Adds the ThanksQueryHelper service

Bug: T325094
Change-Id: I3a14d255546c12655dc4492194a07b0d205f0534

ServiceWiring.php

@@ -0,0 +1,15 @@
+<?php
+
+use MediaWiki\Extension\Thanks\ThanksQueryHelper;
+use MediaWiki\MediaWikiServices;
+
+return [
+	'ThanksQueryHelper' => static function (
+			MediaWikiServices $services
+		): ThanksQueryHelper {
+			return new ThanksQueryHelper(
+				$services->getTitleFactory(),
+				$services->getDBLoadBalancer()
+			);
+	},
+];

extension.json

@@ -180,6 +180,9 @@
 		"LogEventsListLineEnding": "MediaWiki\\Extension\\Thanks\\Hooks::onLogEventsListLineEnding",
 		"PageHistoryBeforeList": "MediaWiki\\Extension\\Thanks\\Hooks::onPageHistoryBeforeList"
 	},
+	"ServiceWiringFiles": [
+		"ServiceWiring.php"
+	],
 	"config": {
 		"ThanksSendToBots": {
 			"value": false

includes/ThanksQueryHelper.php

@@ -0,0 +1,59 @@
+<?php
+namespace MediaWiki\Extension\Thanks;
+
+use DBAccessObjectUtils;
+use IDBAccessObject;
+use MediaWiki\Title\TitleFactory;
+use MediaWiki\User\UserIdentity;
+use Wikimedia\Rdbms\ILoadBalancer;
+
+/**
+ * Query module
+ */
+class ThanksQueryHelper {
+	/** @var TitleFactory */
+	private TitleFactory $titleFactory;
+	/** @var ILoadBalancer */
+	private ILoadBalancer $loadBalancer;
+
+	public function __construct( TitleFactory $titleFactory, ILoadBalancer $loadBalancer ) {
+		$this->titleFactory = $titleFactory;
+		$this->loadBalancer = $loadBalancer;
+	}
+
+	/**
+	 * Counts number of thanks a user has received. The query is not cached.
+	 *
+	 * @param UserIdentity $userIdentity
+	 * @param int $limit cap the value of counts queried for performance
+	 * @param int $flags database options. If calling in a POST context where a user is being thanked, the
+	 *  return value will be incorrect if returned from replica. This allows you to query primary if the
+	 *  exact number is important.
+	 * @return int Number of thanks received for the user ID
+	 */
+	public function getThanksReceivedCount(
+		UserIdentity $userIdentity,
+		int $limit = 1000,
+		int $flags = IDBAccessObject::READ_NORMAL
+	): int {
+		$loadBalancer = $this->loadBalancer;
+		list( $index, $options ) = DBAccessObjectUtils::getDBOptions( $flags );
+		$db = $loadBalancer->getConnection( $index );
+		$userPage = $this->titleFactory->newFromText( $userIdentity->getName(), NS_USER );
+		$logTitle = $userPage->getDBkey();
+		return $db->newSelectQueryBuilder()
+			->table( 'logging' )
+			->field( '1' )
+			// There is no type + target index, but there's a target index (log_page_time)
+			// and it's unlikely the user's page has many other log events than thanks,
+			// so the query should be okay.
+			->conds( [
+				'log_type' => 'thanks',
+				'log_action' => 'thank',
+				'log_namespace' => NS_USER,
+				'log_title' => $logTitle,
+			] )
+			->limit( $limit )
+			->fetchRowCount();
+	}
+}