cryptpad/www/common/toolbar.js

define([
    'jquery',
    '/customize/application_config.js',
    '/api/config'
], function ($, Config, ApiConfig) {

    var Messages = {};

    var Bar = {
        constants: {},
    };

    /** Id of the div containing the user list. */
    var USER_LIST_CLS = Bar.constants.userlist = 'cryptpad-user-list';

    /** Id of the div containing the lag info. */
    var LAG_ELEM_CLS = Bar.constants.lag = 'cryptpad-lag';

    /** The toolbar class which contains the user list, debug link and lag. */
    var TOOLBAR_CLS = Bar.constants.toolbar = 'cryptpad-toolbar';

    var TOP_CLS = Bar.constants.top = 'cryptpad-toolbar-top';
    var LEFTSIDE_CLS = Bar.constants.leftside = 'cryptpad-toolbar-leftside';
    var RIGHTSIDE_CLS = Bar.constants.rightside = 'cryptpad-toolbar-rightside';
    var HISTORY_CLS = Bar.constants.history = 'cryptpad-toolbar-history';

    var SPINNER_CLS = Bar.constants.spinner = 'cryptpad-spinner';

    var STATE_CLS = Bar.constants.state = 'cryptpad-state';

    var USERNAME_CLS = Bar.constants.username = 'cryptpad-toolbar-username';

    var READONLY_CLS = Bar.constants.readonly = 'cryptpad-readonly';

    var USERBUTTONS_CONTAINER_CLS = Bar.constants.userButtonsContainer = "cryptpad-userbuttons-container";
    var USERLIST_CLS = Bar.constants.userlist = "cryptpad-dropdown-users";
    var EDITSHARE_CLS = Bar.constants.editShare = "cryptpad-dropdown-editShare";
    var VIEWSHARE_CLS = Bar.constants.viewShare = "cryptpad-dropdown-viewShare";
    var SHARE_CLS = Bar.constants.viewShare = "cryptpad-dropdown-share";
    var DROPDOWN_CONTAINER_CLS = Bar.constants.dropdownContainer = "cryptpad-dropdown-container";
    var DROPDOWN_CLS = Bar.constants.dropdown = "cryptpad-dropdown";
    var TITLE_CLS = Bar.constants.title = "cryptpad-title";
    var USER_CLS = Bar.constants.userAdmin = "cryptpad-user";
    var USERBUTTON_CLS = Bar.constants.changeUsername = "cryptpad-change-username";

    var SPINNER_DISAPPEAR_TIME = 3000;

    var uid = function () {
        return 'cryptpad-uid-' + String(Math.random()).substring(2);
    };

    var $style;

    var connected = false;
    var firstConnection = true;
    var lagErrors = 0;

    var styleToolbar = function ($container, href, version) {
        href = href || '/customize/toolbar.css' + (version?('?' + version): '');

        $.ajax({
            url: href,
            dataType: 'text',
            success: function (data) {
                $container.append($('<style>').text(data));
            },
        });
    };

    var createRealtimeToolbar = function ($container, config) {
        var $toolbar = $('<div>', {
            'class': TOOLBAR_CLS,
            id: uid(),
        })
        .append($('<div>', {'class': TOP_CLS}))
        .append($('<div>', {'class': LEFTSIDE_CLS}))
        .append($('<div>', {'class': RIGHTSIDE_CLS}))
        .append($('<div>', {'class': HISTORY_CLS}));

        // The 'notitle' class removes the line added for the title with a small screen
        if (!config || typeof config !== "object") {
            $toolbar.addClass('notitle');
        }

        $container.prepend($toolbar);

        if (ApiConfig && ApiConfig.requireConf && ApiConfig.requireConf.urlArgs) {
            styleToolbar($container, undefined, ApiConfig.requireConf.urlArgs);
        } else {
            styleToolbar($container);
        }
        return $toolbar;
    };

    var createSpinner = function ($container, config) {
        if (config.displayed.indexOf('spinner') !== -1) {
            var $spin = $('<span>');
            var $spinner = $('<span>', {
                id: uid(),
                'class': SPINNER_CLS + ' spin fa fa-spinner fa-pulse',
            }).appendTo($spin).hide();
            $('<span>', {
                id: uid(),
                'class': SPINNER_CLS + ' synced fa fa-check',
                title: Messages.synced
            }).appendTo($spin);
            $container.prepend($spin);
            return $spin[0];
        }
    };

