nextcloud / server

apps/dav/lib/CardDAV/Activity/Backend.php

Indentation +465 added lines, -465 removed lines

@@ -39,469 +39,469 @@
 
 class Backend {
 
-	/** @var IActivityManager */
-	protected $activityManager;
-
-	/** @var IGroupManager */
-	protected $groupManager;
-
-	/** @var IUserSession */
-	protected $userSession;
-
-	/** @var IAppManager */
-	protected $appManager;
-
-	/** @var IUserManager */
-	protected $userManager;
-
-	public function __construct(IActivityManager $activityManager,
-								IGroupManager $groupManager,
-								IUserSession $userSession,
-								IAppManager $appManager,
-								IUserManager $userManager) {
-		$this->activityManager = $activityManager;
-		$this->groupManager = $groupManager;
-		$this->userSession = $userSession;
-		$this->appManager = $appManager;
-		$this->userManager = $userManager;
-	}
-
-	/**
-	 * Creates activities when an addressbook was creates
-	 *
-	 * @param array $addressbookData
-	 */
-	public function onAddressbookCreate(array $addressbookData): void {
-		$this->triggerAddressbookActivity(Addressbook::SUBJECT_ADD, $addressbookData);
-	}
-
-	/**
-	 * Creates activities when a calendar was updated
-	 *
-	 * @param array $addressbookData
-	 * @param array $shares
-	 * @param array $properties
-	 */
-	public function onAddressbookUpdate(array $addressbookData, array $shares, array $properties): void {
-		$this->triggerAddressbookActivity(Addressbook::SUBJECT_UPDATE, $addressbookData, $shares, $properties);
-	}
-
-	/**
-	 * Creates activities when a calendar was deleted
-	 *
-	 * @param array $addressbookData
-	 * @param array $shares
-	 */
-	public function onAddressbookDelete(array $addressbookData, array $shares): void {
-		$this->triggerAddressbookActivity(Addressbook::SUBJECT_DELETE, $addressbookData, $shares);
-	}
-
-	/**
-	 * Creates activities for all related users when a calendar was touched
-	 *
-	 * @param string $action
-	 * @param array $addressbookData
-	 * @param array $shares
-	 * @param array $changedProperties
-	 */
-	protected function triggerAddressbookActivity(string $action, array $addressbookData, array $shares = [], array $changedProperties = []): void {
-		if (!isset($addressbookData['principaluri'])) {
-			return;
-		}
-
-		$principalUri = $addressbookData['principaluri'];
-
-		// We are not interested in changes from the system addressbook
-		if ($principalUri === 'principals/system/system') {
-			return;
-		}
-
-		$principal = explode('/', $principalUri);
-		$owner = array_pop($principal);
-
-		$currentUser = $this->userSession->getUser();
-		if ($currentUser instanceof IUser) {
-			$currentUser = $currentUser->getUID();
-		} else {
-			$currentUser = $owner;
-		}
-
-		$event = $this->activityManager->generateEvent();
-		$event->setApp('dav')
-			->setObject('addressbook', (int) $addressbookData['id'])
-			->setType('contacts')
-			->setAuthor($currentUser);
-
-		$changedVisibleInformation = array_intersect([
-			'{DAV:}displayname',
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description',
-		], array_keys($changedProperties));
-
-		if (empty($shares) || ($action === Addressbook::SUBJECT_UPDATE && empty($changedVisibleInformation))) {
-			$users = [$owner];
-		} else {
-			$users = $this->getUsersForShares($shares);
-			$users[] = $owner;
-		}
-
-		foreach ($users as $user) {
-			if ($action === Addressbook::SUBJECT_DELETE && !$this->userManager->userExists($user)) {
-				// Avoid creating addressbook_delete activities for deleted users
-				continue;
-			}
-
-			$event->setAffectedUser($user)
-				->setSubject(
-					$user === $currentUser ? $action . '_self' : $action,
-					[
-						'actor' => $currentUser,
-						'addressbook' => [
-							'id' => (int) $addressbookData['id'],
-							'uri' => $addressbookData['uri'],
-							'name' => $addressbookData['{DAV:}displayname'],
-						],
-					]
-				);
-			$this->activityManager->publish($event);
-		}
-	}
-
-	/**
-	 * Creates activities for all related users when an addressbook was (un-)shared
-	 *
-	 * @param array $addressbookData
-	 * @param array $shares
-	 * @param array $add
-	 * @param array $remove
-	 */
-	public function onAddressbookUpdateShares(array $addressbookData, array $shares, array $add, array $remove): void {
-		$principal = explode('/', $addressbookData['principaluri']);
-		$owner = $principal[2];
-
-		$currentUser = $this->userSession->getUser();
-		if ($currentUser instanceof IUser) {
-			$currentUser = $currentUser->getUID();
-		} else {
-			$currentUser = $owner;
-		}
-
-		$event = $this->activityManager->generateEvent();
-		$event->setApp('dav')
-			->setObject('addressbook', (int) $addressbookData['id'])
-			->setType('contacts')
-			->setAuthor($currentUser);
-
-		foreach ($remove as $principal) {
-			// principal:principals/users/test
-			$parts = explode(':', $principal, 2);
-			if ($parts[0] !== 'principal') {
-				continue;
-			}
-			$principal = explode('/', $parts[1]);
-
-			if ($principal[1] === 'users') {
-				$this->triggerActivityUser(
-					$principal[2],
-					$event,
-					$addressbookData,
-					Addressbook::SUBJECT_UNSHARE_USER,
-					Addressbook::SUBJECT_DELETE . '_self'
-				);
-
-				if ($owner !== $principal[2]) {
-					$parameters = [
-						'actor' => $event->getAuthor(),
-						'addressbook' => [
-							'id' => (int) $addressbookData['id'],
-							'uri' => $addressbookData['uri'],
-							'name' => $addressbookData['{DAV:}displayname'],
-						],
-						'user' => $principal[2],
-					];
-
-					if ($owner === $event->getAuthor()) {
-						$subject = Addressbook::SUBJECT_UNSHARE_USER . '_you';
-					} elseif ($principal[2] === $event->getAuthor()) {
-						$subject = Addressbook::SUBJECT_UNSHARE_USER . '_self';
-					} else {
-						$event->setAffectedUser($event->getAuthor())
-							->setSubject(Addressbook::SUBJECT_UNSHARE_USER . '_you', $parameters);
-						$this->activityManager->publish($event);
-
-						$subject = Addressbook::SUBJECT_UNSHARE_USER . '_by';
-					}
-
-					$event->setAffectedUser($owner)
-						->setSubject($subject, $parameters);
-					$this->activityManager->publish($event);
-				}
-			} elseif ($principal[1] === 'groups') {
-				$this->triggerActivityGroup($principal[2], $event, $addressbookData, Addressbook::SUBJECT_UNSHARE_USER);
-
-				$parameters = [
-					'actor' => $event->getAuthor(),
-					'addressbook' => [
-						'id' => (int) $addressbookData['id'],
-						'uri' => $addressbookData['uri'],
-						'name' => $addressbookData['{DAV:}displayname'],
-					],
-					'group' => $principal[2],
-				];
-
-				if ($owner === $event->getAuthor()) {
