jellyfin-web/src/controllers/auth/login.js

define(['apphost', 'appSettings', 'dom', 'connectionManager', 'loading', 'layoutManager', 'browser', 'globalize', 'cardStyle', 'emby-checkbox'], function (appHost, appSettings, dom, connectionManager, loading, layoutManager, browser, globalize) {
    'use strict';

    var enableFocusTransform = !browser.slow && !browser.edge;

    function authenticateUserByName(page, apiClient, username, password) {
        loading.show();
        apiClient.authenticateUserByName(username, password).then(function (result) {
            var user = result.User;
            var serverId = getParameterByName('serverid');
            var newUrl;

            if (user.Policy.IsAdministrator && !serverId) {
                newUrl = 'dashboard.html';
            } else {
                newUrl = 'home.html';
            }

            loading.hide();
            Dashboard.onServerChanged(user.Id, result.AccessToken, apiClient);
            Dashboard.navigate(newUrl);
        }, function (response) {
            page.querySelector('#txtManualName').value = '';
            page.querySelector('#txtManualPassword').value = '';
            loading.hide();

            const UnauthorizedOrForbidden = [401, 403];
            if (UnauthorizedOrForbidden.includes(response.status)) {
                require(['toast'], function (toast) {
                    const messageKey = response.status === 401 ? 'MessageInvalidUser' : 'MessageUnauthorizedUser';
                    toast(globalize.translate(messageKey));
                });
            } else {
                Dashboard.alert({
                    message: globalize.translate('MessageUnableToConnectToServer'),
                    title: globalize.translate('HeaderConnectionFailure')
                });
            }
        });
    }

    function showManualForm(context, showCancel, focusPassword) {
        context.querySelector('.chkRememberLogin').checked = appSettings.enableAutoLogin();
        context.querySelector('.manualLoginForm').classList.remove('hide');
        context.querySelector('.visualLoginForm').classList.add('hide');
        context.querySelector('.btnManual').classList.add('hide');

        if (focusPassword) {
            context.querySelector('#txtManualPassword').focus();
        } else {
            context.querySelector('#txtManualName').focus();
        }

        if (showCancel) {
            context.querySelector('.btnCancel').classList.remove('hide');
        } else {
            context.querySelector('.btnCancel').classList.add('hide');
        }
    }

    var metroColors = ['#6FBD45', '#4BB3DD', '#4164A5', '#E12026', '#800080', '#E1B222', '#008040', '#0094FF', '#FF00C7', '#FF870F', '#7F0037'];

    function getRandomMetroColor() {
        var index = Math.floor(Math.random() * (metroColors.length - 1));
        return metroColors[index];
    }

    function getMetroColor(str) {
        if (str) {
            var character = String(str.substr(0, 1).charCodeAt());
            var sum = 0;

            for (var i = 0; i < character.length; i++) {
                sum += parseInt(character.charAt(i));
            }

            var index = String(sum).substr(-1);
            return metroColors[index];
        }

        return getRandomMetroColor();
    }

    function loadUserList(context, apiClient, users) {
        var html = '';

        for (var i = 0; i < users.length; i++) {
            var user = users[i];

            // TODO move card creation code to Card component
            var cssClass = 'card squareCard scalableCard squareCard-scalable';

            if (layoutManager.tv) {
                cssClass += ' show-focus';

                if (enableFocusTransform) {
                    cssClass += ' show-animation';
                }
            }

            var cardBoxCssClass = 'cardBox cardBox-bottompadded';
            html += '<button type="button" class="' + cssClass + '">';
            html += '<div class="' + cardBoxCssClass + '">';
            html += '<div class="cardScalable">';
            html += '<div class="cardPadder cardPadder-square"></div>';
            html += '<div class="cardContent" data-haspw="' + user.HasPassword + '" data-username="' + user.Name + '" data-userid="' + user.Id + '">';
            var imgUrl;