    var kickSpinner = function (Cryptpad, realtime, local, spinnerElement) {
        if (!spinnerElement) { return; }
        $(spinnerElement).find('.spin').show();
        $(spinnerElement).find('.synced').hide();
        var onSynced = function () {
            if (spinnerElement.timeout) { clearTimeout(spinnerElement.timeout); }
            spinnerElement.timeout = setTimeout(function () {
                $(spinnerElement).find('.spin').hide();
                $(spinnerElement).find('.synced').show();
            }, local ? 0 : SPINNER_DISAPPEAR_TIME);
        };
        if (Cryptpad) {
            Cryptpad.whenRealtimeSyncs(realtime, onSynced);
            return;
        }
        onSynced();
    };

    var createUserButtons = function ($userlistElement, config, readOnly, Cryptpad) {
        // User list button
        if (config.displayed.indexOf('userlist') !== -1) {
            if (!config.userData) {
                throw new Error("You must provide a `userData` object to display the userlist");
            }
            var dropdownConfig = {
                options: [{
                    tag: 'p',
                    attributes: {'class': USERLIST_CLS},
                }] // Entries displayed in the menu
            };
            var $block = Cryptpad.createDropdown(dropdownConfig);
            $block.attr('id', 'userButtons');
            $userlistElement.append($block);
        }

        // Share button
        if (config.displayed.indexOf('share') !== -1) {
            var secret = Cryptpad.find(config, ['share', 'secret']);
            var channel = Cryptpad.find(config, ['share', 'channel']);
            if (!secret || !channel) {
                throw new Error("Unable to display the share button: share.secret and share.channel required");
            }
            Cryptpad.getRecentPads(function (err, recent) {
                var $shareIcon = $('<span>', {'class': 'fa fa-share-alt'});
                var $span = $('<span>', {'class': 'large'}).append(' ' +Messages.shareButton);
                var hashes = Cryptpad.getHashes(channel, secret);
                var options = [];

                // If we have a stronger version in drive, add it and add a redirect button
                var stronger = recent && Cryptpad.findStronger(null, recent);
                if (stronger) {
                    var parsed = Cryptpad.parsePadUrl(stronger);
                    hashes.editHash = parsed.hash;
                }

                if (hashes.editHash) {
                    options.push({
                        tag: 'a',
                        attributes: {title: Messages.editShareTitle, 'class': 'editShare'},
                        content: '<span class="fa fa-users"></span> ' + Messages.editShare
                    });
                    if (stronger) {
                        // We're in view mode, display the "open editing link" button
                        options.push({
                            tag: 'a',
                            attributes: {
                                title: Messages.editOpenTitle,
                                'class': 'editOpen',
                                href: window.location.pathname + '#' + hashes.editHash,
                                target: '_blank'
                            },
                            content: '<span class="fa fa-users"></span> ' + Messages.editOpen
                        });
                    }
                    options.push({tag: 'hr'});
                }
                if (hashes.viewHash) {
                    options.push({
                        tag: 'a',
                        attributes: {title: Messages.viewShareTitle, 'class': 'viewShare'},
                        content: '<span class="fa fa-eye"></span> ' + Messages.viewShare
                    });
                    if (hashes.editHash && !stronger) {
                        // We're in edit mode, display the "open readonly" button
                        options.push({
                            tag: 'a',
                            attributes: {
                                title: Messages.viewOpenTitle,
                                'class': 'viewOpen',
                                href: window.location.pathname + '#' + hashes.viewHash,
                                target: '_blank'
                            },
                            content: '<span class="fa fa-eye"></span> ' + Messages.viewOpen
                        });
                    }
                }
                var dropdownConfigShare = {
                    text: $('<div>').append($shareIcon).append($span).html(),
                    options: options
                };
                var $shareBlock = Cryptpad.createDropdown(dropdownConfigShare);
                $shareBlock.find('button').attr('id', 'shareButton');
                $shareBlock.find('.dropdown-bar-content').addClass(SHARE_CLS).addClass(EDITSHARE_CLS).addClass(VIEWSHARE_CLS);
                $userlistElement.append($shareBlock);

