jellyfin-web/src/controllers/wizard/start.js

define(["jQuery", "loading", "emby-button", "emby-select"], function ($, loading) {
    "use strict";

    function loadPage(page, config, languageOptions) {
        $("#selectLocalizationLanguage", page).html(languageOptions.map(function (l) {
            return '<option value="' + l.Value + '">' + l.Name + "</option>";
        })).val(config.UICulture);
        loading.hide();
    }

    function save(page) {
        loading.show();
        var apiClient = ApiClient;
        apiClient.getJSON(apiClient.getUrl("Startup/Configuration")).then(function (config) {
            config.UICulture = $("#selectLocalizationLanguage", page).val();
            apiClient.ajax({
                type: "POST",
                data: config,
                url: apiClient.getUrl("Startup/Configuration")
            }).then(function () {
                Dashboard.navigate("wizarduser.html");
            });
        });
    }

    function onSubmit() {
        save($(this).parents(".page"));
        return false;
    }

    return function (view, params) {
        $(".wizardStartForm", view).on("submit", onSubmit);
        view.addEventListener("viewshow", function () {
            document.querySelector(".skinHeader").classList.add("noHomeButtonHeader");
            loading.show();
            var page = this;
            var apiClient = ApiClient;
            var promise1 = apiClient.getJSON(apiClient.getUrl("Startup/Configuration"));
            var promise2 = apiClient.getJSON(apiClient.getUrl("Localization/Options"));
            Promise.all([promise1, promise2]).then(function (responses) {
                loadPage(page, responses[0], responses[1]);
            });
        });
        view.addEventListener("viewhide", function () {
            document.querySelector(".skinHeader").classList.remove("noHomeButtonHeader");
        });
    };
});