68 lines
1.4 KiB
JavaScript
68 lines
1.4 KiB
JavaScript
/*\
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title: $:/core/modules/filters/each.js
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type: application/javascript
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module-type: filteroperator
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Filter operator that selects one tiddler for each unique value of the specified field.
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With suffix "list", selects all tiddlers that are values in a specified list field.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Export our filter function
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*/
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exports.each = function(source,operator,options) {
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var results =[] ,
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value,values = {},
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field = operator.operand || "title";
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if(operator.suffix === "value" && field === "title") {
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source(function(tiddler,title) {
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if(!$tw.utils.hop(values,title)) {
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values[title] = true;
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results.push(title);
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}
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});
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} else if(operator.suffix !== "list-item") {
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if(field === "title") {
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source(function(tiddler,title) {
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if(tiddler && !$tw.utils.hop(values,title)) {
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values[title] = true;
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results.push(title);
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}
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});
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} else {
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source(function(tiddler,title) {
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if(tiddler) {
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value = tiddler.getFieldString(field);
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if(!$tw.utils.hop(values,value)) {
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values[value] = true;
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results.push(title);
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}
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}
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});
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}
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} else {
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source(function(tiddler,title) {
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if(tiddler) {
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$tw.utils.each(
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options.wiki.getTiddlerList(title,field),
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function(value) {
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if(!$tw.utils.hop(values,value)) {
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values[value] = true;
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results.push(value);
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}
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}
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);
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}
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});
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}
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return results;
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};
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})();
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