                if (hashes.editHash) {
                    $shareBlock.find('a.editShare').click(function () {
                        var url = window.location.origin + window.location.pathname + '#' + hashes.editHash;
                        var success = Cryptpad.Clipboard.copy(url);
                        if (success) { Cryptpad.log(Messages.shareSuccess); }
                    });
                }
                if (hashes.viewHash) {
                    $shareBlock.find('a.viewShare').click(function () {
                        var url = window.location.origin + window.location.pathname + '#' + hashes.viewHash;
                        var success = Cryptpad.Clipboard.copy(url);
                        if (success) { Cryptpad.log(Messages.shareSuccess); }
                    });
                }
            });
        }
    };

    var createUserList = function ($container, config, readOnly, Cryptpad) {
        if (config.displayed.indexOf('userlist') === -1 && config.displayed.indexOf('share') === -1) { return; }
        var $userlist = $('<div>', {
            'class': USER_LIST_CLS,
            id: uid(),
        });
        createUserButtons($userlist, config, readOnly, Cryptpad);
        $container.append($userlist);
        return $userlist[0];
    };

    var getOtherUsers = function(myUserName, userList, userData) {
        var i = 0; // duplicates counter
        var list = [];
        var myUid = userData[myUserName] ? userData[myUserName].uid : undefined;
        var uids = [];
        userList.forEach(function(user) {
            if(user !== myUserName) {
                var data = (userData) ? (userData[user] || null) : null;
                var userName = (data) ? data.name : null;
                var userId = (data) ? data.uid : null;
                if (userName && uids.indexOf(userId) === -1 && (!myUid || userId !== myUid)) {
                    uids.push(userId);
                    list.push(userName);
                } else { i++; }
            }
        });
        return {
            list: list,
            duplicates: i
        };
    };

    var arrayIntersect = function(a, b) {
        return $.grep(a, function(i) {
            return $.inArray(i, b) > -1;
        });
    };

    var getViewers = function (n) {
        if (!n || !parseInt(n) || n === 0) { return ''; }
        if (n === 1) { return '; + ' + Messages.oneViewer; }
        return '; + ' + Messages._getKey('viewers', [n]);
    };

    var checkSynchronizing = function (userList, myUserName, $stateElement) {
        var meIdx = userList.indexOf(myUserName);
        if (meIdx === -1) {
            $stateElement.text(Messages.synchronizing);
            return;
        }
        $stateElement.text('');
    };

    var updateUserList = function (config, myUserName, userlistElement, userList, userData, readOnly, $userAdminElement) {
        // Make sure the elements are displayed
        var $userButtons = $(userlistElement).find("#userButtons");
        $userButtons.attr('display', 'inline');

        if (config.displayed.indexOf('userlist') !== -1) {
            var numberOfUsers = userList.length;

            // If we are using old pads (readonly unavailable), only editing users are in userList.
            // With new pads, we also have readonly users in userList, so we have to intersect with
            // the userData to have only the editing users. We can't use userData directly since it
            // may contain data about users that have already left the channel.
            userList = readOnly === -1 ? userList : arrayIntersect(userList, Object.keys(userData));

            // Names of editing users
            var others = getOtherUsers(myUserName, userList, userData);
            var editUsersNames = others.list;
            var duplicates = others.duplicates;

            var numberOfEditUsers = userList.length - duplicates;
            var numberOfViewUsers = numberOfUsers - numberOfEditUsers - duplicates;

            // Number of anonymous editing users
            var anonymous = numberOfEditUsers - editUsersNames.length;

            // Update the userlist
            var $usersTitle = $('<h2>').text(Messages.users);
            var $editUsers = $userButtons.find('.' + USERLIST_CLS);
            $editUsers.html('').append($usersTitle);

            var $editUsersList = $('<pre>');
            if (readOnly !== 1) { // Yourself - edit
                $editUsers.append('<span class="yourself">' + Messages.yourself + '</span>');
                anonymous--;
            }
            // Editors
            $editUsersList.text(editUsersNames.join('\n')); // .text() to avoid XSS
            $editUsers.append($editUsersList);
            if (anonymous > 0) { // Anonymous editors
                var text = anonymous === 1 ? Messages.anonymousUser : Messages.anonymousUsers;
                $editUsers.append('<span class="anonymous">' + anonymous + ' ' + text + '</span>');
            }
            if (numberOfViewUsers > 0) { // Viewers
                var viewText = '<span class="viewer">';
                if (numberOfEditUsers > 0) {
                    $editUsers.append('<br>');
                    viewText += Messages.and + ' ';
                }
                var viewerText = numberOfViewUsers !== 1 ? Messages.viewers : Messages.viewer;
                viewText += numberOfViewUsers + ' ' + viewerText + '</span>';
                $editUsers.append(viewText);
            }


