MediaWiki:Gadget-tutorials.js: Difference between revisions

Revision as of 01:32, 2 April 2026

/* =============================================================================
   Gadget-tutorials.js  v2.1
   Unified tutorial hub — API-powered search, tag filtering, pagination.
   ============================================================================= */
( function () {

    if ( mw.config.get( 'wgPageName' ) !== 'Tutorials' ) { return; }

    $( function () {

        var PAGE_SIZE  = 24;
        var generation = 0;

        var state = {
            search : '',
            tag    : '',
            sort   : 'newest',
            offset : 0,
            done   : false,
            busy   : false
        };

        var $wrapper = $( '.tutorial-hub-wrapper' );
        if ( !$wrapper.length ) { return; }

        var $filters  = $wrapper.find( '.tutorial-hub-filters' );
        var $tagCloud = $wrapper.find( '.tutorial-hub-tagcloud' );
        var $grid     = $wrapper.find( '.tutorial-hub-grid' );
        var $count    = $( '<span>' ).addClass( 'tutorial-hub-count' );

        var $more = $( '<button>' )
            .addClass( 'tutorial-hub-loadmore' )
            .text( 'Load more tutorials' )
            .hide()
            .appendTo( $wrapper );

        // ── Filter bar ─────────────────────────────────────────────────────────
        var $search = $( '<input>' ).attr( {
            type        : 'text',
            placeholder : 'Search name, description, tags\u2026',
            'class'     : 'project-hub-search'
        } );
        var $sort = $( '<select>' ).addClass( 'project-hub-select' ).append(
            $( '<option>' ).val( 'newest' ).text( 'Newest first' ),
            $( '<option>' ).val( 'alpha'  ).text( 'A \u2013 Z' )
        );
        $filters.append( $search, $sort, $count );

        // ── Events ─────────────────────────────────────────────────────────────
        var searchDebounce;
        $search.on( 'input', function () {
            clearTimeout( searchDebounce );
            searchDebounce = setTimeout( function () {
                state.search = $search.val().trim();
                resetAndLoad();
            }, 350 );
        } );

        $sort.on( 'change', function () {
            state.sort = $sort.val();
            resetAndLoad();
        } );

        $more.on( 'click', function () {
            if ( !state.busy ) { fetchPage(); }
        } );

        $( document ).on( 'click', '.js-tutorial-tag', function ( e ) {
            e.stopPropagation();
            var tag = $( this ).data( 'tag' );
            if ( state.tag === tag ) {
                state.tag = '';
                $( '.js-tutorial-tag' ).removeClass( 'is-active' );
            } else {
                state.tag = tag;
                $( '.js-tutorial-tag' ).removeClass( 'is-active' );
                $( '.js-tutorial-tag' ).filter( function () {
                    return $( this ).data( 'tag' ) === tag;
                } ).addClass( 'is-active' );
            }
            resetAndLoad();
        } );

        // ── Boot ───────────────────────────────────────────────────────────────
        loadTagCloud();
        loadHubMeta();
        fetchPage();

        // ── Helpers ────────────────────────────────────────────────────────────
        function resetAndLoad() {
            generation++;
            state.offset = 0;
            state.done   = false;
            state.busy   = false;
            $grid.empty();
            $more.hide();
            fetchPage();
        }

        function buildWhere() {
            var parts = [];
            if ( state.search ) {
                var q = state.search.replace( /'/g, "''" );
                parts.push(
                    "( name LIKE '%" + q + "%'" +
                    " OR description LIKE '%" + q + "%'" +
                    " OR tags LIKE '%" + q + "%' )"
                );
            }
            if ( state.tag ) {
                parts.push( "tags HOLDS '" + state.tag.replace( /'/g, "''" ) + "'" );
            }
            return parts.join( ' AND ' );
        }

        function orderBy() {
            return state.sort === 'alpha' ? 'name ASC' : '_pageID DESC';
        }

        // ── Data ───────────────────────────────────────────────────────────────
        function fetchPage() {
            if ( state.busy || state.done ) { return; }
            state.busy = true;
            var gen = ++generation;
            $more.text( 'Loading\u2026' ).show();

            var params = {
                action   : 'cargoquery',
                tables   : 'Tutorials',
                fields   : '_pageName=pagename,name,description,image,tags',
                order_by : orderBy(),
                limit    : PAGE_SIZE,
                offset   : state.offset,
                format   : 'json'
            };
            var w = buildWhere();
            if ( w ) { params.where = w; }
            if ( state.offset === 0 ) { fetchTotal( w ); }

            $.getJSON( mw.util.wikiScript( 'api' ), params )
                .done( function ( data ) {
                    if ( gen !== generation ) { return; }

                    var rows    = ( data.cargoquery || [] ).map( function ( r ) { return r.title; } );
                    var prevOff = state.offset;
                    var batch   = [];

                    rows.forEach( function ( row ) {
                        var $c = buildCard( row );
                        $grid.append( $c );
                        batch.push( { $el: $c, page: row.pagename } );
                    } );

                    enrichCards( batch );

                    state.offset += rows.length;
                    state.done    = rows.length < PAGE_SIZE;
                    state.busy    = false;

