feat(systemtags): Add methods to directly do "Generated by AI" tag

lib/private/SystemTag/SystemTagManager.php

@@ -150,6 +150,15 @@ public function getTag(string $tagName, bool $userVisible, bool $userAssignable)
 		return $this->createSystemTagFromRow($row);
 	}
 
+	#[\Override]
+	public function getGeneratedByAITag(): ISystemTag {
+		try {
+			return $this->getTag(ISystemTag::GENERATED_BY_AI, true, true);
+		} catch (TagNotFoundException) {
+			return $this->createTag(ISystemTag::GENERATED_BY_AI, true, true);
+		}
+	}
+
 	public function createTag(string $tagName, bool $userVisible, bool $userAssignable): ISystemTag {
 		$user = $this->userSession->getUser();
 		if (!$this->canUserCreateTag($user)) {

lib/private/SystemTag/SystemTagObjectMapper.php

@@ -176,6 +176,12 @@ public function assignTags(string $objId, string $objectType, $tagIds): void {
 		$this->dispatcher->dispatchTyped(new TagAssignedEvent($objectType, [$objId], $tagsAssigned));
 	}
 
+	#[Override]
+	public function assignGeneratedByAITag(string $objId, string $objectType) {
+		$tag = $this->tagManager->getGeneratedByAITag();
+		$this->assignTags($objId, $objectType, [$tag->getId()]);
+	}
+
 	#[Override]
 	public function unassignTags(string $objId, string $objectType, $tagIds): void {
 		if (!\is_array($tagIds)) {

lib/public/SystemTag/ISystemTag.php

@@ -36,6 +36,11 @@ interface ISystemTag {
 		ISystemTag::ACCESS_LEVEL_INVISIBLE => 'invisible',
 	];
 
+	/**
+	 * @since 34.0.0
+	 */
+	public const GENERATED_BY_AI = 'Generated by AI';
+
 	/**
 	 * Returns the tag id
 	 *

lib/public/SystemTag/ISystemTagManager.php

@@ -47,6 +47,14 @@ public function getTagsByIds($tagIds, ?IUser $user = null): array;
 	 */
 	public function getTag(string $tagName, bool $userVisible, bool $userAssignable): ISystemTag;
 
+	/**
+	 * Returns the tag object to mark AI generated content with
+	 *
+	 * @return ISystemTag system tag
+	 * @since 34.0.0
+	 */
+	public function getGeneratedByAITag(): ISystemTag;
+
 	/**
 	 * Creates the tag object using the given attributes.
 	 *

lib/public/SystemTag/ISystemTagObjectMapper.php

@@ -81,6 +81,15 @@ public function getObjectIdsForTags($tagIds, string $objectType, int $limit = 0,
 	 */
 	public function assignTags(string $objId, string $objectType, $tagIds);
 
+	/**
+	 * Assign the "Generated by AI" tag to the given object.
+	 *
+	 * @param string $objId object id
+	 * @param string $objectType object type
+	 * @since 34.0.0
+	 */
+	public function assignGeneratedByAITag(string $objId, string $objectType);
+
 	/**
 	 * Unassign the given tags from the given object.
 	 *