view examples/browser/web/js/browser.js @ 663:bcc7a6ddb2c8

Better treatment of refine.hopsize

Only adapt the query loop hopping if ADB_REFINE_HOP_SIZE is actually on the
refine flags, rather than blithely taking the value of refine.hopsize.
Significantly reduces the chances of inadvertently causing an infinite loop.

Adjust the tests to remove the 23 now useless instances of
  "refine.hopsize = 1;"

Closes trac ticket #16

var sparqler = new SPARQL.Service("http://harrison/sparql/");

sparqler.setPrefix("mo", "http://purl.org/ontology/mo/");
sparqler.setPrefix("foaf", "http://xmlns.com/foaf/0.1/");
sparqler.setPrefix("dc", "http://purl.org/dc/elements/1.1/");

sparqler.setRequestHeader("Accept", "application/json");

var resultsTable;

$(document).ready(function() {
	$("#search").click(search)
	$("#spinner").hide();
	resultsTable = $('#results').dataTable({"bFilter":false,"bLengthChange":false,"bPaginate":true, 
		"fnRowCallback": function(nRow, aData, iDisplayIndex)
		{
			$(nRow).attr("typeof", "mo:Track");
			return nRow;
		},
		"fnDrawCallback": function ()
		{
			$(".artist_name").click(function(event) { searchArtist($(this).attr("href")); return false; });
			$(".album_name").click(function(event) { searchAlbum($(this).attr("href")); return false; });
		}
	});

	$("#results tbody").click(function(event) {
		$(resultsTable.fnSettings().aoData).each(function (){
			$(this.nTr).removeClass('row_selected');
		});
		$(event.target.parentNode).addClass('row_selected');
	});

});

function search(event) {

	var trackSearchString = $("#tracksearch").val();
	var artistSearchString = $("#artistsearch").val();

	if(trackSearchString.length == 0 && artistSearchString.length == 0)
	{
		resultsTable.fnClearTable();
		return;
	}

	var queryString = "SELECT ?maker ?album ?album_title ?tracknum ?artist_name ?track_title WHERE {";

	queryString += " ?track a mo:Track; mo:track_number ?tracknum; foaf:maker ?maker. ?album mo:track ?track; dc:title ?album_title. ?maker foaf:name ?artist_name";
	
	if(artistSearchString.length > 0)
	{
		queryString += ' FILTER regex(?artist_name, "^'+artistSearchString+'", "i")';
	}
	else
	{
		queryString += ".";
	}
	
	queryString += " ?record mo:track ?track; mo:publication_of ?signal. ?signal dc:title ?track_title";

	if(trackSearchString.length > 0)
	{
		queryString += ' FILTER regex(?track_title, "^'+trackSearchString+'", "i")';
	}
	else
	{
		queryString += ".";
	}

	queryString += " }";

	performSearch(queryString);
}

function searchArtist(id) {
	var queryString = "SELECT ?maker ?album ?album_title ?tracknum ?artist_name ?track_title WHERE {";
	queryString += " ?track a mo:Track; mo:track_number ?tracknum; foaf:maker ?maker. ?album mo:track ?track; dc:title ?album_title. ?maker foaf:name ?artist_name";
	queryString += " ?record mo:track ?track; mo:publication_of ?signal. ?signal dc:title ?track_title.";
	queryString += " FILTER(sameTerm(?maker, <"+id+">))";
	queryString += " }";
	performSearch(queryString);
}

function searchAlbum(id) {
	var queryString = "SELECT ?maker ?album ?album_title ?tracknum ?artist_name ?track_title WHERE {";
	queryString += " ?track a mo:Track; mo:track_number ?tracknum; foaf:maker ?maker. ?album mo:track ?track; dc:title ?album_title. ?maker foaf:name ?artist_name";
	queryString += " ?record mo:track ?track; mo:publication_of ?signal. ?signal dc:title ?track_title.";
	queryString += " FILTER(sameTerm(?album, <"+id+">))";
	queryString += " }";
	performSearch(queryString);
}


function performSearch(queryString) {
	$("#spinner").show();
	$("#query").text(queryString);
	var query = sparqler.createQuery();
	query.query(queryString, {failure: function(xhr) { alert("Bad response! "+xhr.responseText) }, success: displayResults});
}

function displayResults(json) {
	resultsTable.fnClearTable();
	if(json) {
		
		var bindings = json.results.bindings;
		for(var i=0; i<bindings.length; i++)
		{
			var artistEl = $('<div />');
			var artistLink = $('<a/>');
			artistEl.append(artistLink);
			artistLink.attr("href", bindings[i].maker.value);
			artistLink.attr("rel", "foaf:maker");
			artistLink.addClass("artist_name");
			artistLink.append(bindings[i].artist_name.value);
			
			var albumEl = $('<div />');
			var albumLink = $('<a/>');
			albumEl.append(albumLink);
			albumLink.attr("href", bindings[i].album.value);
			albumLink.attr("rel", "dc:title");
			albumLink.addClass("album_name");
			albumLink.append(bindings[i].album_title.value);
			
			resultsTable.fnAddData([artistEl.html(), bindings[i].track_title.value, bindings[i].tracknum.value, albumEl.html()]);
		}

	}
	$("#spinner").hide();
}