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$(document).ready(function() { |
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window.doSearch = function() { |
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// In case the source doesn't supply data required for DT to calculate |
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// pagination, we need to do it ourselves |
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var ownPagination = false; |
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var directionSet = false; |
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var start = 0; |
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var forward = true; // true == forward, false == backwards |
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// Arbitrary starting value, it will be corrected by the first |
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// page of results |
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var pageSize = 20; |
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|
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var tableTmpl = { |
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ajax: { |
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cache: true, // Prevent DT appending a "_" cache param |
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}, |
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columns: [ |
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// defaultContent prevents DT from choking if |
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// the API response doesn't return a column |
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{ |
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title: 'Source', |
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data: 'source', |
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defaultContent: '' |
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}, |
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{ |
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data: 'title', |
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defaultContent: '' |
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}, |
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{ |
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data: 'author', |
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defaultContent: '' |
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}, |
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{ |
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data: 'isbn', |
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defaultContent: '' |
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}, |
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{ |
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data: 'issn', |
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defaultContent: '' |
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}, |
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{ |
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data: 'date', |
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defaultContent: '' |
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} |
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] |
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}; |
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// render functions don't get copied across when we make a dereferenced |
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// copy of them, so we have to reattach them once we have a copy |
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// Here we store them |
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var renders = { |
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title: function(data, type, row) { |
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return row.url ? |
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'<a href="'+row.url+'" target="_blank">'+row.title+'</a>' : |
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row.title; |
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}, |
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source: function(data, type, row) { |
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return row.opac_url ? |
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'<a href="'+row.opac_url+'" target="_blank">'+row.source+'</a>' : |
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row.source; |
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} |
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}; |
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services.forEach(function(service) { |
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// Create a deferenced copy of our table definition object |
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var tableDef = JSON.parse(JSON.stringify(tableTmpl)); |
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// Iterate the table's columns array and add render functions |
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// as necessary |
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tableDef.columns.forEach(function(column) { |
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if (renders[column.data]) { |
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column.render = renders[column.data]; |
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} |
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}); |
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tableDef.ajax.dataSrc = function(data) { |
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var results = data.results.search_results; |
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// The source appears to be returning it's own pagination |
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// data |
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if ( |
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data.hasOwnProperty('recordsFiltered') || |
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data.hasOwnProperty('recordsTotal') |
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) { |
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return results; |
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} |
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// Set up our own pagination values based on what we just |
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// got back |
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ownPagination = true; |
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directionSet = false; |
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pageSize = results.length; |
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// These values are completely arbitrary, but they enable |
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// us to display pagination links |
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data.recordsFiltered = 5000, |
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data.recordsTotal = 5000; |
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return results; |
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}; |
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tableDef.ajax.data = function(data) { |
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// Datatables sends a bunch of superfluous params |
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// that we don't want to litter our API schema |
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// with, so just remove them from the request |
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if (data.hasOwnProperty('columns')) { |
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delete data.columns; |
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} |
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if (data.hasOwnProperty('draw')) { |
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delete data.draw; |
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} |
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if (data.hasOwnProperty('order')) { |
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delete data.order; |
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} |
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if (data.hasOwnProperty('search')) { |
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delete data.search; |
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} |
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// If we're handling our own pagination, set the properties |
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// that DT will send in the request |
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if (ownPagination) { |
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start = forward ? start + pageSize : start - pageSize; |
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data.start = start; |
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data['length'] = pageSize; |
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} |
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// We may need to restrict the service IDs being queries, this |
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// needs to be handled in the plugin's API module |
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var restrict = $('#service_id_restrict'). |
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attr('data-service_id_restrict_ids'); |
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if (restrict && restrict.length > 0) { |
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data.restrict = restrict; |
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} |
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}; |
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// Add any datatables config options passed from the service |
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// to the table definition |
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tableDef.ajax.url = service.endpoint + metadata; |
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if (service.hasOwnProperty('datatablesConfig')) { |
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var conf = service.datatablesConfig; |
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for (var key in conf) { |
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// The config from the service definition comes from a Perl |
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// hashref, therefore can't contain true/false, so we |
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// special case it |
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if (conf.hasOwnProperty(key)) { |
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if (conf[key] == 'false') { |
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// Special case false values |
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tableDef[key] = false; |
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} else if (conf[key] == 'true') { |
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// Special case true values |
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tableDef[key] = true; |
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} else { |
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// Copy the property value |
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tableDef[key] = conf[key]; |
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} |
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} |
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} |
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} |
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// Create event watchers for the "next" and "previous" pagination |
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// links, this enables us to set the direction the next request is |
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// going in when we're doing our own pagination. We use "hover" |
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// because the click event is caught after the request has been |
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// sent |
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tableDef.drawCallback = function() { |
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$('.paginate_button.next:not(.disabled)', |
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this.api().table().container() |
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).on('hover', function() { |
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forward = true; |
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directionSet = true; |
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}); |
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$('.paginate_button.previous:not(.disabled)', |
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this.api().table().container() |
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).on('hover', function() { |
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forward = false; |
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directionSet = true; |
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}); |
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} |
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// Initialise the table |
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$('#'+service.id ).dataTable( |
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$.extend(true, {}, dataTablesDefaults, tableDef) |
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); |
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}); |
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} |
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}); |