-					$subject = Addressbook::SUBJECT_UNSHARE_GROUP . '_you';
-				} else {
-					$event->setAffectedUser($event->getAuthor())
-						->setSubject(Addressbook::SUBJECT_UNSHARE_GROUP . '_you', $parameters);
-					$this->activityManager->publish($event);
-
-					$subject = Addressbook::SUBJECT_UNSHARE_GROUP . '_by';
-				}
-
-				$event->setAffectedUser($owner)
-					->setSubject($subject, $parameters);
-				$this->activityManager->publish($event);
-			}
-		}
-
-		foreach ($add as $share) {
-			if ($this->isAlreadyShared($share['href'], $shares)) {
-				continue;
-			}
-
-			// principal:principals/users/test
-			$parts = explode(':', $share['href'], 2);
-			if ($parts[0] !== 'principal') {
-				continue;
-			}
-			$principal = explode('/', $parts[1]);
-
-			if ($principal[1] === 'users') {
-				$this->triggerActivityUser($principal[2], $event, $addressbookData, Addressbook::SUBJECT_SHARE_USER);
-
-				if ($owner !== $principal[2]) {
-					$parameters = [
-						'actor' => $event->getAuthor(),
-						'addressbook' => [
-							'id' => (int) $addressbookData['id'],
-							'uri' => $addressbookData['uri'],
-							'name' => $addressbookData['{DAV:}displayname'],
-						],
-						'user' => $principal[2],
-					];
-
-					if ($owner === $event->getAuthor()) {
-						$subject = Addressbook::SUBJECT_SHARE_USER . '_you';
-					} else {
-						$event->setAffectedUser($event->getAuthor())
-							->setSubject(Addressbook::SUBJECT_SHARE_USER . '_you', $parameters);
-						$this->activityManager->publish($event);
-
-						$subject = Addressbook::SUBJECT_SHARE_USER . '_by';
-					}
-
-					$event->setAffectedUser($owner)
-						->setSubject($subject, $parameters);
-					$this->activityManager->publish($event);
-				}
-			} elseif ($principal[1] === 'groups') {
-				$this->triggerActivityGroup($principal[2], $event, $addressbookData, Addressbook::SUBJECT_SHARE_USER);
-
-				$parameters = [
-					'actor' => $event->getAuthor(),
-					'addressbook' => [
-						'id' => (int) $addressbookData['id'],
-						'uri' => $addressbookData['uri'],
-						'name' => $addressbookData['{DAV:}displayname'],
-					],
-					'group' => $principal[2],
-				];
-
-				if ($owner === $event->getAuthor()) {
-					$subject = Addressbook::SUBJECT_SHARE_GROUP . '_you';
-				} else {
-					$event->setAffectedUser($event->getAuthor())
-						->setSubject(Addressbook::SUBJECT_SHARE_GROUP . '_you', $parameters);
-					$this->activityManager->publish($event);
-
-					$subject = Addressbook::SUBJECT_SHARE_GROUP . '_by';
-				}
-
-				$event->setAffectedUser($owner)
-					->setSubject($subject, $parameters);
-				$this->activityManager->publish($event);
-			}
-		}
-	}
-
-	/**
-	 * Checks if a calendar is already shared with a principal
-	 *
-	 * @param string $principal
-	 * @param array[] $shares
-	 * @return bool
-	 */
-	protected function isAlreadyShared(string $principal, array $shares): bool {
-		foreach ($shares as $share) {
-			if ($principal === $share['href']) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Creates the given activity for all members of the given group
-	 *
-	 * @param string $gid
-	 * @param IEvent $event
-	 * @param array $properties
-	 * @param string $subject
-	 */
-	protected function triggerActivityGroup(string $gid, IEvent $event, array $properties, string $subject): void {
-		$group = $this->groupManager->get($gid);
-
-		if ($group instanceof IGroup) {
-			foreach ($group->getUsers() as $user) {
-				// Exclude current user
-				if ($user->getUID() !== $event->getAuthor()) {
-					$this->triggerActivityUser($user->getUID(), $event, $properties, $subject);
-				}
-			}
-		}
-	}
-
-	/**
-	 * Creates the given activity for the given user
-	 *
-	 * @param string $user
-	 * @param IEvent $event
-	 * @param array $properties
-	 * @param string $subject
-	 * @param string $subjectSelf
-	 */
-	protected function triggerActivityUser(string $user, IEvent $event, array $properties, string $subject, string $subjectSelf = ''): void {
-		$event->setAffectedUser($user)
-			->setSubject(
-				$user === $event->getAuthor() && $subjectSelf ? $subjectSelf : $subject,
-				[
-					'actor' => $event->getAuthor(),
-					'addressbook' => [
-						'id' => (int) $properties['id'],
-						'uri' => $properties['uri'],
-						'name' => $properties['{DAV:}displayname'],
-					],
-				]
-			);
-
-		$this->activityManager->publish($event);
-	}
-
-	/**
-	 * Creates activities when a card was created/updated/deleted
-	 *
-	 * @param string $action
-	 * @param array $addressbookData
-	 * @param array $shares
-	 * @param array $cardData
-	 */
-	public function triggerCardActivity(string $action, array $addressbookData, array $shares, array $cardData): void {
-		if (!isset($addressbookData['principaluri'])) {
-			return;
-		}
-
-		$principalUri = $addressbookData['principaluri'];
-
-		// We are not interested in changes from the system addressbook
-		if ($principalUri === 'principals/system/system') {
-			return;
-		}
-
-		$principal = explode('/', $principalUri);
-		$owner = array_pop($principal);
-
-		$currentUser = $this->userSession->getUser();
-		if ($currentUser instanceof IUser) {
-			$currentUser = $currentUser->getUID();
-		} else {
-			$currentUser = $owner;
-		}
-
-		$card = $this->getCardNameAndId($cardData);
-
-		$event = $this->activityManager->generateEvent();
-		$event->setApp('dav')
-			->setObject('addressbook', (int) $addressbookData['id'])
-			->setType('contacts')
-			->setAuthor($currentUser);
-
-		$users = $this->getUsersForShares($shares);
-		$users[] = $owner;
-
-		// Users for share can return the owner itself if the calendar is published
-		foreach (array_unique($users) as $user) {
-			$params = [
-				'actor' => $event->getAuthor(),
-				'addressbook' => [
-					'id' => (int) $addressbookData['id'],
-					'uri' => $addressbookData['uri'],
-					'name' => $addressbookData['{DAV:}displayname'],
-				],
-				'card' => [
-					'id' => $card['id'],
-					'name' => $card['name'],
-				],
-			];
-
-
-			$event->setAffectedUser($user)
-				->setSubject(
-					$user === $currentUser ? $action . '_self' : $action,
-					$params
-				);
-
-			$this->activityManager->publish($event);
-		}
-	}
-
-	/**
-	 * @param array $cardData
-	 * @return string[]
-	 */
-	protected function getCardNameAndId(array $cardData): array {
-		$vObject = Reader::read($cardData['carddata']);
-		return ['id' => (string) $vObject->UID, 'name' => (string) ($vObject->FN ?? '')];
-	}
-
-	/**
-	 * Get all users that have access to a given calendar
-	 *
-	 * @param array $shares
-	 * @return string[]
-	 */
-	protected function getUsersForShares(array $shares): array {