                    $more.text( 'Load more tutorials' ).toggle( !state.done );

                    if ( rows.length === 0 && prevOff === 0 ) {
                        $grid.html( '<div class="project-hub-empty">No tutorials found matching your search.</div>' );
                        $more.hide();
                    }
                } )
                .fail( function () {
                    if ( gen !== generation ) { return; }
                    state.busy = false;
                    $more.text( 'Load more tutorials' ).toggle( !state.done );
                } );
        }

        function fetchTotal( where ) {
            var p = { action: 'cargoquery', tables: 'Tutorials', fields: 'COUNT(*)=n', limit: 1, format: 'json' };
            if ( where ) { p.where = where; }
            $.getJSON( mw.util.wikiScript( 'api' ), p ).done( function ( data ) {
                var row = ( data.cargoquery || [] )[ 0 ];
                var n   = row ? ( parseInt( row.title.n, 10 ) || 0 ) : 0;
                $count.text( n + ' tutorial' + ( n === 1 ? '' : 's' ) );
            } );
        }

        function loadTagCloud() {
            $.getJSON( mw.util.wikiScript( 'api' ), {
                action: 'cargoquery', tables: 'Tutorials', fields: 'tags', limit: 500, format: 'json'
            } ).done( function ( data ) {
                var freq = {};
                ( data.cargoquery || [] ).forEach( function ( r ) {
                    ( r.title.tags || '' ).split( ',' ).forEach( function ( t ) {
                        t = t.trim();
                        if ( t ) { freq[ t ] = ( freq[ t ] || 0 ) + 1; }
                    } );
                } );
                var top = Object.keys( freq )
                    .sort( function ( a, b ) { return freq[ b ] - freq[ a ]; } )
                    .slice( 0, 25 );
                if ( !top.length ) { return; }
                top.forEach( function ( tag ) {
                    $tagCloud.append(
                        $( '<span>' ).addClass( 'js-tutorial-tag' ).attr( 'data-tag', tag ).text( tag )
                    );
                } );
                $tagCloud.show();
            } );
        }

        function loadHubMeta() {
            mw.loader.using( 'mediawiki.api' ).then( function () {
                new mw.Api().get( {
                    action: 'query', list: 'categorymembers', cmtitle: 'Category:Tutorials',
                    cmsort: 'timestamp', cmdir: 'desc', cmlimit: 1,
                    cmtype: 'page', cmprop: 'ids|title|timestamp', format: 'json'
                } ).done( function ( data ) {
                    var m = data.query && data.query.categorymembers;
                    if ( !m || !m.length ) { return; }
                    var str = m[ 0 ].title.replace( /^.*\//, '' ) + ' \u2014 ' +
                        ( m[ 0 ].timestamp
                            ? new Date( m[ 0 ].timestamp ).toLocaleDateString(
                                'en-GB', { day: 'numeric', month: 'short', year: 'numeric' } )
                            : '\u2014' );
                    $( '#hub-meta-last-submission, #hub-meta-last-edit' ).text( str );
                } );
            } );
        }

        // ── Card rendering ──────────────────────────────────────────────────────
        function esc( s ) { return mw.html.escape( s || '' ); }

        function fileUrl( f ) {
            return f ? mw.config.get( 'wgServer' ) + '/wiki/Special:FilePath/' + encodeURIComponent( f ) : '';
        }

        function buildCard( row ) {
            var page = row.pagename || '';
            var name = row.name || page.replace( /^.*\//, '' );
            var url  = mw.util.getUrl( page );

            var img = row.image
                ? '<img src="' + esc( fileUrl( row.image ) ) + '" alt="' + esc( name ) + '" loading="lazy">'
                : '<div class="tutorial-card-image-fallback"></div>';

            var tags = '';
            ( row.tags || '' ).split( ',' ).forEach( function ( t ) {
                t = t.trim();
                if ( t ) {
                    tags += '<span class="tutorial-card-tag js-tutorial-tag" data-tag="' +
                        esc( t ) + '">' + esc( t ) + '</span>';
                }
            } );

            return $( [
                '<div class="tutorial-card-wrap">',
                  '<div class="tutorial-card">',
                    '<div class="tutorial-card-image">', img, '</div>',
                    '<div class="tutorial-card-body">',
                      '<div class="tutorial-card-title"><a href="', url, '">', esc( name ), '</a></div>',
                      tags ? '<div class="tutorial-card-meta">' + tags + '</div>' : '',
                      '<div class="tutorial-card-stats">',
                        '<span class="tutorial-card-contributors">\u2014</span>',
                        '<span class="tutorial-card-updated">\u2014</span>',
                      '</div>',
                    '</div>',
                    row.description
                      ? '<div class="tutorial-card-description">' + esc( row.description ) + '</div>'
                      : '',
                  '</div>',
                '</div>'
            ].join( '' ) );
        }

        function enrichCards( batch ) {
            if ( !batch.length ) { return; }
            var api = new mw.Api();
            for ( var i = 0; i < batch.length; i += 20 ) {
                ( function ( chunk ) {
                    api.get( {
                        action: 'query',
                        titles: chunk.map( function ( c ) { return c.page; } ).join( '|' ),
                        prop: 'revisions|contributors',
                        rvprop: 'timestamp', rvlimit: 1, pclimit: 20,
                        format: 'json'
                    } ).done( function ( data ) {
                        if ( !data.query ) { return; }
                        $.each( data.query.pages || {}, function ( _, page ) {
                            if ( page.missing !== undefined ) { return; }
                            var match = chunk.filter( function ( c ) { return c.page === page.title; } );
                            if ( !match.length ) { return; }
                            var $el = match[ 0 ].$el;
                            var ts  = ( page.revisions && page.revisions[ 0 ] && page.revisions[ 0 ].timestamp ) || '';
                            var n   = ( page.contributors ? page.contributors.length : 0 ) + ( page.anoncontributors || 0 );
                            var d   = ts ? new Date( ts ).toLocaleDateString( 'en-GB', { year: 'numeric', month: 'short' } ) : '\u2014';
                            $el.find( '.tutorial-card-contributors' ).text( n + ( n === 1 ? ' contributor' : ' contributors' ) );
                            $el.find( '.tutorial-card-updated' ).text( 'Edited ' + d );
                        } );
                    } );
                } )( batch.slice( i, i + 20 ) );
            }
        }

    } );

} () );