            // Update the buttons
            var fa_editusers = '<span class="fa fa-users"></span>';
            var fa_viewusers = '<span class="fa fa-eye"></span>';
            var viewersText = numberOfViewUsers !== 1 ? Messages.viewers : Messages.viewer;
            var editorsText = numberOfEditUsers !== 1 ? Messages.editors : Messages.editor;
            var $span = $('<span>', {'class': 'large'}).html(fa_editusers + ' ' + numberOfEditUsers + ' ' + editorsText + '&nbsp;&nbsp; ' + fa_viewusers + ' ' + numberOfViewUsers + ' ' + viewersText);
            var $spansmall = $('<span>', {'class': 'narrow'}).html(fa_editusers + ' ' + numberOfEditUsers + '&nbsp;&nbsp; ' + fa_viewusers + ' ' + numberOfViewUsers);
            $userButtons.find('.buttonTitle').html('').append($span).append($spansmall);
        }

        if (config.displayed.indexOf('useradmin') !== -1) {
            // Change username in useradmin dropdown
            var $userElement = $userAdminElement.find('.' + USERNAME_CLS);
            $userElement.show();
            if (readOnly === 1) {
                $userElement.addClass(READONLY_CLS).text(Messages.readonly);
            }
            else {
                var name = userData[myUserName] && userData[myUserName].name;
                if (!name) {
                    name = Messages.anonymous;
                }
                $userElement.removeClass(READONLY_CLS).text(name);
            }
        }
    };

    var createLagElement = function () {
        var $lag = $('<span>', {
            'class': LAG_ELEM_CLS,
            id: uid(),
        });
        var $a = $('<span>', {id: 'newLag'});
        $('<span>', {'class': 'bar1'}).appendTo($a);
        $('<span>', {'class': 'bar2'}).appendTo($a);
        $('<span>', {'class': 'bar3'}).appendTo($a);
        $('<span>', {'class': 'bar4'}).appendTo($a);
        return $a[0];
    };

    var checkLag = function (getLag, lagElement) {
        var lag;
        if(typeof getLag === "function") {
            lag = getLag();
        }
        var lagLight = $('<div>', {
            'class': 'lag'
        });
        var title;
        var $lag = $(lagElement);
        if (lag) {
            $lag.attr('class', '');
            firstConnection = false;
            title = Messages.lag + ' : ' + lag + ' ms\n';
            if (lag > 30000) {
                $lag.addClass('lag0');
                title = Messages.redLight;
            } else if (lag > 5000) {
                $lag.addClass('lag1');
                title += Messages.orangeLight;
            } else if (lag > 1000) {
                $lag.addClass('lag2');
                title += Messages.orangeLight;
            } else if (lag > 300) {
                $lag.addClass('lag3');
                title += Messages.greenLight;
            } else {
                $lag.addClass('lag4');
                title += Messages.greenLight;
            }
        }
        else if (!firstConnection) {
            $lag.attr('class', '');
            // Display the red light at the 2nd failed attemp to get the lag
            lagLight.addClass('lag-red');
            title = Messages.redLight;
        }
        if (title) {
            $lag.attr('title', title);
        }
    };

    var createLinkToMain = function ($topContainer) {
        var $linkContainer = $('<span>', {
            'class': "cryptpad-link"
        }).appendTo($topContainer);
        var $imgTag = $('<img>', {
            src: "/customize/cryptofist_mini.png",
            alt: "Cryptpad"
        });