-		$users = $groups = [];
-		foreach ($shares as $share) {
-			$principal = explode('/', $share['{http://owncloud.org/ns}principal']);
-			if ($principal[1] === 'users') {
-				$users[] = $principal[2];
-			} elseif ($principal[1] === 'groups') {
-				$groups[] = $principal[2];
-			}
-		}
-
-		if (!empty($groups)) {
-			foreach ($groups as $gid) {
-				$group = $this->groupManager->get($gid);
-				if ($group instanceof IGroup) {
-					foreach ($group->getUsers() as $user) {
-						$users[] = $user->getUID();
-					}
-				}
-			}
-		}
-
-		return array_unique($users);
-	}
+    /** @var IActivityManager */
+    protected $activityManager;
+
+    /** @var IGroupManager */
+    protected $groupManager;
+
+    /** @var IUserSession */
+    protected $userSession;
+
+    /** @var IAppManager */
+    protected $appManager;
+
+    /** @var IUserManager */
+    protected $userManager;
+
+    public function __construct(IActivityManager $activityManager,
+                                IGroupManager $groupManager,
+                                IUserSession $userSession,
+                                IAppManager $appManager,
+                                IUserManager $userManager) {
+        $this->activityManager = $activityManager;
+        $this->groupManager = $groupManager;
+        $this->userSession = $userSession;
+        $this->appManager = $appManager;
+        $this->userManager = $userManager;
+    }
+
+    /**
+     * Creates activities when an addressbook was creates
+     *
+     * @param array $addressbookData
+     */
+    public function onAddressbookCreate(array $addressbookData): void {
+        $this->triggerAddressbookActivity(Addressbook::SUBJECT_ADD, $addressbookData);
+    }
+
+    /**
+     * Creates activities when a calendar was updated
+     *
+     * @param array $addressbookData
+     * @param array $shares
+     * @param array $properties
+     */
+    public function onAddressbookUpdate(array $addressbookData, array $shares, array $properties): void {
+        $this->triggerAddressbookActivity(Addressbook::SUBJECT_UPDATE, $addressbookData, $shares, $properties);
+    }
+
+    /**
+     * Creates activities when a calendar was deleted
+     *
+     * @param array $addressbookData
+     * @param array $shares
+     */
+    public function onAddressbookDelete(array $addressbookData, array $shares): void {
+        $this->triggerAddressbookActivity(Addressbook::SUBJECT_DELETE, $addressbookData, $shares);
+    }
+
+    /**
+     * Creates activities for all related users when a calendar was touched
+     *
+     * @param string $action
+     * @param array $addressbookData
+     * @param array $shares
+     * @param array $changedProperties
+     */
+    protected function triggerAddressbookActivity(string $action, array $addressbookData, array $shares = [], array $changedProperties = []): void {
+        if (!isset($addressbookData['principaluri'])) {
+            return;
+        }
+
+        $principalUri = $addressbookData['principaluri'];
+
+        // We are not interested in changes from the system addressbook
+        if ($principalUri === 'principals/system/system') {
+            return;
+        }
+
+        $principal = explode('/', $principalUri);
+        $owner = array_pop($principal);
+
+        $currentUser = $this->userSession->getUser();
+        if ($currentUser instanceof IUser) {
+            $currentUser = $currentUser->getUID();
+        } else {
+            $currentUser = $owner;
+        }
+
+        $event = $this->activityManager->generateEvent();
+        $event->setApp('dav')
+            ->setObject('addressbook', (int) $addressbookData['id'])
+            ->setType('contacts')
+            ->setAuthor($currentUser);
+
+        $changedVisibleInformation = array_intersect([
+            '{DAV:}displayname',
+            '{' . Plugin::NS_CARDDAV . '}addressbook-description',
+        ], array_keys($changedProperties));
+
+        if (empty($shares) || ($action === Addressbook::SUBJECT_UPDATE && empty($changedVisibleInformation))) {
+            $users = [$owner];
+        } else {
+            $users = $this->getUsersForShares($shares);
+            $users[] = $owner;
+        }
+
+        foreach ($users as $user) {
+            if ($action === Addressbook::SUBJECT_DELETE && !$this->userManager->userExists($user)) {
+                // Avoid creating addressbook_delete activities for deleted users
+                continue;
+            }
+
+            $event->setAffectedUser($user)
+                ->setSubject(
+                    $user === $currentUser ? $action . '_self' : $action,
+                    [
+                        'actor' => $currentUser,
+                        'addressbook' => [
+                            'id' => (int) $addressbookData['id'],
+                            'uri' => $addressbookData['uri'],
+                            'name' => $addressbookData['{DAV:}displayname'],
+                        ],
+                    ]
+                );
+            $this->activityManager->publish($event);
+        }
+    }
+
+    /**
+     * Creates activities for all related users when an addressbook was (un-)shared
+     *
+     * @param array $addressbookData
+     * @param array $shares
+     * @param array $add
+     * @param array $remove
+     */
+    public function onAddressbookUpdateShares(array $addressbookData, array $shares, array $add, array $remove): void {
+        $principal = explode('/', $addressbookData['principaluri']);
+        $owner = $principal[2];
+
+        $currentUser = $this->userSession->getUser();
+        if ($currentUser instanceof IUser) {
+            $currentUser = $currentUser->getUID();
+        } else {
+            $currentUser = $owner;
+        }
+
+        $event = $this->activityManager->generateEvent();
+        $event->setApp('dav')
+            ->setObject('addressbook', (int) $addressbookData['id'])
+            ->setType('contacts')
+            ->setAuthor($currentUser);
+
+        foreach ($remove as $principal) {
+            // principal:principals/users/test
+            $parts = explode(':', $principal, 2);
+            if ($parts[0] !== 'principal') {
+                continue;
+            }
+            $principal = explode('/', $parts[1]);
+
+            if ($principal[1] === 'users') {
+                $this->triggerActivityUser(
+                    $principal[2],
+                    $event,
+                    $addressbookData,
+                    Addressbook::SUBJECT_UNSHARE_USER,
