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Editing: GlobalStoragesService.php

<?php

/**
 * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-only
 */
namespace OCA\Files_External\Service;

use OC\Files\Filesystem;
use OCA\Files_External\Event\StorageCreatedEvent;
use OCA\Files_External\Event\StorageDeletedEvent;
use OCA\Files_External\Event\StorageUpdatedEvent;
use OCA\Files_External\Lib\StorageConfig;
use OCA\Files_External\MountConfig;
use OCP\IGroup;

/**
 * Service class to manage global external storage
 */
class GlobalStoragesService extends StoragesService {
	/**
	 * Triggers $signal for all applicable users of the given
	 * storage
	 *
	 * @param StorageConfig $storage storage data
	 * @param string $signal signal to trigger
	 */
	protected function triggerHooks(StorageConfig $storage, $signal) {
		// FIXME: Use as expression in empty once PHP 5.4 support is dropped
		$applicableUsers = $storage->getApplicableUsers();
		$applicableGroups = $storage->getApplicableGroups();
		if (empty($applicableUsers) && empty($applicableGroups)) {
			// raise for user "all"
			$this->triggerApplicableHooks(
				$signal,
				$storage->getMountPoint(),
				MountConfig::MOUNT_TYPE_USER,
				['all']
			);
			return;
		}

$this->triggerApplicableHooks(
			$signal,
			$storage->getMountPoint(),
			MountConfig::MOUNT_TYPE_USER,
			$applicableUsers
		);
		$this->triggerApplicableHooks(
			$signal,
			$storage->getMountPoint(),
			MountConfig::MOUNT_TYPE_GROUP,
			$applicableGroups
		);
	}

/**
	 * Triggers signal_create_mount or signal_delete_mount to
	 * accommodate for additions/deletions in applicableUsers
	 * and applicableGroups fields.
	 *
	 * @param StorageConfig $oldStorage old storage config
	 * @param StorageConfig $newStorage new storage config
	 */
	protected function triggerChangeHooks(StorageConfig $oldStorage, StorageConfig $newStorage) {
		// if mount point changed, it's like a deletion + creation
		if ($oldStorage->getMountPoint() !== $newStorage->getMountPoint()) {
			$this->eventDispatcher->dispatchTyped(new StorageDeletedEvent($oldStorage));
			$this->eventDispatcher->dispatchTyped(new StorageCreatedEvent($newStorage));
			$this->triggerHooks($oldStorage, Filesystem::signal_delete_mount);
			$this->triggerHooks($newStorage, Filesystem::signal_create_mount);
			return;
		} else {
			$this->eventDispatcher->dispatchTyped(new StorageUpdatedEvent($oldStorage, $newStorage));
		}

$userAdditions = array_diff($newStorage->getApplicableUsers(), $oldStorage->getApplicableUsers());
		$userDeletions = array_diff($oldStorage->getApplicableUsers(), $newStorage->getApplicableUsers());
		$groupAdditions = array_diff($newStorage->getApplicableGroups(), $oldStorage->getApplicableGroups());
		$groupDeletions = array_diff($oldStorage->getApplicableGroups(), $newStorage->getApplicableGroups());

// FIXME: Use as expression in empty once PHP 5.4 support is dropped
		// if no applicable were set, raise a signal for "all"
		$oldApplicableUsers = $oldStorage->getApplicableUsers();
		$oldApplicableGroups = $oldStorage->getApplicableGroups();
		if (empty($oldApplicableUsers) && empty($oldApplicableGroups)) {
			$this->triggerApplicableHooks(
				Filesystem::signal_delete_mount,
				$oldStorage->getMountPoint(),
				MountConfig::MOUNT_TYPE_USER,
				['all']
			);
		}

// trigger delete for removed users
		$this->triggerApplicableHooks(
			Filesystem::signal_delete_mount,
			$oldStorage->getMountPoint(),
			MountConfig::MOUNT_TYPE_USER,
			$userDeletions
		);

// trigger delete for removed groups
		$this->triggerApplicableHooks(
			Filesystem::signal_delete_mount,
			$oldStorage->getMountPoint(),
			MountConfig::MOUNT_TYPE_GROUP,
			$groupDeletions
		);

// and now add the new users
		$this->triggerApplicableHooks(
			Filesystem::signal_create_mount,
			$newStorage->getMountPoint(),
			MountConfig::MOUNT_TYPE_USER,
			$userAdditions
		);

// and now add the new groups
		$this->triggerApplicableHooks(
			Filesystem::signal_create_mount,
			$newStorage->getMountPoint(),
			MountConfig::MOUNT_TYPE_GROUP,
			$groupAdditions
		);

// FIXME: Use as expression in empty once PHP 5.4 support is dropped
		// if no applicable, raise a signal for "all"
		$newApplicableUsers = $newStorage->getApplicableUsers();
		$newApplicableGroups = $newStorage->getApplicableGroups();
		if (empty($newApplicableUsers) && empty($newApplicableGroups)) {
			$this->triggerApplicableHooks(
				Filesystem::signal_create_mount,
				$newStorage->getMountPoint(),
				MountConfig::MOUNT_TYPE_USER,
				['all']
			);
		}
	}

/**
	 * Get the visibility type for this controller, used in validation
	 *
	 * @return int BackendService::VISIBILITY_* constants
	 */
	public function getVisibilityType() {
		return BackendService::VISIBILITY_ADMIN;
	}

protected function isApplicable(StorageConfig $config) {
		return true;
	}

/**
	 * Get all configured admin and personal mounts
	 *
	 * @return StorageConfig[] map of storage id to storage config
	 */
	public function getStorageForAllUsers() {
		$mounts = $this->dbConfig->getAllMounts();
		$configs = array_map([$this, 'getStorageConfigFromDBMount'], $mounts);
		$configs = array_filter($configs, function ($config) {
			return $config instanceof StorageConfig;
		});

$keys = array_map(function (StorageConfig $config) {
			return $config->getId();
		}, $configs);

return array_combine($keys, $configs);
	}

/**
	 * Gets all storages for the group, not including any global storages
	 * @return StorageConfig[]
	 */
	public function getAllStoragesForGroup(IGroup $group): array {
		$mounts = $this->dbConfig->getMountsForGroups([$group->getGID()]);
		$configs = array_map($this->getStorageConfigFromDBMount(...), $mounts);
		$configs = array_filter($configs, static fn (?StorageConfig $config): bool => $config instanceof StorageConfig);
		$keys = array_map(static fn (StorageConfig $config) => $config->getId(), $configs);

$storages = array_combine($keys, $configs);
		return array_filter($storages, $this->validateStorage(...));
	}

/**
	 * @return StorageConfig[]
	 */
	public function getAllGlobalStorages(): array {
		$mounts = $this->dbConfig->getGlobalMounts();

$configs = array_map($this->getStorageConfigFromDBMount(...), $mounts);
		$configs = array_filter($configs, static fn (?StorageConfig $config): bool => $config instanceof StorageConfig);
		$keys = array_map(static fn (StorageConfig $config) => $config->getId(), $configs);
		$storages = array_combine($keys, $configs);
		return array_filter($storages, $this->validateStorage(...));
	}
}

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