        // We need to override the "a" tag action here because it is inside the iframe!
        var $aTagSmall = $('<a>', {
            href: "/",
            title: Messages.header_logoTitle,
            'class': "cryptpad-logo"
        }).append($imgTag);
        var $span = $('<span>').text('CryptPad');
        var $aTagBig = $aTagSmall.clone().addClass('large').append($span);
        $aTagSmall.addClass('narrow');
        var onClick = function (e) {
            e.preventDefault();
            if (e.ctrlKey) {
                window.open('/');
                return;
            }
            window.location = "/";
        };

        var onContext = function (e) { e.stopPropagation(); };

        $aTagBig.click(onClick).contextmenu(onContext);
        $aTagSmall.click(onClick).contextmenu(onContext);

        $linkContainer.append($aTagSmall).append($aTagBig);
    };

    var createUserAdmin = function ($topContainer, config, readOnly, lagElement, Cryptpad) {
        var $lag = $(lagElement);

        var $userContainer = $('<span>', {
            'class': USER_CLS
        }).appendTo($topContainer);

        if (config.displayed.indexOf('state') !== -1) {
            var $state = $('<span>', {
                'class': STATE_CLS
            }).text(Messages.synchronizing).appendTo($userContainer);
        }

        if (config.displayed.indexOf('lag') !== -1) {
            $userContainer.append($lag);
        }

        if (config.displayed.indexOf('newpad') !== -1) {
            var pads_options = [];
            Config.availablePadTypes.forEach(function (p) {
                if (p === 'drive') { return; }
                pads_options.push({
                    tag: 'a',
                    attributes: {
                        'target': '_blank',
                        'href': '/' + p + '/',
                    },
                    content: Messages.type[p]
                });
            });
            var $plusIcon = $('<span>', {'class': 'fa fa-plus'});
            var $newbig = $('<span>', {'class': 'big'}).append(' ' +Messages.newButton);
            var $newButton = $('<div>').append($plusIcon).append($newbig);
            var dropdownConfig = {
                text: $newButton.html(), // Button initial text
                options: pads_options, // Entries displayed in the menu
                left: true, // Open to the left of the button
            };
            var $newPadBlock = Cryptpad.createDropdown(dropdownConfig);
            $newPadBlock.find('button').attr('title', Messages.newButtonTitle);
            $newPadBlock.find('button').attr('id', 'newdoc');
            $newPadBlock.appendTo($userContainer);
        }

        // User dropdown
        if (config.displayed.indexOf('useradmin') !== -1) {
            var userMenuCfg = {};
            if (config.userData) {
                userMenuCfg = {
                    displayNameCls: USERNAME_CLS,
                    changeNameButtonCls: USERBUTTON_CLS,
                };
            }
            if (readOnly !== 1) {
                userMenuCfg.displayName = 1;
                userMenuCfg.displayChangeName = 1;
            }
            var $userAdmin = Cryptpad.createUserAdminMenu(userMenuCfg);

            $userAdmin.attr('id', 'userDropdown');
            $userContainer.append($userAdmin);

            var $userButton = $userAdmin.find('a.' + USERBUTTON_CLS);
            var renameAlertOpened;
            $userButton.click(function (e) {
                e.preventDefault();
                e.stopPropagation();
                Cryptpad.getLastName(function (lastName) {
                    Cryptpad.prompt(Messages.changeNamePrompt, lastName || '', function (newName) {
                        if (newName === null && typeof(lastName) === "string") { return; }
                        if (newName === null) { newName = ''; }
                        Cryptpad.changeDisplayName(newName);
                    });
                });
            });
            Cryptpad.onDisplayNameChanged(function (newName) {
                Cryptpad.findCancelButton().click();
            });
        }

        return $userContainer;
    };

    var createTitle = function ($container, readOnly, config, Cryptpad) {
        var $titleContainer = $('<span>', {
            id: 'toolbarTitle',
            'class': TITLE_CLS
        }).appendTo($container);

        if (!config || typeof config !== "object") { return; }

        var callback = config.onRename;
        var placeholder = config.defaultName;
        var suggestName = config.suggestName;