+                    Addressbook::SUBJECT_DELETE . '_self'
+                );
+
+                if ($owner !== $principal[2]) {
+                    $parameters = [
+                        'actor' => $event->getAuthor(),
+                        'addressbook' => [
+                            'id' => (int) $addressbookData['id'],
+                            'uri' => $addressbookData['uri'],
+                            'name' => $addressbookData['{DAV:}displayname'],
+                        ],
+                        'user' => $principal[2],
+                    ];
+
+                    if ($owner === $event->getAuthor()) {
+                        $subject = Addressbook::SUBJECT_UNSHARE_USER . '_you';
+                    } elseif ($principal[2] === $event->getAuthor()) {
+                        $subject = Addressbook::SUBJECT_UNSHARE_USER . '_self';
+                    } else {
+                        $event->setAffectedUser($event->getAuthor())
+                            ->setSubject(Addressbook::SUBJECT_UNSHARE_USER . '_you', $parameters);
+                        $this->activityManager->publish($event);
+
+                        $subject = Addressbook::SUBJECT_UNSHARE_USER . '_by';
+                    }
+
+                    $event->setAffectedUser($owner)
+                        ->setSubject($subject, $parameters);
+                    $this->activityManager->publish($event);
+                }
+            } elseif ($principal[1] === 'groups') {
+                $this->triggerActivityGroup($principal[2], $event, $addressbookData, Addressbook::SUBJECT_UNSHARE_USER);
+
+                $parameters = [
+                    'actor' => $event->getAuthor(),
+                    'addressbook' => [
+                        'id' => (int) $addressbookData['id'],
+                        'uri' => $addressbookData['uri'],
+                        'name' => $addressbookData['{DAV:}displayname'],
+                    ],
+                    'group' => $principal[2],
+                ];
+
+                if ($owner === $event->getAuthor()) {
+                    $subject = Addressbook::SUBJECT_UNSHARE_GROUP . '_you';
+                } else {
+                    $event->setAffectedUser($event->getAuthor())
+                        ->setSubject(Addressbook::SUBJECT_UNSHARE_GROUP . '_you', $parameters);
+                    $this->activityManager->publish($event);
+
+                    $subject = Addressbook::SUBJECT_UNSHARE_GROUP . '_by';
+                }
+
+                $event->setAffectedUser($owner)
+                    ->setSubject($subject, $parameters);
+                $this->activityManager->publish($event);
+            }
+        }
+
+        foreach ($add as $share) {
+            if ($this->isAlreadyShared($share['href'], $shares)) {
+                continue;
+            }
+
+            // principal:principals/users/test
+            $parts = explode(':', $share['href'], 2);
+            if ($parts[0] !== 'principal') {
+                continue;
+            }
+            $principal = explode('/', $parts[1]);
+
+            if ($principal[1] === 'users') {
+                $this->triggerActivityUser($principal[2], $event, $addressbookData, Addressbook::SUBJECT_SHARE_USER);
+
+                if ($owner !== $principal[2]) {
+                    $parameters = [
+                        'actor' => $event->getAuthor(),
+                        'addressbook' => [
+                            'id' => (int) $addressbookData['id'],
+                            'uri' => $addressbookData['uri'],
+                            'name' => $addressbookData['{DAV:}displayname'],
+                        ],
+                        'user' => $principal[2],
+                    ];
+
+                    if ($owner === $event->getAuthor()) {
+                        $subject = Addressbook::SUBJECT_SHARE_USER . '_you';
+                    } else {
+                        $event->setAffectedUser($event->getAuthor())
+                            ->setSubject(Addressbook::SUBJECT_SHARE_USER . '_you', $parameters);
+                        $this->activityManager->publish($event);
+
+                        $subject = Addressbook::SUBJECT_SHARE_USER . '_by';
+                    }
+
+                    $event->setAffectedUser($owner)
+                        ->setSubject($subject, $parameters);
+                    $this->activityManager->publish($event);
+                }
+            } elseif ($principal[1] === 'groups') {
+                $this->triggerActivityGroup($principal[2], $event, $addressbookData, Addressbook::SUBJECT_SHARE_USER);
+
+                $parameters = [
+                    'actor' => $event->getAuthor(),
+                    'addressbook' => [
+                        'id' => (int) $addressbookData['id'],
+                        'uri' => $addressbookData['uri'],
+                        'name' => $addressbookData['{DAV:}displayname'],
+                    ],
+                    'group' => $principal[2],
+                ];
+
+                if ($owner === $event->getAuthor()) {
+                    $subject = Addressbook::SUBJECT_SHARE_GROUP . '_you';
+                } else {
+                    $event->setAffectedUser($event->getAuthor())
+                        ->setSubject(Addressbook::SUBJECT_SHARE_GROUP . '_you', $parameters);
+                    $this->activityManager->publish($event);
+
+                    $subject = Addressbook::SUBJECT_SHARE_GROUP . '_by';
+                }
+
+                $event->setAffectedUser($owner)
+                    ->setSubject($subject, $parameters);
+                $this->activityManager->publish($event);
+            }
+        }
+    }
+
+    /**
+     * Checks if a calendar is already shared with a principal
+     *
+     * @param string $principal
+     * @param array[] $shares
+     * @return bool
+     */
+    protected function isAlreadyShared(string $principal, array $shares): bool {
+        foreach ($shares as $share) {
+            if ($principal === $share['href']) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Creates the given activity for all members of the given group
+     *
+     * @param string $gid
+     * @param IEvent $event
+     * @param array $properties
+     * @param string $subject
+     */
+    protected function triggerActivityGroup(string $gid, IEvent $event, array $properties, string $subject): void {
+        $group = $this->groupManager->get($gid);
+
+        if ($group instanceof IGroup) {
+            foreach ($group->getUsers() as $user) {
+                // Exclude current user
