Grafana auto login

extra.js

$( document ).ready(function() {

    /**
     * Cookies management library
     * 
     * @type type
     */
    var helperCookie = {
        findAll: function () {
            var cookies = {};
            _(document.cookie.split(';'))
                    .chain()
                    .map(function (m) {
                        return m.replace(/^\s+/, '').replace(/\s+$/, '');
                    })
                    .each(function (c) {
                        var arr = c.split('='),
                                key = arr[0],
                                value = null;
                        var size = _.size(arr);
                        if (size > 1) {
                            value = arr.slice(1).join('');
                        }
                        cookies[key] = value;
                    });
            return cookies;
        },
        find: function (name) {
            var cookie = null,
                    list = this.findAll();

            _.each(list, function (value, key) {
                if (key === name)
                    cookie = value;
            });
            return cookie;
        },
        create: function (name, value, time) {
            var today = new Date(),
                    offset = (typeof time == 'undefined') ? (1000 * 60 * 60 * 24) : (time * 1000),
                    expires_at = new Date(today.getTime() + offset);

            var cookie = _.map({
                name: escape(value),
                expires: expires_at.toGMTString(),
                path: '/'
            }, function (value, key) {
                return [(key == 'name') ? name : key, value].join('=');
            }).join(';');

            document.cookie = cookie;
            return this;
        },
        destroy: function (name, cookie) {
            if (cookie = this.find(name)) {
                this.create(name, null, -1000000);
            }
            return this;
        }
    };
    
    /**
     * Helper functions
     */
    var helper = function () {

        /**
         * Get a parameter from query string URL
         * 
         * @param {type} sParam
         * @returns {grafana_script_L1.helper.getUrlParameter.sParameterName|Boolean}
         */
        this.getUrlParameter = function (sParam) {
            var sPageURL = decodeURIComponent(window.location.search.substring(1)),
                    sURLVariables = sPageURL.split('&'),
                    sParameterName,
                    i;

            for (i = 0; i < sURLVariables.length; i++) {
                sParameterName = sURLVariables[i].split('=');

                if (sParameterName[0] === sParam) {
                    return sParameterName[1] === undefined ? true : sParameterName[1];
                }
            }
        }

        /**
         * From PHP JS
         * 
         * @param {type} str
         * @returns {unresolved}
         */
        this.url_decode = function (str) {
            return decodeURIComponent((str + '')
                    .replace(/%(?![\da-f]{2})/gi, function () {
                        // PHP tolerates poorly formed escape sequences
                        return '%25';
                    })
                    .replace(/\+/g, '%20'));

        };

        /**
         * From PHPJS
         * 
         * @param {type} data
         * @returns {String}
         */
        this.base64_decode = function (data) {
            var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
            var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
                    ac = 0,
                    dec = '',
                    tmp_arr = [];

            if (!data) {
                return data;
            }

            data += '';
            do {
                h1 = b64.indexOf(data.charAt(i++));
                h2 = b64.indexOf(data.charAt(i++));
                h3 = b64.indexOf(data.charAt(i++));
                h4 = b64.indexOf(data.charAt(i++));

                bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

                o1 = bits >> 16 & 0xff;
                o2 = bits >> 8 & 0xff;
                o3 = bits & 0xff;

                if (h3 == 64) {
                    tmp_arr[ac++] = String.fromCharCode(o1);
                } else if (h4 == 64) {
                    tmp_arr[ac++] = String.fromCharCode(o1, o2);
                } else {
                    tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
                }
            } while (i < data.length);

            dec = tmp_arr.join('');

            return dec.replace(/\0+$/, '');
        }
    };

    var oHelper = new helper(),
            t = oHelper.getUrlParameter('t');

    if (typeof (t) == 'undefined') {
        return false;
    }

    if (t.length == 0) {
        return false;
    }

    try {
        var t_decoded = oHelper.base64_decode(oHelper.url_decode(t)),
                ojson = $.parseJSON(t_decoded);

        if (typeof (ojson.user) == 'undefined' || typeof (ojson.pass) == 'undefined') {
            throw "Undefined type";
        }

        if (ojson.user.lenght == 0 || ojson.pass.lenght == 0) {
            throw "User or password empty";
        }

    } catch (e) {
        return false;
    }
    
    if (typeof (ojson.redirect_to) != 'undefined') {
        helperCookie.create("redirect_to", ojson.redirect_to);
    }

     $('body').css('backgroundColor', '#FFF').hide();
    
    setTimeout(function () {
        var $form = $("form.login-form");
        if ($form.length > 0) {
            $form.find("input[name=username]").val(ojson.user).trigger("input");
            $form.find("input[name=password]").val(ojson.pass).trigger("input");
            $form.find("button[type=submit]").trigger('click');
        }
    }, 500);
});