[plugin][search][content] give priority on result when title is match…

…ed (#20197)

* [plugin][search][content] give priority on result when title is matched

* Missed comma

* Add relevance weighting according to number of words

* Relevance by number of words in title only, removed introtext relevance

* Fix order string concatenation

plugins/search/content/content.php

@@ -91,6 +91,8 @@ public function onContentSearch($text, $phrase = '', $ordering = '', $areas = nu
 				$wheres2[] = 'a.metakey LIKE ' . $text;
 				$wheres2[] = 'a.metadesc LIKE ' . $text;
 
+				$relevance[] = ' CASE WHEN ' . $wheres2[0] . ' THEN 5 ELSE 0 END ';
+
 				// Join over Fields.
 				$subQuery = $db->getQuery(true);
 				$subQuery->select("cfv.item_id")
@@ -146,6 +148,8 @@ public function onContentSearch($text, $phrase = '', $ordering = '', $areas = nu
 					$wheres2[] = 'LOWER(a.metakey) LIKE LOWER(' . $word . ')';
 					$wheres2[] = 'LOWER(a.metadesc) LIKE LOWER(' . $word . ')';
 
+					$relevance[] = ' CASE WHEN ' . $wheres2[0] . ' THEN 5 ELSE 0 END ';
+
 					if ($phrase === 'all')
 					{
 						// Join over Fields.
@@ -274,6 +278,12 @@ public function onContentSearch($text, $phrase = '', $ordering = '', $areas = nu
 			$case_when1 .= ' ELSE ';
 			$case_when1 .= $c_id . ' END as catslug';
 
+			if (!empty($relevance))
+			{
+				$query->select(implode(' + ', $relevance) . ' AS relevance');
+				$order = ' relevance DESC, ' . $order;
+			}
+
 			$query->select('a.title AS title, a.metadesc, a.metakey, a.created AS created, a.language, a.catid')
 				->select($query->concatenate(array('a.introtext', 'a.fulltext')) . ' AS text')
 				->select('c.title AS section, ' . $case_when . ',' . $case_when1 . ', ' . '\'2\' AS browsernav')
@@ -342,6 +352,12 @@ public function onContentSearch($text, $phrase = '', $ordering = '', $areas = nu
 			$case_when1 .= ' ELSE ';
 			$case_when1 .= $c_id . ' END as catslug';
 
+			if (!empty($relevance))
+			{
+				$query->select(implode(' + ', $relevance) . ' AS relevance');
+				$order = ' relevance DESC, ' . $order;
+			}
+
 			$query->select(
 				'a.title AS title, a.metadesc, a.metakey, a.created AS created, '
 				. $query->concatenate(array('a.introtext', 'a.fulltext')) . ' AS text,'