+                if ($user->getUID() !== $event->getAuthor()) {
+                    $this->triggerActivityUser($user->getUID(), $event, $properties, $subject);
+                }
+            }
+        }
+    }
+
+    /**
+     * Creates the given activity for the given user
+     *
+     * @param string $user
+     * @param IEvent $event
+     * @param array $properties
+     * @param string $subject
+     * @param string $subjectSelf
+     */
+    protected function triggerActivityUser(string $user, IEvent $event, array $properties, string $subject, string $subjectSelf = ''): void {
+        $event->setAffectedUser($user)
+            ->setSubject(
+                $user === $event->getAuthor() && $subjectSelf ? $subjectSelf : $subject,
+                [
+                    'actor' => $event->getAuthor(),
+                    'addressbook' => [
+                        'id' => (int) $properties['id'],
+                        'uri' => $properties['uri'],
+                        'name' => $properties['{DAV:}displayname'],
+                    ],
+                ]
+            );
+
+        $this->activityManager->publish($event);
+    }
+
+    /**
+     * Creates activities when a card was created/updated/deleted
+     *
+     * @param string $action
+     * @param array $addressbookData
+     * @param array $shares
+     * @param array $cardData
+     */
+    public function triggerCardActivity(string $action, array $addressbookData, array $shares, array $cardData): void {
+        if (!isset($addressbookData['principaluri'])) {
+            return;
+        }
+
+        $principalUri = $addressbookData['principaluri'];
+
+        // We are not interested in changes from the system addressbook
+        if ($principalUri === 'principals/system/system') {
+            return;
+        }
+
+        $principal = explode('/', $principalUri);
+        $owner = array_pop($principal);
+
+        $currentUser = $this->userSession->getUser();
+        if ($currentUser instanceof IUser) {
+            $currentUser = $currentUser->getUID();
+        } else {
+            $currentUser = $owner;
+        }
+
+        $card = $this->getCardNameAndId($cardData);
+
+        $event = $this->activityManager->generateEvent();
+        $event->setApp('dav')
+            ->setObject('addressbook', (int) $addressbookData['id'])
+            ->setType('contacts')
+            ->setAuthor($currentUser);
+
+        $users = $this->getUsersForShares($shares);
+        $users[] = $owner;
+
+        // Users for share can return the owner itself if the calendar is published
+        foreach (array_unique($users) as $user) {
+            $params = [
+                'actor' => $event->getAuthor(),
+                'addressbook' => [
+                    'id' => (int) $addressbookData['id'],
+                    'uri' => $addressbookData['uri'],
+                    'name' => $addressbookData['{DAV:}displayname'],
+                ],
+                'card' => [
+                    'id' => $card['id'],
+                    'name' => $card['name'],
+                ],
+            ];
+
+
+            $event->setAffectedUser($user)
+                ->setSubject(
+                    $user === $currentUser ? $action . '_self' : $action,
+                    $params
+                );
+
+            $this->activityManager->publish($event);
+        }
+    }
+
+    /**
+     * @param array $cardData
+     * @return string[]
+     */
+    protected function getCardNameAndId(array $cardData): array {
+        $vObject = Reader::read($cardData['carddata']);
+        return ['id' => (string) $vObject->UID, 'name' => (string) ($vObject->FN ?? '')];
+    }
+
+    /**
+     * Get all users that have access to a given calendar
+     *
+     * @param array $shares
+     * @return string[]
+     */
+    protected function getUsersForShares(array $shares): array {
+        $users = $groups = [];
+        foreach ($shares as $share) {
+            $principal = explode('/', $share['{http://owncloud.org/ns}principal']);
+            if ($principal[1] === 'users') {
+                $users[] = $principal[2];
+            } elseif ($principal[1] === 'groups') {
+                $groups[] = $principal[2];
+            }
+        }
+
+        if (!empty($groups)) {
+            foreach ($groups as $gid) {
+                $group = $this->groupManager->get($gid);
+                if ($group instanceof IGroup) {
+                    foreach ($group->getUsers() as $user) {
+                        $users[] = $user->getUID();
+                    }
+                }
+            }
+        }
+
+        return array_unique($users);
+    }
 }

apps/dav/lib/CardDAV/Activity/Provider/Card.php

Indentation +105 added lines, -105 removed lines

@@ -36,109 +36,109 @@
 use OCP\L10N\IFactory;
 
 class Card extends Base {
-	public const SUBJECT_ADD = 'card_add';
-	public const SUBJECT_UPDATE = 'card_update';
-	public const SUBJECT_DELETE = 'card_delete';
-
-	/** @var IFactory */
-	protected $languageFactory;
-
-	/** @var IManager */
-	protected $activityManager;
-
-	/** @var IEventMerger */
-	protected $eventMerger;
-
-	/** @var IAppManager */
-	protected $appManager;
-
-	public function __construct(IFactory $languageFactory,
-								IURLGenerator $url,
-								IManager $activityManager,
-								IUserManager $userManager,
-								IGroupManager $groupManager,
-								IEventMerger $eventMerger,
-								IAppManager $appManager) {
-		parent::__construct($userManager, $groupManager, $url);
-		$this->languageFactory = $languageFactory;
-		$this->activityManager = $activityManager;
-		$this->eventMerger = $eventMerger;
-		$this->appManager = $appManager;
-	}
-
-	/**
-	 * @param string $language
-	 * @param IEvent $event
-	 * @param IEvent|null $previousEvent
-	 * @return IEvent
-	 * @throws \InvalidArgumentException
-	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
-		if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
-			throw new \InvalidArgumentException();
-		}
-
-		$l = $this->languageFactory->get('dav', $language);
-
-		if ($this->activityManager->getRequirePNG()) {
-			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts-dark.png')));
-		} else {
-			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts.svg')));
-		}
-
-		if ($event->getSubject() === self::SUBJECT_ADD) {
-			$subject = $l->t('{actor} created contact {card} in address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_ADD . '_self') {
-			$subject = $l->t('You created contact {card} in address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_DELETE) {