        // Buttons
        var $text = $('<span>', {
            'class': 'title'
        }).appendTo($titleContainer);
        var $pencilIcon = $('<span>', {
            'class': 'pencilIcon',
            'title': Messages.clickToEdit
        });
        if (readOnly === 1 || typeof(Cryptpad) === "undefined") { return $titleContainer; }
        var $input = $('<input>', {
            type: 'text',
            placeholder: placeholder
        }).appendTo($titleContainer).hide();
        if (readOnly !== 1) {
            $text.attr("title", Messages.clickToEdit);
            $text.addClass("editable");
            var $icon = $('<span>', {
                'class': 'fa fa-pencil readonly',
                style: 'font-family: FontAwesome;'
            });
            $pencilIcon.append($icon).appendTo($titleContainer);
        }

        // Events
        $input.on('mousedown', function (e) {
            if (!$input.is(":focus")) {
                $input.focus();
            }
            e.stopPropagation();
            return true;
        });
        $input.on('keyup', function (e) {
            if (e.which === 13 && connected === true) {
                var name = $input.val().trim();
                if (name === "") {
                    name = $input.attr('placeholder');
                }
                Cryptpad.renamePad(name, function (err, newtitle) {
                    if (err) { return; }
                    $text.text(newtitle);
                    callback(null, newtitle);
                    $input.hide();
                    $text.show();
                    //$pencilIcon.css('display', '');
                });
            }
            else if (e.which === 27) {
                $input.hide();
                $text.show();
                //$pencilIcon.css('display', '');
            }
        });

        var displayInput = function () {
            if (connected === false) { return; }
            $text.hide();
            //$pencilIcon.css('display', 'none');
            var inputVal = suggestName() || "";
            $input.val(inputVal);
            $input.show();
            $input.focus();
        };
        $text.on('click', displayInput);
        $pencilIcon.on('click', displayInput);
        return $titleContainer;
    };

    var create = Bar.create = function ($container, myUserName, realtime, getLag, userList, config) {
        config = config || {};
        var readOnly = (typeof config.readOnly !== "undefined") ? (config.readOnly ? 1 : 0) : -1;
        var Cryptpad = config.common;
        Messages = Cryptpad.Messages;
        config.displayed = config.displayed || [];

        var toolbar = createRealtimeToolbar($container, config.title);
        var userListElement = createUserList(toolbar.find('.' + LEFTSIDE_CLS), config, readOnly, Cryptpad);
        var $titleElement = createTitle(toolbar.find('.' + TOP_CLS), readOnly, config.title, Cryptpad);
        var $linkElement = createLinkToMain(toolbar.find('.' + TOP_CLS));
        var lagElement = createLagElement();
        var $userAdminElement = createUserAdmin(toolbar.find('.' + TOP_CLS), config, readOnly, lagElement, Cryptpad);
        var spinner = createSpinner($userAdminElement, config);
        var userData = config.userData;
        // readOnly = 1 (readOnly enabled), 0 (disabled), -1 (old pad without readOnly mode)
        var saveElement;
        var loadElement;
        var $stateElement = toolbar.find('.' + STATE_CLS);

        if (config.ifrw) {
            var removeDropdowns =  function (e) {
                $container.find('.cryptpad-dropdown').hide();
            };
            var cancelEditTitle = function (e) {
                // Now we want to apply the title even if we click somewhere else
                if ($(e.target).parents('.' + TITLE_CLS).length || !$titleElement) {
                    return;
                }

                if (!$titleElement.find('input').is(':visible')) { return; }

                var ev = $.Event("keyup");
                ev.which = 13;
                $titleElement.find('input').trigger(ev);

                /*
                $titleElement.find('input').hide();
                $titleElement.find('span.title').show();
                $titleElement.find('span.pencilIcon').css('display', '');
                */
            };
            $(config.ifrw).on('click', removeDropdowns);
            $(config.ifrw).on('click', cancelEditTitle);

            try {
                if (config.ifrw.$('iframe').length) {
                    var innerIfrw = config.ifrw.$('iframe').each(function (i, el) {
                        $(el.contentWindow).on('click', removeDropdowns);
                        $(el.contentWindow).on('click', cancelEditTitle);
                    });
                }
            } catch (e) {
                // empty try catch in case this iframe is problematic
            }
        }