            if (user.PrimaryImageTag) {
                imgUrl = apiClient.getUserImageUrl(user.Id, {
                    width: 300,
                    tag: user.PrimaryImageTag,
                    type: 'Primary'
                });
                html += '<div class="cardImageContainer coveredImage coveredImage-noScale" style="background-image:url(\'' + imgUrl + "');\"></div>";
            } else {
                var background = getMetroColor(user.Id);
                imgUrl = 'assets/img/avatar.png';
                html += '<div class="cardImageContainer coveredImage coveredImage-noScale" style="background-image:url(\'' + imgUrl + "');background-color:" + background + ';"></div>';
            }

            html += '</div>';
            html += '</div>';
            html += '<div class="cardFooter visualCardBox-cardFooter">';
            html += '<div class="cardText singleCardText cardTextCentered">' + user.Name + '</div>';
            html += '</div>';
            html += '</div>';
            html += '</button>';
        }

        context.querySelector('#divUsers').innerHTML = html;
    }

    return function (view, params) {
        function getApiClient() {
            var serverId = params.serverid;

            if (serverId) {
                return connectionManager.getOrCreateApiClient(serverId);
            }

            return ApiClient;
        }

        function showVisualForm() {
            view.querySelector('.visualLoginForm').classList.remove('hide');
            view.querySelector('.manualLoginForm').classList.add('hide');
            view.querySelector('.btnManual').classList.remove('hide');

            require(['autoFocuser'], function (autoFocuser) {
                autoFocuser.autoFocus(view);
            });
        }

        view.querySelector('#divUsers').addEventListener('click', function (e) {
            var card = dom.parentWithClass(e.target, 'card');
            var cardContent = card ? card.querySelector('.cardContent') : null;

            if (cardContent) {
                var context = view;
                var id = cardContent.getAttribute('data-userid');
                var name = cardContent.getAttribute('data-username');
                var haspw = cardContent.getAttribute('data-haspw');

                if (id === 'manual') {
                    context.querySelector('#txtManualName').value = '';
                    showManualForm(context, true);
                } else if (haspw == 'false') {
                    authenticateUserByName(context, getApiClient(), name, '');
                } else {
                    context.querySelector('#txtManualName').value = name;
                    context.querySelector('#txtManualPassword').value = '';
                    showManualForm(context, true, true);
                }
            }
        });
        view.querySelector('.manualLoginForm').addEventListener('submit', function (e) {
            appSettings.enableAutoLogin(view.querySelector('.chkRememberLogin').checked);
            var apiClient = getApiClient();
            authenticateUserByName(view, apiClient, view.querySelector('#txtManualName').value, view.querySelector('#txtManualPassword').value);
            e.preventDefault();
            return false;
        });
        view.querySelector('.btnForgotPassword').addEventListener('click', function () {
            Dashboard.navigate('forgotpassword.html');
        });
        view.querySelector('.btnCancel').addEventListener('click', showVisualForm);
        view.querySelector('.btnManual').addEventListener('click', function () {
            view.querySelector('#txtManualName').value = '';
            showManualForm(view, true);
        });
        view.querySelector('.btnSelectServer').addEventListener('click', function () {
            Dashboard.selectServer();
        });
        view.addEventListener('viewshow', function (e) {
            loading.show();

            if (!appHost.supports('multiserver')) {
                view.querySelector('.btnSelectServer').classList.add('hide');
            }

            var apiClient = getApiClient();
            apiClient.getPublicUsers().then(function (users) {
                if (users.length) {
                    showVisualForm();
                    loadUserList(view, apiClient, users);
                } else {
                    view.querySelector('#txtManualName').value = '';
                    showManualForm(view, false, false);
                }
            }).catch().then(function () {
                loading.hide();
            });
            apiClient.getJSON(apiClient.getUrl('Branding/Configuration')).then(function (options) {
                view.querySelector('.disclaimer').textContent = options.LoginDisclaimer || '';
            });
        });
    };
});