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45 lines
1.6 KiB
PHP
45 lines
1.6 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OCP\Activity;
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/**
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* Interface EventMerger
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*
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* @since 11.0
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*/
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interface IEventMerger {
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/**
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* Combines two events when possible to have grouping:
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*
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* Example1: Two events with subject '{user} created {file}' and
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* $mergeParameter file with different file and same user will be merged
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* to '{user} created {file1} and {file2}' and the childEvent on the return
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* will be set, if the events have been merged.
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*
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* Example2: Two events with subject '{user} created {file}' and
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* $mergeParameter file with same file and same user will be merged to
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* '{user} created {file1}' and the childEvent on the return will be set, if
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* the events have been merged.
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*
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* The following requirements have to be met, in order to be merged:
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* - Both events need to have the same `getApp()`
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* - Both events must not have a message `getMessage()`
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* - Both events need to have the same subject `getSubject()`
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* - Both events need to have the same object type `getObjectType()`
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* - The time difference between both events must not be bigger then 3 hours
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* - Only up to 5 events can be merged.
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* - All parameters apart from such starting with $mergeParameter must be
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* the same for both events.
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*
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* @param string $mergeParameter
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* @param IEvent $event
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* @param IEvent|null $previousEvent
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* @return IEvent
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* @since 11.0
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*/
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public function mergeEvents($mergeParameter, IEvent $event, ?IEvent $previousEvent = null);
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}
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