jellyfin-web/src/controllers/music/musicartists.js

import loading from '../../components/loading/loading';
import libraryBrowser from '../../scripts/libraryBrowser';
import imageLoader from '../../components/images/imageLoader';
import { AlphaPicker } from '../../components/alphaPicker/alphaPicker';
import listView from '../../components/listview/listview';
import cardBuilder from '../../components/cardbuilder/cardBuilder';
import * as userSettings from '../../scripts/settings/userSettings';
import Events from '../../utils/events.ts';

import '../../elements/emby-itemscontainer/emby-itemscontainer';

export default function (view, params, tabContent) {
    function getPageData(context) {
        const key = getSavedQueryKey(context);
        let pageData = data[key];

        if (!pageData) {
            const queryValues = {
                SortBy: 'SortName',
                SortOrder: 'Ascending',
                Recursive: true,
                Fields: 'PrimaryImageAspectRatio,SortName,BasicSyncInfo',
                StartIndex: 0,
                ImageTypeLimit: 1,
                EnableImageTypes: 'Primary,Backdrop,Banner,Thumb'
            };

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

            pageData = data[key] = {
                query: queryValues,
                view: libraryBrowser.getSavedView(key) || 'Poster'
            };
            pageData.query.ParentId = params.topParentId;
            libraryBrowser.loadSavedQueryValues(key, pageData.query);
        }

        return pageData;
    }

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

    const getSavedQueryKey = (context) => {
        if (!context.savedQueryKey) {
            context.savedQueryKey = libraryBrowser.getSavedQueryKey(this.mode);
        }

        return context.savedQueryKey;
    };

    const onViewStyleChange = () => {
        const viewStyle = this.getCurrentViewStyle();
        const itemsContainer = tabContent.querySelector('.itemsContainer');

        if (viewStyle == 'List') {
            itemsContainer.classList.add('vertical-list');
            itemsContainer.classList.remove('vertical-wrap');
        } else {
            itemsContainer.classList.remove('vertical-list');
            itemsContainer.classList.add('vertical-wrap');
        }

        itemsContainer.innerHTML = '';
    };

    const reloadItems = (page) => {
        loading.show();
        isLoading = true;
        const query = getQuery(page);
        const promise = this.mode == 'albumartists' ?
            ApiClient.getAlbumArtists(ApiClient.getCurrentUserId(), query) :
            ApiClient.getArtists(ApiClient.getCurrentUserId(), query);
        promise.then((result) => {
            function onNextPageClick() {
                if (isLoading) {
                    return;
                }

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

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

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

            window.scrollTo(0, 0);
            this.alphaPicker?.updateControls(query);
            let html;
            const pagingHtml = libraryBrowser.getQueryPagingHtml({
                startIndex: query.StartIndex,
                limit: query.Limit,
                totalRecordCount: result.TotalRecordCount,
                showLimit: false,
                updatePageSizeSetting: false,
                addLayoutButton: false,
                sortButton: false,
                filterButton: false
            });
            const viewStyle = this.getCurrentViewStyle();
            if (viewStyle == 'List') {
                html = listView.getListViewHtml({
                    items: result.Items,
                    sortBy: query.SortBy
                });
            } else if (viewStyle == 'PosterCard') {
                html = cardBuilder.getCardsHtml({
                    items: result.Items,
                    shape: 'square',
                    context: 'music',
                    showTitle: true,
                    coverImage: true,
                    cardLayout: true
                });
            } else {
                html = cardBuilder.getCardsHtml({
                    items: result.Items,
                    shape: 'square',
                    context: 'music',
                    showTitle: true,
                    coverImage: true,
                    lazy: true,
                    centerText: true,
                    overlayPlayButton: true
                });
            }
            let elems = tabContent.querySelectorAll('.paging');

            for (let i = 0, length = elems.length; i < length; i++) {
                elems[i].innerHTML = pagingHtml;
            }

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

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

            const itemsContainer = tabContent.querySelector('.itemsContainer');
            itemsContainer.innerHTML = html;
            imageLoader.lazyChildren(itemsContainer);
            libraryBrowser.saveQueryValues(getSavedQueryKey(page), query);
            loading.hide();
            isLoading = false;

            import('../../components/autoFocuser').then(({ default: autoFocuser }) => {
                autoFocuser.autoFocus(tabContent);
            });
        });
    };

    const data = {};
    let isLoading = false;

    this.showFilterMenu = function () {
        import('../../components/filterdialog/filterdialog').then(({ default: FilterDialog }) => {
            const filterDialog = new FilterDialog({
                query: getQuery(tabContent),
                mode: this.mode,
                serverId: ApiClient.serverId()
            });
            Events.on(filterDialog, 'filterchange', function () {
                getQuery(tabContent).StartIndex = 0;
                reloadItems(tabContent);
            });
            filterDialog.show();
        });
    };

    this.getCurrentViewStyle = function () {
        return getPageData(tabContent).view;
    };

    const initPage = (tabElement) => {
        const alphaPickerElement = tabElement.querySelector('.alphaPicker');
        const itemsContainer = tabElement.querySelector('.itemsContainer');

        alphaPickerElement.addEventListener('alphavaluechanged', function (e) {
            const newValue = e.detail.value;
            const query = getQuery(tabElement);
            if (newValue === '#') {
                query.NameLessThan = 'A';
                delete query.NameStartsWith;
            } else {
                query.NameStartsWith = newValue;
                delete query.NameLessThan;
            }
            query.StartIndex = 0;
            reloadItems(tabElement);
        });
        this.alphaPicker = new AlphaPicker({
            element: alphaPickerElement,
            valueChangeEvent: 'click'
        });

        tabElement.querySelector('.alphaPicker').classList.add('alphabetPicker-right');
        alphaPickerElement.classList.add('alphaPicker-fixed-right');
        itemsContainer.classList.add('padded-right-withalphapicker');

        tabElement.querySelector('.btnFilter').addEventListener('click', () => {
            this.showFilterMenu();
        });
        const btnSelectView = tabElement.querySelector('.btnSelectView');
        btnSelectView.addEventListener('click', (e) => {
            libraryBrowser.showLayoutMenu(e.target, this.getCurrentViewStyle(), 'List,Poster,PosterCard'.split(','));
        });
        btnSelectView.addEventListener('layoutchange', function (e) {
            const viewStyle = e.detail.viewStyle;
            getPageData(tabElement).view = viewStyle;
            libraryBrowser.saveViewSetting(getSavedQueryKey(tabElement), viewStyle);
            getQuery(tabElement).StartIndex = 0;
            onViewStyleChange();
            reloadItems(tabElement);
        });
    };

    initPage(tabContent);
    onViewStyleChange();

    this.renderTab = () => {
        reloadItems(tabContent);
        this.alphaPicker?.updateControls(getQuery(tabContent));
    };
}