-			$subject = $l->t('{actor} deleted contact {card} from address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
-			$subject = $l->t('You deleted contact {card} from address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_UPDATE) {
-			$subject = $l->t('{actor} updated contact {card} in address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
-			$subject = $l->t('You updated contact {card} in address book {addressbook}');
-		} else {
-			throw new \InvalidArgumentException();
-		}
-
-		$parsedParameters = $this->getParameters($event, $l);
-		$this->setSubjects($event, $subject, $parsedParameters);
-
-		$event = $this->eventMerger->mergeEvents('card', $event, $previousEvent);
-		return $event;
-	}
-
-	protected function getParameters(IEvent $event, IL10N $l): array {
-		$subject = $event->getSubject();
-		$parameters = $event->getSubjectParameters();
-
-		switch ($subject) {
-			case self::SUBJECT_ADD:
-			case self::SUBJECT_DELETE:
-			case self::SUBJECT_UPDATE:
-				return [
-					'actor' => $this->generateUserParameter($parameters['actor']),
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'card' => $this->generateCardParameter($parameters['card']),
-				];
-			case self::SUBJECT_ADD . '_self':
-			case self::SUBJECT_DELETE . '_self':
-			case self::SUBJECT_UPDATE . '_self':
-				return [
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'card' => $this->generateCardParameter($parameters['card']),
-				];
-		}
-
-		throw new \InvalidArgumentException();
-	}
-
-	private function generateCardParameter(array $cardData): array {
-		return [
-			'type' => 'addressbook-contact',
-			'id' => $cardData['id'],
-			'name' => $cardData['name'],
-		];
-	}
+    public const SUBJECT_ADD = 'card_add';
+    public const SUBJECT_UPDATE = 'card_update';
+    public const SUBJECT_DELETE = 'card_delete';
+
+    /** @var IFactory */
+    protected $languageFactory;
+
+    /** @var IManager */
+    protected $activityManager;
+
+    /** @var IEventMerger */
+    protected $eventMerger;
+
+    /** @var IAppManager */
+    protected $appManager;
+
+    public function __construct(IFactory $languageFactory,
+                                IURLGenerator $url,
+                                IManager $activityManager,
+                                IUserManager $userManager,
+                                IGroupManager $groupManager,
+                                IEventMerger $eventMerger,
+                                IAppManager $appManager) {
+        parent::__construct($userManager, $groupManager, $url);
+        $this->languageFactory = $languageFactory;
+        $this->activityManager = $activityManager;
+        $this->eventMerger = $eventMerger;
+        $this->appManager = $appManager;
+    }
+
+    /**
+     * @param string $language
+     * @param IEvent $event
+     * @param IEvent|null $previousEvent
+     * @return IEvent
+     * @throws \InvalidArgumentException
+     */
+    public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+        if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
+            throw new \InvalidArgumentException();
+        }
+
+        $l = $this->languageFactory->get('dav', $language);
+
+        if ($this->activityManager->getRequirePNG()) {
+            $event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts-dark.png')));
+        } else {
+            $event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts.svg')));
+        }
+
+        if ($event->getSubject() === self::SUBJECT_ADD) {
+            $subject = $l->t('{actor} created contact {card} in address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_ADD . '_self') {
+            $subject = $l->t('You created contact {card} in address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_DELETE) {
+            $subject = $l->t('{actor} deleted contact {card} from address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
+            $subject = $l->t('You deleted contact {card} from address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_UPDATE) {
+            $subject = $l->t('{actor} updated contact {card} in address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
+            $subject = $l->t('You updated contact {card} in address book {addressbook}');
+        } else {
+            throw new \InvalidArgumentException();
+        }
+
+        $parsedParameters = $this->getParameters($event, $l);
+        $this->setSubjects($event, $subject, $parsedParameters);
+
+        $event = $this->eventMerger->mergeEvents('card', $event, $previousEvent);
+        return $event;
+    }
+
+    protected function getParameters(IEvent $event, IL10N $l): array {
+        $subject = $event->getSubject();
+        $parameters = $event->getSubjectParameters();
+
+        switch ($subject) {
+            case self::SUBJECT_ADD:
+            case self::SUBJECT_DELETE:
+            case self::SUBJECT_UPDATE:
+                return [
+                    'actor' => $this->generateUserParameter($parameters['actor']),
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'card' => $this->generateCardParameter($parameters['card']),
+                ];
+            case self::SUBJECT_ADD . '_self':
+            case self::SUBJECT_DELETE . '_self':
+            case self::SUBJECT_UPDATE . '_self':
+                return [
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'card' => $this->generateCardParameter($parameters['card']),
+                ];
+        }
+
+        throw new \InvalidArgumentException();
+    }
+
+    private function generateCardParameter(array $cardData): array {
+        return [
+            'type' => 'addressbook-contact',
+            'id' => $cardData['id'],
+            'name' => $cardData['name'],
+        ];
+    }
 }

apps/dav/lib/CardDAV/Activity/Provider/Addressbook.php

Indentation +153 added lines, -153 removed lines

@@ -35,157 +35,157 @@
 use OCP\L10N\IFactory;
 
 class Addressbook extends Base {
-	public const SUBJECT_ADD = 'addressbook_add';
-	public const SUBJECT_UPDATE = 'addressbook_update';
-	public const SUBJECT_DELETE = 'addressbook_delete';
-	public const SUBJECT_SHARE_USER = 'addressbook_user_share';
-	public const SUBJECT_SHARE_GROUP = 'addressbook_group_share';
-	public const SUBJECT_UNSHARE_USER = 'addressbook_user_unshare';
-	public const SUBJECT_UNSHARE_GROUP = 'addressbook_group_unshare';
-
-	/** @var IFactory */
-	protected $languageFactory;
-
-	/** @var IManager */
-	protected $activityManager;
-
-	/** @var IEventMerger */
-	protected $eventMerger;
-
