Add command to get one or multiple tags by folder and key

Fixes #1, Fixes #2

appinfo/info.xml

@@ -19,5 +19,6 @@
     </dependencies>
     <commands>
 		<command>OCA\GroupfolderTags\Command\Tag</command>
+		<command>OCA\GroupfolderTags\Command\GetTag</command>
     </commands>
-</info>
+</info>

lib/Command/GetTag.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace OCA\GroupfolderTags\Command;
+
+use OCA\GroupfolderTags\Db\Tag;
+use OCP\DB\Exception;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class GetTag extends TagCommand {
+	protected function configure(): void {
+		$this
+			->setName('groupfolder-tags:get')
+			->setDescription('Get single tag value by Groupfolder ID and key. Omit key to get all tags.')
+			->addArgument('folder_id', InputArgument::REQUIRED, 'Groupfolder ID of the tag')
+			->addArgument('key', InputArgument::OPTIONAL, 'Key of the tag');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		$groupFolderId = $input->getArgument('folder_id');
+		$tagKey = $input->getArgument('key');
+
+		if (!$this->getFolder($input, $output)) {
+			return 1;
+		}
+
+		try {
+			$tags = $this->service->findByGroupFolderAndKey($groupFolderId, $tagKey);
+
+			if (empty($tags)) {
+				$output->writeln("<error>Could not find tag for Groupfolder</error>");
+				return 1;
+			}
+
+			if (isset($tagKey)) {
+				/** @var Tag $tag */
+				$tag = current($tags);
+				$output->writeln($tag->getTagValue());
+				return 0;
+			}
+
+			foreach ($tags as $tag) {
+				$output->writeln(json_encode($tag));
+			}
+			return 0;
+		} catch (Exception $e) {
+			$output->writeln("<error>Exception \"{$e->getMessage()}\" at {$e->getFile()} line {$e->getLine()}</error>");
+			return 1;
+		}
+	}
+}

lib/Db/Tag.php

@@ -17,6 +17,15 @@ class Tag extends Entity implements JsonSerializable {
 		$this->addType('lastUpdatedTimestamp','integer');
 	}
 
+	/**
+	 * @return mixed
+	 */
+	public function getTagValue() {
+		return $this->tagValue;
+	}
+
+
+
 	public function jsonSerialize(): array {
 		return [
 			'groupFolderId' => $this->groupFolderId,
@@ -25,4 +34,4 @@ class Tag extends Entity implements JsonSerializable {
 			'lastUpdatedTimestamp' => $this->lastUpdatedTimestamp,
 		];
 	}
-}
+}

lib/Db/TagMapper.php

@@ -5,6 +5,7 @@ namespace OCA\GroupfolderTags\Db;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Db\Entity;
 use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\Exception;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 
@@ -30,7 +31,7 @@ class TagMapper extends QBMapper {
 			->from(self::TABLENAME)
 			->where($qb->expr()->eq('group_folder_id', $qb->createNamedParameter($groupFolderId, IQueryBuilder::PARAM_INT)))
 			->andWhere($qb->expr()->eq('tag_key', $qb->createNamedParameter($tagKey)));
-		
+
 		return $this->findEntity($qb);
 	}
 
@@ -51,7 +52,7 @@ class TagMapper extends QBMapper {
 			->leftJoin('t', self::GROUP_FOLDERS_TABLENAME, 'g', $qb->expr()->andX(
 				$qb->expr()->eq('t.group_folder_id', 'g.id'),
 			));
-		
+
 		return $this->findOneQuery($qb);
 	}
 
@@ -70,7 +71,24 @@ class TagMapper extends QBMapper {
 		if(isset($tagValue)) {
 			$qb->andWhere($qb->expr()->eq('tag_value', $qb->createNamedParameter($tagValue)));
 		}
-		
+
 		return $this->findEntities($qb);
 	}
-}
+
+	/**
+	 * @return Tag[]
+	 * @throws Exception
+	 */
+	public function findByGroupFolderAndKey(string $groupFolderId, ?string $tagKey): array {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from(self::TABLENAME)
+			->where($qb->expr()->eq('group_folder_id', $qb->createNamedParameter($groupFolderId, IQueryBuilder::PARAM_INT)));
+
+		if(isset($tagKey)) {
+			$qb->andWhere($qb->expr()->eq('tag_key', $qb->createNamedParameter($tagKey)));
+		}
+
+		return $this->findEntities($qb);
+	}
+}

lib/Service/TagService.php

@@ -70,4 +70,12 @@ class TagService {
 			$this->handleException($e);
 		}
 	}
-}
+
+	/**
+	 * @return Tag[]
+	 * @throws \OCP\DB\Exception
+	 */
+	public function findByGroupFolderAndKey(int $groupFolderId, ?string $key): array {
+		return $this->mapper->findByGroupFolderAndKey($groupFolderId, $key);
+	}
+}