security.js

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elgg.provide('elgg.security.token');

elgg.security.tokenRefreshFailed = false;

elgg.security.tokenRefreshTimer = null;

elgg.security.setToken = function(json) {
    //update the convenience object
    elgg.security.token = json;

    //also update all forms
    $('[name=__elgg_ts]').val(json.__elgg_ts);
    $('[name=__elgg_token]').val(json.__elgg_token);

    // also update all links that contain tokens and time stamps
    $('[href*="__elgg_ts"][href*="__elgg_token"]').each(function() {
        this.href = this.href
            .replace(/__elgg_ts=\d*/, '__elgg_ts=' + json.__elgg_ts)
            .replace(/__elgg_token=[0-9a-f]*/, '__elgg_token=' + json.__elgg_token);
    });
};

elgg.security.refreshToken = function() {
    elgg.getJSON('refresh_token', function(data) {
        if (data && data.__elgg_ts && data.__elgg_token) {
            elgg.security.setToken(data);
            if (elgg.is_logged_in() && data.logged_in === false) {
                elgg.session.user = null;
                elgg.register_error(elgg.echo('session_expired'));
            }
        }
    });
};


elgg.security.addToken = function(data) {

    // 'http://example.com?data=sofar'
    if (elgg.isString(data)) {
        // is this a full URL, relative URL, or just the query string?
        var parts = elgg.parse_url(data),
            args = {},
            base = '';

        if (parts['host'] === undefined) {
            if (data.indexOf('?') === 0) {
                // query string
                base = '?';
                args = elgg.parse_str(parts['query']);
            }
        } else {
            // full or relative URL

            if (parts['query'] !== undefined) {
                // with query string
                args = elgg.parse_str(parts['query']);
            }
            var split = data.split('?');
            base = split[0] + '?';
        }
        args["__elgg_ts"] = elgg.security.token.__elgg_ts;
        args["__elgg_token"] = elgg.security.token.__elgg_token;

        return base + jQuery.param(args);
    }

    // no input!  acts like a getter
    if (elgg.isUndefined(data)) {
        return elgg.security.token;
    }

    // {...}
    if (elgg.isPlainObject(data)) {
        return elgg.extend(data, elgg.security.token);
    }

    // oops, don't recognize that!
    throw new TypeError("elgg.security.addToken not implemented for " + (typeof data) + "s");
};

elgg.security.init = function() {
    // elgg.security.interval is set in the js/elgg PHP view.
    elgg.security.tokenRefreshTimer = setInterval(elgg.security.refreshToken, elgg.security.interval);
};

elgg.register_hook_handler('boot', 'system', elgg.security.init);