-	public function __construct(IFactory $languageFactory,
-								IURLGenerator $url,
-								IManager $activityManager,
-								IUserManager $userManager,
-								IGroupManager $groupManager,
-								IEventMerger $eventMerger) {
-		parent::__construct($userManager, $groupManager, $url);
-		$this->languageFactory = $languageFactory;
-		$this->activityManager = $activityManager;
-		$this->eventMerger = $eventMerger;
-	}
-
-	/**
-	 * @param string $language
-	 * @param IEvent $event
-	 * @param IEvent|null $previousEvent
-	 * @return IEvent
-	 * @throws \InvalidArgumentException
-	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
-		if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
-			throw new \InvalidArgumentException();
-		}
-
-		$l = $this->languageFactory->get('dav', $language);
-
-		if ($this->activityManager->getRequirePNG()) {
-			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts-dark.png')));
-		} else {
-			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts.svg')));
-		}
-
-		if ($event->getSubject() === self::SUBJECT_ADD) {
-			$subject = $l->t('{actor} created address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_ADD . '_self') {
-			$subject = $l->t('You created address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_DELETE) {
-			$subject = $l->t('{actor} deleted address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
-			$subject = $l->t('You deleted address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_UPDATE) {
-			$subject = $l->t('{actor} updated address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
-			$subject = $l->t('You updated address book {addressbook}');
-		} elseif ($event->getSubject() === self::SUBJECT_SHARE_USER) {
-			$subject = $l->t('{actor} shared address book {addressbook} with you');
-		} elseif ($event->getSubject() === self::SUBJECT_SHARE_USER . '_you') {
-			$subject = $l->t('You shared address book {addressbook} with {user}');
-		} elseif ($event->getSubject() === self::SUBJECT_SHARE_USER . '_by') {
-			$subject = $l->t('{actor} shared address book {addressbook} with {user}');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER) {
-			$subject = $l->t('{actor} unshared address book {addressbook} from you');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_you') {
-			$subject = $l->t('You unshared address book {addressbook} from {user}');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_by') {
-			$subject = $l->t('{actor} unshared address book {addressbook} from {user}');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_self') {
-			$subject = $l->t('{actor} unshared address book {addressbook} from themselves');
-		} elseif ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_you') {
-			$subject = $l->t('You shared address book {addressbook} with group {group}');
-		} elseif ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_by') {
-			$subject = $l->t('{actor} shared address book {addressbook} with group {group}');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_you') {
-			$subject = $l->t('You unshared address book {addressbook} from group {group}');
-		} elseif ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_by') {
-			$subject = $l->t('{actor} unshared address book {addressbook} from group {group}');
-		} else {
-			throw new \InvalidArgumentException();
-		}
-
-		$parsedParameters = $this->getParameters($event, $l);
-		$this->setSubjects($event, $subject, $parsedParameters);
-
-		$event = $this->eventMerger->mergeEvents('addressbook', $event, $previousEvent);
-
-		if ($event->getChildEvent() === null) {
-			if (isset($parsedParameters['user'])) {
-				// Couldn't group by calendar, maybe we can group by users
-				$event = $this->eventMerger->mergeEvents('user', $event, $previousEvent);
-			} elseif (isset($parsedParameters['group'])) {
-				// Couldn't group by calendar, maybe we can group by groups
-				$event = $this->eventMerger->mergeEvents('group', $event, $previousEvent);
-			}
-		}
-
-		return $event;
-	}
-
-	protected function getParameters(IEvent $event, IL10N $l): array {
-		$subject = $event->getSubject();
-		$parameters = $event->getSubjectParameters();
-
-		switch ($subject) {
-			case self::SUBJECT_ADD:
-			case self::SUBJECT_ADD . '_self':
-			case self::SUBJECT_DELETE:
-			case self::SUBJECT_DELETE . '_self':
-			case self::SUBJECT_UPDATE:
-			case self::SUBJECT_UPDATE . '_self':
-			case self::SUBJECT_SHARE_USER:
-			case self::SUBJECT_UNSHARE_USER:
-			case self::SUBJECT_UNSHARE_USER . '_self':
-				return [
-					'actor' => $this->generateUserParameter($parameters['actor']),
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-				];
-			case self::SUBJECT_SHARE_USER . '_you':
-			case self::SUBJECT_UNSHARE_USER . '_you':
-				return [
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'user' => $this->generateUserParameter($parameters['user']),
-				];
-			case self::SUBJECT_SHARE_USER . '_by':
-			case self::SUBJECT_UNSHARE_USER . '_by':
-				return [
-					'actor' => $this->generateUserParameter($parameters['actor']),
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'user' => $this->generateUserParameter($parameters['user']),
-				];
-			case self::SUBJECT_SHARE_GROUP . '_you':
-			case self::SUBJECT_UNSHARE_GROUP . '_you':
-				return [
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'group' => $this->generateGroupParameter($parameters['group']),
-				];
-			case self::SUBJECT_SHARE_GROUP . '_by':
-			case self::SUBJECT_UNSHARE_GROUP . '_by':
-				return [
-					'actor' => $this->generateUserParameter($parameters['actor']),
-					'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
-					'group' => $this->generateGroupParameter($parameters['group']),
-				];
-		}
-
-		throw new \InvalidArgumentException();
-	}
+    public const SUBJECT_ADD = 'addressbook_add';
+    public const SUBJECT_UPDATE = 'addressbook_update';
+    public const SUBJECT_DELETE = 'addressbook_delete';
+    public const SUBJECT_SHARE_USER = 'addressbook_user_share';
+    public const SUBJECT_SHARE_GROUP = 'addressbook_group_share';
+    public const SUBJECT_UNSHARE_USER = 'addressbook_user_unshare';
+    public const SUBJECT_UNSHARE_GROUP = 'addressbook_group_unshare';
+
+    /** @var IFactory */
+    protected $languageFactory;
+
+    /** @var IManager */
+    protected $activityManager;
+
+    /** @var IEventMerger */
+    protected $eventMerger;
+
+    public function __construct(IFactory $languageFactory,
+                                IURLGenerator $url,
+                                IManager $activityManager,
