Added tag siblings to API

src/Controllers/TagController.php

@@ -35,6 +35,7 @@ final class TagController extends AbstractController
 	{
 		$router->get('/api/tags', [$this, 'getTags']);
 		$router->get('/api/tags/:tagName', [$this, 'getTag']);
+		$router->get('/api/tags/:tagName/siblings', [$this, 'getTagSiblings']);
 		$router->put('/api/tags/:tagName', [$this, 'updateTag']);
 	}
 
@@ -61,6 +62,17 @@ final class TagController extends AbstractController
 			'totalRecords' => $result->getTotalRecords()];
 	}
 
+	public function getTagSiblings($tagName)
+	{
+		$this->privilegeService->assertPrivilege(Privilege::LIST_TAGS);
+		$tag = $this->tagService->getByName($tagName);
+		$result = $this->tagService->getSiblings($tagName);
+		$entities = $this->tagViewProxy->fromArray($result);
+		return [
+			'data' => $entities,
+		];
+	}
+
 	public function updateTag($tagName)
 	{
 		$tag = $this->tagService->getByName($tagName);

src/Dao/TagDao.php

@@ -39,6 +39,23 @@ class TagDao extends AbstractDao implements ICrudDao
 		return $this->arrayToEntities($arrayEntities);
 	}
 
+	public function findSiblings($tagName)
+	{
+		$tag = $this->findByName($tagName);
+		if (!$tag)
+			return [];
+		$tagId = $tag->getId();
+		$query = $this->fpdo->from($this->tableName)
+			->disableSmartJoin()
+			->innerJoin('postTags pt1 ON pt1.tagId = tags.id')
+			->innerJoin('postTags pt2 ON pt2.postId = pt1.postId')
+			->where('pt2.tagId = ?', $tagId)
+			->groupBy('tags.id')
+			->orderBy('tags.usages DESC, name ASC');
+		$arrayEntities = iterator_to_array($query);
+		return $this->arrayToEntities($arrayEntities);
+	}
+
 	public function deleteUnused()
 	{
 		$this->deleteBy('usages', 0);

src/Services/TagService.php

@@ -59,6 +59,15 @@ class TagService
 		return $this->transactionManager->rollback($transactionFunc);
 	}
 
+	public function getSiblings($tagName)
+	{
+		$transactionFunc = function() use ($tagName)
+		{
+			return $this->tagDao->findSiblings($tagName);
+		};
+		return $this->transactionManager->rollback($transactionFunc);
+	}
+
 	public function exportJson()
 	{
 		$tags = [];

src/Upgrades/Upgrade20.php

@@ -0,0 +1,12 @@
+<?php
+namespace Szurubooru\Upgrades;
+use Szurubooru\DatabaseConnection;
+
+class Upgrade20 implements IUpgrade
+{
+	public function run(DatabaseConnection $databaseConnection)
+	{
+		$pdo = $databaseConnection->getPDO();
+		$pdo->exec('CREATE INDEX idx_postTags_tagId ON postTags(tagId)');
+	}
+}

src/di.php

@@ -35,6 +35,7 @@ return [
 			$container->get(\Szurubooru\Upgrades\Upgrade17::class),
 			$container->get(\Szurubooru\Upgrades\Upgrade18::class),
 			$container->get(\Szurubooru\Upgrades\Upgrade19::class),
+			$container->get(\Szurubooru\Upgrades\Upgrade20::class),
 		];
 	}),