From cf58dcf116c87550fe0b76da7159146cb86869d8 Mon Sep 17 00:00:00 2001
From: saqimtiaz <saq.imtiaz@gmail.com>
Date: Sat, 7 Nov 2020 11:29:15 +0100
Subject: [PATCH] Add is[draft] operator (#4991)

---
 core/modules/filters/is/draft.js | 36 ++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 core/modules/filters/is/draft.js

diff --git a/core/modules/filters/is/draft.js b/core/modules/filters/is/draft.js
new file mode 100644
index 000000000..3dd183a46
--- /dev/null
+++ b/core/modules/filters/is/draft.js
@@ -0,0 +1,36 @@
+/*\
+title: $:/core/modules/filters/is/draft.js
+type: application/javascript
+module-type: isfilteroperator
+
+Filter function for [is[draft]] analagous to [has[draft.of]]
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter function
+*/
+exports.draft = function(source,prefix,options) {
+	var results = [];
+	if(prefix === "!") {
+		source(function(tiddler,title) {
+			if(!tiddler || !$tw.utils.hop(tiddler.fields,"draft.of")) {
+				results.push(title);
+			}
+		});
+	} else {
+		source(function(tiddler,title) {
+			if(tiddler && $tw.utils.hop(tiddler.fields,"draft.of") && (tiddler.fields["draft.of"].length !== 0)) {
+				results.push(title);
+			}
+		});				
+	}
+	return results;
+};
+
+})();