        // Update user list
        if (userList) {
            if (userData) {
                userList.change.push(function (newUserData) {
                    var users = userList.users;
                    if (users.indexOf(myUserName) !== -1) { connected = true; }
                    if (!connected) { return; }
                    checkSynchronizing(users, myUserName, $stateElement);
                    updateUserList(config, myUserName, userListElement, users, userData, readOnly, $userAdminElement);
                });
            } else {
                userList.change.push(function () {
                    var users = userList.users;
                    if (users.indexOf(myUserName) !== -1) { connected = true; }
                    if (!connected) { return; }
                    checkSynchronizing(users, myUserName, $stateElement);
                });
            }
        }
        // Display notifications when users are joining/leaving the session
        var oldUserData;
        if (typeof Cryptpad !== "undefined" && userList) {
            var notify = function(type, name, oldname) {
                // type : 1 (+1 user), 0 (rename existing user), -1 (-1 user)
                if (typeof name === "undefined") { return; }
                name = (name === "") ? Messages.anonymous : name;
                switch(type) {
                    case 1:
                        Cryptpad.log(Messages._getKey("notifyJoined", [name]));
                        break;
                    case 0:
                        oldname = (oldname === "") ? Messages.anonymous : oldname;
                        Cryptpad.log(Messages._getKey("notifyRenamed", [oldname, name]));
                        break;
                    case -1:
                        Cryptpad.log(Messages._getKey("notifyLeft", [name]));
                        break;
                    default:
                        console.log("Invalid type of notification");
                        break;
                }
            };

            var userPresent = function (id, user, data) {
                if (!(user && user.uid)) {
                    console.log('no uid');
                    return 0;
                }
                if (!data) {
                    console.log('no data');
                    return 0;
                }

                var count = 0;
                Object.keys(data).forEach(function (k) {
                    if (data[k] && data[k].uid === user.uid) { count++; }
                });
                return count;
            };

            userList.change.push(function (newdata) {
                // Notify for disconnected users
                if (typeof oldUserData !== "undefined") {
                    for (var u in oldUserData) {
        // if a user's uid is still present after having left, don't notify
                        if (userList.users.indexOf(u) === -1) {
                            var temp = JSON.parse(JSON.stringify(oldUserData[u]));
                            delete oldUserData[u];
                            if (userPresent(u, temp, newdata || oldUserData) < 1) {
                                notify(-1, temp.name);
                            }
                        }
                    }
                }
                // Update the "oldUserData" object and notify for new users and names changed
                if (typeof newdata === "undefined") { return; }
                if (typeof oldUserData === "undefined") {
                    oldUserData = JSON.parse(JSON.stringify(newdata));
                    return;
                }
                if (readOnly === 0 && !oldUserData[myUserName]) {
                    oldUserData = JSON.parse(JSON.stringify(newdata));
                    return;
                }
                for (var k in newdata) {
                    if (k !== myUserName && userList.users.indexOf(k) !== -1) {
                        if (typeof oldUserData[k] === "undefined") {
                            // if the same uid is already present in the userdata, don't notify
                            if (!userPresent(k, newdata[k], oldUserData)) {
                                notify(1, newdata[k].name);
                            }
                        } else if (oldUserData[k].name !== newdata[k].name) {
                            notify(0, newdata[k].name, oldUserData[k].name);
                        }
                    }
                }
                oldUserData = JSON.parse(JSON.stringify(newdata));
            });
        }

        var ks = function (local) {
            return function () {
                if (connected) { kickSpinner(Cryptpad, realtime, local, spinner); }
            };
        };

        if (realtime) {
            realtime.onPatch(ks());
            realtime.onMessage(ks(true));

            checkLag(getLag, lagElement);
            setInterval(function () {
                if (!connected) { return; }
                checkLag(getLag, lagElement);
            }, 3000);
        } else { connected = true; }

        var failed = function () {
            connected = false;
            $stateElement.text(Messages.disconnected);
            checkLag(undefined, lagElement);
        };

        // On log out, remove permanently the realtime elements of the toolbar
        Cryptpad.onLogout(function () {
            failed();
            $userAdminElement.find('#userDropdown').hide();
            $(userListElement).hide();
        });

        return {
            failed: failed,
            reconnecting: function (userId) {
                myUserName = userId;
                connected = false;
                $stateElement.text(Messages.reconnecting);
                checkLag(getLag, lagElement);
            },
            connected: function () {
                connected = true;
            }
        };
    };

    return Bar;
});