Algolia autocomplete using custom source

whisper.js

$(function () {
    var el = $('#search-query-input');
    var cache = [];

    function search(query, callback) {

        /** Check if query has been already sent */
        var stored = cache[query];
        if (stored) {
            callback(JSON.parse(stored));
            return;
        }

        /** No => search for it */
        $.nette.ajax({
            'method': 'post',
            'url': el.data('link'),
            'data': {
                q: query
            },
            'success': function (payload) {
                var results = payload.places.concat(payload.clubs).concat(payload.girls);
                cache[query] = JSON.stringify(results);
                callback(results);
            }
        });
    }

    autocomplete('#' + el.attr('id'), {
        autoselect: true, // Select 1st item × search on enter UX
        autoselectOnBlur: false, // On mobile devices = true @todo
        openOnFocus: true,
        keyboardShortcuts: ['s'],
        minLength: 2
    }, [
        {
            source: search,
            displayKey: function(suggestion) {
                return suggestion.name
            },
            templates: {
                suggestion: function(suggestion) {
                    return '<img src="' + suggestion.avatar + '" alt="Avatar" width="65" height="65">' + suggestion.name;
                },
                empty: function() {
                    return '<div class="not-found"><span>¯\\(ツ)/¯ Sorry, no results found...<span></div>';
                }
            }
        }
    ]).on('autocomplete:selected', function(event, suggestion, dataset) {
        location.href = suggestion.link;
    });
});