From 5600a00cd80257208f5165c1f6b12f97bd3e1302 Mon Sep 17 00:00:00 2001
From: lin onetwo <linonetwo012@gmail.com>
Date: Mon, 17 Jun 2024 17:51:50 +0800
Subject: [PATCH] refactor: move links ast extractor to a file

---
 core/modules/wiki-extract.js | 60 ++++++++++++++++++++++++++++++++++++
 core/modules/wiki.js         | 60 ------------------------------------
 2 files changed, 60 insertions(+), 60 deletions(-)

diff --git a/core/modules/wiki-extract.js b/core/modules/wiki-extract.js
index 9f4aad588..6b77ae7b9 100644
--- a/core/modules/wiki-extract.js
+++ b/core/modules/wiki-extract.js
@@ -12,6 +12,66 @@ AST information extractor for indexers.
 /*global $tw: false */
 "use strict";
 
+/*
+Return an array of tiddler titles that are directly linked within the given parse tree
+ */
+exports.extractLinks = function(parseTreeRoot) {
+	// Count up the links
+	var links = [],
+		checkParseTree = function(parseTree) {
+			for(var t=0; t<parseTree.length; t++) {
+				var parseTreeNode = parseTree[t];
+				if(parseTreeNode.type === "link" && parseTreeNode.attributes.to && parseTreeNode.attributes.to.type === "string") {
+					var value = parseTreeNode.attributes.to.value;
+					if(links.indexOf(value) === -1) {
+						links.push(value);
+					}
+				}
+				if(parseTreeNode.children) {
+					checkParseTree(parseTreeNode.children);
+				}
+			}
+		};
+	checkParseTree(parseTreeRoot);
+	return links;
+};
+
+/*
+Return an array of tiddler titles that are directly linked from the specified tiddler
+*/
+exports.getTiddlerLinks = function(title) {
+	var self = this;
+	// We'll cache the links so they only get computed if the tiddler changes
+	return this.getCacheForTiddler(title,"links",function() {
+		// Parse the tiddler
+		var parser = self.parseTiddler(title);
+		if(parser) {
+			return self.extractLinks(parser.tree);
+		}
+		return [];
+	});
+};
+
+/*
+Return an array of tiddler titles that link to the specified tiddler
+*/
+exports.getTiddlerBacklinks = function(targetTitle) {
+	var self = this,
+		backIndexer = this.getIndexer("BackIndexer"),
+		backlinks = backIndexer && backIndexer.subIndexers.link.lookup(targetTitle);
+
+	if(!backlinks) {
+		backlinks = [];
+		this.forEachTiddler(function(title,tiddler) {
+			var links = self.getTiddlerLinks(title);
+			if(links.indexOf(targetTitle) !== -1) {
+				backlinks.push(title);
+			}
+		});
+	}
+	return backlinks;
+};
+
 /*
 Return an array of tiddler titles that are directly transcluded within the given parse tree. `title` is the tiddler being parsed, we will ignore its self-referential transclusions, only return
 */
diff --git a/core/modules/wiki.js b/core/modules/wiki.js
index dcb62d7d3..da7bd2713 100755
--- a/core/modules/wiki.js
+++ b/core/modules/wiki.js
@@ -489,66 +489,6 @@ exports.forEachTiddler = function(/* [options,]callback */) {
 	}
 };
 
-/*
-Return an array of tiddler titles that are directly linked within the given parse tree
- */
-exports.extractLinks = function(parseTreeRoot) {
-	// Count up the links
-	var links = [],
-		checkParseTree = function(parseTree) {
-			for(var t=0; t<parseTree.length; t++) {
-				var parseTreeNode = parseTree[t];
-				if(parseTreeNode.type === "link" && parseTreeNode.attributes.to && parseTreeNode.attributes.to.type === "string") {
-					var value = parseTreeNode.attributes.to.value;
-					if(links.indexOf(value) === -1) {
-						links.push(value);
-					}
-				}
-				if(parseTreeNode.children) {
-					checkParseTree(parseTreeNode.children);
-				}
-			}
-		};
-	checkParseTree(parseTreeRoot);
-	return links;
-};
-
-/*
-Return an array of tiddler titles that are directly linked from the specified tiddler
-*/
-exports.getTiddlerLinks = function(title) {
-	var self = this;
-	// We'll cache the links so they only get computed if the tiddler changes
-	return this.getCacheForTiddler(title,"links",function() {
-		// Parse the tiddler
-		var parser = self.parseTiddler(title);
-		if(parser) {
-			return self.extractLinks(parser.tree);
-		}
-		return [];
-	});
-};
-
-/*
-Return an array of tiddler titles that link to the specified tiddler
-*/
-exports.getTiddlerBacklinks = function(targetTitle) {
-	var self = this,
-		backIndexer = this.getIndexer("BackIndexer"),
-		backlinks = backIndexer && backIndexer.subIndexers.link.lookup(targetTitle);
-
-	if(!backlinks) {
-		backlinks = [];
-		this.forEachTiddler(function(title,tiddler) {
-			var links = self.getTiddlerLinks(title);
-			if(links.indexOf(targetTitle) !== -1) {
-				backlinks.push(title);
-			}
-		});
-	}
-	return backlinks;
-};
-
 /*
 Return a hashmap of tiddler titles that are referenced but not defined. Each value is the number of times the missing tiddler is referenced
 */