From 7fd2dd5a3eb1d1dfad9716cc6c75202558c392e9 Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Wed, 19 Jul 2023 21:52:28 +0100
Subject: [PATCH] Wire up the tag indexer properly

Improves rendering performance by a factor of 4, but we're still 5 times slower than the plain JS store
---
 .../tiddlywiki/sqlite3store/sql-wiki-store.js | 24 ++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/plugins/tiddlywiki/sqlite3store/sql-wiki-store.js b/plugins/tiddlywiki/sqlite3store/sql-wiki-store.js
index edfdf7087..6938028b4 100644
--- a/plugins/tiddlywiki/sqlite3store/sql-wiki-store.js
+++ b/plugins/tiddlywiki/sqlite3store/sql-wiki-store.js
@@ -81,8 +81,14 @@ $tw.Wiki = function(options) {
 		self.sqlFunctions.sqlLogTables();
 	}
 
+	var tagIndexer;
+
 	this.addIndexer = function(indexer,name) {
-		return;
+		switch(indexer.constructor.name) {
+			case "TagIndexer":
+				tagIndexer = new TagIndexer(this);
+				break;
+		}
 	};
 
 	function TagSubIndexer(indexer,iteratorMethod) {
@@ -90,6 +96,13 @@ $tw.Wiki = function(options) {
 		this.iteratorMethod = iteratorMethod;
 	}
 
+	TagSubIndexer.prototype.addIndexMethod = function() {
+		var self = this;
+		this.indexer.wiki[this.iteratorMethod].byTag = function(tag) {
+			return self.lookup(tag).slice(0);
+		};
+	};
+
 	TagSubIndexer.prototype.lookup = function(tag) {
 		return self.sqlFunctions.sqlGetTiddlersWithTag(tag,this.iteratorMethod);
 	};
@@ -102,10 +115,11 @@ $tw.Wiki = function(options) {
 			new TagSubIndexer(this,"eachTiddlerPlusShadows"),
 			new TagSubIndexer(this,"eachShadowPlusTiddlers")
 		];
+		$tw.utils.each(this.subIndexers,function(subIndexer) {
+			subIndexer.addIndexMethod();
+		});
 	}
 
-	var tagIndexer = new TagIndexer();
-
 	this.getIndexer = function(name) {
 		switch(name) {
 			case "TagIndexer":
@@ -327,6 +341,10 @@ $tw.Wiki = function(options) {
 		this.clearCache(null);
 		this.clearGlobalCache();
 	};
+
+	if(this.addIndexersToWiki) {
+		this.addIndexersToWiki();
+	}
 };
 
 })();