Added tag filtering by category

src/Dao/TagDao.php

@@ -158,6 +158,13 @@ class TagDao extends AbstractDao implements ICrudDao
 			return;
 		}
 
+		elseif ($requirement->getType() === TagFilter::REQUIREMENT_CATEGORY)
+		{
+			$sql = 'IFNULL(category, \'default\') = ?';
+			$requirement->setType($sql);
+			return parent::decorateQueryFromRequirement($query, $requirement);
+		}
+
 		parent::decorateQueryFromRequirement($query, $requirement);
 	}
 

src/SearchServices/Filters/TagFilter.php

@@ -9,6 +9,7 @@ class TagFilter extends BasicFilter implements IFilter
 	const ORDER_USAGE_COUNT = 'usages';
 
 	const REQUIREMENT_PARTIAL_TAG_NAME = 'partialTagName';
+	const REQUIREMENT_CATEGORY = 'category';
 
 	public function __construct()
 	{

src/SearchServices/Parsers/TagSearchParser.php

@@ -26,6 +26,16 @@ class TagSearchParser extends AbstractSearchParser
 
 	protected function decorateFilterFromNamedToken(IFilter $filter, NamedSearchToken $namedToken)
 	{
+		if ($namedToken->getKey() === 'category')
+		{
+			$this->addRequirementFromToken(
+				$filter,
+				$namedToken,
+				TagFilter::REQUIREMENT_CATEGORY,
+				self::ALLOW_COMPOSITE);
+		}
+
+		else
 			throw new NotSupportedException();
 	}
 

tests/Dao/TagDaoFilterTest.php

@@ -0,0 +1,49 @@
+<?php
+namespace Szurubooru\Tests\Dao;
+use Szurubooru\Dao\TagDao;
+use Szurubooru\Entities\Tag;
+use Szurubooru\SearchServices\Filters\TagFilter;
+use Szurubooru\SearchServices\Requirements\Requirement;
+use Szurubooru\SearchServices\Requirements\RequirementSingleValue;
+use Szurubooru\SearchServices\Result;
+use Szurubooru\Tests\AbstractDatabaseTestCase;
+
+final class TagDaoFilterTest extends AbstractDatabaseTestCase
+{
+	public function testCategories()
+	{
+		$tag1 = $this->getTestTag('test 1');
+		$tag2 = $this->getTestTag('test 2');
+		$tag3 = $this->getTestTag('test 3');
+		$tag1->setCategory(null);
+		$tag2->setCategory('misc');
+		$tag3->setCategory('other');
+		$tagDao = $this->getTagDao();
+		$tagDao->save($tag1);
+		$tagDao->save($tag2);
+		$tagDao->save($tag3);
+
+		$searchFilter = new TagFilter();
+		$requirement = new Requirement();
+		$requirement->setType(TagFilter::REQUIREMENT_CATEGORY);
+		$requirement->setValue(new RequirementSingleValue('misc'));
+		$requirement->setNegated(true);
+		$searchFilter->addRequirement($requirement);
+		$result = $tagDao->findFiltered($searchFilter);
+		$this->assertEquals(2, $result->getTotalRecords());
+		$this->assertEntitiesEqual([$tag3, $tag1], array_values($result->getEntities()));
+	}
+
+	private function getTagDao()
+	{
+		return new TagDao($this->databaseConnection);
+	}
+
+	private function getTestTag($name)
+	{
+		$tag = new Tag();
+		$tag->setName($name);
+		$tag->setCreationTime(date('c'));
+		return $tag;
+	}
+}