.
*
* @return void
*/
elgg.userpicker.init = function() {
// binding autocomplete.
// doing this as an each so we can pass this to functions.
$('.elgg-input-user-picker').each(function() {
$(this).autocomplete({
source: function(request, response) {
var params = elgg.userpicker.getSearchParams(this);
elgg.get('livesearch', {
data: params,
dataType: 'json',
success: function(data) {
response(data);
}
});
},
minLength: 2,
html: "html",
select: elgg.userpicker.addUser
})
});
$('.elgg-userpicker-remove').live('click', elgg.userpicker.removeUser);
};
/**
* Adds a user to the select user list
*
* elgg.userpicker.userList is defined in the input/userpicker view
*
* @param {Object} event
* @param {Object} ui The object returned by the autocomplete endpoint
* @return void
*/
elgg.userpicker.addUser = function(event, ui) {
var info = ui.item;
// do not allow users to be added multiple times
if (!(info.guid in elgg.userpicker.userList)) {
elgg.userpicker.userList[info.guid] = true;
var users = $(this).siblings('.elgg-user-picker-list');
var li = '<input type="hidden" name="members[]" value="' + info.guid + '" />';
li += elgg.userpicker.viewUser(info);
$('<li>').html(li).appendTo(users);
}
$(this).val('');
event.preventDefault();
};
/**
* Remove a user from the selected user list
*
* @param {Object} event
* @return void
*/
elgg.userpicker.removeUser = function(event) {
var item = $(this).closest('.elgg-user-picker-list > li');
var guid = item.find('[name="members[]"]').val();
delete elgg.userpicker.userList[guid];
item.remove();
event.preventDefault();
};
/**
* Render the list item for insertion into the selected user list
*
* The html in this method has to remain synced with the input/userpicker view
*
* @param {Object} info The object returned by the autocomplete endpoint
* @return string
*/
elgg.userpicker.viewUser = function(info) {
var deleteLink = "<a href='#' class='elgg-userpicker-remove'>X</a>";
var html = "<div class='elgg-image-block'>";
html += "<div class='elgg-image'>" + info.icon + "</div>";
html += "<div class='elgg-image-alt'>" + deleteLink + "</div>";
html += "<div class='elgg-body'>" + info.name + "</div>";
html += "</div";
return html;
};
/**
* Get the parameters to use for autocomplete
*
* This grabs the value of the friends checkbox.
*
* @param {Object} obj Object for the autocomplete callback
* @return Object
*/
elgg.userpicker.getSearchParams = function(obj) {
if (obj.element.siblings('[name=match_on]').attr('checked')) {
return {'match_on[]': 'friends', 'term' : obj.term};
} else {
return {'match_on[]': 'users', 'term' : obj.term};
}
};
elgg.register_hook_handler('init', 'system', elgg.userpicker.init);
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