jellyfin-web/src/controllers/livetv/livetvchannels.js

define(['cardBuilder', 'imageLoader', 'libraryBrowser', 'loading', 'events', 'userSettings', 'emby-itemscontainer'], function (cardBuilder, imageLoader, libraryBrowser, loading, events, userSettings) {
    'use strict';

    return function (view, params, tabContent) {
        function getPageData() {
            if (!pageData) {
                pageData = {
                    query: {
                        StartIndex: 0,
                        Fields: 'PrimaryImageAspectRatio'
                    }
                };
            }

            if (userSettings.libraryPageSize() > 0) {
                pageData.query['Limit'] = userSettings.libraryPageSize();
            }

            return pageData;
        }

        function getQuery() {
            return getPageData().query;
        }

        function getChannelsHtml(channels) {
            return cardBuilder.getCardsHtml({
                items: channels,
                shape: 'square',
                showTitle: true,
                lazy: true,
                cardLayout: true,
                showDetailsMenu: true,
                showCurrentProgram: true,
                showCurrentProgramTime: true
            });
        }

        function renderChannels(context, result) {
            function onNextPageClick() {
                if (isLoading) {
                    return;
                }

                if (userSettings.libraryPageSize() > 0) {
                    query.StartIndex += query.Limit;
                }
                reloadItems(context);
            }

            function onPreviousPageClick() {
                if (isLoading) {
                    return;
                }

                if (userSettings.libraryPageSize() > 0) {
                    query.StartIndex = Math.max(0, query.StartIndex - query.Limit);
                }
                reloadItems(context);
            }

            var query = getQuery();
            context.querySelector('.paging').innerHTML = libraryBrowser.getQueryPagingHtml({
                startIndex: query.StartIndex,
                limit: query.Limit,
                totalRecordCount: result.TotalRecordCount,
                showLimit: false,
                updatePageSizeSetting: false,
                filterButton: false
            });
            var html = getChannelsHtml(result.Items);
            var elem = context.querySelector('#items');
            elem.innerHTML = html;
            imageLoader.lazyChildren(elem);
            var i;
            var length;
            var elems;

            for (elems = context.querySelectorAll('.btnNextPage'), i = 0, length = elems.length; i < length; i++) {
                elems[i].addEventListener('click', onNextPageClick);
            }

            for (elems = context.querySelectorAll('.btnPreviousPage'), i = 0, length = elems.length; i < length; i++) {
                elems[i].addEventListener('click', onPreviousPageClick);
            }
        }

        function showFilterMenu(context) {
            require(['components/filterdialog/filterdialog'], function ({default: filterDialogFactory}) {
                var filterDialog = new filterDialogFactory({
                    query: getQuery(),
                    mode: 'livetvchannels',
                    serverId: ApiClient.serverId()
                });
                events.on(filterDialog, 'filterchange', function () {
                    reloadItems(context);
                });
                filterDialog.show();
            });
        }

        function reloadItems(context, save) {
            loading.show();
            isLoading = true;
            var query = getQuery();
            var apiClient = ApiClient;
            query.UserId = apiClient.getCurrentUserId();
            apiClient.getLiveTvChannels(query).then(function (result) {
                renderChannels(context, result);
                loading.hide();
                isLoading = false;

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

        var pageData;
        var self = this;
        var isLoading = false;
        tabContent.querySelector('.btnFilter').addEventListener('click', function () {
            showFilterMenu(tabContent);
        });

        self.renderTab = function () {
            reloadItems(tabContent);
        };
    };
});