+                                IUserManager $userManager,
+                                IGroupManager $groupManager,
+                                IEventMerger $eventMerger) {
+        parent::__construct($userManager, $groupManager, $url);
+        $this->languageFactory = $languageFactory;
+        $this->activityManager = $activityManager;
+        $this->eventMerger = $eventMerger;
+    }
+
+    /**
+     * @param string $language
+     * @param IEvent $event
+     * @param IEvent|null $previousEvent
+     * @return IEvent
+     * @throws \InvalidArgumentException
+     */
+    public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+        if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
+            throw new \InvalidArgumentException();
+        }
+
+        $l = $this->languageFactory->get('dav', $language);
+
+        if ($this->activityManager->getRequirePNG()) {
+            $event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts-dark.png')));
+        } else {
+            $event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/contacts.svg')));
+        }
+
+        if ($event->getSubject() === self::SUBJECT_ADD) {
+            $subject = $l->t('{actor} created address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_ADD . '_self') {
+            $subject = $l->t('You created address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_DELETE) {
+            $subject = $l->t('{actor} deleted address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
+            $subject = $l->t('You deleted address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_UPDATE) {
+            $subject = $l->t('{actor} updated address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
+            $subject = $l->t('You updated address book {addressbook}');
+        } elseif ($event->getSubject() === self::SUBJECT_SHARE_USER) {
+            $subject = $l->t('{actor} shared address book {addressbook} with you');
+        } elseif ($event->getSubject() === self::SUBJECT_SHARE_USER . '_you') {
+            $subject = $l->t('You shared address book {addressbook} with {user}');
+        } elseif ($event->getSubject() === self::SUBJECT_SHARE_USER . '_by') {
+            $subject = $l->t('{actor} shared address book {addressbook} with {user}');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER) {
+            $subject = $l->t('{actor} unshared address book {addressbook} from you');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_you') {
+            $subject = $l->t('You unshared address book {addressbook} from {user}');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_by') {
+            $subject = $l->t('{actor} unshared address book {addressbook} from {user}');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_self') {
+            $subject = $l->t('{actor} unshared address book {addressbook} from themselves');
+        } elseif ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_you') {
+            $subject = $l->t('You shared address book {addressbook} with group {group}');
+        } elseif ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_by') {
+            $subject = $l->t('{actor} shared address book {addressbook} with group {group}');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_you') {
+            $subject = $l->t('You unshared address book {addressbook} from group {group}');
+        } elseif ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_by') {
+            $subject = $l->t('{actor} unshared address book {addressbook} from group {group}');
+        } else {
+            throw new \InvalidArgumentException();
+        }
+
+        $parsedParameters = $this->getParameters($event, $l);
+        $this->setSubjects($event, $subject, $parsedParameters);
+
+        $event = $this->eventMerger->mergeEvents('addressbook', $event, $previousEvent);
+
+        if ($event->getChildEvent() === null) {
+            if (isset($parsedParameters['user'])) {
+                // Couldn't group by calendar, maybe we can group by users
+                $event = $this->eventMerger->mergeEvents('user', $event, $previousEvent);
+            } elseif (isset($parsedParameters['group'])) {
+                // Couldn't group by calendar, maybe we can group by groups
+                $event = $this->eventMerger->mergeEvents('group', $event, $previousEvent);
+            }
+        }
+
+        return $event;
+    }
+
+    protected function getParameters(IEvent $event, IL10N $l): array {
+        $subject = $event->getSubject();
+        $parameters = $event->getSubjectParameters();
+
+        switch ($subject) {
+            case self::SUBJECT_ADD:
+            case self::SUBJECT_ADD . '_self':
+            case self::SUBJECT_DELETE:
+            case self::SUBJECT_DELETE . '_self':
+            case self::SUBJECT_UPDATE:
+            case self::SUBJECT_UPDATE . '_self':
+            case self::SUBJECT_SHARE_USER:
+            case self::SUBJECT_UNSHARE_USER:
+            case self::SUBJECT_UNSHARE_USER . '_self':
+                return [
+                    'actor' => $this->generateUserParameter($parameters['actor']),
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                ];
+            case self::SUBJECT_SHARE_USER . '_you':
+            case self::SUBJECT_UNSHARE_USER . '_you':
+                return [
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'user' => $this->generateUserParameter($parameters['user']),
+                ];
+            case self::SUBJECT_SHARE_USER . '_by':
+            case self::SUBJECT_UNSHARE_USER . '_by':
+                return [
+                    'actor' => $this->generateUserParameter($parameters['actor']),
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'user' => $this->generateUserParameter($parameters['user']),
+                ];
+            case self::SUBJECT_SHARE_GROUP . '_you':
+            case self::SUBJECT_UNSHARE_GROUP . '_you':
+                return [
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'group' => $this->generateGroupParameter($parameters['group']),
+                ];
+            case self::SUBJECT_SHARE_GROUP . '_by':
+            case self::SUBJECT_UNSHARE_GROUP . '_by':
+                return [
+                    'actor' => $this->generateUserParameter($parameters['actor']),
+                    'addressbook' => $this->generateAddressbookParameter($parameters['addressbook'], $l),
+                    'group' => $this->generateGroupParameter($parameters['group']),
+                ];
+        }
+
+        throw new \InvalidArgumentException();
+    }
 }